16/32 Quadrature Amplitude Modulation (16/32 QAM) A modulation method where the phase of the carrier is shifted through 16 or 32 phase differences. Each symbol (carrier phase position) represents 4 data bits for 16 QAM and 5 data bits for 32 QAM. 64K Service A Speech or Data service requiring a 64 kbps connection all the way out to the TRU hardware in the BTS. There are two such services: General Packet Radio Service (GPRS) using channel code for packet data block type 1 (CS‐3) or (CS‐4). Enhanced General Packet Radio Service (EGPRS) using channel code for modulation and coding scheme types 0 to 9 (MCS‐ 0 to MCS‐9). 64KRES‐Pool A pool of Abis paths reserved for 64 kbps data. This pool allows 64 kbps user to user connections. 8 Phase Shift Keying (8‐PSK) A modulation method where the phase of the carrier is shifted through 8 phase differences. Each symbol (carrier phase position) represents 3 data bits. A‐CIC A‐interface Circuit Identity Code, the identification of the traffic connection on the A interface. A‐Interface The interface between the BSC/TRC and the MSC. A‐Interface Terrestrial Resource The traffic connection between the MSC and the TRC.
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16/32 Quadrature Amplitude Modulation (16/32 QAM) A modulation method where the phase of the carrier is shifted through 16 or 32 phase differences. Each symbol (carrier phase position) represents 4 data bits for 16 QAM and 5 data bits for 32 QAM.
64K Service A Speech or Data service requiring a 64 kbps connection all the way out to the TRU hardware in the BTS. There are two such services: General Packet Radio Service (GPRS) using channel code for packet data block type 1 (CS‐3) or (CS‐4). Enhanced General Packet Radio Service (EGPRS) using channel code for modulation and coding scheme types 0 to 9 (MCS‐0 to MCS‐9).
64KRES‐Pool A pool of Abis paths reserved for 64 kbps data. This pool allows 64 kbps user to user connections.
8 Phase Shift Keying (8‐PSK) A modulation method where the phase of the carrier is shifted through 8 phase differences. Each symbol (carrier phase position) represents 3 data bits.
A‐CIC A‐interface Circuit Identity Code, the identification of the traffic connection on the A interface.
A‐Interface The interface between the BSC/TRC and the MSC.
A‐Interface Terrestrial Resource The traffic connection between the MSC and the TRC.
Abi ace The ace the BSC and the BTS an (E)GPRS po t
A‐Interface Type The user plane connection over the A‐interface can be realized in three different ways depending on MSC and BSC configurations: PCM over TDM ‐ Transport of PCM coded speech over an A‐interface with TDM. Transcoder resources are located in the BSS. PCM over IP ‐ Transport of PCM coded speech over an A‐interface with RTP, UDP, and IP. Transcoder resources are located in the BSS. Full IP ‐ Transport of compressed speech over an A‐interface with RTP, UDP, and IP. Transcoder resources are located in the Core Network (CN). Circuit switched data is transported either over TDM or over IP with rate adaptation in the BSS, corresponding to PCM over TDM and PCM over IP.
Abis Interface The interface between the BSC and the BTS.
Abis Interfaces Interf The interface between the BSC and the BTS From an (E)GPRS point of interf between . From in of view, this interface runs between the PCU and the BTS.
Abis Path An Abis path is a virtual circuit between the BSC and the BTS. An Abis path can be realized by one of the following: A PCM timeslot, Super channels together with ET devices, Super channels over an IP network
Abis Transmission Device The Abis Transmission Device is used either for the signalling path to object classes terminating layer 2, or for speech and data connection to the TS.
Abis Transmission Resource The traffic connection between the BSC and the BTS.
Above S GSM neighbouring cells categorized above serving cell in candidate list.
annel num ers the BCCH carr mon d the active
Access Cell The cell in which recording is started for a connection, according to a triggering event. The access cell is specified in the initiation command.
Access State The access state indicates if a managed object in the BTS is accessible for O&M (Operation and Maintenance) signalling over the Abis interface. A managed object can be: CONNECTED Accessible for O&M signalling. DISCONNECTED Not accessible for O&M signalling. LOCALLY DISCONNECTED Not accessible for O&M signalling due to local maintenance activities.
Accumulated Hold Time The accumulated hold time is the hold time for 64 calls for one transcoder resource.
Active BA‐List An active BCCH Allocation list provides the absolute radio frequency channel numbers of the BCCH carriers to be monitored by the activech b of iers to be itore by MSs in the cell.
Active Codec Set (ACS) ACS is the codec set that is active for the connection. Active means that each mode in the codec set can be used at any time during a call.
Active PFC A PFC is active when data is ready to be scheduled or is expected within a short time.
Active RP An RP with hardware and software configured operational and currently in use by the application.
Active VAMOS Pair When both logical channels in a VAMOS pair have been allocated for MSs, the VAMOS pair is active..
(PFC) It use e pr and we ht ling and
Adaptive Multi Rate (AMR) A codec that can operate at various combinations of speech and channel coding bitrates for each channel rate. AMR‐NB is also referred to as Speech Version 3. AMR‐WB is also referred to as Speech Version 5.
Additional Assignment Tells whether a TS can handle the case when the two TCH/H are assigned to the same MS, to provide the concurrent channels.
Additional Streaming PDCH A streaming TBF might have ‐ in addition to its Effective Streaming PDCHs ‐ further PDCHs which are not needed in order to fulfill the Guaranteed Bitrate. These PDCHs are called Additional Streaming PDCHs. On those Additional Streaming PDCHs streaming data is scheduled with a lower QoS priority.
Aggregate BSS QoS Profile (ABQP) The negotiated or predefined QoS profile for a Packet Flow Context (PFC) It is used to determine priority and weight at Scheduling and. is d to d termine iority ig at Schedu PDCH Reservation.
Air Interface Rate The transfer rate in the air interface including additional data related to transmission protocols.
Air Interface User Rate The transfer rate in the air interface for user data.
Alarm A printout informing the operator that an abnormal situation is present in the BSC or BTS. The alarm contains information on the affected object.
Alarm Class Indicates the priority of an alarm or alarm situation from A1 (highest) to O2 (lowest).
AXE Alarm Class A1: Alarm Severity Indicator 1AXE Alarm Class A2: Alarm Severity Indicator 2AXE Alarm Class A3: Alarm Severity Indicator 3
Alarm Sit The arm the hi est pr dication on a managed
AXE Alarm Class O1: Alarm Severity Indicator 4AXE Alarm Class O2: Alarm Severity Indicator 5
Alarm Level The mean hold time alarm level is a function of the hold time of a transcoder pools resources and a specified alarm percentage measured in seconds.
Alarm Level Percentage A percentage value set by command, used to determine the mean hold time alarm level for a transcoder pool.
Alarm Mask The Operator can, by command, specify an Alarm Mask in order to suppress specified alarms altogether. Information on all reported faults is still available.
Alarm Situation uation The alarm situation is the highest priority fault indication on a managed al situation is gh iority fault in object (either BSC Fault or BTS Condition)
Alarm Situation Classification The default and user specified alarm classes for all defined alarm situations. For each defined alarm situation there is an Ericsson defined default alarm class. The user may specify a new alarm class for each of a number of alarm situations.
Alarm Slogan The alphanumeric description of one or more alarm situations.
Alternative Routing A mechanism by which an MS is moved to another MSC by using MSC Selection. The mechanism is triggered when an SCCP Connection establishment between the BSC and the MSC fails due to either signalling link failure (physical) or if an SCCP CONNECTION REFUSAL message is returned from the MSC.
AMR‐NB Adaptive multirate with bandwidth from 300 to 3400 Hz. There are eight bitrates from 4.25 to 12.2 kbps available. AMR‐NB is also referred to as Speech Version 3.
AMR‐WB Adaptive multirate with bandwidth from 100 to 7000 Hz. There are three bitrates, 6.6, 8.85 and 12.65 kbps, which make up the mandatory multirate configuration. AMR‐WB is also referred to as Speech Version 5.
Antenna Hopping A way to decrease downlink diversity by alternatively use two or more TX antennas. Possible values are:
OFF: Antenna Hopping is not enabled.
ON: Antenna Hopping enabled on all frequencies.
ONXC0: Antenna Hopping enabled on all but the BCCH frequency.
APDU This is a variable length information element that conveys an embedded message or message segment associated with a higher level protocol. In this instance it contains an RRLP.
APG40/43 The APG40/43 is the intended replacement for the IOG. It is a Windows NT‐based platform. It will handle some of the OSS‐based parts of the SCS framework.
Application Object (AO) (G12) An Application Object provides a part of the functionality in a Base Transceiver Station. An Application Object instance has O&M communication with a BSC on Layer 3, through a specific Service Object instance. The following Managed Objects are Application Objects:
ASSIGNMENT REQUEST or the VGCS/VBS ASSIGNMENT REQUEST
Transmitter (TX), Receiver (RX), Time Slot (TS), Interface Switch (IS), Digital Path (DP), Concentrator (CON), Timing Function (TF), and Multi Carrier Transceiver (MCTR).
APT AXE switching system.
APZ AXE control system.
Assignment Queuing Timer A timer that decides for how long time assignment is tried for a Priority Connection, including time in queue. The timer is started at reception of the ASSIGNMENT REQUEST or the VGCS/VBS ASSIGNMENT REQUEST message.
Assignment Timer A timer that decides for how long time assignment is tried for a non Priority Connection. The timer is started at reception of the ASSIGNMENT REQUEST or the VGCS/VBS ASSIGNMENT REQUEST message.
Assistance Data The data sent from the network to the MS to reduce the MS power consumption and time needed for signal measurements and location estimate calculations.
Ater Interface The interface between a TRC and an BSC.
Ater Interface Terrestrial Resource The traffic connection between the BSC and the TRC.
Ater‐CIC Ater Interface Circuit Identity Code, the identification of the traffic connection on the Ater interface.
ATT IMSI attach‐detach allowed.
BA IND BCCH All tion sequence num er dica 0 1
Automatic Supervision Supervision of cells, leading to tests being automatically performed when a cell is suspected to be faulty because certain criteria have not been met.
AVID Immediate Assignment A non GSM standardized procedure used for Immediate Assignment when the Abis interface is over satellite. To compensate for the delay, the IMMEDIATE ASSIGNMENT message is sent before the CHANNEL ACTIVATION ACKNOWLEDGE message is received.
BA List A BCCH Allocation list provides the absolute radio frequency channel numbers of the BCCH carriers for GSM cells to be monitored by the MSs in the cell. There are two separate lists. One for MSs in idle mode and one for MSs in active mode.
BA IND‐ BCCH Allocation sequence number indicator Range: 0 to 1 oca b in tor. Range: to .
The BA‐IND is needed to allow the GSM network to discriminate measurement results related to different BA lists sent to the MS.
BA‐IND for UTRAN network is called 3G‐BA‐IND.
Background Class Used by applications without any requirements on bitrate or delay. The users will get service when users of other traffic classes don't request it. Typical applications are file transfers or e‐mail.
Base Station Controller (BSC) The part of the Base Station System (BSS) that contains radio network control functions.
Base Station Controller Managed Object Instance (BSC‐MOI)
The entity in the BSC representing the managed object instance in the BTS.
Base Station System (BSS) A Base Station System consists of the following:
Base Station Controllers (BSCs), including Transcoder Controllers (TRCs)
Base Transceiver Stations (BTSs)Operation and Support System (OSS)
The BSS is responsible for all the radio related functions in the system such as:
Radio communication with Mobile StationsHandover of calls in progress between cellsManagement of all radio network resources and cell configuration data
Base Station System Application Part (BSSAP) The standardized protocol used for signalling between the MSC and the BSC on the A‐interface.
Base Station System GPRS Protocol (BSSGP) The layer 3 protocol used on the Gb interface, defined in 3GPP TS 48.018.
Base Transceiver Station (BTS) The Base Transceiver Station (BTS) is used to handle radio traffic to and from the Mobile Stations (MSs) within a specific cell.
Base Transceiver Station Managed Object Instance (BTS‐MOI)
The managed object instance in the BTS as opposed to the entity seen in the BSC.
Basic GPRS PDCH (B‐PDCH) A logical channel used for transfer of GPRS (CS‐1 and CS‐2) packet data and control signalling. A B‐PDCH uses a 16 kbps Abis link.
c Phys Channel (BPC) A BPC one times us one set occurr on every
Basic GPRS TBF (B‐TBF) A TBF that can use Coding Schemes CS‐1 and CS‐2.
Basic GPRS TCH (B‐TCH) A traffic channel, which in the packet switched domain is capable of carrying GPRS (CS‐1 and CS‐2) packet data and control signalling.
Basic Pattern A pattern of PDCHs in a PSET with the maximum number of PDCHs according to a type 2 MS GPRS multislot class.
Basic Physical Channel (BPC) A BPC is one timeslot occurring on every TDMA frame. With frequency hopping the frequency will change between every frame; without frequency hopping it will not. A BPC may be used to carry different channel combinations.
Basic Physical Channel (BPC)Basi ical A BPC is one timeslot using one set of frequencies occurring on every is lot ing of frequencies, ing TDMA frame in the digital air interface between the BTS and the MS. (With frequency hopping the frequency will change between TDMA frames, without frequency hopping a single frequency is used.)
Basic Ranking Ranking only according to signal strength.
Basic Ranking List Initial list of cells ranked only according to signal strength.
Basic SDCCH Configuration The number of SDCCH/8 assigned to the cell by command RLCCC or by system default.
Basic Transmission Time Interval (BTTI) An EGPRS and GPRS type of scheduling. A TBF in TTI mode BTTI will be scheduled over single PDCHs every 20 ms.
BCCH Extended To send a message on extended BCCH means to send it on CCCH.
BCCH Frequency Band The frequency band that the BCCH belongs to.
BCCH Message Distribution The sending of System Information messages 1, 7 and 8 can be switched on and off for BTSs following GSM Phase 2 TS.
BCCH Mode The BCCH mode indicates where SI 13 and SI 2 quater are sent: either on the normal or on the extended BCCH. Extended BCCH is used when the message does not fit into the normal BCCH.
Below S GSM neighbouring cells categorized below the serving cell in the candidate list.
Best Effort ABQP The best‐effort ABQP is used if the PFI indicates 'best‐effort', PFI=0, or if the PFI is undefined.
Better Cell A GSM cell ranked better than the serving cell in the basic ranking list.
Bi‐Directional Channel A channel in a multislot configuration used for downlink as well as uplink transmission.
Bi‐Directional Channel A channel used for downlink as well as uplink transmission in a HSCSD configuration.
Bi‐Directional Channel A channel used for downlink as well as uplink transmission. The channel combination for a bi‐directional channel is (ix), TCH/F + SACCH/M.
Bit Error Rate (BER) The number of erroneous bits received as a percentage of the total number of bits received in a time interval, usually one second.
Bit Period Duration of one information bit on the radio interface.
Blocking The equipment is taken out of service.
Blocking of BPCs with or without Forced Release Blocking of a BPC without forced release orders blocking, but it is not executed until the connections using the logical channels related to this BPC have been released. However blocking with forced release releases the connections immediately and then carries out the blocking.
Bmax Information element in the messages 48.018 FLOW‐CONTROL‐BVC, FLOW‐CONTROL‐MS and FLOW‐CONTROL‐PFC. The IE indicates the maximum amount of data that SGSN may expect the PCU to store for current cell, MS or PFC respectively, given in number of 100 octets.
Bothway Path A bothway path is the normal connection through the GS which, provides communication in both directions.
Broadcast Control Channel (BCCH) This channel is used for broadcast of general cell information, system information messages, to idle and active MSs.
BSC Band Operation Mode There are two different BSC band operation modes:
MULTI: The BSC multi band operation mode is enabled. The MSs have the possibility to use channels in more than one frequency band.
SINGLE: The BSC multi band operation mode is disabled. The MSs have the possibility to use channels in one frequency band only.
Signa ng
BSC Data BSC data is common for all the cells in the BSC. There is one set of BSC data for each system type (GSM 800, GSM 900, GSM 1800 and GSM 1900).
BSC/TRC Application Part (BTAP) The proprietary protocol used for signalling between the BSC and the TRC on the Ater interface.
BSS Release The Base Station System (BSS) Release is defined by its BSC version in combination with the most up to date BSS interworking supported by that BSC.
BSSGP Virtual Connection (BVC) An end‐to‐end communication path between BSSGP peer entities. There are two types:
Point to PointSignallinglli
There is one point to point BVC for every cell towards each SGSN.
All BSSGP messages which are not for delivery to a specific cell are sent on the signalling BVC. There is only one signalling BVC per BSC.
BSSGP Virtual Connection Identifier (BVCI) The identity of a BVC having end‐to‐end significance across the Gb interface. A BVCI is unique within a Network Service Entity. The BVCI together with the NSEI uniquely identifies a BVC within an SGSN.
BTS Condition A condition reported by a supervised entity in the BTS. The condition may indicate either a fault or a consequence of a fault.
suppor examp e GSM Phase 2 em n
BTS External Alarm (G12) A BTS external alarm is generated if an abnormal condition is detected in the BTS site. Examples of BTS external alarm situations are fire alarm, burglar alarm, abnormal temperature alarm and so on.
BTS External Class 1B Fault A fault external to the Transceiver Group that leads to a piece of BTS equipment not being able to carry out its operational function. This type of fault is classified as a fault affecting functionality.
BTS External Class 2B Fault A fault external to the Transceiver Group that does not interfere with the operation of BTS equipment. This type of fault is classified as a fault not affecting functionality.
BTS Functional Information BTS functional information refers to the functionality that the BTS supports for example GSM Phase 2 System Informationts, for l Syst I formation.
BTS Logical Model G12 Generation 1, Model 2. The RBS2000 and RBS6000 families of base stations supports this model.
BTS Operational State (G12) This state indicates whether a managed object is able to be used to its full capabilities. There are two BTS operational states, 'Operational' and 'Not Operational'. To be 'Operational' the managed object must be in global state OPER and, in case of an application object, it must also be configured and enabled i.e. it is able to be used for traffic.
BTS Reported Faults A BTS Reported Fault can be described using the following three attributes:
EXTERNAL. A fault is external to the BTS (BTS External). An example of an external fault is loss of synchronization with the transcoder.
Ad ration d Obj
1 OR 2. A fault is either class 1 or class 2. Class 1 means that MO is not able to carry out its operational function. Class 2 means that the MO can continue carrying out its operational function.A OR B. A fault is either class 'A' or class 'B'. Class 'A' means that the fault lies within the MO equipment itself. Class 'B' means that the fault is in the MO equipment's environment. Therefore, external faults can only be of Class 'B'.
BTS Software Package The set of all loadable software files or subfiles needed for a Transceiver Group (TG) or part of a TG. The BTS software package is comprised of header file and a number of operational software files.
BTS Software Version The file name of the BTS software package as defined by the function for Administration of Managed Objectsfor minist of Manage ects.
BTS State (G01) The state of the BTS‐MOI. The BTS state is defined for all managed object classes except transceiver group.
The BTS‐MOIs have the following states defined:
RESET. When a BTS‐MOI is in state reset all variable parameters are cleared or initiated to their default values. Loading of own software may take place.STARTED. The transceiver controller is started. Valid only for transceiver controllers. Loading of software buffers may take place. TGC state may be set to ACTIVE.DISABLED. Loading is not allowed. All other O&M procedures are possible. No traffic management is possible. Not valid for transceiver controller.
The red d tiona y means th serv its app s
ENABLED. Traffic management started. Some configuration data may be changed. Loading normally not allowed, the timing function is the only exception. Not valid for transceiver controller.
A BTS‐MOI can be ordered to change BTS state from the BSC or may automatically change state in a fault situation.
BTS State (G12) The state of the BTS‐MOI. The BTS state is defined for all managed object classes except transceiver group.
For service objects the following states are defined:
RESET. All variable parameters are cleared or initiated to their default values. Some supervision of the application object may not be active. The reduced functionality means that services to its application objects uce func lit at ices to lication object are absent.STARTED. All functions and hardware belonging to the service object are supervised. Loading is handled, with possible transfer of files allowed. Once the loading is finished, all application objects belonging to the service object may be connected.
For application objects, the following states are defined:
RESET. All variable parameters are cleared or initiated to their default values. Some supervision of the application object may not be active. Connection on Layer 3 is allowed if the service object to which the application object belongs is started and loaded.
DISABLED. All supervision is active. All O&M procedures are possible. No traffic management is possible.
ENABLED. All supervision is active. Traffic management is started. Some configuration data may be changed.
A BTS‐MOI can be ordered to change BTS state from the BSC or may automatically change state in a fault situation.
BTS Version BTS Version is used to reference BTS maintenance documents, for example interpret to fault maps and replacement units maps.
C/I The ratio between the carrier signal strength and the interference signal strength. The ratio is expressed in dB.
CALIM Accumulated CAL (Call Acceptance Limit) values during a period of the last five seconds. CALIM appears in the printout of the PLLDP command.
Call Acceptance Limit (CAL) Is calculated by the Processor Load Control function for the next one second period.
Call Initiation Time A timestamp when ASSIGNMENT REQUEST or the VGCS/VBS ASSIGNMENT REQUEST message is received or a timestamp when a spontaneous handover is started.
Call Supervision Call supervision comprises the parts of the functions, Assignment, Handover, Dynamic MS Power Control, Dynamic BTS Power Control and Connection Release, which supervise and maintain a good connection. It also proposes disconnection when necessary.
CALMAX This parameter sets the limit for the maximum number of tasks possible to be fetched by the CP per second.
EMG The sync on a TRI EM th the casca
CALMIN This parameter sets the limit for the minimum number of tasks to be fetched by the CP per second.
Candidate List This list is compiled by the locating procedure, and contains cells, selected and organized in priority order.
Capacity Hysteresis (CAPHYST) This hysteresis, relative to CAPLIM, is an area above CAPLIM restricting how low the free capacity of a TRH is allowed after LAPD links have been moved to it.
Capacity Limit (CAPLIM) The limit of how low the free capacity of a TRH is allowed before LAPD links ought to be moved from it. TRHs below this limit are considered to be overloaded.
Cascaded TRI‐EMG A TRI‐EMG that receives its control signalling link from another TRI‐EMG The synchronization to a TRI EM that is included in the cascaded. hronizati to ‐ at is included in ded TRI‐EMG may also be received from another TRI‐EMG link.
CCHPWR Maximum TX‐power an MS may use when accessing on a Common Control Channel.
CCN Mode The Cell Change Notification (CCN) mode is a mode for network assisted cell change. In this mode the MS proposes a cell reselection to the network, and the network assists the MS with the cell change.
Cell The word 'cell' is used as a synonym for 'serving cell' in this document. Otherwise, 'target cell' is used.
Cell Allocation A list of frequencies used within a cell.
Cell Data Cell data is data that can be defined per cell.
Cell Layer A hierarchical cell structure is defined per BSC. Depending on the optional feature parameters, HCS and HCSBAND, one, three or eight cell layers are supported.
Cell Level In the hierarchical cell structure there are three cell levels. The notation level 1 is used for the lowest ('micro') level, level 2 for the middle ('normal' or 'original') level and level 3 for the highest ('umbrella') level.
Cell Load Sharing Acceptance Level The percentage level of idle full rate capable TCHs above which a cell's traffic level must remain, if it is to accept handovers due to cell load sharing.
Cell Load Sharing Evaluations Locating evaluation where a set of reduced hysteresis values applies.
Cell Load Sharing Handover Acceptance Specifies whether handover due to cell load sharing is accepted by the cell or not.
Cell Load Sharing Level The percentage level of idle full rate capable TCHs at which or below which a cell's traffic will cause cell load sharing evaluations if the cell is active for cell load sharing.
Cell Load Sharing Ramping Time Specifies how quickly the hysteresis reduction value is ramped up from zero to the final value.
Cell Load Sharing State Specifies if a cell is active for cell load sharing or not.
Cell Load Sharing Time Interval The time interval specified by the operator which when expired initiates the checking of the level of idle full rate capable traffic channels for cells active for cell load sharing.
Cell Plan Defines the coverage and capacity that the system will offer in the radio network. It results in a number of sites, cells and radio channels required to give the subscribers the desired quality and grade of service.
Cell Reselection The procedure to choose the best cell after the initial cell selection while moving the GPRS MS in the network.
Cell State A cell can be in two states:
HALTED ‐ The cell is not in operation. All channel groups are in state HALTED.ACTIVE ‐ The cell is in operation. Some or all channel groups are in state ACTIVE.
Cell System Type Determines the frequency band, where the BCCH must reside in a cell.
Values: GSM 800, GSM 900, GSM 1800, GSM 1900.
Cell Translation Data Translation between cell pointer and cell global identity or UMTS Terrestrial Radio Access Network identity for each cell referenced in the recording.
Cell Type The Cell Type may be INTERNAL (the cell belongs to this BSC) or EXTERNAL (the cell belongs to another BSC or to another Radio Access Technology than GERAN).
pre era The va 'no pre erences' dica th any TCH cou
Central Functions (CF) A service object. It models all equipment in a base station infrastructure that are not part of other objects, for example, power supply, climate control and internal bus. It provides communication for the application objects IS, CON, DP and TF. It also handles maintenance of the CF itself. The CF is addressed by a Terminal Endpoint Identifier (TEI) in layer 2 signalling.
CGH Device An AXE device that handle translation of AMR encoded voice data received from the MS in an RTP stream into transcoder frames.
CHALLOC A preference parameter used at CS allocations. The value 'first' indicates that non hopping TCHs on the BCCH frequency are preferable. The value 'last' indicates that non hopping TCHs on the BCCH frequency are not preferable The value 'no preferences' indicates that any TCH could bef ble. lue f in tes at ld be allocated.
CHALLOC Is used in the channel allocation algorithm to determine if a non hopping TCH on the BCCH frequency shall be allocated first, last or with no preference.
Channel Activation Errors The following errors can occur during channel activation:
Error IndicationConnection Failure IndicationThe Time Alignment value is too largeThe number of received Measurement Reports is too smallBlocking of the channel
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Channel Allocation Profile A set of selection types where each type is connected to one resource type priority list. The channel allocation profile is used at channel allocation for CS connections. Each cell is connected to a channel allocation profile. /------\ /-------\/------\ | /----->-------->RTPL1|RT...RT|| | | | | |- - -|| | | /-+--------\ | RTPL2| || | | /--------+-\ | | |- - -|| | | | ST | | | | .| || | | | ST | | | | | || | | | ST ->-/ | /-+->-/ .| || | | | ST | | | | || | | | . | | | .| || | | | | | | | . | | | | . | ->-/ | | || | | | . | | | || | | | . | | | || | | | ST | | | || +--/---->| +------/ | || |. /-->\----------/ \-------/\------/-->-/ CHAP RTPL List CELL
CHAP Channel Allocation Profile RT Resource Type RTPL Resource Type Priority List ST Selection Type
Channel Band Channel band is valid for channels in GSM 900 cells and has values P or E.
For non‐hopping channels, if the Absolute Radio Frequency Channel Number (ARFCN) is in P‐GSM band, the channel is marked as P. If ARFCN is in G1‐GSM band, the channel is marked as E.
For hopping channels, if a channel contains at least one ARFCN in G1‐GSM band, the channel is marked as E. If all ARFCNs are in P‐GSM band, the channel is marked as P.
Channel Codec Unit (CCU) A logical entity within the BTS which is responsible for two lower protocol layers ‐ the RF layer and the GPRS Physical Link Layer.
Channel Coding The process of adding extra bits to a data block to enable forward error detection and correction.
Channel Combination GSM channel combinations can be related to the internal BPC combinations as follows:GSM Channel CombinationTCH/F+FACCH/F+SACCH/FTCH/H+FACCH/H+SACCH/HFCCH+SCH+BCCH+CCCHBCCH+CCCHFCCH+SCH+BCCH+CCCH+SDCCH/4(0..3)+SACCH/C4(0..3)FCCH+SCH+BCCH+CCCH+SDCCH/4(0,1,3)+SACCH/C4(0..3)+CBCHSDCCH/8(0..7)
Channel Frequency Band Channel frequency band is determined from the frequencies a channel is using. The following values are applicable for channel frequency band:
GSM 800. The channel is only using frequencies in the GSM 800 band.
E‐GSM 900. The channel is using at least one frequency in the G1‐GSM 900 band.P‐GSM 900. The channel is only using frequencies in the P‐GSM 900 bandband.GSM 1800. The channel is only using frequencies in the GSM 1800 band.
GSM 1900. The channel is only using frequencies in the GSM 1900 band.
Channel Group A channel group is a group of frequencies within one cell. The same frequency may be in more than one channel group per cell, excluding the BCCH frequency. Channel groups are operator controlled and facilitate control over groups of frequencies in a cell. Channel groups are identified by a local channel group number per cell. Channel group 0 contains the BCCH and is defined automatically at cell definition.
Channel Group A group of frequencies within a cell. A frequency belongs to just one channel group in a cell. Channel group 0 contains the BCCH and is defined automatically at cell definition.
Channel The annel mo the mo h a annel use (th t
Channel Group Channel groups are operator controlled and facilitate control over groups of frequencies in a cell. Channel groups are identified by a local channel group number per cell. Channel Group 0 contains the BCCH and is automatically defined at cell definition.
Channel Group State There are two different channel group states:
HALTED: The channel group is not in operation. No channels within the channel group are available.ACTIVE: The channel group is in operation, that is, available for traffic.
Channel Mode Mode The channel mode describes the mode in which a channel is used (that ch de describes de in whic ch is d a is, speech, data or signalling).
Channel Priority The priority associated with a BPC. Channel priority determines which channel combinations should be provided when insufficient BTS equipment is available to support the required number of BPCs.
Channel Rate The available transmission bandwidth of speech or data on a TCH: Full Rate (FR) or Half Rate (HR).
Channel Rate The available transmission bandwidth on a traffic channel for speech or data. Channel rate can be Full Rate (FR) or Half Rate (HR).
Channel Rate and Speech Versions FULL RATE with Speech Version 1, 2, 3, and 5.
Speech Version 1: Full Rate.
vers
Speech Version 2: Enhanced Full Rate.
Speech Version 3: AMR‐NB.
Speech Version 5: AMR‐WB.
HALF RATE with Speech Version 1 and 3.
Speech Version 1: Half Rate.
Speech Version 3: AMR‐NB.
Channel Service A service provided for a call on a TCH or an SDCCH. A channel service is a combination of channel mode, channel rate, channel type and speech versionion.
Channel Service The combination of a channel rate and a speech version.
Channel Service The service provided for a call on a TCH or an SDCCH. The Channel Service is a combination of Channel Mode, Channel Type, Channel Rate, Speech Version and Data Transparency Indicator.
Channel Service Preference A list of preferred Channel Services. The list is sorted in preferred order.
Channel Type Channel type is the type of logical channel: SDCCH, TCH, BCCH or CBCH.
Circuit Identity Code (CIC) Defines a unique 64 kbps connection on the A‐Interface between an MSC and a TRC node, or on the Ater‐Interface between a TRC and a BSC node.
Circuit Switched Domain (CSD) The domain where circuit switched traffic is handled.
Class 1A Fault A fault in a piece of BTS equipment itself that leads to it not being able to carry out its operational function. This type of fault is classified as an internal Fault affecting functionality.
Class 1B Fault A fault not in a piece of BTS equipment itself but in its environment that leads to it not being able to carry out its operational function. This type of fault is classified as an internal Fault affecting functionality.
Class 2A Fault A fault occurring in BTS equipment itself that does not directly interfere with its operation. This type of fault is classified as an internal Fault not affecting functionality.
Class B MS An MS which can switch automatically between circuit and packet switched mode; it may be in only one mode at a time.
Co‐Sited Indication that the neighbouring cell is co‐sited with the serving cell, that is the two cells share a common radio base site.
Co‐TSC Interference Co‐TSC interference occurs when a wanted transmission burst has the same TSC as an interfering transmission burst. This degrades the ability of the operator to extract the correct TSC from the wanted burst.
pre erred call ti Whenever a call se th cell
Codec The software in the transcoder that codes and decodes speech is sometimes called codec. The decoded speech is in the form of a 64 kbps bitstream. The coded (and compressed) speech is divided into 20 ms long timeslots and is used between the transcoder and the MS. The compressed speech can be coded with different channel rates and speech versions. The most effective combination of these depends on the quality of the transmission.
Codec Mode A codec rate used within a codec set.
Codec Rate The bitrate of the coded speech after the speech encoding, for example 12.2 kbps and 6.7 kbps.
Codec Restriction A cell may be configured so that an operator‐selected codec will be preferred for call allocation Whenever a call is setup within that cellf for alloca on. is tup within at , the BSC will attempt to use the selected codec before trying any other codecs. If it is not possible to allocate on that codec (for example, due to a lack of transcoder resources or because the MS does not support that codec) then allocation on other codecs will be attempted.
Codec Set A set of up to 4 different codec modes (using the same channel rate). For example, 12.2, 7.40, 5.90, and 4.75 kbps for a full rate channel.
Codec Type A Codec type is a combination of a channel rate and a speech version.
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Coding Scheme (CS) An error detection and correction method used to reduce Bit Error Rate. There are four coding schemes defined for GPRS (CS‐1 to CS‐4). The length of the RLC/MAC block varies with the coding scheme used. Control blocks are always transmitted using CS‐1. The modulation method that is used for all four coding schemes is Gaussian Minimum Shift Keying (GMSK).
Combined BSC/TRC A BSC and a TRC combined in the same physical node.
Combined EGPRS Supplementary/Polling Field (CES/P) CES/P is a field in the header of a downlink EGPRS RLC/MAC block for an MS in FANR mode. It is used to specify when an MS shall transmit control blocks and what fields the requested uplink block shall contain.
Combined Normal and Extended Range Cell An extended range cell with a subcell structure. The underlaid subcell has extended range while the overlaid subcell has normal rangehas tended whil la bcell has l range.
Command Characters Characters entered in the command when entering the text, MML or HEX.
Compressed Speech Speech coded with one of the following speech codecs:.
Full Rate (FR)Half Rate (HR)Enhanced Full Rate (EFR)AMR FRAMR HRAMR‐WB
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Concentrated LAPD Link The concentrated LAPD link is a LAPD link between a Base Station Controller (BSC) and a LAPD concentrator and is used for transferring messages to and from several transceivers (TRXs).
Concentration Factor A concentration factor N:1 means that there are N non concentrated LAPD links connected to one concentrated LAPD link.
Concurrent TBF A new TBF in the opposite direction (DL or UL) from an already existing TBF for the same MS.
Configuration This is the process of taking a cell configuration specification and mapping it to equipment in the BTS.
The process applied to a channel group It consists of configuring lie to ch group. ists of figuring equipment, and adding or removing BPCs.
Configuration Method A TG level parameter which determines the strategy used to perform a configuration, as well as how HFS extension is handled. There are four options:
NODEL ‐ A cell can be HFS expanded when halting and reactivating the cell or on a change of frequency.CMD ‐ HFS extension can be initiated by operator command, or automatically at a predefined time.MINDIST ‐ If configuration changes require BPCs to be deleted and re‐created, then no hopping group will be configured until the previous hopping group has completed configuration. An attempt will be made to handover any call in progress. HFS extension will be carried out automatically as equipment becomes available.
BTS t c ng not ar d yet
FASTREC ‐ HFS extension will be carried out automatically as equipment becomes available. Configuration of a hopping group will not wait for completion of the previous hopping group.
Configuration of BTS Equipment This is the process of sending the required configuration data to the BTS equipment.
Configuration State (G01) The configuration state of the managed object in the BSC can have following values:
UNCONF ‐ Unconfigured. All necessary data for traffic handling is not stored in logical unit in the BTS.CONF ‐ Configured. All necessary data for traffic handling is stored in the BTS but traffic handling is not started yet, bu traffi handli is st te .ENABLED ‐ Enabled. The logical unit is fully functional in a traffic sense.
Configuration State (G12) The configuration state of the application object in the BSC can have following values:
UNCONF ‐ Unconfigured. All necessary data for traffic handling is not stored in application object in the BTS.CONF ‐ Configured. All necessary data for traffic handling is stored in the application object in the BTS, but traffic handling is not started yet. Note: The MOs IS and CON are exceptions, see Managed Object Specific Properties.ENABLED ‐ Enabled. The application object is fully functional in a traffic sense.
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Connection Reference A reference to be used in order to relate data records to a certain connection.
Consecutive Voice Group Talker A Consecutive Voice Group Talker will be set up during a Voice Group Call if an MS belonging to the Voice Group Call has requested to become the Voice Group Talker. Prerequisites for the request is that the Voice Group Talker resources are indicated to be free. This procedure can be repeated during the lifetime of the Voice Group Call.
Contention Resolution The contention resolution procedure is used to uniquely identify MSs during MS originated access procedures. The procedure is completed in the network at reception of the MS TLLI and PFI.
Control ActivityCont Ac vity A CA is assigned to control functions in TAS which can take a lock on a is i d to t func in whic take lock Managed Object.
Each CA is given a priority which determines which other control functions it can interrupt and visa versa. The data connected to a CA determines for which Managed Object states the function is valid and what actions should be taken when the associated control function releases the Managed Object lock.
Control Interval At the end of each control interval, the number of calls to be accepted in the following control interval is calculated.
Control Signalling Link (CSL) A signalling link that is intended for control of an EMG from the parent exchange.
k (CN) The k cons an MSC or an SGSN or th and a
The control signalling link consists of a 64 kbps data link with signalling terminals connected at both ends. Timeslot number 16 on a PCM line is reserved for the control signalling link.
Conversational Class Used by applications having strong absolute requirements on bitrate or delay, or both. A typical application is voice.
Coordination Level There are two levels of coordination. The default level is the managed object level where the alarm situation for a managed object is issued as an alarm. The other level is the transceiver group level.
Here only the highest alarm situation of all managed objects in the transceiver group is issued.
Core Network (CN)Core Networ The Core Network consists of an MSC or an SGSN or both and a Core Networ ists of , , bo , number of supporting nodes. The Core Network is connected to one or more PLMN operators. Note that both MSCs and SGSNs can be placed in a pool. If that is the case, then it is possible to have more than one MSC or SGSN in the Core Network.
Core Network Identity (CNID) The CNID value is assigned to a specific MSC allowing unique MSC identification. One CNID must be assigned to each MSC serving in the Pool.
Counter Types There are three types of counters:
ID – Object identifier used by some object types.PC – Peg counter, shows the accumulated number of events or the accumulated value of a counter. A peg counter can only be incremented.
ST – Status counter, shows the counter value at a specific moment (that is a snapshot). A status counter can be incremented and decremented.
CPICH Ec/No Measurement quantity for UTRAN cells.
CS Paging PACCH A part of the logical channel PACCH, but with higher priority.
CS Traffic Frame A CS traffic frame is an HDLC frame containing both CS speech traffic (SAPI 10) or CS data traffic (SAPI 11).
CTR Administrative Data Exchange identity,
Cell identity,
Date,
Time (hour, minute, second, decisecond),
File format revision information,
Recording type,
Recording area,
Triggering event,
Time window,
Duration time.
CTR Event Cell access (5),
BSC ll over ilure (2)
Establish indication (2),
Assignment command (1),
Assignment complete (2),
Assignment failure (2),
Assignment failure to MSC (3),
Intra BSC, Inter Cell handover command (1),
Intra BSC, Inter Cell handover complete (2),
Intra BSC Inter Cell handover failure (2)Intra , Inter Ce hand fa ,
Inter BSC handover required (3),
Inter BSC handover command (1),
Inter BSC handover complete (2),
Inter BSC handover failure (2),
Intra BSC, Inter Cell handover command during assignment (1),
Intra BSC, Inter Cell handover complete during assignment (2),
Intra BSC, Inter Cell handover failure during assignment (2),
Inter BSC handover required during assignment (3),
Inter BSC handover command during assignment (1),
Inter BSC handover complete during assignment (2),
Inter BSC handover failure during assignment (2),
Intra BSC, Intra Cell handover assignment command (1),
Intra BSC, Intra Cell handover assignment complete (2),
Intra BSC, Intra Cell handover assignment failure (2),
Connection reference for previous BSCConnec ference for ious ,
High handover rate indicator.
Data Link The BSC sends and receives data, to and from terminal equipment at the BTS, via data links. Each data link is identified by a TEI/SAPI pair, which is unique on a physical connection. Each physical connection can support a number of data links.
Data Link Connection Identifier (DLCI) An identifier of a PVC in a frame relay network.
Data Link Type According to 3GPP TS 48.052, three data link types, corresponding to three SAPI values are supported.
RSL: Radio Signalling Link. Serves the Traffic Management Procedures of layer 3.
OML: Operation and Maintenance Link. Serves the Network Management Procedures of layer 3.
L2ML: Layer 2 Management Link. Serves the L2 Management Procedures. Used for management of the data links sharing a physical connection.
Day Categories A day category is used to define a time schedule. There are 10 categories, 0 ‐ 9.
Some examples of day categories are as follows:
DCAT 0 ‐ ordinary working dayDCAT 1 ‐ day before holidayDCAT 2 ‐ holiday
DB Measurement Database in STS. The counters are collected from the BSC.
DCA Criterion Differential Channel Allocation criterion. The DCA criterion is fulfilled either when the MS is a classmark 5 mobile or the call has Priority Level 9 (chosen by command), provided that the call is not an emergency call.
Deci Transformed Quality Unit (DTQU) Quality unit according to 3GPP TS 45.008 multiplied by 10.
Deconfiguring BTS Equipment The process of removing configuration parameters from BTS equipment so the equipment will not interfere with configured equipment.
Dedicated Channel A TCH or an SDCCH is a dedicated channel.
Dedicated Mode The MS has an established circuit switched connection on a TCH or on an SDCCH.
Dedicated PDCH A PDCH permanently allocated in a cell by operator command.
Default ABQP The default ABQP is used when a download PFC request has been sent to the SGSN but the ABQP for the PFC is yet unknown.
Defined Neighbouring Cell The cells on which a mobile station receives measurement reports, and the BSC allows handover to, are known as defined neighbouring cells.
Delayed Release Mode A TBF in delayed release mode is a TBF that is not released due to the delayed release procedure.
Delayed Release Procedure A procedure which delays the release of a downlink TBF when the transfer of downlink data packets has ended.
Demultiplexed Device (DEMUX) A 64 kbps device, carrying one traffic channel. It is used to connect traffic channels to the MSC via a Radio transmission and Transport Subsystem A‐interface Line Terminal (RALT).
Destination Point Code Gives the number of the destination point, that is, the identity of the connected node.
Device An entity that can be connected to an SNT, carrying 64 kbps information to and from the Group Switch.
Device Group A group of devices on a transcoder board, which can be independently configured to operate with a specific channel rate and speech version combination.
Device Processor The term 'Device processor' is used to designate the processor part of a processor controlled device. Though the device consists of many physical processors, it can be considered to have only one logical DP.
Device Processor Owning Block The term 'Device processor owning block' is used to designate a function block in control of a device processor.
Device Processor Software Unit Device processor software unit is used to designate the software unit handled by the device processor loading function, that is, the software to be loaded into the device processors.
Device Software Unit Designates the software unit handled by the TRA‐EM loading function, that is, the software to be loaded into the TRABs.
DFO File Direct File Output File ‐ A file defined for the Direct File Output Function in the IOG. It is defined as a device file with a datalink as device.
Differential Channel Allocation Used for differentiation of channel access based upon the priority level for the connection.
Differentiated Services (DiffServ) Code Point (DSCP) A DSCP is a marker in the header of each IP packet that prompts network routers to apply differentiated grades of service to various packet streams. DSCP is documented in RFC 2472.
Digital Connection Point (DCP) The termination point of a 64 kbps PCM timeslot in the interface switch.
over the Abi O&M Th gna ng d d us managed
Digital Connection Point (DCP) (G12) The termination point of a 64 kbps PCM timeslot in the interface switch. In the event that subrate switching is used, a DCP can be considered as being 4 sub‐DCPs, or ICPs (IS Connection Points), which can be switched independently to different destinations; traffic or signalling or both.
Digital Link (DL) Either a 2 Mbps link (DL2), a 34 Mbps link (DL3) or a higher capacity backplane interface (DL34). An ET155 is connected to a switch via DL3 interfaces. DL3 can handle 16*2 Mbps DIPs. ET155‐1 is connected to the group switch via DL34 interfaces.
Digital Path (DP) (G12) An application object. Layer 1 reception and transmission are not part of the BTS logical model. However, each of the PCM systems terminating in TG has an associated supervision object, the DP. Reports on transmission faults and supervision of transmission quality are carried over the Abis O&M interface That signalling is described using managed s interface. at si lli is escribe ing object DP.
A DP instance contains all parameter settings, counters to monitor the PCM link. It also performs procedures to report detected alarm conditions and quality values to BSC.
Digital Signal Processor (DSP) A speech processing device on the transcoder board.
Direct Encoding 2 A format to describe and convey frequency information by stating the frequencies instead of referring to the Cell Allocation (CA) that is broadcast in the cell.
Discontinuous Transmission (DTX) Discontinuous Transmission is a mechanism which allows the radio transmitter to be switched off during speech or data (non‐transparent) pauses. DTX can be on the uplink or the downlink.
Distance to Cell Border Criteria used at subcell change evaluations, meaning that signal strength from neighbouring cells are considered.
Distribution Delay ‐ on External Timing Bus The delay on the external timing bus between the Master and the Slave. There can be different delays for each TG Slave. Elements that affect this delay are:
DL_UNITDATA Downlink Unit Data ‐ A message, containing an LLC‐PDU and control data, which is received from the SGSN.
Downlink Line Speech Level The reference level of a speech signal from a BSC/TRC towards the BTS.
Download The transfer of software from the BSC to one or more specified Managed Objects on the BTS. The downloaded software is stored in BTS flash memory but is not run on the BTS. The BTS will continue to run its original software until an upgrade is performed.
DSP Channel Term used for a PDCH when it is handled by the physical layer in the DSP.
DTM Ranking Value A ranking value that gives an indication of how well a set of consecutive TCHs fulfils the allocation request for a DTM connection. The DTM rank value is used in order to find the best set.
the G1 GSM 900
DTXU Uplink DTX indicator.
Dual Band The ability to access both GSM 900 and GSM 1800 band.
Dual Transfer Mode (DTM) An MS is in Dual Transfer Mode when it has been assigned a CS channel and a PS channel in order to use them simultaneously.
Dynamic Allocation (DA) A MAC mode where an MS, when it detects its assigned USF value, is scheduled to transmit uplink on the current PDCH.
E‐GSM 900 Band The extended (E) GSM 900 band consists of the P‐GSM 900 and G1‐GSM 900 band.
E‐GSM 900 Channel A channel where the ARFCN is in the G1 band for non‐hopping channels. For hopping channels, the channel must contain at least one ARFCN in the G1 GSM 900 band ‐ band.
E‐GSM Mobile A Mobile Station that within the GSM 900 bands can be assigned to P‐GSM channels and E‐GSM channels.
E‐OTD A positioning method where the MS and a LMU measures the relative time of arrival of the signals from several BTSs. The purpose of the LMU is to relate the transmitted frames of different BTSs to a common time reference (GPS time). The MS measures the time of arrival of signals from three BTSs and the measurements are then used for the triangulation needed to produce the location of the MS.
E‐UTRAN BA List An E‐UTRAN BCCH Allocation list provides the EARFCNs to be monitored by the MSs in the cell.
E1 European Digital transmission format devised by ITU‐T. E1 signal format carries data at a rate of 2.048 Mbps and can carry 32 channels of 64 kbps.
Effective Radiated Power (ERP) The power in a reference point in the BTS.
Effective Streaming PDCH Each streaming TBF has at least one PDCH where the TBF's streaming data is scheduled with QoS priority streaming. Such PDCHs are called the TBF's effective streaming PDCHs. For Guaranteed Bitrate calculation only the effective streaming PDCHs are considered.
EGPRS PDCH (E‐PDCH) A logical channel used for the transfer of EGPRS (MCS‐1 to MCS‐9) and GPRS (CS‐1 to CS‐4) packet data and control signalling. An E‐PDCH uses a 64 kbps Abis link.
EGPRS Supplementary/Polling Field (ES/P) ES/P is a field in the header of a downlink EGPRS RLC/MAC block, which is used to specify if the RRBP is valid and what fields he next uplink control block shall contain.
EGPRS TBF (E‐TBF) A TBF that can use Modulation and Coding Schemes MCS‐1 to MCS‐9.
EGPRS TCH (E‐TCH) A traffic channel, which in the packet switched domain is capable of carrying EGPRS (MCS‐1 to MCS‐9) and GPRS (CS‐1 to CS‐4) packet data and control signalling.
EGPRS TRX (E‐TRX) A transceiver with the distinguishing properties as follows:
It has been upgraded to include 8 DCP connections.It is capable of supporting the EGPRS modulation and coding schemes.
EGPRS cod d bloc a ange EGPRS EPRS2 A
It is capable of supporting the 3GPP TS 44.060 EGPRS PACKET CHANNEL REQUEST Message.
EGPRS2‐A PDCH (E2A‐PDCH) A logical channel used for the transfer of EGPRS2‐A (DAS‐5 to DAS‐12 DL and UAS‐7 to UAS‐11 UL), EGPRS (MCS‐1 to MCS‐9) and GPRS (CS‐1 to CS‐4) packet data and control signalling. An E2A‐PDCH uses a 64 kbps Abis link.
EGPRS2‐A TBF (E2A‐TBF) A TBF that can use Modulation and Coding Schemes DAS‐5 to DAS‐12 in downlink and UAS‐7 to UAS‐11 in uplink. Additionally MCS‐1 to MCS‐4 are included in EGPRS2‐A in downlink and MCS‐1 to MCS‐6 in uplink. MCS‐7 and MCS‐8 are also included in EGPRS2‐A downlink to be used when either the USF or the downlink PAN, or both are addressed to an EGPRS Mobile Station. MCS‐6 to MCS‐8 may be used for retransmission of EGPRS coded blocks after a change from EGPRS to EPRS2 A has beenof e ks after ch from to ‐ has been made for a downlink TBF.
EGPRS2‐A TCH (E2A‐TCH) A traffic channel, which in the packet switched domain is capable of carrying EGPRS2‐A, EGPRS and CS‐1 to CS‐4 packet data.
EGPRS2‐A TRX (E2A‐TRX) A transceiver with the distinguishing properties to support the EGPRS2‐A modulation and coding schemes.
EIT PFC A PFC that is used for EIT. A PFC is identified as EIT if there is support for EIT and the demands on Transfer Delay are high (Transfer Delay in ABQP shall be less than or equal to 800 ms).
EIT TBF A TBF with an active PFC with QoS priority EIT as the highest priority PFC.
Gl (EDGE) on GSM It uses different mo tion (16/32 QAM 8 PSK or
Elementary Procedure An initial message and its response. An elementary procedure concerns only one Managed Object.
Emergency Level The priority level to be used for emergency calls at immediate assignment.
Encryption Alternative The encryption alternatives comprises the algorithms A5/1, A5/2 and A5/3, as defined by GSM, and also "no encryption".
Engineered Capacity The maximal offered load at which the exchange fulfils all its grade of service requirements. Engineered capacity is usually expressed in calls/s. This is according to standard Q.543. Also often defined as the traffic level when the switch begins to reject jobs.
Enhanced Data for Global Evolution (EDGE)Enhanced Data for obal Evolution An add on to GSM It uses different modulation (16/32 QAM 8 PSK orAn add‐ to . dula , ‐ GMSK) and coding schemes. This allows greater user data throughput and thus provides greater spectral efficiency.
Enhanced Flexible Timeslot Assignment (EFTA) An EGPRS functionality that makes it possible for EFTA capable MSs to be reserved in both directions on the maximum number of timeslots according to the multislot class, regardless of the sum of reserved uplink and downlink timeslots. This means that the network has the possibility to allocate one and the same MS uplink and downlink PDCH resources that overlap in time. The use of that possibility is called overscheduling. Overscheduling results in a higher use of timeslots, an increased throughput, and a better end‐user performance. Note that because of the overscheduling, an MS that is busy sending UL blocks may be unable to read some DL blocks that are sent at the same time. Such blocks need to be resent.
Enhanced GPRS (EGPRS) An enhanced GPRS service including support for EDGE, Link Adaptation and Incremental Redundancy.
Equipment Protection 1:1 The equipment is protected by a standby unit. This means that in the case of an equipment fault, it is possible to switch the traffic to a standby unit.
Ericsson Instant Talk (EIT) A Voice‐over‐IP application that offers “push button” voice communication between users in a one‐to‐one or one‐to‐many fashion. EIT is working in half‐duplex mode with streaming traffic both downlink and uplink. The delay requirements are less stringent than for ordinary speech but stronger than for streaming of video and audio clips.
Errored Second A one second period with one of more errored blocks.
ESIGA ESIGA is a suite of blocks used to send PLEX signals between a non‐CP and a CP environment.
ESIGA consists of two parts.
The first is a PLEX block‐group which deals with sending information from an AXE over TCP/IP, as well as allowing the operator to administer the TCP/IP link at the AXE.
The second consists of an ATS Server and ESIGA Client (an API and client software package) running on a platform external to the AXE, which allows a developer to create applications that can communicate with an AXE over TCP/IP.
The information that is sent/received can be in the form of PLEX signalling. Also, it is possible to stream the dynamic buffer of MDATA out over the link.
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Essential Channel An Essential Channel is a channel that the multislot (HSCSD) connection cannot survive without, according to the MSC requirements and the MS Multislot Class. For a flexible HSCSD connection the main channel is an essential channel and for a fixed HSCSD connection all the channels are essential.
Essential PDCH A PDCH that carries Timing Advance Information and therefore cannot be removed from a TBF without ending the TBF.
Establish Indication The ESTABLISH INDICATION message can contain one of the following initial MS messages:
Established Uplink TBF An uplink TBF is considered established when the MS has started to send data uplink and at least one RLC data block has been received by the BSC.
Ethernet Bus Ethernet is the standard for Local Area Network (LAN) technology specified in a standard IEEE 802.3. It connects a group of RPs.
Ethernet Group A group of RPs interconnected by an Ethernet bus.
Ethernet Status Working or Not Working. When the Ethernet status is working, all RPs in the Ethernet group can communicate with each other. When the Ethernet status is Not Working, there is a maximum of one active RP in the PCU.
Event Consumer An external processing unit, which is a client to a specific Event Proxy, connected to the BSC via TCP/IP. It collects and interprets the Event Notifications supplied by the BSC.
Event Feature An Event Feature affects the content of at least one Event Notification. The use of an Event Feature is controlled by an Event Consumer performing activations and deactivations for the Event Feature.
The following Event Features are available:
Find Faulty Antenna Data (FFAD)Find Faulty Transmit Antenna Data (FFTAD)
Event Feature Activation Event Feature specific data requested by the Event Consumer after performed approval of the authorization of the Event Feature by the BSC.
An Event Feature Activation is narrowed by using a cell filter.
Event Generator A software unit in the BSC, that generates an event.
Event Identifier (EID) A number that uniquely defines the type of a specific Event Notification per Event Consumer.
Event Notification An event occurrence in the network that is forwarded in a known format to an Event Consumer.
Idl Thres Hi thres expressed as a percen idl resources the
Event Proxy (EP) A software unit in the BSC that handles the communication with a specific Event Consumer.
Event Server A software unit in the BSC that handles the communication between an Event Proxy and corresponding Event Generators.
Event Subscription Event Notification requested by the Event Consumer after performed approval of the authentication of the Event Consumer by the BSC.
An Event Subscription can be narrowed using a filter which depends on the event type: per EID, per cell, per TLLI, per IMSI and per IMEI.
Excess Idle ThresholdExcess e hold High threshold expressed as a percentage of idle resources in thegh hold tage of e in transcoder pool. Above this threshold, the transcoder pool is a candidate for surrendering resources for reconfiguration to another transcoder pool.
Exchange Data Data common for the exchange, that is, Destination Point Code and Network Indicator.
Exchange Input Load The total number of traffic jobs per time unit offered to the exchange. The term offered means requests for processor capacity to the Processor Load Control function.
Exchange Property Exchange property refers to the changeable exchange parameters of functions in the BSC exchange that can be set by this function. An exchange property parameter is expressed as an identifier indicating the property designation with a numerical value.
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The handling of the BSC exchange properties depends on the parameter type. The type is either mandatory or optional. If the type is mandatory the value of the parameter shall be set with the change command. If the type is optional a default value is used as a preset value. However, a new value can be set with the change command. Only one value is allowed for a property in the BSC.
Extended Dynamic Allocation (EDA) A MAC mode where an MS, when it detects its assigned USF value, is scheduled to transmit uplink on the current PDCH and all PDCHs assigned uplink with higher timeslot numbers.
Extended Languages Extended languages are those ones which belong to Universal Multiple‐Octet Coded Character set, including Arabian, Bengali, Chinese, Gujarati, Hebrew, Japanese, Kannada, Korean, Malayalam, Oriya, Tamil, Telugu, Thai and Tibetanai etan.
Extended Range Cell Can support traffic for MSs at a distance greater than 35 km from the BTS. In an extended range cell every second TS is unavailable. This is needed because the reception in the BTS may spill over into the next TS. The MS is unaware of the extended range cell, that is, the MS does not suffer from the “late” reception.
Extended Registration Check An HSN service that allows a more sophisticated logic being executed at MS registration than what is possible in the HBSC.
Extension Module (EM) The extension module is a general hardware unit. The hardware in the extension module is controllable from the central processor in the parent exchange. A special distributed processor may be included in the extension module with the purpose to relieve the central processor in the parent exchange.
cause n the CHANNEL REQUIRED message out
Extension Module Group (EMG) The extension module group is a group of EMs that is placed remote from the parent exchange. The EMG is controlled from the parent exchange with a single or a duplicated control signalling link.
External Cell A cell controlled by another BSC or another Radio Access Technology than GERAN, for example, GAN or UTRAN, but known to the BSC in question so handover can be made to and from that cell.
External Processor (XP) An external processing unit connected to the BSC. It collects and interprets the event data supplied by the BSC.
False Random Access This means that the access delay information or the establishment cause information in the CHANNEL REQUIRED message is out of range i formation in is of range.
Far End Outgoing direction.
Fast ACK/NACK Reporting (FANR) FANR is a method to get fast replies to poll requests by either using the CES/P field or the ES/P field together with the RRBP field in the RLC/MAC header. In FANR mode all downlink blocks with MCS coding schemes use the CES/P field for polls, CS‐1 blocks use the ES/P and RRBP fields for polls. The scheduling of data for a TBF in FANR mode can be started one radio block earlier after TBF setup and TBF reconfiguration compared to when not in FANR mode.
Faster Recovery A method of configuring BPCs within a cell such that the cell is recovered as quickly as possible at the expense of reduction in capacity and service within the cell during a re‐configuration.
Class 1B
Fault Indication on a Logical Channel Message ERROR INDICATION or CONNECTION FAILURE INDICATION or some event in the BSC regarding the channel that requires a release of the connection.
Fault Log A memory area in the BSC for storing fault information from the BTS.
Fault Map A generic term describing a class of data elements reported over the Abis O&M Interface and specified in relevant Abis IWD descriptions. A bitmap reported on an MO where each bit, if set indicates a BTS Condition present on that MO.
The following fault maps are reported:
Internal Fault Map Class 1AInternal Fault Map Class 1BInternal Fault Map Internal Fault Map Class 2AExternal Condition Map Class 1External Condition Map Class 2External Condition Map Class 2 Extension
Fault Report A message received from an MO in the BTS indicating the fault and status information held by that Managed Object. A fault report is initiated when there is a change in fault or status information.
Fetch Interval At the end of each fetch interval a number of capacity requests are fetched from the buffers and for those requests processing capacity is granted.
mean d dica d
Fetched Traffic Jobs Fetched traffic jobs, incoming or originating, are the accepted traffic jobs, that is, jobs for which processing capacity is granted.
First MS The first MS is the only MS in an inactive VAMOS pair.
Fixed HSCSD Connection For a fixed HSCSD connection the user data rate must be established. Neither the data rate, nor the number of channels may be changed, unless a new requirement is received from the MSC.
Fixed PDCH Addition Timer (FAT) Used to start a new attempt to add GPRS dedicated or GPRS semi‐dedicated channels in a cell when the number of GPRS dedicated or GPRS semi‐dedicated channels in the cell is less than the current primary and secondary dedicated PSETs can support. Note: Fixed is still used meaning dedicateding e te .
Fixed Traffic Link The path through the group switch is set up semipermanently between the transmission device and the transcoder device.
Fixed Transcoder A fixed transcoder is a transcoder which has a semipermanent connection between the RBLT and the MUX device.
Fixed TX Address TX address associated with TX MO in a fixed way so no TX recovery and moving of the same TX address to another TX is possible. TX address is obtained from TRXC index.
Flash Memory A secondary store in the BTS where SW files are initially stored.
Flexible Abis An Abis path is connected to a specific channel at channel activation instead of at channel configuration. When the channel is deactivated the Abis path is returned to one of the Abis path pools, 16 or 64 kbps, and is once again free to be used with another channel within the same TG (Transceiver Group).
Flexible HSCSD Connection For a flexible HSCSD connection the user data rate and number of channels are flexible.
Flexibly Allocated Abis Path An Abis Path that is allocated to a TCH at channel activation and released at channel release.
Frame Number Offset Frame Number (FN) Offset. Indicates the time difference from the FN generator in the BTS expressed as a number of TDMA frames.
Frame Relay A switched data link protocol which handles multiple virtual connections.
Frame Synchronisation Holdover Period The period an internal RBS timing source can keep its frequency or phase within the system requirements when the external synch source (that is, GPS) is lost.
Frame Synchronised Radio Network A radio network in which all participating RBS start to transmit (and expect to receive) TDMA frames with a known Frame Number at the same instant in time. Adjacent RBSs may use the same frequencies, as long as they do not transmit on them at the same time.
Free TRH Capacity Free TRH capacity is the capacity of the TRH which is not used.
annel
Frequency Band Frequencies that belong to the same set of frequencies in a certain value range. Possible values are GSM 800, GSM 900, GSM 1800 and GSM 1900.
Frequency Hopping Data Data used for identification of used frequencies at frequency hopping:
Connection referenceDateTime (hour, minute, second, decisecond)Mobile allocationFrequency information
Frequency Information One of the following parameters: Frequency list, Cell channel description Frequency channel sequencedescription, Frequency ch sequence.
Frequency Synchronised Radio Network A radio network in which there are no frame number relations between RBSs. The RBSs do not transmit and receive TDMA frames with a known number at the same time. Adjacent RBSs in a frequency synchronized network should not use the same frequencies, in order to minimize interference.
Full Measurements Measurements are made on all TDMA frames in the SACCH period.
Full Rate There is one full rate TCH per BPC in the air interface.
Full Rate Capable TCH A TCH which can support a full rate call. A TCH which can support both full rate and half rate and where only one half rate part is idle is not considered as full rate capable.
Function Change of Managed Objects Function Change of Managed Objects is the process where all manually deblocked managed Objects that belong to specific BTS type are checked or loaded with a predefined set of software versions.
G1‐GSM 900 Band Frequencies in the 900 MHz band, in the range 880‐890 MHz uplink and 925‐935 MHz downlink, in the Absolute Radio Frequency Channel Number (ARFCN) range 975‐1023 and 0.
Gamma Value A power regulation value used by the MS.
GAN Cell A cell belonging to a Generic Access Network (GAN). A GAN cell is a geographical area equal to a location area, a PLMN or a country in the corresponding standard radio access network, GERAN or UTRAN. A GAN cell is always considered as external to GERAN.
GAN Cell Global Identification (GAN‐CGI) The GAN‐CGI is the CGI used by the Mobile Station when signalling to the Core Network. The GAN‐CGIs are divided into separate GAN‐CGI groups. The GAN‐CGI has no physical meaning, and does not provide any information on the actual geographical location of the Mobile Station.
GAN System Information Data Contents of GAN Cell Description and GAN Control Channel Description information elements.
GAN‐CGI Group A GAN‐CGI Group is a group of GAN‐CGIs that all share the same properties, for example, billing level or available services.
Gaussian Minimum Shift Keying (GMSK) A modulation method based on phase shift keying. Each symbol (carrier phase position) represents one data bit.
(AP) an unlicense radio The AP connec d the CN
Gb Interface The interface between the SGSN and the PCU. Each Gb link forms a wideband connection, which is terminated in the PCU via different transmission types.
Gb SNT An SNT with a Gb link connected to it.
General Packet Radio Service (GPRS) A packet based radio service which is implemented in GSM based systems.
Generic Access Short for “Generic Access to the A/Gb Interface”, the name of the 3GPP standard allowing access to A/Gb, for example, over wireless LAN and Internet.
Generic Access Network (GAN) Generic Access Network (GAN) provides a complementary access to the GSM Core Network (CN). A Mobile Station connects to an Access Point (AP) by an unlicensed radio interface The AP is connected to the CN by d interface. is te to through an IP broadband network. Both speech and data traffic is supported over GAN.
Geographical Scope The Geographical Scope (GS) indicates the geographical area over which the message code is unique and the display mode. The message is not necessarily broadcast by all cells within the geographical area. When two messages are received with identical Serial Numbers and Message Identifiers in two different cells, the GS may be used to determine if the second message shall be treated as a new message by the MS. The GS indicates the scope of the message and the display mode for the message:
GS — DISPLAY MODE — GEOGRAPHICAL SCOPE
0 — Immediate — Cell wide
managed the BTS es bli d if possibl
1 — Normal — PLMN wide
2 — Normal Location — Area wide
3 — Normal — Cell wide
Immediate = default direct display
Normal = default display under user interaction
Global State The defined global states are:
DEF – The managed object is defined.COM – The managed object is defined and communication with the managed object in the BTS is established if possible object in is ta she , e.PREOPER – The managed object is in the process of being brought into operation.OPER – The managed object is operational.NOOPER – The managed object is temporarily non operational.FAIL – The managed object is permanently non operational. (Manual intervention is needed to bring the managed object back into operation)
Global System Type The system type that specifies the system type of the whole BSC. Values: GSM 800, GSM 900, GSM 1800, GSM 1900, MIXED.
Global Title An address such as dialled digits which does not explicitly contain information that would allow routing in the signalling network, that is, a translation function is required.
GMM/SM Signalling GMM/SM signalling is assigned PFI=1 and shall be treated at highest QoS priority. There is no ABQP associated with PFI=1.
Gn Interface The interface between the SGSN and the GGSN.
GPH Device A 64 kbps hardware device located in a GPH RP. Each manually deblocked GPH device can be considered as four 16 kbps GPH subdevices.
GPH Gb Device A manually blocked GPH device that may be used in a Gb link.
GPH GSL Available Capacity The remaining RP capacity available for the seizure of GSLs. The available capacity may be less than the GPH GSL idle capacity due to processor load limitation. Both GPH GSL idle capacity and current GPH GSL load are used in determining the available capacity.
GPH GSL Device A manually deblocked GPH/sub‐GPH device which may be used as a GSL link. The bandwidth required for the GSL link depends on whether it is required for a Basic GPRS PDCH, a GPRS PDCH or an EGPRS PDCH. A Basic GPRS PDCH requires a 16 kbps GPH subdevice while a GPRS PDCH or an EGPRS PDCH requires a 64 kbps GPH device.
GPH GSL Load GPH GSL Load gives a measure of actual GPH GSL load on a particular RP. It is measured in number of equivalent GPH 16 kbps GSL devices and is calculated according to the formula:
GPH_GSL_Load = N16 + (EPPLR*N64)
where
N16 is the number of seized GPH 16 kbps GSL devices in each RP
N64 is the number of seized GPH 64 kbps GSL devices in each RP
EPPLR is 64 kbps GSL/16 kbps GSL load ratio, a parameter that gives the ratio between the processor load needed for a 64 kbps GSL and the processor load needed for a 16 kbps GSL.
GPRS Attached An MS state in which the network is aware of the MS being GPRS capable.
GPRS Available A state in which GPRS support is active in a cell and the cell is active.
GPRS BA‐list A list of neighbour cells with GPRS support and the absolute radio frequency numbers of the BCCH carriers in these cells. The list is part of packet system information and facilitates cell selection and reselection for GPRS MSs in both packet idle mode and packet transfer mode.
GPRS Multislot Class MS capability of handling multiple timeslots. There are two groups supported; Type 1 MSs (Class 1 – 12 and Class 19 – 45) which need not be able to transmit and receive at the same time and Type 2 MSs (Class 13 – 18) which are able to transmit and receive at the same time.
GPRS Packet Handler (GPH) The RP part of the BSC PCU application used by GERAN.
GPRS PDCH (G‐PDCH) A logical channel used for transfer of GPRS (CS‐1 to CS‐4) packet data and control signalling. A G‐PDCH uses a 64 kbps Abis link.
PACKET SYSTEM INFORMATION TYPE 14 MESSAGE
GPRS Signalling Link (GSL) An Abis link between the CCU in the BTS and the PCU in the BSC used to convey information, which is transmitted or received on a PDCH.
For a Basic GPRS PDCH, a 16 kbps GSL is configured by establishing a logical or physical subrate connection between the Abis transmission subdevice and a GPH GSL subdevice.
For a GPRS PDCH or an EGPRS PDCH, a 64 kbps GSL is configured by establishing a logical or physical connection between the Abis transmission device and a GPH GSL device.
GPRS System Information Messages SI messages related only to GPRS. These are the following:
PACKET SYSTEM INFORMATION TYPE 14 MESSAGE SYSTEM INFORMATION TYPE 13 MESSAGE
GPRS System Information Parameter A GPRS Parameter that the MS need to communicate with the GPRS network.
GPRS TBF (G‐TBF) A TBF that can use Coding Schemes CS‐1 to CS‐4.
GPRS TBF Capability GPRS TBF Capability determines the range of CSs available for a GPRS TBF. The range can be either (CS‐1, CS‐2) or (CS‐1, CS‐2, CS‐3, CS‐4). The range is set by the capabilities of the PDCHs used for the GPRS TBF. If any of the PDCHs in the GPRS TBF are only (CS‐1, CS‐2) capable the GPRS TBF Capability will be (CS‐1, CS‐2). However If all the PDCHs in the TBF are (CS‐1, CS‐2, CS‐3, CS‐4) capable the GPRS TBF Capability will be (CS‐1, CS‐2, CS‐3, CS‐4).
GPRS TCH (G‐TCH) A traffic channel, which in the packet switched domain is capable of carrying GPRS (CS‐1 to CS‐4) packet data and control signalling.
GPS Shadow The radio signals from the GPS satellites do not reach the GPS receiver due to obstacles (for example, buildings).
Group Call Area Group call area is the set of cells in which a specific Voice Group Call is set up. The GCA may consist of cells from one or more BSCs or MSCs.
GS Channel The channel between the PCU and CCU, which starts in a GSL device.
GS Interface The interface between the SGSN and the MSC.
GSM 1800 Frequency in the GSM 1800 band, in the range 1710‐1785 MHz uplink and 1805‐1880 MHz downlink, in the Absolute Radio Frequency Channel Number range 512‐885.
GSM 1900 Frequency in the GSM 1900 band, in the range 1850‐1910 MHz uplink and 1930‐1990 MHz downlink, in the Absolute Radio Frequency Channel Number range 512‐810.
GSM 800 Frequency in the GSM 800 band, in the range 824‐849 MHz uplink and 869‐894 MHz downlink, in the Absolute Radio Frequency Channel Number range 128‐251.
GSM 900 Frequency in the GSM 900 band, in the range 880‐915 MHz uplink and 935‐960 MHz downlink, in the Absolute Radio Frequency Channel Number range 1‐124, 975‐1023 plus 0.
pr zed aga nst HCS If on one HCS use the
GSM 900 Mobile In this document, GSM 900 mobile means that a mobile has the capability to be assigned to at least one of GSM 900 channel bands (P, E).
GSM EDGE Radio Access Network (GERAN) GSM EDGE Radio Access Network (GERAN) provides the standard access to the GSM Core Network (CN). A Mobile Station connects to the network by the air interface to the BTS.
GSM RF GSM Radio Frequency ‐ Layer 1 of the Um interface.
Half Rate Partner When half rate is supported, it is possible to allocate two half rate TCHs on the same timeslot on the radio interface. These two half rate TCHs are partners to each other.
HCS Band An HCS band is a group of contiguous layers. An HCS band can be prioritized against other HCS bands If only one HCS band is used all theioriti i other bands. ly band is d all layers are within this band. HCS band 1 has the highest priority and HCS band 8 has the lowest priority when making the candidate list.
Header File A file in the BTS software package that defines the contents of the software package.
HFS Reduction/ HFS Extension When there is insufficient operational equipment available to support the full set of frequencies in a base band hopping channel group the BPCs in that channel group will hop over a reduced set of frequencies.
When further equipment becomes available an HFS reduced hopping group can be expanded to support one, or more, of the unsupported frequencies. This process is called HFS extension.
(GANC) A GANC appears the core ne k as a St em
High Handover Rate When a fast moving mobile is identified by high inter cell handover intensity under a certain time. Then the high handover rate indicator is set and the ranking will be based on best signal strength, until next handover.
Higher Frequency Band Group The higher frequency band group consists of the GSM 1800 and GSM 1900 frequency bands.
Higher Order Termination (HOT) Board Terminates a 155 Mbps Synchronous DIP (SDIP).
Holdover Mode This is when a TF temporarily operates as a local oscillator, for a period of typically one hour, due to loss of its synchronization source.
Home Base Station Controller (HBSC) The Ericsson implementation of a Generic Access Network Controller (GANC) A GANC appears to the core network as a Base Station System. to twor Base ation Syst (BSS). The HBSC is implemented as a part of the BSC.
Hopping Frequency Set (HFS) The set of frequencies on which a channel is transmitted in a frequency hopping system.
HSCSD Connection A HSCSD connection is the name of the connection which is setup when a HSCSD service is requested by the MSC. The offered connection is either of multislot type, or of singleslot type, depending on whether a multislot configuration is used or not.
Hysteresis Area The hysteresis area is the corridor around the nominal cell border, given by the +/‐ hysteresis.
Hysteresis Reduction Hysteresis reduction is the percentage reduction of the hysteresis area to be used when selecting the MSs to be moved to other cells due to cell load sharing.
I Frame A LAPD protocol information frame, used to perform information transfer between layer 3 entities.
Idle Channel TCH or SDCCH which is deblocked, but not allocated for traffic or test.
Idle Level The number of idle transcoder resources in a transcoder pool.
Idle Level Limit A limit for the percentage of idle transcoder resources, compared with the required number of transcoder resources, in a transcoder pool.
Idle Ranking Value A ranking value that gives an indication of how well one TCH group fulfils the allocation request for a new channel set to be used as ODPDCHs. The idle ranking value is then compared with the ranking values of other TCH groups in order to find the best TCH group.
Immediate Rearrangement The moving of LAPD links from highly used TRHs to TRHs with enough free capacity. This is initiated at once by a command.
Improved ACK/NACK (IAN) An EGPRS and EGPRS2A functionality that makes it possible to resend missing RLC blocks earlier. With Improved ACK/NACK acknowledgements are sent more often. This is achieved both by event based ACK/NACK reporting and by polls for ACK/NACK reports. Improved ACK/NACK also uses a technique called Piggybacked ACK/NACK (PAN), which means that a PAN field can be piggybacked on an RLC data block (MCS‐1 to MCS‐3, MCS‐5 to MCS‐8, DAS‐5 to DAS‐12, or UAS‐7 to UAS‐11). The PAN field is added without changing the original amount of data contained in the host RLC data block.
For a downlink TBF, the MS adds PAN reports on RLC data blocks belonging to its uplink TBF or if it does not have any uplink TBF it will use ordinary 44.060 EGPRS PACKET DOWNLINK ACK/NACK messages.
For an uplink TBF, PAN reports are included in any FANR mode RLC data block on a PDCH that is used by the TBF. If there are no FANR mode TBFs in the downlink direction, then ordinary 44.060 EGPRS PACKET UPLINK ACK/NACK messages are used instead.
Inactive VAMOS Pair When only one of the logical channels in a VAMOS pair has been allocated for an MS, the VAMOS pair is inactive..
Incoming Calls From the BSC/TRC point of view, incoming calls are equivalent to paging command messages received on the A interface from MSC and TRA requests received on the Ater interface from a stand‐alone BSC.
Incremental Redundancy (IR) A technique to decrease the number of retransmissions using joint decoding/soft combining. Each RLC data block is sent as a punctured convolutional code word. If decoding fails, the received code word is stored and another code word but with a different puncturing scheme is transmitted. Joint decoding/soft combining is used to combine replicas of the code word and increase the probability of successful decoding. A maximum of three punctured code words (replicas) can be combined for decoding.
Initial Voice Group Talker The Initial Voice Group Talker is set up after an MS, capable of Voice Group Call Services, has initiated a Voice Group Call.
Inter Cell Handover Inter cell Handover is a channel HANDOVER change between two channels in the same BSC.
Inter Cell Holdover The Inter Cell Holdover Mode indicates that only TRXs in the same Slave TG in TG Cluster are used together to realize a cell. This means that only the TRXs within that TG need to be synchronized within 1/4 symbol to fulfill GSM requirements.
Inter System Handover Handover between networks using different radio systems, for instance GSM and UMTS.
Interactive Class Used by applications without any absolute requirements on bitrate or delay. The class does not guarantee any user an absolute service level but users are given service relative to each other depending on their negotiated priority. A typical application is web‐browsing.
ace it tion t (ICP) The ICP group an emen tion ant capabilit ib The
Interface Connection Point (ICP) The ICP identifies the end‐point of a POINT 16 kbps PCM timeslot in the IS. When prefixed as Abis ICP, the PCM link is towards the BSC; when prefixed as MO‐ICP the PCM link is towards a managed object in the BTS (TRXC for signalling, TS for traffic).
Interface Switch (IS) An application object. It provides switching capability within the TG by setting up connections between digital connection points (DCP).
Interface Switch (IS) (G12) An application object. It provides switching capability within the TG by setting up connections between digital connection points (DCP). The IS is capable of switching on a combination of 16 kbps, 32 kbps, and 64 kbps at any given time.
Interface Switch Connection Point (ICP) GroupInterf Sw ch Connec Poin Group The ICP group is an implementation dependant capability attribute The is impl ta depend y attr ute. set of ICPs, connected with the same physical link to one or more TRXCs, belong to an ICP group. Each TRX belong to one ICP group.
Interference Level The interference of idle channels are continuously measured. The channels are assigned to interference bands delimited by different interference levels. At channel allocation the channels in the band with lowest interference are chosen.
Interference Limit Upper limit which defines the range of idle channel measurement values within an idle channel interference band. The limit value range is 0 to 62. These threshold values correspond to the discrete boundaries in dBm between the RXLEV values defined in 3GPP TS 45.008. For instance value 0, corresponds to the boundary between RXLEV 0 and RXLEV 1. I.E. the discrete value ‐110 dBm.
Interference Measurement Radio signals on an idle channel would interfere with the channel in use. The signal strength of such interfering signals is measured in the BTS, measurement being made per SACCH period.
Interference Rejection Combining (IRC) IRC is a method of improving receiver performance in a cell when radio interference in a cell is high. If interference is low there is no receiver performance gain when IRC is switched on.
Intermittent Fault When a fault affecting functionality is reported by the BTS, a test of the object is ordered. If the test result shows the unit to be fault free the fault is classified as an intermittent fault.
Internal Cell A cell that is controlled by the current BSC and that belongs to GERAN.
International Mobile Station Equipment Identity (IMEI) Each MS must have a unique identity and must transmit this if requested by the PLMN. The IMEI is incorporated into a module which is built into the MS and is physically secured.
Intra BSC Change of Channel Includes intra BSC handover, intra BSC assignment, intra cell handover, overlaid subcell change and underlaid subcell change.
Intra Cell Handover A handover between two channels in the same subcell.
Intra Cell Holdover The intra cell holdover Mode indicates that the slave TG is used together with other TGs within the same TG cluster to realize one cell. This means that the TRXs in all these TGs need to be synchronized within 1/4 symbol to fulfill GSM requirements.
IP Application The IP application is a user of IP service that is provided by IP connectivity.
IP The IP parame are the parame th can app d con
IP Connectivity Supervision (IPS) IPS is an IP application that is used for supervising IP connectivity within the PCU.
IP Device An IP device is a SW entity that IP parameters are assigned to.
IP Gateway An IP gateway is an entity that chooses different paths for the network packets, based on the addressing of the IP frame it is handling. Different gateways connect to different networks. The IP gateway will have more than one address, as each gateway is part of several networks.
IP Interface An IP interface is an Ethernet interface handled by the IP stack. It can be configured with IP address and subnet mask.
IP Parameters Parameters The IP parameters are the parameters that can be applied to configure ters ters at be lie to figure IP interface in order to enable the IP communication.
IP Stack The IP stack handles the data connection management, data transmission, and reception based on the TCP/IP protocol suite.
Iur‐g Interface The interface between a BSC and a TD‐SCDMA RNC.
Jitter Jitter is the irregularities in packet arrival time caused by delay variation in the IP network and the unlicensed radio link.
Jitter Buffer A jitter buffer handles irregularities in packet arrival time by introducing an extra delay. This extra delay allows packets that are more delayed than the average to reach the transcoder within the correct time interval.
Joint Decoding Different transmission versions of the same RLC data block, where a common MCS but different puncturing schemes have been deployed, are used together in the decoding process.
K‐cell Cell evaluation is based on signal strength criterion.
L‐cell Cell evaluation is based on path loss criterion.
Language Code The language code is used to distinguish which language the message is in. The parameter does not cater for special characters within different languages.
0 German
1 English
2 Italian
3 French
4 Spanish
5 Dutch
6 Swedish
7 Danish
8 Portuguese
9 Finnish
10 Norwegian
the The en MODE the HEX
11 Greek
12 Turkish
13 Hungarian
14 Polish
15 Language unspecified
16 Default 7‐bit alphabet message preceded by language indicator. The first 3 characters of the message text shall be entered as a two‐character representation of the language encoded according to ISO 639, followed by a carriage return (CR) character and 90 7‐bit characters of the text The entry MODE for the text is HEX text. try for text is .
17 UCS2 16‐bit encoding message preceded by language indication. The message text shall be starting with a two 7‐bit default alphabet character representation of the language encoded according to ISO 639. This is padded to the octet boundary with two bits set to 0 and then followed by 40 characters of UCS2‐encoded message text. The entry MODE for the text is HEX.
18‐63 are reserved for European languages.
LAPD Bundling With Packet Abis over IP a number of LAPD frames can be bundled together within a given transport session. The purpose of this bundling is to use the available bandwidth between the STN and the BSC in an efficient way.
dis the messages the dica d TRX a th r respective
LAPD frames that are bundled together are gathered from the same LAPD bundling group. A group is a configurable set of traffic types that has been assigned the same priority and attributes for IP transport with Packet Abis over IP. The traffic types are identified by their Service Access Point Identifier (SAPI). A LAPD bundling group is defined on BSC level, but the bundling is always performed per set of traffic types for a specific Transceiver Group (TG).
LAPD Concentration LAPD concentration of the data links is achieved by letting different terminal equipment share the same 64 kbps connection.
LAPD Concentrator A LAPD concentrator receives messages to several TRXs on one concentrated LAPD link connected to the BSC. The LAPD concentrator distributes the messages to the indicated TRXs via their respectivetributes to in te s vi ei dedicated non concentrated LAPD links. A LAPD concentrator also receives messages from several TRXs and transfers them to the BSC on the concentrated LAPD link.
LAPD Concentrator (G12) An application object. It provides the functionality for the distribution of signalling information from concentrated links sharing Abis paths on to un‐concentrated links, each terminated by a TRXC.
The maximum concentration factor, or number of signalling links that can be concentrated on to the same 64 kbps Abis path, is 16.
Up to 8 concentrated 64 kbps Abis paths can be routed to a maximum of 16 TRXCs.
gna ng on the Abi LAPD a pro oco th opera es the
LAPD Concentrator Board A LAPD concentrator board is a radio interface terminal which handles the LAPD concentrators. The board is an LAPD CNC‐EM which is connected to a radio selector in a TRI‐EM.
LAPD Concentrator‐EM (LAPD CNC‐EM) An EM that contains a LAPD Concentrator board.
LAPD Link The LAPD links are used for signalling between the BSC and the BTS.
LAPD Multiplexing A technique to enable one or several data links with a given subrate capacity limit of 16 or 32 kbps to share the same physical 64 Kbps transmission path with other signalling links or subrate traffic channels.
LAPD Protocol Link Access Protocol on the D‐channel, is a layer 2 protocol used for signalling on the Abis interface LAPD is a protocol that operates at thesi lli s interface. is t l at t at data link layer of the OSI architecture.
LAPD Signalling Link Signalling link used for signalling from the BSC to the BTS.
Layer Each cell belongs to a layer. The layer is a way to priorities the cell towards other cells. Layer 1 has the highest priority and layer 8 has the lowest priority within the HCS band when picking a cell candidate.
Layer 2 Management Link (L2ML) Serves the L2 Management Procedures. Used for management of the data links sharing a physical connection.
Lb Interface The interface between the BSC and the SMLC.
Li oco D Channel (LAPD) LAPD a 2 pro oco use gna ng on the Abi LAPD
Leak Rate Information element in the messages 48.018 FLOW‐CONTROL‐BVC, FLOW‐CONTROL‐MS and FLOW‐CONTROL‐PFC. The IE indicates the predicted radio link data rate, given in 100 bits/second, with which the bits are successfully transmitted in the cell, to the MS or to the PFC. SGSN is expected to use the leak rate value to calculate when to send the next LLC‐PDU to be stored in the Bmax buffer in the PCU.
Level Store A counter in BSC‐CP which is incremented and decremented by the traffic handling functions. At a predefined interval the level store is copied to the actual counter. Except for Maximal MS sessions, where the level store is compared with the actual counter and if the new value is greater than the old value the counter is copied.
Link Access Protocol For D Channel (LAPD)nk Access Prot l For ‐ LAPD is a layer 2 protocol used for signalling on the Abis interface LAPD is layer t l d for si lli s interface. is a protocol that operates at the data link layer of OSI architecture.
Link Adaptation (LA) An approach used to select the optimum coding scheme based on radio link quality. Damaged data blocks are not soft‐stored by the receiver but are immediately discarded. Transmission using LA involves varying the MCS to suit the prevailing radio conditions.
Link Quality Control LQC is a function which seeks to optimize the throughput (bitrate) of each uplink and downlink TBF based on the radio link quality at any given time. There are two methods of LQC, called Link Adaptation (LA) and Incremental Redundancy (IR).
LLC‐PDU An LLC frame transferred between the LLC layers in a mobile station and the SGSN.
re d Obj s and the BSC possibl The
LMT Intervention A Local Maintenance Terminal (LMT) can be connected to the BTS. When Local Maintenance occurs a Fault Report is sent from the relevant Managed Object indicating LMT Intervention. The Managed Object then has access state LOCALLY DISCONNECTED.
Load Operation A load operation involves either a combined download and upgrade of software or a separated download and upgrade. The operator defines the type of load operation.
Local IP End Point (LIP) An IP Network end point in the BSC, defined by an IP address and an IP port.
Local Mode (G12) When a Service Object is in local mode no communication between it and the BSC is possible. No communication between a Service Objects related Application Objects and the BSC is possible either The Servicelate Application ect is e either. Service Object Central Functions (CF) is a special case and, in local mode, it has limited communication with the BSC.
A service object may be in local mode during installation or repair of BTS equipment.
Local OMT An OMT communicating with the BTS via a direct RS232 connection.
Locating The process that, using measurement data and parameter data, proposes the most suitable connection. The output is a list of possible candidates for handover or assignment.
Location Estimate An estimate of the geographic location of an MS.
Channel (SDCCH) c Channel (TCH) t rol Channel
Location Information Information to calculate a location estimate for an MS, for example TA value for an MS in a serving cell.
Location Measurement Unit (LMU) A node defined for GSM Location Services. The LMU has the capability of measuring the air‐interface timing of one or more BTSs and relating the respective timings to an absolute time base such as GPS. The LMU also has the capability of communicating this information to the SMLC via the standard protocols. Basically, the LMU is a low cost solution consisting of a simple GPS receiver and a GSM radio.
Location Trigger An HSN service that is able to trigger value added services in the core network when an MS registers or unregisters in GAN.
Logical Channel (LCH) This is a name used in common for, Stand‐alone Dedicated Control Channel (SDCCH) Traffic Channel (TCH) Broadcast Control Channel , Traffi , Broadcas Cont (BCCH), and Cell Broadcast Channel (CBCH).
Logical DIP Supervision Device Logical device used to connect the managed object DP to Digital Path supervision functions.
Logical Link Control (LLC) LLC is a layer 2 protocol between the SGSN and the MS, which is transparent to the BSS.
Logical TG Cluster A TG cluster with assigned TG cluster identity.
Logical Unit (LU) (G01) The logical units are a subset of the managed objects with similar properties in an operation and maintenance sense. They provide a defined part of the BTS functionality. Logical units can be configured to achieve this BTS functionality. The following managed objects are logical units: transmitters, receivers, time slot handlers and timing functions.
Logically Loadable Unit (LLU) A managed object with the property of being loaded internally from a Physically Loadable Unit (PLU). This property is indicated by the function code LLU owner.
Lower Frequency Band Group The lower frequency band group consists of the GSM 800 and GSM 900 frequency bands.
Lower Order Termination (LOT) Board Terminates the 2 Mbps DIPs included in the STM‐1 frame.
MAC Mode A method for allocation of UL timeslots to an MS. Either Dynamic Allocation (DA) or Extended Dynamic Allocation (EDA).
Main Channel The channel in a HSCSD multislot configuration that carries the main signalling link.
Main Channel The channel that carries the main signalling link in a multislot configuration (HS). The channel combination for the main channel is (viii):
TCH/F + FACCH/F + SACCH/M
Managed Object (MO) A managed object is a logical representation of hardware units and software at the base transceiver station site. Note that hardware can be shared between managed objects of different classes. The transceiver group is a special case, it does not have any own hardware or software. Instead it consists of a set of managed objects from other managed object classes.
Managed Object Class (MOC) (G01) Managed objects may have different properties. Managed objects with the identical properties belongs to the same managed object class. The managed object classes in the G01 model are: transceiver group, transceiver controller, receiver, transmitter, time slot handler and timing function.
Managed Object Class (MOC) (G12) Managed objects may have different properties. Managed objects with identical properties belong to the same Managed Object Class. The valid Managed Object Classes in the BTS logical model G12 are:
Transceiver Group (TG), Central Functions (CF), Transceiver Controller (TRXC), Interface Switch (IS), Digital Path (DP), Receiver (RX), Transmitter (TX), Time Slot (TS), Concentrator (CON), Timing Function (TF), and Multi Carrier Transceiver (MCTR).
Managed Object Instance (MOI) This term is used to denote a single specific occurrence of a managed object.
Managed Object Type (MOTY) A managed object type is the implementation of a managed object class in a BTS logical model. Therefore there may exist managed objects belonging to the same MOC, but different MOTY in the BSC. A managed object type can handle one or more BTS IWD Versions.
Note that BTSs of one manufacturer that emulates BTSs of a different manufacturer might be seen as the same managed object type.
Manual Test A manual test is a test of specified cells ordered by command.
MAXIHO Maximum number of consecutive intra cell handovers.
considere
Maximum Bitrate An attribute in the QoS profile in the PDP context (which is between MS and SGSN) and the ABQP in the Packet Flow Context (which is between the BSS and SGSN).
The combination of the requested bitrate, the cell capability and the MS capability determines the maximum bitrate of a PFC. The maximum bitrate is specified separately for uplink and downlink direction.
Maximum Channel Data Rate Can be set by the operator to 9.6 kbps or 14.4 kbps.
MAXRET Maximum number of retransmissions.
MAXTA Maximum timing advance (in number of bit periods) when an MS is considered lostd lost.
MDATA MDATA is an APT block that allows the collection of data in real‐time. It adds the event data reported to it to the dynamic buffer, which is streamed out to an external processor once a certain amount of information has been stored. For SCS, a CME20‐specific version called ROMDATA will be created in the BSC.
Mean Hold Time The mean hold time for a transcoder pool is the average of the mean hold times of the transcoder resources in the pool. The mean hold time for a transcoder resource is the mean time a transcoder resource is used for traffic.
Mean Hold Time Alarm Level The alarm level, for the mean hold time of any transcoder resource, within a transcoder pool.
1 124 (GSM 900 P GSM
Mean Hold Time Limit The mean hold time limit is the alarm level for the pool calculated as a function of the hold time of the transcoder resources in a pool.
Mean Idle Level Average of idle levels measured over a fixed period, expressed as a percentage of the required number of transcoder resources for the transcoder pool.
Measurement Broadcast Control Channel Number (MBCCHNO)
The absolute radio frequency channel number on the BCCH for cells to be measured on.
Values:
128‐251 (GSM 800)
1 124 (GSM 900 P GSM band)‐ , ‐ band)
975‐1023, 0 (GSM 900, G1‐GSM band)
512‐885 (GSM 1800)
512‐810 (GSM 1900)
Measurement Data Data associated with a connection. The data consist of Measurement Result received from MS and BTS, and data calculated from internal BSC functions. The Measurement Data for the neighbouring cells contain specific GSM or UMTS information depending on the cell type.
Measurement Report The 3GPP TS 44.018 message MEASUREMENT REPORT received in the BTS from the MS, which contains power and quality measurements.
Measurement Result The 3GPP TS 48.058 message MEASUREMENT RESULT received in the BSC from the BTS, containing BTS measurements and MEASUREMENT REPORT.
Measurement Result Not Interpreted Correctly (MRNIC) A fast way to update the MSs with new BA‐lists. For a certain period of time the measurement reports received from the MSs will not be interpreted correctly by the BSC.
Measuring Program A measuring program is used to hold operator defined time schedule information, allowing for actions to be carried out at certain times.
Message A message is the data defined by the operation staff for broadcast over the air interface. If a message contains one page it is referred to as a single page message otherwise it is referred to as a multi‐page message.
Message Class The message class allows the user to route the message to user defined destinations.0123
Message Code The message code differentiates between messages with the same message identifier.
Message Coding The message coding indicates how the message text is to be decoded by the MS.
CODE GS up num num er message ass and
If 7‐bit coding is used then a message text for the current page can consist of up to 93 user characters each of 7 bits in length. These 93 user characters fill 651 bits of the 82 message text octets. The remaining 5 bits are always set to zero. Any unused text is filled with null characters.
If 8‐bit coding is used then the message text for the current page can consist of up to 82 user characters each of 8 bits in length. Any unused text is filled with null characters.
If 16‐bit coding is specified, UCS2 16‐bit coding scheme is used. Each message page can consist of up to 41 user characters (164 HEX characters). Any unused text is filled with null characters.
Message Header Six octets is used as the header. The message header consists of ID, CODE GS update number number pages language message class and, , date ber, b pages, language, cl message coding.
If UCS2‐bit coding is used, the message page consist of a two 7‐bit default alphabet character representation of the language encoded according to ISO 639 and up to 40 user characters. 16‐bit encoding scheme is used to each user character. Any unused text is filled with null characters.
Message Identifier The message identifier identifies the source and type of message.
Message Page A message page is the smallest unit broadcast over the air interface to the MSs. A message page consists of a fixed block of 88 octets, which is the message header and the message text.
MFDDARFCN ARFCN for the UTRAN FDD cell, see also UMFI.
n the ne k tion estima ca The
Minimum Disturbance A mechanism of configuring BPCs within a cell such that reduction in capacity and service within the cell is minimized at the expense of cell recovery time during a re‐configuration. (See Configuration Method).
Mobile Allocation Index Offset (MAIO) Mobile Allocation Index Offset is the offset to be used by a particular mobile in indexing the radio frequency channels in the mobile allocation. May alternatively be regarded as the rotation to be used by a particular mobile of the radio frequency channels in the mobile allocation. In a hopping group with n frequencies, the BPC are given MAIOs of 0 to n‐1. This is used to separate the channels.
Mobile Assisted Positioning Any mobile positioning method in which the MS provides location information to the network for location estimate calculations Thei formation to twor for loca te lculations. network may provide assistance data to the MS to enable signal measurements or to improve measurement performance.
Mobile Based Positioning Any mobile positioning method in which the MS performs both signal measurements and location estimate calculations and where assistance data is provided to the MS by the network.
Mobile Station Mode There are two different circuit switched mobile station modes:
IDLE: The mobile station is not connected to any dedicated channel (SDCCH or TCH) , but is listening to the BCCH.ACTIVE: The mobile station is connected to either a SDCCH or TCH.
anne d the rea d cell If the rea tion
Mobile@Home Support Node (HSN) A node in a GAN network that allows the operator to deploy additional services or to enhance the GANC functionality.
Modulation and Coding Scheme (MCS) An error detection and correction method used to reduce Bit Error Rate. There are 10 MCSs defined for EGPRS. The length of the RLC/MAC block varies with the coding scheme used. Control blocks are always transmitted using CS‐1, except in RTTI mode where MCS‐0 is used for downlink control blocks. MCS 0‐4 uses Gaussian Minimum Shift Keying (GMSK) modulation and MCS 5‐9 uses 8 Phase Shift Keying (8‐PSK) modulation.
MOVEOFCELLTIMER This timer, when running, disables subsequent cell reallocation attempts during its duration. If the last cell reallocation attempt was successful, the purpose of this timer is to allow the configuration of GPRS dedicated channels to be attempted for the reallocated cell If the last reallocationch ls to be attempte for llocate . last lloca attempt was unsuccessful, the purpose of the timer is to protect the CP from overload due to continuous cell reallocation attempts.
MS Frequency Capability The MS frequency capability is extracted from the Information Elements (IE) Classmark Information Type 2 and Classmark Information Type 3 and indicates which frequency bands the mobile supports. One or several of the following frequency bands could be indicated:
MS Multislot Class MS capability of handling multiple time slots. There are two groups called Type 1 MS (Class 1 ‐ 12, Class 19–45) and Type 2 MS (Class 13 ‐ 18).
MSC Capacity The MSC Capacity parameter defines the relative capacity of an MSC node compared to the other MSCs in the same MSC pool. The MSC selection bases its distribution algorithm on the MSC Capacity parameter.
MSC in Operation This means that the MSC is in one of the following modes: BARRED, RESELECT or ACTIVE.
MSC Mode An operational state of the MSC, as perceived by the BSC. An MSC can have the following modes in the BSC:
Inactive ‐ The MSC is out of service from the BSC's perspective, meaning that the MSC will not have any MSs assigned to it.Active ‐ MSs will be assigned to the MSC according to MSC Capacity.
Reselect ‐ MSC Reselection is activated for the MSC.Barred ‐ MSs assigned to the MSC will be moved to another MSC at the next mobile originating network access.
MSC Not in Operation This means that the MSC is in mode INACTIVE.
MSC Pool A pool of MSC nodes serving the same BSCs or BSC/TRCs. Each MSC in the pool has one or more NRIs.
MSC Pool Area An MSC Pool Area consists of one or more Location Areas and is the total radio coverage area served by a pool of MSCs.
MSQHOTIME A timer th time a tion wait a
MSC Reselection The procedure is activated by the operator when some or all of the subscribers need to be moved from the MSC where they are currently registered to another MSC. MSC Reselection means either that a certain part of the MSs belonging to the MSC will be moved to another MSC at the next location update, or that all the MSs will be moved at the next mobile originating access to the network. The MSC Reselection is controlled by command parameters.
MSC Selection An algorithm in a BSC or BSC/TRC node used to select an MSC in mode ACTIVE for a subscriber not yet connected to an MSC, or for a subscriber that is subject to MSC Reselection or Alternative Routing. The selection is based on the MSC Capacity parameter set by command for each MSC.
MSQHOTIME A timer that decides how long time a Priority Connection shall wait for a at decides how long Priority Connec shall for new spontaneous cell candidate list when queued due to handover. If no list is received before the timer elapses, the Priority Connection is removed from the queue.
MTR Administrative Data The meaning is:
Exchange identityDateTimeFile format revision informationRecording referenceRecording type
MTR Administrative Data Type 1 The administrative data recorded when MTR is initiated with the message TRACE INVOCATION.
Exchange identityDateTime (hour, minute, second, decisecond)File format revision informationRecording referenceRecording type
MTR Administrative Data Type 2 The administrative data recorded when MTR is initiated with the message MSC INVOKE TRACE.
Exchange identityDateTime (hour, minute, second, decisecond)File format revision informationTrace typeTrace typeMobile IDTrace referenceTransaction ID
MTR Event Assignment command (1),
Assignment complete (2),
Assignment failure (2),
Assignment failure to MSC (3),
Intra BSC, Inter Cell handover command (1),
Intra BSC, Inter Cell handover complete (2),
Intra BSC, Inter Cell handover failure (2),
Inter BSC handover required (3),
Inter BSC handover command (1),
Inter BSC handover complete (2),
Inter BSC handover failure (2),
Intra BSC, Inter Cell handover command during assignment (1),
Intra BSC, Inter Cell handover complete during assignment (2),
Intra BSC, Inter Cell handover failure during assignment (2),
Inter BSC handover required during assignment (3),
Inter BSC handover command during assignment (1),
Inter BSC handover complete during assignment (2),
Inter BSC handover failure during assignment (2),
Intra BSC, Intra Cell handover assignment command (1),
Intra BSC, Intra Cell handover assignment complete (2),
Intra BSC, Intra Cell handover assignment failure (2),
MTR Event Data DateTimeMTR eventChannel description serving/target cellCell identity serving/target cellRanking value for handover candidatesHigh handover rate indicatorgh hand te in to
MTR Recording Reference An identifier for the MS connection.
Multi Band Cell A cell in which multiple frequency bands reside, such as GSM 800, GSM 900, GSM 1800 and GSM 1900.
Multi Band Operation Mode Multi band operation mode enables the MSs to use channels in more than one frequency band, that is, assignment and handover between all system types (except between GSM 1800 and GSM 1900 cells) is possible, if supported by MS, BTS and MSC.
su carr d on the MUX The RBLT ce connec d
Multi Carrier Transceiver (MCTR) A Multi Carrier Transceiver is an Application Object. It provides the power amplifying functionality necessary to transmit bursts from one, or more, TX instances, and the RF reception functionality necessary to receive bursts by one, or more, RX instances.
Multi‐RAT MS An MS capable of accessing different Radio Access Technologies, for example, GSM and WCDMA.
Multiplex Section The trail between and including two multiplex section terminations.
Multiplexed Device (MUX) A multiplexed device (MUX), 64 kbps, carrying 4 full rate (FR, EFR or AMR) traffic channels, each being a 16 kbps subchannel on the device. Half rate (HR or AMR HR) carries 8 traffic channels, each being an 8 kbps subchannel carried on the MUX device The RBLT device is connected tobchannel ie device. devi is te to the BTS via a transmission device. One MUX caters for the communication on 4 or 8 DEMUXs.
Multislot Configuration A HSCSD multislot configuration consists of a number of timeslots. One timeslot for the main channel and different numbers of timeslots for bi‐ and uni‐ directional channels, all channels being full‐rate TCHs. A HSCSD multislot configuration may be assigned to one MS.
Multislot Connection In a HSCSD multislot connection a number of full rate channels can be combined, to enable higher user rate for an MS connection. A HSCSD multislot connection uses a multislot configuration of channels.
Mutual Relation Handover is allowed from the current cell to the neighbouring cell and the opposite is also allowed.
coun excee s it max mum va a timer ar d When thi timer
N3103 A network based RLC counter. It is reset when RLC protocol transmits the final 3GPP 44.060 PACKET UPLINK ACK/NACK message on a TBF (final ACK indicator bit is set). If an 3GPP 44.060 PACKET CONTROL ACKNOWLEDGMENT message is not received in reply from the MS, RLC increments this counter and retransmits the 3GPP 44.060 PACKET UPLINK ACK/NACK message. If the counter exceeds it maximum value, the TBF is released. The maximum value is 5.
N3105 A network based RLC counter. It is reset when RLC successfully receives a control message from the MS. If an expected PACKET DOWNLINK ACK/NACK message or 3GPP 44.060 PACKET CONTROL ACKNOWLEDGMENT message is not received in response to a polling request, RLC increments the counter and polls the MS again. If the counter exceeds it maximum value a timer is started When this timerter d i lue, is st te . s expired, the TBF is released.
NC2 Session An NC2 Session starts when an MS enters Network Control Mode 2 and stops when an MS leaves Network Control Mode 2.
Near End Incoming direction.
Network Control Mode 2 (NC2) A mode of network control where the network has full control over the cell reselection for the MS.
Network Indicator Used for routing purposes in the CCS‐7 network.
Network Operation Mode A GPRS network operates in three different network operation modes. These modes basically decides when packet control channels are used or if combined procedures, for example coordination of CS paging and PS paging, can be used for CS and PS connections.
Network Protection MSP 1+1 The Network Protection function provides protection against loss of traffic. For ET155‐7 the function provides protection against hardware faults in the high order termination.
Network Resource Identifier (NRI) Identifies a CN node (MSC or SGSN) assigned to serve a mobile station. The NRI is retrieved from the TLLI or TMSI. The length of the NRI shall be the same in all nodes of a pool area. More than one NRI may be assigned to a CN node.
Network Service (NS) Layer The NS Layer provides the layer 2 functionality on the Gb interface. It handles transport of BSSGP Packet Data Units (PDUs) between PCU and SGSN.
Network Service Control Protocol (NSCP) A layer 2 protocol used on the Gb interface.
Network Service Entity (NSE) One of the end‐to‐end entities across the Gb interface.
Network Service Entity Identifier (NSEI) NSEI is an identifier of an NS Entity pair that is having end‐to‐end significance across the Gb interface.
Network Service Virtual Connection (NSVC) An end‐to‐end communication path between NS control peer entities, NSVCs provide a data and signalling path for BSSGP PDUs across the Gb interface. One or more BVCs may be routed through one NSVC. There will exist one NSVC per physical link.
Network Service Virtual Connection Identifier (NSVCI) The identifier of an NSVC.
Node Type The node type can be combined BSC/TRC, stand‐alone TRC or stand‐alone BSC.
Flexibl All d Abi th Abi th th d a TCH BPC creation and re
Nominal MS Power The nominal MS power is defined by the minimum of two values, where the first is the maximum allowed transmit power in the cell for the MS and the second is the maximum possible power for the mobile power class.
Nominal Power The maximum power the BTS is allowed to use for a specific channel, that is the Base Station Effective Radiated Power (ERP)
Non‐64KRES Pool A pool of Abis paths reserved for non‐64kbps traffic and signalling.
Non‐concentrated LAPD Link The non‐concentrated LAPD link is a LAPD link between one TRX and a LAPD concentrator.
Non Flexibly Allocated Abis PathNon‐ y ocate s Pa An Abis Path that is allocated to a TCH at BPC creation and releasedAn s Pa at is allocate to at leased when the BPC is removed.
Non‐Transparent Service A non‐transparent service has error correction procedures. This ensures a negligible error rate, but an unknown throughput rate for the subscriber
Normal MS Release The actions normally performed in the BSC when releasing the connection to the MS. Performed when the MS is or might be tuned to the channel concentrator.
Object Types, Objects and Counters STS is structured around the Measurement Data Base (DB). The Measurement Data Base is divided into a number of Object types (can be compared with files). An Object type corresponds to a specific type of equipment or types of function units in the switch for which statistical data measurements may be of interest. Every Object type contains a number of Objects (can be compared with records in a file), and every Object within the Object type has a set of Counters (can be compared with fields in a record). Every accessible counter has a fixed name. The individual counters are identified by the object type and the counter name within the object type.
Observation Alarm A printout informing the operator of an event which has occurred in the BSC. The observation alarm printout slogan will specify the event.
OCS OCS is a software subsystem which allows the BSC to communicate with an external processor over a TCP/IP link. It consists of both central and regional software, and can be used in conjunction with STOC hardware.
Octet Stream A sequence of 8 bit values.
Offered Calls Offered calls, incoming and originating, are bids for connection to the BSC from the MSC for paging and from the MS for random access and transcoder requests to the TRC node from a stand‐alone BSC for assignment.
Offered Incoming Traffic Jobs From the BSC/TRC point of view, offered incoming traffic jobs are equivalent to:
GERAN Channel requests with cause "answer to paging" received on the Abis interfaceReception of GA‐CSR Paging Response on the Up‐InterfaceTRA requests received on the Ater interface from a stand‐alone BSC
Voice group call requests received on the A interface
Offered Originating Traffic Jobs Offered originating traffic jobs are equivalent to GERAN channel requests, excluding page responses, received on the Abis interface from MSs and reception of GA‐CSR REQUEST messages on the Up‐Interface. Also GPRS channel allocations are included here.
OMC Network Maintenance TCP/IP network interconnecting a BSC with an ROMT/IP.
OMT Connection Resource Logically isolated part of the BSC, with defined IP address and port number, used for communication between ROMT/IP and BTS.
On‐Demand PDCH A PDCH which is set up and released dynamically depending on the need for packet data traffic in the cell. An on‐demand PDCH may be PDCH preempted.
On‐Demand PDCH A PDCH which is set up and released dynamically depending on the need for packet data traffic in the cell. An on‐demand PDCH may be PDCH preempted. When an on‐demand PDCH is not used for GPRS traffic it will be returned to the CS domain after some time.
(OML TC) (G12) assoc rece itt and time
Oneway Path A connection through the GS which provides communication in one direction. If a terrestrial resource is connected to one bothway path and one oneway downlink path the same information will be transported on both the paths in the downlink direction.
Operation and Maintenance Link (OML) A signalling link for operational and maintenance signalling on the Abis interface.
Operation and Maintenance Link (OML) Serves the Network Management Procedures of layer 3.
Operation and Maintenance Link for Transceiver Control (OML‐TC) (G01)
An OML for communication with the transceiver controller, its dedicated receiver and its dedicated time slot handlers.
Operation and Maintenance Link for Transceiver Control (OML TC) (G12)‐
An OML for communication with the transceiver controller, its associated receiver transmitter and time slot handlersiated iver, transm er slot handlers.
Operation and Maintenance Link for Transceiver Group Control (OML‐TGC) (G01)
An OML used for communication with the transceiver group common equipment. The TGC state of the transceiver controller can also be handled via (OML‐TGC) (G01) this link.
Operation and Maintenance Link for Transceiver Group Control (OML‐TGC) (G12)
An OML used for communication with the central functions, its associated interface switch, digital path, concentrator, and timing function.
Operation and Maintenance Terminal (OMT) OMT is a PC hosted application. An OMT supports the installation, configuration and maintenance of a BTS.
Originating Calls Originating calls are equivalent to random access messages, excluding page responses, received on the Abis inter‐face from MS.
Outgoing Capacity Request Please see the concept for Offered Originating Traffic Jobs.
er (ARFCN) range 1 124
Overlaid and Underlaid Subcells Subcell structures allow two separate frequency reuse patterns over an area in order to increase the traffic capacity without building new sites. A second reuse pattern is defined on top of the existing cell plan by dividing the cells into subcells. The cells using the second reuse pattern are called overlaid subcells and the subcells using the original reuse pattern are called underlaid subcells.
Overlapping GERAN/UTRAN Cell The GERAN/UTRAN cell for which the MS can read the system information, including the LAI and Cell Identity or 3G Cell Identity, when the MS is within GERAN/UTRAN coverage.
P‐GSM 900 Band Frequencies in the 900 MHz band, in the range 890‐915 MHz uplink and 935‐960 MHz downlink, in the Absolute Radio Frequency Channel Number (ARFCN) range 1 124Numb ‐ .
P‐GSM 900 Channel A channel where the ARFCN is in the P band for non‐hopping channels. For hopping channels, all ARFCNs must be in the P‐GSM 900 band.
P‐GSM Mobile A Mobile Station that within the GSM 900 bands can be assigned to P‐GSM channels only.
Packet Control Unit (PCU) The PCU is responsible for packet routing in the BSC. It implements the following protocol layers:
Network Service (NS) based on IP or Frame RelayBase Station System GPRS Protocol (BSSGP)Radio Link Control (RLC), for GERAN onlyMedium Access Control (MAC), for GERAN onlyPhysical layer on the Abis interface, for GERAN only
Flow text A Flow text are one or more activa d PDP con ex
Generic Access Packet Switched Procedures (GA‐PSR), for GAN only
Internet Protocol
Packet Data Channel (PDCH) A logical channel used for the transfer of GPRS packet data and related control signalling.
Packet Data Unit (PDU) Logical grouping of information which includes user data and a header containing control information.
Packet Flow The data transmission related to PDP contexts that share the same packet flow context, constitute one packet flow to one MS.
Packet Flow ContextPacket Con A Packet Flow Context is shared by one or more activated PDP contexts Packet Con is sh d by te t ts with identical or similar negotiated QoS profiles for one MS.
Packet Gateway (PGW) Functional unit in the BSC consisting of RPs together with application software. It handles packet transmission on the Abis interface.
Packet Idle Mode The MS has no ongoing TBF and listens to Paging and System Information.
Packet Switched Domain (PSD) The domain where Packet Switched calls (GPRS connections) are handled. The PSD is dependent on the CSD to provide it with channels usable for PS connections.
Packet Switched Generic Access Handler (PGH) The RP part of the BSC PCU application used by GAN.
Packet Transfer Mode The MS has an ongoing TBF.
ng UL itd Thi message itt d the SGSN and con ns an LLC PDU and
Paging CS Queue A queue in the BSC which buffers 3GPP TS 48.008 PAGING messages and 3GPP TS 48.018 PAGING CS messages.
Paging Groups A set of paging blocks which the MS listens to. For CCCH the set depends on the IMSI only. For PCCCH the set depends on the IMSI and SPLIT_PG_CYCLE. There are up to 704 different paging groups for 3GPP TS 44.060 PACKET PAGING REQUEST which are to be sent out on the PPCH. The actual number depends on the number of PBCCH blocks used. There is one queue for each Paging Group and one special queue for mobiles not using DRX.
Paging PS Queue A queue in the BSC which buffers 3GPP TS 48.018 PAGING PS messages.
Paging UL UnitdataPagi _Un ata This message is transmitted to the SGSN and contains an LLC PDU ands is transm e to tai ‐ control information.
Parameter Data Data associated with the system, that is, permanent exchange data and data set and modified by commands.
Parent Exchange In this context, a parent exchange is the exchange whose central processor controls the TRI. Examples of a parent exchange are the Mobile services Switching Center, MSC or the Base Station Controller, BSC. See also 'Control Signalling Link'.
Path Loss Criterion Criterion for evaluation according to the path loss comparisons.
Payload Type Indicates if the RLC/MAC block is a data block or a control block.
PCM Line A PCM line is (in this context) a transmission line that follows the CCITT G.703 recommendation.
11 UL) EGPRS MCS 1 MCS 9 and GPRS CS 1 CS 4
PDCH Capability (PDCHCAP) PDCHCAP specifies the Coding Scheme (CS) capability (for GPRS), theModulation and Coding Scheme (MCS) capability (for EGPRS), the Downlink Level A Modulation and Coding Scheme (DAS) and the Uplink Level A Modulation and Coding Scheme (UAS) capability (for EGPRS2‐A) of a PDCH. The capabilities are:
Basic GPRS PDCH. Supports GPRS CS‐1 and CS‐2.GPRS PDCH. Supports GPRS CS‐1 to CS‐4.EGPRS PDCH. Supports EGPRS MCS‐1 to MCS‐9 and GPRS CS‐1 to CS‐4.
RTTI PDCH. Supports EGPRS MCS‐0 to MCS‐9 and GPRS CS‐1 to CS‐4.
RTTI and IAN PDCH. Supports EGPRS MCS‐0 to MCS‐9 and GPRS CS‐1 to CS‐4.E2A PDCH. Supports EGPRS2‐A (DAS‐5 to DAS‐12 DL and UAS‐7 to UAS‐11 UL) EGPRS MCS 1 to MCS 9 and GPRS CS 1 to CS 4 , ‐ to ‐ ‐ to ‐ .
PDCH Equivalent PDCH equivalent is a common unit for expressing the capability of PDCHs. The capabilities of the different types of PDCHs correspond to the following number of PDCH equivalents:
PDCH Pair Two PDCHs on adjacent Timeslot Numbers (TN).
PDCH Preemption The action performed to remove an on‐demand PDCH from the Packet Switched Domain in order to use it in the Circuit Switched Domain.
gna rength s are d cells the penalty lis The
PDP Context One PDP context contains one QoS profile.
Peak Bitrate The peak bitrate is the R97 equivalent to the R99 maximum bitrate. Peak bitrate is part of the R97 QoS Profile IE as defined in 3GPP TS 48.018.
PEG Counter (PC) (Event counters). This type of counter indicates the number of events that have occurred. The counter may only be incremented.
PEG Counter (PC) Shows the accumulated number of events or the accumulated value of a counter. Can only be incremented.
Penalty (GSM Cells) Locating handles two kinds of penalties for GSM cell candidates. The signal strength demands are increased for cells in the penalty lists Thesi l st demand increase for in ts. first penalty is for cells abandoned due to urgency conditions or cells to which unsuccessful handover has occurred. The second penalty is valid for a limited duration the first time a cell appears as a neighbour. The cell is punished if it is on a lower hierarchical layer than serving cell with the same system type. Cells belonging to other system types than serving cell irrespective of layer are also punished.
Penalty (UTRAN Cells) When unsuccessful handover to UMTS has occurred, the UTRAN cell candidates are punished by not allowing UTRAN candidates in the candidate list during a certain time.
Percentile Value The percentile value is a proportion of samples in a distribution that a specific sample is less than or equal to.
t A d Obj ass as permanently en it
An example: The 90 percentile value for a distribution is the value for which 90 percent of the samples have values equal to or lower than.
Periodic Distribution State The state for periodic distribution of TRH load. If the state is ACTIVE periodic rearrangement occurs.
Periodic Rearrangement The moving of LAPD links from highly used TRHs to TRHs with enough free capacity at regular intervals, as defined by the operator in commands.
Periodic Test A periodic test is a test of specified cells or of all cells in the Base Station Controller. The test is performed at a specified time and with a specified interval between the tests.
Permanent FaultPermanen Fault A Managed Object is classified as permanently faulty when it has Manage ect is cl ified faulty wh has toggled in and out of fault situations too many times within a certain time period. The underlying fault condition may disappear but the permanent fault will remain. Manual intervention is required to bring such equipment back into operation.
Permanent Virtual Circuit (PVC) A permanent path through the network, its definition will be removed only by operator command.
PGW Defragmentation The defragmentation procedure is used to ensure optimal device usage. The devices are moved within one PGW RP to get contiguous ranges of free devices in case of definition of new Super Channels or relocation of Super Channels from other PGW RPs.
MCS 5 MCS 8 DAS 5 DAS 12 or UAS 7 UAS 11 PAN ena
PGW Redundancy Principle The BSC has PGW redundancy when all Super Channel Groups on any PGW RP can be moved to other PGW RPs. That is, when there is enough free capacity in other PGW RPs.
Physical Link Layer responsible for transmission and synchronization of data between the BSC and BTS.
Physically Loadable Unit (PLU) A managed object with the property that it requires SW files to be loaded from the BSC. This property is indicated by the function code PLU owner.
Piggybacked ACK/NACK (PAN) A PAN report is a short ACK/NACK report that is embedded in an RLC data block. The PAN report is added without changing the original amount of data contained in the host RLC data block. PAN reports can only be added to blocks sent in FANR mode, and with MCS‐1 to MCS‐3, MCS 5 to MCS 8 DAS 5 to DAS 12 or UAS 7 to UAS 11 PAN enables‐ to ‐ , ‐ to ‐ , ‐ to ‐ . bles earlier resending of missing blocks for EGPRS, or EGPRS2A sessions. It also makes it possible to increase the share of radio resources used for data blocks, which means that a higher throughput can be achieved.
Pipe Capacity The amount of downlink data that is in transport from server to MS. It is estimated as the bandwidth of the radio link multiplied by the end to end round trip time between server and MS. The bandwidth of the radio link is assumed to be the bottleneck. In order to fully utilize the available radio link bandwidth, the minimum size of the TCP send window shall not be smaller than the pipe capacity.
Plesiochronous Digital Hierarchy (PDH) Conventional multiplexing technology for network transmission systems.
on a per call
Point to Point BVC (PTP BVC) A logical link connecting BSSGP protocol entities on either side of the Gb interface. For GERAN there is one PTP BVC per cell and SGSN relation. For GAN there is one PTP BVC per GAN‐CGI and SGSN relation.
Poll Channel An unreserved UL channel used to acknowledge the blocks sent for a DL TBF (RLC acknowledged mode). The possible poll channels for a particular GPRS multislot class are the same as the channels which may be PDCH reserved in the UL direction.
Pooled Traffic Link The path through the group switch is set up per call basis between the transmission device RBLT and the transcoder device.
Pooled Transcoder The transcoder is allocated and connected to the RBLT through the GS on a per call basis basis.
Port A port with its associated number represents an endpoint or ”channel” for network communications. Port numbers allow different applications on the same computer to use network resources without interfering with each other. Port numbers are defined in the layer 4 (UDP, TCP) part of the header information.
Positioning Measurement Calculation of a location estimate for a mobile station.
Pre‐Post Service A device in Pre‐Post Service state, PPS, is administratively disconnected and unable to handle traffic.
ure e unsc d d upgra e one or more prev MO
Pre‐Post Service State (PPS) A managed object instance is said to be in PPS when it has been defined but is not in service. When a managed object instance is in state PPS there will be no communication between the BSC and the BTS for that managed object instance.
Precedense Priority Class. Precedence is part of the R97 QoS Profile IE as defined in 3GPP TS 48.018.
Preemption The act of acquiring a busy channel resource.
Preemption of Multislot Connection, Downgrading The act of acquiring a busy channel resource by downgrading a flexible multislot connection in the procedure preemption Handling.
Premature UpgradePremat Upgrad An unscheduled upgrade of one or more previously downloaded MOsAn he ule d of iously downloaded s. After a premature upgrade the downloaded software, in the flash memory, will be started on the BTS. An unscheduled upgrade can be initiated by an automatic load, for example at a large restart.
Primary Dedicated PSET A PSET containing at least one dedicated or semi‐dedicated PDCH.
Primary Dedicated PSET A PSET containing at least one dedicated or semi‐dedicated PDCH. The primary dedicated PSET always conforms to the chosen strategy regarding non‐hopping PDCHs on the BCCH frequency.
Primary Fault The real fault, in hardware or software, that caused the problem.
Priority Connection A connection that has the Queuing Allowed indication set in the ASSIGNMENT REQUEST or the HANDOVER REQUEST message at allocation of a TCH, or in the VGCS/VBS ASSIGNMENT REQUEST message at allocation of a VGCH.
Priority Level For each connection the priority level can be received from the MSC in the ASSIGNMENT REQUEST, the VGCS/VBS ASSIGNMENT REQUEST and the HANDOVER REQUEST messages. Different priority levels can be assigned by the MSC for different connections. The BSC can use these in order to handle connections differently.
Priority List Defined as an ordered list of resource types. The order within the list indicates the priority with which a resource type should be allocated.
Priority Profile A Priority Profile consists of 16 priority levels, each with a percentage of channels which are inaccessible for the priority level, and the probability of failure percentage to allocate the last accessible channel for the priority level. The inaccessible channels specified for a priority level are therefore indirectly reserved for the other priority levels in the priority profile.
Probability of Failure The allocation of the last remaining accessible channel for a priority level is done on a random basis. Probability of failure indicates the likelihood of failure of allocation in this case.
Processor Load The processor load is defined as the percentage of time that the processor spends executing tasks above a certain priority level.
Program Load of Managed Objects Program load is the process in which only the specified managed objects in BTS which are in service are checked or loaded with predefined software files.
PS Traffic Frame A PS traffic frame is an HDLC frame containing PS speech traffic (SAPI 12). The PS traffic includes payload, signalling on PDCHs, and P‐GSL control traffic.
PSD Idle List (PIL) A list per cell of on‐demand and semi‐dedicated PDCHs not carrying traffic. The list is used when searching for a suitable PDCH for preemption.
PSD Idle List Timer (PIL Timer) Used to keep track of when on‐demand PDCHs in the PIL are to be returned to the CSD from the PSD and also to keep track of when semi‐dedicated PDCHs are to be deactivated.
PSET A set of packet data channels which can be used together for a TBF.
PSET A set of PDCHs, which can be used together for a TBF. A PSET can contain any mixture of B‐PDCH, G‐PDCH, E‐PDCH, and E2A‐PDCH. All PDCHs, or a subset can be used in a TBF in accordance with the GPRS multislot class of the MS and the MS Capability (GPRS ,EGPRS, or EGPRS2A, or a combination of these). A PSET can contain a maximum of 8 PDCHs, for an extended range cell the maximum is 4 PDCHs.
PSPRIO Indicates if there exist channels in the TCH group that are allocated to the PS domain. If that is the case the TCH group is not preferable to use for a CS connection.
Pulse Code Modulation (PCM) Speech coding used for speech transfer between different nodes, for instance over the A‐interface. Two different coding schemes are used:
A‐law, mainly used in ETSI networks using transmission format E1.
µ‐law, mainly used in ANSI networks using transmission format T1.
Puncturing Scheme Puncturing is the term describing the removal of bits from a convolutionally encoded radio block prior to transmission in order to conform to the allowed radio block size (456 bits for GMSK, 1384 bits for 8‐PSK). The puncturing scheme identifies the positions of the bits which shall be removed, see 3GPP TS 45.003.
QoS Priority The Quality of Service priority controls how to share resources, queue data and schedule concurrent data flows. There are five QoS priorities:
QoS Weight The Quality of Service weight controls the quotient of scheduling a TBF will get relative to other TBFs, with the same QoS priority and sharing the same PDCHs.
dio Block dio bloc are num ere sequenti or 0 11 Thi
R97 QoS Quality of Service based on R97 QoS Profiles that are mapped to R99 QoS Profiles.
R99 QoS Quality of Service based on R99 QoS Profiles that are negotiated by means of PFM.
Radio Block For a packet switched channel, a radio block is a sequence of 4 TDMA frames used to convey an RLC/MAC block over the Um interface (one exception is the radio block occasionally used on the PACCH consisting of a sequence of four access bursts, each carrying a repetition of one short RLC/MAC block).
A block of 456 or 1384 coded bits carries one radio block, depending on whether GMSK or 8‐PSK modulation is used.
Radio Block NumberRa Number Radio blocks are numbered in sequential order from 0 to 11 ThisRa ks b d in al der from to . s sequence of frames is mapped onto a 52‐multiframe.
Radio Connection Quality Supervision (RCQS) A generic term for those functions that supervises the quality of the radio connections.
Radio Interface Terminal A radio interface terminal is a terminal connected to the radio selector.
Radio Network Expert The Radio Network Expert (RNX) is an external processing unit connected to the BSC. It collects and interprets the event data supplied by the BSC.
Radio Selector The switching equipment in the TRI‐EM.
Radio Signalling Link (RSL) A signalling link for traffic signalling on the Abis interface.
Received Measurement Data Data associated with a connection, that is, data in the 3GPP TS 48.058 message MEASUREMENT RESULT as well as information on 'Actual RF Power Class'.
Receiver (RX) (G01) A managed object and a logical unit. It provides the RF reception functionality for a transceiver.
Receiver (RX) (G12) An application object. It provides the RF reception functionality for a transceiver.
Recording Area The area in which one MS is recorded. It can be recording within Access cell, recording within access cell and defined neighbouring cells or recording within the BSC.
Recording Data Recording data collected for specific measurements/tracings in ROS.
Recording Details Describes the status of the ongoing recording in ROS.
Recording Identity The recording identity is an alphanumeric string which defines a specific recording individual.
Recording Individual Recording individual specifies recording definition data. It is uniquely identified by its recording identity
Recording Reference An identifier for the MS connection, which is received in the message TRACE INVOCATION.
Recording Segment The period of time for which recording is performed for a certain set of frequencies.
Recording Type CTR Defines if the recording is performed on CTR event, or CTR event and measurement data.
RRBP and ES/P h or poll response ti
Recording Type MTR Defines if the recording is performed on MTR event, or MTR event and measurement data, and how the recording will be presented (alpha numeric printout or/and file output).
Recordings Lost Data Data used to specify the period when the recording events are lost because of APG failover.
Start time (hour, minute, second)Stop time (hour, minute, second)
Reduced Transmission Time Interval (RTTI) An EGPRS and EGPRS2A functionality that will reduce the transfer time over the radio interface. A TBF in TTI mode RTTI will be scheduled over PDCH pairs every 10 ms. An MS in RTTI mode will use CES/P instead of RRBP and ES/P which will lead to shorter poll response time whic will lead to sh ter me.
Regional Processor Integrated (RPI) The RPI is a regional processor integrated on some Generic Ericsson Magazine (GEM) based AXE boards (for example, TRA R6/R6B/R7 or GS890 HW). RPI combines Regional Processor (RP) and Device Processor (DP) software functionality in one processor.
Regional Processor type Device (RPD) RPD supports regional processing and communication between the central processor and the SNT. The RPD consists of application software and hardware. The hardware consists of one circuit board called TRHB.
Regional Processor with Group Switch Interface (RPG) RPG supports regional processing and communication between the central processor and the SNT. An RPG consists of application software only.
IP d t (RIP) IP k end po t ou ide the BSC d fined an IP and
The denotation RPG1_2 stands for RPG with group switch versions 1 or 2, while RPG3 stands for RPG with group switch version 3.
Regional Processor with PCI Interface (RPP) RPP contains hardware to support GPRS in the BSS. Several RPPs can be connected together in a PCU over the Ethernet bus.
Regional Software Unit The software loaded onto the transcoder board. It consists of RPI and Full Rate (FR), Half Rate (HR), Enhanced Full Rate (EFR), Adaptive Multi Rate FR (AMR FR) and Adaptive Multi Rate HR (AMR HR) software for the DSPs.
Relative Reserved Block Period (RRBP) Specifies when the MS shall transmit Control Blocks.
Remote IP End Point (RIP)Remote En Poin An IP Network end point outside the BSC defined by an IP address andAn Networ in ts , e by address an IP port.
Remote Mode (G12) When a service object is in remote mode it, and its related application objects are able to communicate with the BSC.
Remote OMT An OMT physically connected to BSC and communicating with BTS using LAPD within a dedicated PCM time slot.
Remote OMT over IP (ROMT/IP) An OMT connected to BSC over TCP/IP network and communicating with BTS via an Abis Operation and Maintenance Link (OML).
Remote Transcoder Lost Fault TRA synchronization fault detected with relation to the TS mode.
l e e or the ra a multi t
Required Idle Threshold Low threshold expressed as a percentage of idle resources in the transcoder pool. Below this threshold, the transcoder pool is a candidate for taking resources for reconfiguration from another transcoder pool.
Resegment Indicator An indicator which tells the transmitting side if RLC data blocks are allowed to be split into two parts when they are retransmitted in acknowledged mode TBFs.
Reserved TCH The term Reserved TCH is used to denote TCHs which are reserved by the function Differential Channel Allocation.
Resource Level Downgrade Release of resources, in order to decrease the data rate for a multislot connection.
Resource Level UpgradeResource Leve Upgrad Seizure of resources in order to increase the data rate for a multislotS izure of resources, in der to increase data te for slo connection.
Resource Type A resource type is defined as a combination of channel type (SDCCH, TCH), subcell (overlaid, underlaid), channel rate and speech version.
Resource Type A resource type is defined as a combination of the following components:
Cell or subcell (overlaid, underlaid)Channel type (SDCCH, TCH)Channel rate (FR, HR)Speech version (Speech version 1, Speech Version 2, Speech Version 3, and Speech Version 5)
erred
Resource Type Priority List A resource type priority list is defined as an ordered list of resource types. The order within the list indicates the priority with which a resource type should be allocated.
Rf Power Capability Maximum output power of Mobile Station.
RIR Configuration The Radio Interference Recording (RIR) configuration includes distribution of the measurement frequencies to the TRXs. If a cell is deactivated it also includes setup of the TRXs in order to perform the recording.
RLC Data Block An RLC Data block is the part of an RLC/MAC block carrying user data or upper layers' signalling data.
RLC Data Unit A segmented part of an LLC‐PDU. Contains the actual data which is transferredtransf .
RLC Data Unit Data from one or more LLC‐PDUs that is transferred in an RLC data block.
RLC Mode Indicates if a TBF should operate in acknowledged or unacknowledged mode. In acknowledged mode, each RLC data block may be retransmitted several times before being successfully received. In unacknowledged mode, each RLC data block is transmitted just once; missing blocks are replaced by filler octets (GPRS TBF) or by the output from the channel decoder (EGPRS TBF) in the receiver.
The RLC/MAC block ruc ure differs GPRS and EGPRS The RLC/MAC
RLC Mode Indicates if a TBF should operate in acknowledged or unacknowledged mode. In acknowledged mode, each RLC data block may be retransmitted several times before being successfully received. In unacknowledged mode, each RLC data block is transmitted just once; missing blocks are replaced by filler octets (zeroes) in the receiver.
RLC/MAC Block The PDU exchanged between RLC/MAC entities. Distinct RLC/MAC block structures are supported for data transfer and for control message transfer.
The RLC/MAC block structure for control messages is common for GPRS and EGPRS, see 3GPP TS 44.060. MCS‐0 can be used for carrying an RLC control block for a TBF in TTI mode RTTI.
The RLC/MAC block structure differs for GPRS and EGPRS The RLC/MAC st t for . block for GPRS data consists of a separate MAC header and RLC data block. The RLC/MAC block for EGPRS data consists of a combined RLC/MAC header and one or two RLC data blocks. For MCS 1‐6 there is one RLC data block, for MCS 7‐9 there are two RLC data blocks.
RLC/MAC Control Block An RLC/MAC block containing signalling information.
RLINKUP The maximum value of the radio link supervision counter.
RP Intercommunication Group (RPIG) A group of RPs which are connected via two RP intercommunication nets. The nets are designated Net A and Net B. Several independent applications might use the same RPIG.
RR Frame A LAPD protocol supervisory frame, used to clear a previously indicated busy condition, or to indicate that the layer 2 entity is ready to receive I frames.
RSL Radio Signalling Link. Serves the Traffic Management Procedures of layer 3.
RSU Regional Software Unit is the software loaded onto the transcoder board. It consists of the RPI and FR/EFR software for the DSPs.
RTP Stream A Real Time Transport Protocol stream of octets sent from the MS to the HBSC or from the HBSC to the MS on the UDP protocol. It is used to send traffic data between the MS and the HBSC.
RTTI and IAN PDCH (RI‐PDCH) An RI‐PDCH is a logical channel used for transfer of EGPRS2‐A (DAS‐5 to DAS‐12 DL and UAS‐7 to UAS‐11 UL), EGPRS (MCS‐1 to MCS‐9) and GPRS (CS‐1 to CS‐4) packet data and control signalling. An RI‐PDCH is an E‐PDCH, or an E2A‐PDCH that uses a TG in superchannel mode, and a TRX capable of both RTTI and PAN.
RTTI and IAN TCH (RI‐TCH) An RI‐TCH is a traffic channel, which in the packet switched domain is capable of carrying EGPRS2‐A (DAS‐5 to DAS‐12 DL and UAS‐7 to UAS‐11 UL), EGPRS (MCS‐1 to MCS‐9) and GPRS (CS‐1 to CS‐4) packet data and control signalling. The RI‐TCH is connected to a TRX capable of RTTI and PAN. It uses a TG in super channel mode.
RTTI PDCH (R‐PDCH) An R‐PDCH is a logical channel used for transfer of EGPRS2‐A (DAS‐5 to DAS‐12 DL and UAS‐7 to UAS‐11 UL), EGPRS (MCS‐1 to MCS‐9) and GPRS (CS‐1 to CS‐4) packet data and control signalling. An R‐PDCH is an E‐PDCH, or an E2A‐PDCH that uses a TG in superchannel mode, and a TRX capable of RTTI.
RTTI TBF (R‐TBF) An R‐TBF is a TBF using the TTI mode RTTI and that can use Modulation and Coding Schemes MCS‐0 to MCS‐9.
RTTI TCH (R‐TCH) An R‐TCH is a traffic channel, which in the packet switched domain is capable of carrying EGPRS2‐A (DAS‐5 to DAS‐12 DL and UAS‐7 to UAS‐11 UL), EGPRS (MCS‐1 to MCS‐9) and GPRS (CS‐1 to CS‐4) packet data and control signalling. The R‐TCH is connected to a TRX capable of RTTI and uses a TG in superchannel mode.
RXLEV The measured interference level is mapped on to RXLEV value between 0 and 63 as follows:
RXLEV Signal Level 0 less than -110 dBm. 1 -110 dBm to -109 dBm. 2 -109 dBm to -108 dBm. . . . . . .61 -50 dBm to -49 dBm.62 -49 dBm to -48 dBm.63 greater than -48 dBm.
RXQUAL Average received signal quality on serving cell.
The llow ran ven a annel on the va
SACCH Period The period of a SACCH multiframe, during which the BTS can make one measurement of the interference on an idle channel.
SAPI Service Access Point Identifier. Different functional entities within one physical entity are addressed by the SAPI.
SAPI 0 Connection A layer 2 connection used as traffic connection and/or as signalling connection.
SAPI 3 Connection A layer 2 connection used for transfer of short messages. The SAPI 3 connection is used in parallel to the SAPI 0 connection.
SAS Rank The different values of the SAS parameter are given a ranking value in order to be able to compare different TCHs from different channel groups The following rank is given to a channel depending on the valuegroups. fo ing k is gi to ch depending lue of the SAS parameter of the channel group:
210
Scheduling Decides which MS shall use the radio resources at any specific time. Done n both uplink and downlink direction.
SDCCH Combination The term is used to denote a generic channel combination supported by one BPC. It can consist of either eight logical SDCCH/8 or seven logical SDCCH/8 and a CBCH. It can also consist of the common control channels (BCCH, etc.) and four logical SDCCH/4, or the common control channels, three logical SDCCH/4 and a CBCH.
con ns those d dica d and sem d dica d PDCHs th cou not
SDCCH Group All deblocked SDCCHs are included in SDCCH groups. SDCCHs that are deblocked on the same BPC belong to the same SDCCH group.
SDCCH/8 When forming a channel combination, a Stand Alone Dedicated Control Channel (SDCCH) can be divided into subchannels. A division where eight subchannels share one timeslot is called SDCCH/8.
Second MS A second MS is an MS that together with a first MS may form an active VAMOS pair.
Secondary Channel A channel which is not the main channel.
Secondary Dedicated PSET A PSET containing at least one dedicated or semi‐dedicated PDCH. It contains those dedicated and semi dedicated PDCHs that could not betai e te i‐ e te at ld be placed in the primary dedicated PSET.
Secondary Fault A fault that is detected because other equipment that the reporting function is dependent on does not work properly.
Segment Time The length of a recording segment.
Selection Type A selection type is defined as a unique traffic situation. A traffic situation is a combination of Traffic case, Subcell preferred, Channel mode, Channel rate and type preferred and Speech version preferred. Each selection type is connected to one resource type priority list.
Semi‐dedicated PDCH A PDCH that is allocated by command but activated and deactivated dynamically depending on the need for packet data traffic in the cell.
itself The serv tions e 2
Semipermanent Connection A semipermanent connection is an interconnection of devices through the group switch. The interconnection setup and release is not performed on a per call basis. Transmission is supervised in the same way as for ordinary connections
Semipermanent Connection Semipermanent connection of devices is set by command and not performed on a per call basis.
Semipermanent Path A connection between two 64 kbps timeslots in the TRI‐EM.
Serial Number Consists of Geographical Scope (2 bit field), Message Code (10 bit field) and Update Number (4 bit field). The serial number is transmitted in the message header.
Service Object (SO) (G12) A Service Object carries service functions for a set of Managed Object instances including itself The service functions include Layer 2instances, including . ice func includ Layer termination and Layer 3 distribution. They may further include SW loading, forwarding of loaded SW to other Managed Objects, and supervision of HW and SW. The following Managed Objects are Service Objects: Central Functions (CF) and Transceiver Controller (TRXC).
Service Outage Time The time from the last poll request message to the 48.018 FLUSH‐LL message is received.
Serving Cell The cell where the MS has an allocated channel.
Serving GPRS Support Node (SGSN) The SGSN performs packet routing to and from the SGSN service area. It also performs authentication, ciphering, IMEI check, control and monitoring functions, and storage of data related to packet data Mobile Stations.
Signa ng BVC A l cal li connecting BSSGP pro oco entities on er the Gb
Severely Errored Second A one second period which contains more or equal to 30% errored blocks or at least 1 defect.
SGSN Pool Area An SGSN Pool Area is an area within which an MS may roam without need to change the serving SGSN node. One or more SGSN nodes in parallel serve a pool area. All the cells controlled by a BSC belong to the same one (or more) pool area(s).
Short MS Release The actions performed when releasing the connection to the MS and the MS is known not to be tuned to the channel.
Signal Strength Criterion Criterion for evaluation according to the signal strength comparisons.
Signalling BVClli A logical link connecting BSSGP protocol entities on either side of the Gb ogi nk t l eith side of interface. The signalling BVC transports management messages to control layer 3 across the Gb interface. All BSSGP messages which are not for delivery to a Point to Point BVC are sent on the signalling BVC.
Signalling Only Connection A connection used for system signalling during a call setup before a traffic connection is established.
Signalling Point A node in a signalling network.
Signalling Type The Signalling Type in the BSC is either CCITT or ANSI based Signalling No7.
Singleslot Connection A singleslot connection is a traffic connection where only one traffic channel is used. The channel rate is either fullrate or halfrate. A singleslot connection does not have a main channel.
or thus the noun soft
Slave PDCH A PDCH containing PACCH and PDTCH.
Sleep Mode An MS is in sleep mode when it is only listening to its own paging group. This reduces MS power consumption.
SNT A Switching Network Terminal, SNT, is an equipment connected to a Group Switch.
Soft Combining Soft bit information, that is, bit information before channel decoding, is combined where different transmissions of the same RLC data unit which have had a matching MCS and puncturing scheme applied.
Soft‐Store In order to support IR, the MS stores several versions of the same RLC data block until it has been successfully decoded. This is called soft storing; thus the noun soft storest ing; store.
Speech Codec A Speech Codec is a combination of a channel rate and a speech version. Enhanced Full Rate (EFR) speech codec is the Fullrate (FR) channel rate using Speech Version 2 for GSM mobile telephony. FR speech codec is the FR channel rate using Speech Version 1. Half Rate (HR) speech codec is the HR channel rate using Speech Version 1. The AMR FR speech codec is the FR channel rate using Speech Version 3 and the AMR HR speech codec is the HR Channel Rate using Speech Version 3. The AMR‐WB speech codec is the FR channel rate using Speech Version 5.
Speech Quality The RXQUAL, BER and FER data collected on the uplink in the BTS are used to calculate the subjective speech quality of the uplink speech.
Speech Quality Index The momentary speech quality for an ongoing speech call.
Speech Version The variant of speech encoding algorithm within the same channel rate. There are four speech versions, Speech Version 1, Speech Version 2, Speech Version 3, and Speech Version 5.
Spontaneous MO Reset This means that the Managed Object has changed state, without BSC control, to Reset. It is not in operation and must be brought back to an operational state.
Stall Condition An MS is only allowed to transmit data blocks within its transmit window. The size of this window is dependent on whether a GPRS or EGPRS TBF is being used. In the case of an EGPRS TBF, the window size is dependent on the number of timeslots allocated to the TBF. For a GPRS TBF the window size is fixed.
If the RLC transmit window cannot advance then the TBF is said to be stalled. The oldest unacknowledged block within the stalled transmit window must be positively acknowledged before the stall condition can be cleared. Once this occurs the transmit window can advance.
Stand Alone BSC A BSC without a TRC. It must be connected either to a BSC/TRC or to a TRC. The BSC part controls the radio network and the TRC part contains and controls the transcoder resources and the terrestrial resources on the A‐interface and Ater‐interface.
Standby RP An RP with hardware and software configured, operational but not currently in use by the application.
Status Counter (ST) (Level counters). This counter shows the current status or number of events that are occurring at present. The counter may be incremented or decremented.
Status Counter (ST) Shows the counter value at a specific moment (that is, a snapshot). Can be incremented or decremented.
Stealing If there is insufficient BTS equipment to fully satisfy the configuration requirement, equipment may be taken away from a low priority channel in order to be used for a higher priority channel. This is known as stealing.
Stealing can affect anything from one BPC up to all the BPCs in a Channel Group and is not subject to the HG by HG restriction of Minimum Disturbance.
Streaming Class Used for real‐time traffic flows with moderate delay requirements. Examples are real time video and real time audio.
Streaming PFC A PFC that is used for Streaming. A PFC is identified as Streaming if there is support for Streaming in the cell and the demands on Transfer Delay are low (Transfer Delay in ABQP may be higher than 800 ms).
Streaming TBF A TBF with an active PFC with QoS priority Streaming as the highest priority PFC.
Structured Procedure An initial request message its accept message and its response from BTS. A Structured Procedure concerns only one Managed Object.
STS Statistics and Traffic Measurement Subsystem. /--------------------------------------\ | | | COUNTERS IN THE |
Counters are collected periodically from the traffic application to the Measurement Database (DB).
The report programs fetch information from the DB when a report shall be produced.
Di tion uations ting eva uation ere the mos suit connection su
Reports are produced according to a time table, which is specified for each report.
Sub‐Circuit–Identity–Code (SUB‐CIC) The sub‐CIC is a bitmap indicating which part of the traffic connection that is used.
Subcell The channel groups in a cell can be divided to form two subcells with different frequency reuse patterns. A subcell can either be underlaid or overlaid.
Subcell Change Subcell change is a channel change between two channels in the same subcell.
Subcell Data Subcell data is data that can be defined per subcell.
Subcell Load Distribution EvaluationsSubcell Load stribu Eval Locating evaluation where the most suitable connection for subcell loadLoca l wh t able for bcell load distribution is identified.
Subcell Load Distribution Time Interval The time interval specified by the operator, which when expired initiates the checking of the level of idle full rate capable TCHs in the underlaid subcell in cells active for subcell load distribution.
Subcell Type There are two different subcell types: Overlaid subcell: A subcell which is defined "on top" of an underlaid subcell and is part of a different frequency reuse pattern. The common control channels are shared between the overlaid and underlaid subcells.
Underlaid subcell: A subcell with an associated overlaid subcell. The underlaid subcell inherits the characteristics of the cell.
annel se GPRS on one TCH GPRS d dica d anne
Subdevice The subdevice indicates which part of the device that is used in the connection.
Subgroup At channel allocation for Packet Switched Connections, the TCH group is divided into two subgroups.
TN 0 1 2 3 4 5 6 7 / - -- - - - -- - \ /---------------\ \---------------/ \ - -- - - - -- - / sub sub group 0 group 1
Only one channel set for GPRS can be allocated on one subgroup, that is, two channel sets for GPRS on one TCH group GPRS dedicated channelstwo ch ts for group. e te ch ls is allocated in subgroup 1 only.
Submeasurements Measurements are made on the subset of TDMA frames in which it is guaranteed that the MS is always transmitting.
Subordinate Switching Network Terminal (SUBSNT) A part of an SNT unique to ET155 that can be configured, blocked, tested, deblocked. A SUBSNT consists of one or several boards.
Subrate Defines together with subchannel the Subrate physical channel.
Subrate Physical Channel A physical channel utilizing a fraction of n*8 kbps (in adjacent bits in one octet) of a 64 kbps link.
Subrate Switching Subrate switching (SR) is switching in the group switch at a rate lower than 64 kbps.
d d then pac s ng a par ar call are sen a thi
Super Channel (SC) Set of contiguous Abis paths that are used as one wideband channel.
Super Channel Group (SCGR) Set of one up to four Super Channels (SC) that terminate in one BTS.
Super Channel Mode (SCM) A transmission mode of a Transceiver Group (TG) in which several LAPD links and traffic channels share a Super Channel for transferring data.
Supplementary/Polling Bit (S/P) Used in the header of an RLC/MAC block to indicate whether or not the RRBP is valid.
Switched Virtual Circuit (SVC) In an SVC system a suitable path between source and destination is first decided then all packets belonging to a particular call are sent via thisecide all ket belongi to ticul t vi s path.
Switching Network Terminal (SNT) An equipment connected to a Group Switch via a digital link (DL).
Switching Network Terminal Inlet (SNTINL) Indicates where in the SNT the devices shall be connected.
Synchronisation Delay The combined value of the Distribution Delay on External Timing Bus and the Transmitter Chain Delay, so as to provide synchronized transmission of all TGs in the cluster.
Synchronous Digital Hierarchy (SDH) Standard technology for synchronous data transmission on optical media and provides faster network interconnection than traditional PDH equipment.
Synchronous Transport Module (STM‐1) The ETSI standard for a 155 Mbps interface to an SDH network.
the MS the ne k
System Type The system type defines the standard to follow, and is either GSM 800, GSM 900, GSM 1800 or GSM 1900.
T1 Digital transmission format used in ANSI and TTC. T1 signal format carries data at a rate of 1.544 Mbps and can carry 24 channels of 56 kbps.
T11 An assignment timer that represents the maximum time a Priority Connection can stay in a queue (see, 3GPP TS 48.008).
T3208 MS timer. T3208 is used by the MS in CCN mode to decide when to stop waiting for network assistance for the cell reselection.
T3212 T3212 timeout value. Defines the time out value that controls the location updating procedure, that is, when notifying the availability of the MS to the network to twor .
TA Positioning A method in which the BSC provides TA value and Cell Identity to the network for location estimate calculations.
TAAVELEN Number of values in moving average of timing advance.
TAI Individual The PDCH chosen, among the PDCHs in a TBF, to carry the TAI.
Tandem Free Operation (TFO) A standardized method to avoid double speech encoding and decoding in the transcoders, in MS to MS calls. It requires that the speech frames, embedded into PCM signal, can be transmitted transparently through all equipment in the path between the transcoders.
TBF Limit A limit for mean value of all PDCH reservations on all PDCHs in a cell, UL or DL, above which PDCH reservations are allowed but should be avoided. The TBF limit is used when checking for a possible request for more on‐demand PDCHs and is checked per PDCH Capability.
TBF Mode Specifies whether a TBF is using GPRS or EGPRS.
TBF Mode (detailed version) Specifies whether a TBF is using GPRS or EGPRS. In the PCU, there is a requested TBF Mode which may be assigned values EGPRS or GPRS and a response called Established TBF Mode which may be assigned values EGPRS, restricted EGPRS, GPRS or basic GPRS. Restricted EGPRS may occur due to parameter PSKONBCCH and limits the modulation to GMSK (MCS‐4 at the most). Basic GPRS may handle CS‐2 at the most.
TCH Capabilities Indicates the capabilities of a physical channel with respect to the channel rate, additional assignment and also indication of how, and to what extent, it can support combinations of half rate channels in the same basic physical channel.
TCH Capabilities Group TCH Capabilities Group is a group of physical channels supporting the same TCH Capabilities.
TCH Group A group of traffic channels with the same frequency characteristics. A TCH group may consist of up to eight BPCs used as TCHs.
All deblocked full rate TCHs are included in TCH groups. The traffic channels in the PSD may form a PSET, and in the CSD may be used together in a HSCSD call. TCHs in the same TCH group have the same properties on the following data:
TCH A group c anne the same arac s A
For non‐frequency‐hopping channels:
Cell or Subcell (underlaid, overlaid)Training Sequence CodeFrequency
For frequency hopping channels:
Cell or Subcell (underlaid, overlaid)Training Sequence CodeHopping Sequence NumberMobile AllocationMobile Allocation Index Offset
TCH Group Group A group of traffic channels with the same frequency characteristics A of traffi ch ls with frequency ch teri tics. TCH group may consist of up to eight BPCs used as TCHs.
TCH/F This concept is used when referring to a Full Rate TCH. If full rate is used, there is one TCH/F per time slot in the air interface.
TCH/H This concept is used when referring to a Half Rate TCH. If half rate is used, there are two TCH/H per time slot in the air interface.
Temporary Block Flow (TBF) A logical connection between the MS and the PCU. A TBF is used for either uplink or downlink transfer of GPRS packet data. The actual transfer is made on PDCHs.
Temporary Flow Identity (TFI) An identity which identifies a TBF (uplink or downlink) on all PDCHs used for the TBF.
Temporary Inactive Period A period during which an MS may stop sending RLC data blocks uplink and only send dummy RLC data blocks.
Temporary Mobile Station Identifier (TMSI) The TMSI is a temporary identifier, which is assigned to the mobile when it registers in an MSC. The TMSI is used to increase subscribers' confidentiality, by avoiding sending of IMSI on the air interface. Once TMSI has been assigned to an MS, the TMSI is used by the MS to identify itself in the network.
Temporary Offset (TO) Defines a negative offset applied to Cell Reselect Offset.
Temporary Packet Flow (TPF) A Temporary Packet Flow for a PFC exists when there is data available to schedule for that PFC.
Terminal Endpoint Identifier (TEI) The TEI is used to address the different physical entities when signalling on layer 2 over the Abis interface.
Terminal Equipment The physical entities that the BSC communicates with via data links, at the BTS.
TF Comp The TF Compensation value. This must be defined for each Slave TF relative to the Master TF. It can be calculated by:
TF Comp = Distribution delay between Master TG and Slave TG + Own TG transmitter chain delay ‐ Master TG transmitter chain delay
TF Mode Sets the mode of the TF in the TG. It controls timing and synchronization relations with other TGs. The TF Modes are:
Master: Synchronized towards the synchronization source and distributing synchronization to other TFsSlave: (RBS2000 only) Synchronized towards the MasterStandalone: Synchronized towards the synchronization source. This is the default mode.
TG Cluster Between 2 and 16 co‐located TGs. The Timing Function (TF) of each TG is physically linked. One of the TGs in the cluster acts as a timing source, or master. Note that this cluster, is notional. It exists only in the structure of the defined data for the TGs, that is, the relations between the TGs are not explicit.
TG Cluster Identity An instance used to identify all TGs within one logical TG cluster.
TG‐FID A TG‐FID is a forlopp identity created for each Transceiver Group. A TG‐FID links all data relating to a Transceiver Group enabling an individual group to be independently recovered.
TGC Application (G01) TGC application is active in one and only one Transceiver Controller (TRXC) in each TG. The application handles communication to and supervision of TG common equipment; The Transmitters (TX) and the Timing Function (TF).
TGC State (G01) A TRXC is only capable of providing communication to common equipment when its TGC state is ACTIVE. The other possible TGC state is STANDBY.
Time Division Multiplexing Mode (TDM) A transmission mode of a Transceiver Group (TG) in which the Abis interface is structured into 64 kbps circuits. Each LAPD link and traffic channel uses a single 64 kbps circuit or subrate physical channel for transferring data.
Ti ng tion (TF) (G01) A managed and l cal unit It provides ti ng necessary a
Time Slot Handler (TS) (G01) A managed object and a logical unit. It provides the functionality for controlling, signalling and processing for one time slot of a TDMA frame.
Time Slot Handler (TS) (G12) An application object. It provides the functionality for controlling, signalling and processing for one time slot of a TDMA frame.
Timeslot Number Priority Order The order in which dedicated and semi‐dedicated PDCHs are allocated in order to obtain optimal PDCH reservations.
Timing Advance Index (TAI) Specifies one of the 16 PTCCH subchannels on a PDCH used by the MS to handle the continuous Timing Advance function.
Timing Function (TF) (G01)mi Func A managed object and logical unit It provides all timing necessary in a object ogi . all mi in transceiver group.
Timing Function (TF) (G12) An application object. It provides timing necessary in a transceiver group.
TLLI ‐ Temporary Link Identifier A value assigned to an MS by the SGSN which uniquely identifies the MS within a Routing Area.
TMSI Based Routing A subscriber that is already registered in one of the MSCs in a pool should always be directed to the same MSC, provided that the subscriber stays in the pool area. This is achieved by using the NRI part of the TMSI.
TN Set Value The TN set value gives an indication of how well one subgroup fulfils the allocation request for a new channel set to a PS connection.
3
At allocation of GPRS dedicated channels when the number of requested channels are between 1 to 3 a window of requested number of channels is moved over the subgroup in order to find the best place for the window. The TN set value indicates preference for a subgroup according to:
123At allocation of on‐demand PDCHs or at allocation of GPRS dedicated channels when the number of requested channels are 4, the TN set value indicates preference for a sub‐MRT according to:
123
TRA Capability TRA capability is a measure of the speech codec algorithm and data rate adaptation supported by a transcoder resource.
TRA Synchronisation Fault When the BTS detects a break in the TRA to TRX speech or data link, and this break still persists after a filtering period, then it raises a synchronization fault.
Trace Reference An identifier for the MS connection, which is received in the message MSC INVOKE TRACE.
Trace Type Specifies which type of event that initiated the trace and which kind of information that shall be collected.
Traffic Case A traffic case is a type of traffic process (for example, handover and assignment).
ma the TRXC itself
Traffic Class UMTS/GPRS bearer class 3GPP TS 23.107.
Traffic Connection A connection including one speech or data connection and one signalling connection.
Training Sequence Code (TSC) A Training Sequence Code is a known bit pattern transmitted in the middle of a normal burst and used by the equalizer to build a model of the channel.
Transceiver Controller (TRXC) (G01) A managed object. It provides communication for other managed objects instances. It consists of two parts; Transceiver Control (TC) and Transceiver Group Control (TGC).
The TC is an application in a TRXC and handles the communication to the dedicated receiver and time slot handlers. It also handles the maintenance of the TRXC itselfintenance of .
The TGC is an application in a TRXC and handles communication to the common equipment. To be able to provide communication for common equipment, the transceiver controller must have TGC state ACTIVE.
The two different parts are addressed by different addresses (Terminal Endpoint Identifier, TEI) in layer 2 signalling.
Transceiver Controller (TRXC) (G12) A service object. It provides communication for other managed objects instances. It handles the communication to the dedicated receiver, transmitter and time slot handlers. It also handles the maintenance of the TRXC itself. The TRXC is addressed by a Terminal Endpoint Identifier (TEI) in layer 2 signalling.
ver (TRH) The TRH a tiona unit cons ting RPs ther app
Transceiver Group (TG) (G01) The TG represents a set of related managed objects. The TG is in itself a managed object, however no communication with the managed object TG is possible over the Abis interface. All managed objects that belong to the same TG shares TG common equipment.
Transceiver Group (TG) (G12) The TG represents a set of related managed objects. The TG is in itself a managed object, however no communication with the managed object TG is possible over the Abis interface.
Transceiver Group Common Equipment (G01) The managed objects which are not directly related to any other managed object within a TG. The managed objects; transmitters and timing functions are regarded as TG common equipment.
Transceiver Handler (TRH)Transcei Handler The TRH is a functional unit consisting of RPs together with application is func l is of toge with lication software. It is located in the BSC and handles mainly supervision of Circuit Switched (CS) traffic and LAPD signalling.
Transceiver Handler Device The Transceiver Handler is a regional processor which is acting as a signal terminal between the BSC and the BTS. A device serves a 64 kbps PCM connection.
Transceiver Tester A Transceiver Tester (TRXT) can perform transceiver connection tests, test of emitted power and quality from the transmitter and receiver sensitivity tests within a cell.
Transcoder A transcoder handles encoding/decoding of speech and rate adaptation of data information between the format used on the MSC‐BSC interface and the format used on BSC‐BTS interface.
ace (MSC BSC) and the use on the A ace (TRC
Transcoder and Rate Adaptor (TRA) A transcoder handles encoding and decoding of speech and rate adaptation of data information between the format used over the A‐interface and the Abis interface.
Transcoder and Rate Adaptor Board (TRAB) The hardware performing the actual encoding, decoding and rate adaptation function.
Transcoder Capability The speech codec algorithm and data rate adaptation together with specific functionality, supported by a transcoder resource.
Transcoder Controller (TRC) A TRC can be a stand‐alone node or combined with a BSC (BSC/TRC).
Transcoder Device The transcoder performs transcoding of speech information and rate adaptation of data information between the format used on the A interface (MSC BSC) and the format used on the A ter interface (TRCinterf ‐ format d ‐ter interf ‐BSC) and the format used on the A‐bis interface (BSC‐BTS).
A transcoder has 5 devices. One device which sends and receives the multiplexed (and coded or rate adapted) information from the BTS and four devices which send and receive the demultiplexed (decoded) information from the MSC.
Transcoder Extension Modules TRA devices are grouped together in Extension Modules (TRA‐EMs). A TRA‐EM can handle up to 192 traffic channels, depending on the transcoder hardware version.
Transcoder Free Operation A method to avoid double speech encoding and decoding in the transcoders, in MS to MS calls. It does not need the transcoder hardware in the path.
Transcoder Pool A transcoder pool is a resource pool containing a number of transcoder resources supporting a specific channel service. From a transcoder pool, transcoder resources are seized on a per call basis. Transcoder pools are divided into subpools that contain transcoders with similar features.
Transcoder Pool Unit The minimum unit belonging to a transcoder pool. It is one MUX with four DEMUXs, if the channel rate is Full Rate (FR), and one MUX with eight DEMUXs, if the channel rate is Half Rate (HR).
Transcoder Resource A transcoder resource is the transcoder support needed for one singleslot traffic connection. (For a multislot connection a 'set of transcoder resources' is needed, that is, one or several resources.)
Transcoder Subpool A transcoder subpool is a group of transcoder resources within a pool that provide exactly the same capabilities. In addition to supporting the data rate and speech codec of the pool the resources in a subpool provide the same transcoder features as one another.
Examples of transcoder features are 14.4 kbps data and MCC.
Transcoder Subpool Group of transcoder resources with the same speech codec and features.
Transfer Delay The Transfer Delay, in the ABQP, specifies the delay tolerated by the application. See 3GPP TS 23.107.
Transit TRI‐EMG A TRI‐EMG that transits the control signalling link to a cascaded TRI‐EMG.
on dio ace (TRI) A di l cross connect on a 64 kbps l l
Transmission Device The Transmission Device is used either for signalling or for speech and data connections to the TRXC.
Transmission Device Changeover The process of moving links from one Transmission device to a new Transmission device.
Transmission Power Level There are three different maximum transmission power levels transferred to the BTS in the configuration process: BTS Maximum transmission power level for the BCCH frequency.
BTS Maximum transmission power level for frequencies other than the BCCH frequency.
Maximum transmission power level for MSs on connection.
Transmission Radio Interface (TRI)Transmissi Ra Interf A digital cross connect on a 64 kbps level gita eve .
Transmission Time Interval Mode (TTI) The TTI mode specifies whether a TBF is scheduled blocks on a per 20 ms basis (BTTI) or on a per 10 ms basis (RTTI).
Transmission Type The Transmission Type in the BSC defines which transmission system that is used to/from the BSC, and is either 24 channel PCM or 32 channel PCM.
Transmitter (TX) (G01) A managed object and a logical unit. It provides the RF transmission functionality on a time slot basis for eight TSs using different time slot numbers. It can be used by any time slot handler in the same transceiver group.
t A t t serv not any error correction proce ures or
Transmitter (TX) (G12) An application object. It provides the RF transmission functionality on a time slot basis for eight TSs using different time slot numbers. Although communicated with via the transceiver controller, it can be used by any time slot handler in the same TG.
Transmitter Chain Delay The delay within the Cabinet. There can be different delays for each TG. Elements that affect this delay are:
TransmitterCombinerFeederAntenna
Transparent ServiceTransparen Service A transparent service does not have any error correction procedures or ransparen ice does have d any flow control. This ensures a fixed throughput rate but an unknown error rate.
TRH Capacity The amount of traffic a TRH can handle without exceeding the maximum allowed TRH load.
TRH Changeover The process of moving connections and links provided on them from one TRH to other TRHs.
TRH Load The amount of TRH capacity used at any given time. This is the percentage used capacity of a regional processor device.
TRH Paging Queue A queue in every RP in the TRH which buffers 3GPP TS 48.008 PAGING messages, 3GPP TS 48.018 PAGING CS messages and 3GPP TS 48.018 PAGING PS messages.
TRI‐EM An EM that is used for the TRI function.
TRI‐EMG An EMG that is used for the TRI function.
Triggering Event Defines when a recording of a certain connection will start. Triggering events are:
Type 1 MS An MS that is not required to transmit and receive at the same time.
Type 2 MS An MS that is required to be able to transmit and receive at the same time.
Type of BCCH Broadcast Control Channel type. The type of BCCH can have the following values:
COMB. Combined control channel. The channel carries the BCCH, the CCCHs and the SDCCH/4 without a CBCH(2)/4 subchannel.
NCOMB. Non‐combined control channel.COMBC. Combined control channel. Indicates that the cell has a combined BCCH and SDCCH/4 with a CBCH(2)/4 subchannel.
UL_UNITDATA BSSGP PDU message transmitted to SGSN containing an LLC‐PDU and control information.
UL_UNITDATA Uplink Unit Data ‐ A message, containing an LLC‐PDU and control data, which is sent to the SGSN.
Um Interface The radio interface between the BSS and the MS.
Undefined Neighbouring Cell The cells on which a mobile station receives MEASUREMENT REPORTS, but the BSC does not allow handover to, are known as undefined neighbouring cells.
Undefined Neighbouring Cells Recording Measurement Reports Limit Value
The percentage limit of measurement reports for undefined neighbouring cells of all MEASUREMENT REPORTS in a cell. If this limit is exceeded for a cell on which undefined neighbouring cells recording is ordered, the undefined neighbouring cells are recorded.
Undefined Neighbouring Cells Recording Period The period during which data for undefined neighbouring cells is recorded.
Undefined Neighbouring Cells Recording State Undefined neighbouring cells recording state can be ACTIVE or IDLE. During a recording period, the state is ACTIVE.
Uni‐Directional Channel A channel used for downlink transmission only in a HSCSD multislot configuration.
Up Interface The interface between the HBSC and the MS, over an IP access network.
Update Number Differentiates between older and newer versions of the same message.
Upgrade The start of previously downloaded software on one or more Managed Objects in the BTS.
upli radio block per on thi PDCH
Uplink Line Speech Level The uplink line speech level is the reference level of a speech signal from the BTS to the BSC/TRC.
Uplink State Flag (USF) An indicator used on a PDCH to allow multiplexing of uplink radio blocks from a number of MSs. An MS is assigned a USF value for each PDCH as part of an uplink TBF establishment. When an MS detects its USF value in the header of a downlink RLC/MAC block, it is scheduled to transmit uplink as indicated by the current MAC mode and USF granularity.
Uplink State Flag (USF) Used on a PDCH to allow multiplexing of UL radio blocks from a number of MSs. A mobile is allocated a USF value for each PDCH as part of an uplink TBF establishment. When an MS reads its USF value in the MAC header of a downlink RLC/MAC block, it may send data on the next uplink radio block period on this PDCHnk iod s .
Uplink Time Difference of Arrival (U‐TDOA) A positioning method based on multiple LMUs measuring the arrival time of bursts sent on the uplink from an MS.
The difference in arrival time at different LMUs makes it possible to calculate a location estimate for the MS.
Urgency Condition An urgency condition applies if the transmission quality is too low or if the timing advance is out of range.
Urgency State An urgency state applies if the transmission quality is too bad, or if the timing advance is too large, or if the signal strength is too low, or the connection is suddenly lost.
gran the MS perm on it the nex consecu upli
User ‐ User Path A user ‐ user path is a circuit provided with transparent data transfer between equipment in which user applications reside. Users are typically provided signalling and traffic services.
User Characters Decoded characters shown in the handset. Consists of 7,8 or 16 bits received on the air interface.
User Function A user function is an external function that make use of semipermanent connections to interconnect the devices.
USF Granularity The USF Granularity is sent to the MS in each uplink assignment and decides how many uplink blocks the MS is permitted to send when it detects its assigned USF value in the MAC header of a downlink RLC/MAC block. A granularity of one block, grants the MS permission to transmit in the next uplink radio block while a granularity of four blocks grants the MS permission to transmit in the next four consecutive uplinkts issi to transm in t four tive nk radio blocks. When a granularity of four blocks is used, the network sets the USF to a reserved value not allocated to any MS in the three following downlink RLC/MAC blocks.
USP Interface The interface between the HBSC and the HSN.
UTRAN BA List An UTRAN BCCH Allocation list provides the UMFIs to be monitored by the MSs in the cell. There are two separate lists. One for mobiles in idle mode and one for mobiles in active mode.
UTRAN Cell A cell belonging to UTRAN. Only UTRAN cells of type Frequency Division Duplex (FDD) are supported. A UTRAN cell is always defined as an external cell in the BSC.
VAMOS All tion VAMOS tion means a annel an MS suc a way
UTRAN Measurement Frequency Information (UMFI) UTRAN MEASUREMENT FREQUENCY INFORMATION expressed as mfddarfcn‐mscrcode‐diversity, where:
mfddarfcn is the ARFCN for the UTRAN FDD cell, value range: 0‐16383
mscrcode is the scrambling code, value range: 0‐511diversity indicates if diversity is applied for the UTRAN FDD cell, acceptable values: DIV or NODIV
UTRAN/FDD Band Frequency in UTRAN/FDD is in either of the following paired bands. 1920‐1980 MHz uplink and 2110‐2170 MHz downlink or 1850‐1910 MHz uplink and 1930‐1990 MHz downlink. In ARFCN Range 9250‐10850.
VAMOS Allocation oca VAMOS allocation means to allocate a channel for an MS in such a way alloca to allocate ch for in h that an active VAMOS pair is formed.
VAMOS Capable BPC A VAMOS capable BPC is a BPC that can be used for two TCH FR, one TCH FR and two TCH HR, or four TCH HR channels. Six logical channels are connected to a VAMOS capable BPC.
VAMOS Neighbor The VAMOS neighbor is the other MS in an active VAMOS pair.
VAMOS Pair The VAMOS pair consists of two circuit switched subchannels, one on each VAMOS subchannel. There can be up to two active VAMOS pairs using a VAMOS capable BPC
VAMOS Subchannel A VAMOS subchannel (VSC) is a channel providing circuit switched traffic channels either one FR or two HR. A VAMOS capable BPC can provide two VAMOS subchannels, VSC0 and VSC1.
VGCS Signalling Channel A signalling channel used by an MS in order to send 44.018 NOTIFICATION RESPONSE to the BSC. The channel is released immediately after this task is performed. No A‐interface resources are allocated for this type of channel.
Voice Group Call A Voice Group Call is a multi‐party call where only one subscriber, the Voice Group Talker, is allowed to talk at a time, while the rest of the subscribers are listening. An established Voice Group Call consists of one Voice Group Signalling Connection and one or several Voice Group Channels.
Voice Group Channel A duplex TCH for a Voice Group Call, where the downlink part of the TCH is shared by all the listening subscribers in a cell.
Voice Group Listener A Voice Group member tuned to a Voice Group Channel.
Voice Group Signalling Connection A common call controlling resource established for the lifetime of the Voice Group Call. The resource is used for control signalling between the BSC and the MSC for an established Voice Group Call.
Voice Group Talker A Voice Group Talker is the subscriber that at the moment is allowed to talk during an established Voice Group Call. There are two types of Voice Group Talkers, Initial Voice Group Talker and Consecutive Voice Group Talker.
Weighted Mean Hold Time The weighted mean hold time is the mean hold time of a transcoder resource adjusted according to whether the transcoder resource has been used for less than 64 calls or greater than or equal to 64 calls.
Wideband Connection A connection which is a multiple of 64 kbps. The maximum size of the connection will depend on whether an E1 or a T1 interface is being used.
Window The window is a concept used to control the flow between units. The size of the window is the upper limit of allowed number of outstanding unacknowledged jobs sent from one unit to another. Used in for example, Ater Flow Control and RP‐CP signalling.
Window Size The window size is the upper limit on the allowed number of outstanding unacknowledged seize transmissions subject for load control. Used in Ater Flow Control.
Worse Cell A GSM cell ranked worse than the serving cell in basic ranking list.
