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RAN Feature Description Table of Contents
Table of Contents
Chapter 2 UE Behaviors in Idle Mode........................................................................................2-1
2.1 Introduction to UE Behaviors in Idle Mode.......................................................................2-1
2.1.1 Definition...............................................................................................................2-1
2.1.2 Purposes...............................................................................................................2-1
2.1.3 Terms and Abbreviations.......................................................................................2-1
2.2 Availability........................................................................................................................ 2-4
2.2.1 Network Elements Involved...................................................................................2-4
2.2.2 Software Releases................................................................................................2-4
2.2.3 Miscellaneous........................................................................................................2-5
2.3 Impact.............................................................................................................................. 2-5
2.3.1 Impact on System Performance............................................................................2-5
2.3.2 Impact on Other Features......................................................................................2-5
2.4 Restrictions...................................................................................................................... 2-5
2.5 Technical Description.......................................................................................................2-5
2.5.1 UE Behaviors in Idle Mode Configuration Model...................................................2-5
2.5.2 Overview...............................................................................................................2-6
2.5.3 PLMN Selection.....................................................................................................2-7
2.5.4 PLMN Selection in HPLMNs..................................................................................2-7
2.5.5 PLMN Selection in VPLMNs................................................................................2-10
2.5.6 Cell Selection.......................................................................................................2-11
2.5.7 Cell Reselection...................................................................................................2-17
2.5.8 Location Registration...........................................................................................2-27
2.5.9 Paging................................................................................................................. 2-30
2.5.10 System Information Reception...........................................................................2-31
2.6 Capabilities....................................................................................................................2-33
2.7 Implementation..............................................................................................................2-33
2.7.1 Enabling UE Behaviors in Idle Mode...................................................................2-33
2.7.2 Reconfiguring Parameters...................................................................................2-33
2.7.3 Disabling UE Behaviors in Idle Mode..................................................................2-34
2.8 Maintenance Information................................................................................................2-34
2.8.1 Alarms.................................................................................................................2-34
2.8.2 Counters..............................................................................................................2-34
2.9 References..................................................................................................................... 2-35
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RAN Feature Description List of Figures
List of Figures
Figure 2-1 UE Behaviors in Idle Mode configuration model..................................................2-6
Figure 2-2 UE behaviors in idle mode...................................................................................2-6
Figure 2-3 Signaling procedure for the automatic PLMN selection.......................................2-9
Figure 2-4 Signaling procedure for the manual PLMN selection.........................................2-10
Figure 2-5 Procedure for cell selection...............................................................................2-12
Figure 2-6 Signaling procedure for the cell selection controlled by the NAS (performed by the
AS)............................................................................................................................... 2-16
Figure 2-7 Signaling procedure for cell selection controlled by the NAS (performed by the
NAS)............................................................................................................................. 2-16
Figure 2-8 Measurement start criteria for cell reselection with HCS disabled.....................2-17
Figure 2-9 Cell reselection procedure.................................................................................2-26
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RAN Feature Description List of Tables
List of Tables
Table 2-1 NEs required for UE behaviors in idle mode..........................................................2-4
Table 2-2 RAN products and related versions.......................................................................2-4
Table 2-3 Automatic PLMN selection mode...........................................................................2-7
Table 2-4 UE state transition...............................................................................................2-13
Table 2-5 Parameters of the measurement start criteria......................................................2-18
Table 2-6 MML parameters that correspond to the measurement parameters....................2-18
Table 2-7 Intra- and inter-frequency measurement criteria for UE in slow movement.........2-20
Table 2-8 Inter-RAT measurement criteria for UE in slow movement..................................2-21
Table 2-9 Intra- and inter-frequency measurement criteria for UE in fast movement..........2-21
Table 2-10 Inter-RAT measurement criteria for UE in fast movement.................................2-21
Table 2-11 Parameters of the measurement start criteria....................................................2-21
Table 2-12 MML parameters that correspond to the measurement parameters..................2-22
Table 2-13 UE state transition conditions............................................................................2-27
Table 2-14 Commands for the reconfiguration on the RNC side.........................................2-33
Table 2-15 Counters related to UE behavior in idle mode...................................................2-34
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
Chapter 2 UE Behaviors in Idle Mode
2.1 Introduction to UE Behaviors in Idle Mode
2.1.1 Definition
UE behaviors in idle mode refers to a series of automatic actions for obtaining a
service before finding a network or for obtaining a better service after connecting to
the network.
UE behaviors in idle mode include:
PLMN selection
Used to ensure that the PLMN selected by the UE properly provides services.
Cell selection and reselection
Used to ensure that the UE finds a suitable cell to camp on.
Location registration
Used for the network to trace the current status of the UE and to ensure that the
UE is camped on the network when the UE does not perform any operation for a
long period.
Paging
Used for the network to send paging messages to a UE which is in idle mode,
CELL_PCH state, or URA_PCH state.
System information reception
The network broadcasts the network information to a UE which camps on the cell
to control the behaviors of the UE.
2.1.2 Purposes
When a UE is switched on, it selects a PLMN and searches for a suitable cell of this
PLMN to camp on. This feature has the following benefits:
It enables the UE to receive system information from the PLMN
It enables the UE to establish the RRC connection
It enables the UE to response to “paging” message
It enables the UE to receive cell broadcast services
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
2.1.3 Terms and Abbreviations
I. Terms
Term Description
Any cell selection In this state, the UE attempts to find an acceptable cell of any
PLMN to camp on.
Camped normally In this state, the UE obtains normal services.
Camped on any
cell
In this state, the UE obtains limited services. The UE select a
cell through cell selection/reselection. Where, the PLMN
identity is not considered.
EPLMN A PLMN considered as equivalent to the selected PLMN by
the UE for PLMN selection, cell selection, cell reselection and
handover according to the information provided by the NAS.
Ec/N0 Ratio of received energy per chip to noise spectral density.
HPLMN Home PLMN, where the MCC and MNC of the PLMN identity
are the same as the MCC and MNC of the IMSI.
URA identity UTRAN Registration Area identity. It can be used to indicate
the UE which URA it shall use in case of overlapping URAs.
VPLMN Visited PLMN. It is different from HPLMN.
Radio access
technology
Type of radio access technology, for example, UTRA or GSM.
Radio access
technology
combination
Combination of different radio access technologies.
Available PLMN A PLMN in which the UE has found at least one cell and the
UE has read its PLMN identity.
Acceptable cell A cell on which the UE may camp to obtain limited services,
for example, originating emergency calls
Suitable cell A cell on which the UE may camp to obtain normal services
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
II. Abbreviations
Abbreviation Full Spelling
3GPP 3rd Generation Partnership Project
AS Access Stratum
BCH Broadcast Channel
CN Core Network
DRX Discontinuous Reception
EF Elementary File
EPLMN Equivalent PLMN
FDD Frequency Division Duplex
GPRS General Packet Radio Service
GSM Global System for Mobile Communications
HCS Hierarchical Cell Structure
HPLMN Home PLMN
IMSI International Mobile Subscriber Identity
LAC Location Area Code
LAI Location Area Identity
LR Location Registration
MCC Mobile Country Code
MIB Master Information Block
MNC Mobile Network Code
MS Mobile Station
NAS Non-Access Stratum
PCH Paging Channel
PI Paging Indicator
PLMN Public Land Mobile Network
RAI Routing Area Identity
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
Abbreviation Full Spelling
RAT Radio Access Technology
RF Radio Frequency
RRC Radio Resource Control
RSCP Received Signal Code Power
SB Scheduling Block
S-CCPCH Secondary Common Control Physical Channel
SFN System Frame Number
SIB System Information Block
SIM Subscriber Identity Module
TDD Time Division Duplex
TMSI Temporary Mobile Subscriber Identity
UE User Equipment
UMTS Universal Mobile Telecommunications System
URA UTRAN Registration Area
USIM UMTS Subscriber Identity Module
UTRA UMTS Terrestrial Radio Access
UTRAN UMTS Terrestrial Radio Access Network
VPLMN Visited PLMN
WCDMA Wideband CDMA
2.2 Availability
2.2.1 Network Elements Involved
Table 2-1 describes the NEs involved with UE behaviors in idle mode.
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
Table 2-1 NEs required for UE behaviors in idle mode
UE NodeB RNC MSC Server MGW SGSN GGSN HLR
√ √ √ - - - - -
Note:
–: not required
√: required
Note:
This chapter describes only the availability of the NodeB and the RNC.
2.2.2 Software Releases
Table 2-2 describes the versions of RAN products that support UE’s behaviors in idle
mode.
Table 2-2 RAN products and related versions
Product Version
RNC BSC6800 V100R002 and later releases
NodeB
DBS3800 V100R005 and later releases
BTS3812A V100R005 and later releases
BTS3812E V100R005 and later releases
2.2.3 Miscellaneous
None
2.3 Impact
2.3.1 Impact on System Performance
This feature is affected by the capability of the UE and the network status.
The capability of the UE affects the quality of receiving signals.
The load of the network affects UE’s accessing to a cell. When the load is heavy,
the UE may fail to access to the cell.
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
2.3.2 Impact on Other Features
None.
2.4 Restrictions
None
2.5 Technical Description
2.5.1 UE Behaviors in Idle Mode Configuration Model
The configuration model for UE Behaviors in Idle Mode is as show in.
HCS cell reselection threshold
HCS inter-rat reselection threshold
Max number of cell reselection
HCS search inter-rat limit threshold
Frequency Band Indication
CNDOMAIN.Class
DRX cycle length coefficient
Hysteresis 1 for connect mode
Hysteresis 2 for connect mode
Cell Sel-reselection quality measure
Min quality level
Intra-freq cell reselection threshold for idle state
Inter-freq cell reselection threshold for idle state
Inter-RAT cell reselection threshold
CellClass
CELLSELRESEL .Class
CELLHCS .Class
CELLSIBSWITCH .Class
RNC
RadioClass
GlobalParaClass
Figure 2-2 UE Behaviors in Idle Mode configuration model
2.5.2 Overview
Figure 2-3 shows the relationship between UE behaviors in idle mode.
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
PLMN selection
and reselection
Location
registration
PLMNsavailable
PLMNselected
Locationregistration
changes
NAS defined service areas
Automatic/Manual selection
CM requests
NAS definedservice areas
Radiomeasurement
Cell selectionand reselection
User selection of PLMN
Indication to user
Locationregistrationresponse
Figure 2-3 UE behaviors in idle mode
After the switch-on, the UE performs the following steps:
1) Select a PLMN.
2) Select cells from this PLMN.
3) Select a best cell according to the system information.
4) Camp on this cell.
5) Initiate a location registration.
The signal strengths of both the serving cell and neighboring cells vary when the UE
moves. Therefore the UE needs to select a most suitable cell to camp on. This
procedure is called cell reselection.
2.5.3 PLMN Selection
UE shall maintain a list of allowed PLMN types. In the PLMN list, the UE arranges
available PLMNs by priorities. When selecting a PLMN, it searches the PLMNs from
the high priority to the low.
The UE selects a PLMN from HPLMNs or VPLMNs.
There are two modes for PLMN selection
Automatic selection
The UE automatically selects a PLMN according to the priority order.
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
Manual selection
The UE shows all available PLMNs to the subscriber. The subscriber then
selects a PLMN.
2.5.4 PLMN Selection in HPLMNs
I. Scenario
At any time, the subscriber may require the UE to reselect an available PLMN and
register in it. For UEs in different modes, there are two selection modes:
Automatic PLMN Selection
Manual PLMN Selection
II. Automatic PLMN Selection Mode
The UE selects an available and suitable PLMN from the whole band according to the
order as described as Table 2-1.
Table 2-1 Automatic PLMN selection mode
Order PLMN type Remark
1 HPLMNs Home PLMNs
2
PLMNs contained in the "User Controlled
PLMN Selector with Access Technology"
data field in the SIM excluding the previously
selected PLMN
The PLMNs are arranged
in priority order
3
PLMNs contained in the "Operator
Controlled PLMN Selector with Access
Technology" data field in the SIM excluding
the previously selected PLMN
The PLMNs are arranged
in priority order
4
Other PLMN/access technology
combinations with the high quality of
received signals excluding the previously
selected PLMN
The PLMNs are arranged
in random order
5
Other PLMN/access technology
combinations excluding the previously
selected PLMN
The PLMNs are arranged
in descending order of
signal quality.
6 Previously selected PLMN
The PLMN selected by the
UE before automatic
PLMN selection
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
Note:
If the UE selects a PLMN that has been selected before and the UE does not attempt
to register in any other PLMN, the UE need not register in the PLMN again.
III. Manual PLMN Selection Mode
The order of manual selection is the same as that of automatic selection.
IV. Signaling Procedure for the Automatic PLMN Selection
Figure 2-2 shows the procedure for the automatic PLMN selection.
UE-NAS UE-AS
Use last storedcell list, if any
PLMNReselection
1.RRC PLMN LIST IND(all PLMN identity(GSM-MAP) or SID/MIN_P_REV)
2.RRC PLMN Search REQ(PLMN identity(GSM-MAP) or SID/MIN_P_REV)
3.RRC PLMN Search CNF(PLMN identity (GSM-MAP) or SID)
Figure 2-2 Signaling procedure for the automatic PLMN selection
The signaling procedure of the automatic PLMN selection is described as follows:
1) After the timer of the NAS is started, the AS sends the NAS a list which includes
all available PLMNs and their identities.
6) After the PLMN with the highest priority is found, the NAS sends the AS an RRC
PLMN Search REQ message, asking the AS to select a suitable cell that
belongs to the PLMN with highest priority.
7) After finding such a cell, the AS selects the cell and sends the NAS an RRC
PLMN Search CNF message, indicating that the PLMN is found.
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
V. Signaling Procedure for the Manual PLMN Selection
Figure 2-1 shows the signaling procedure for the manual PLMN selection.
UE-NAS UE-AS
Use last stored
cell list, if any
PLMN
Selection
2. RRC PLMN LIST CNF(all PLMN identity(GSM-MAP) or SID/MIN_P_REV)
3. RRC PLMN Search REQ
(PLMN identity(GSM-MAP) or SID/MIN_P_REV)
4. RRC PLMN Search CNF(PLMN identity (GSM-MAP) or SID)
1. RRC PLMN Search REQ(ALL)
Figure 2-1 Signaling procedure for the manual PLMN selection
See the description of the signaling procedure as follows:
1) The NAS sends the AS an RRC PLMN Search REQ message, asking the AS to
report the available PLMNs.
8) The AS sends the NAS a list which includes all available PLMNs and their
identities.
9) After the PLMN with the highest priority is found, the NAS asks the AS to select a
suitable cell that belongs to the PLMN with highest priority.
10) After finding such a cell, the AS selects this cell and sends the NAS an RRC
PLMN Search CNF message, indicating that the PLMN is found.
2.5.5 PLMN Selection in VPLMNs
If a UE is in a VPLMN, it scans the “user controlled PLMN selector” field or the
“operator controlled PLMN selector” field in the PLMN list to find the HPLMN or the
PLMN with higher priority according to the requirement of the automatic PLMN
selection mode. In this way, the UE periodically attempts to obtain services.
If the UE stores the “Equivalent PLMNs” list and there is a PLMN which has
higher priority than any other PLMN in the country, the UE selects only this
PLMN. For this purpose, a value of T minutes may be stored in the SIM. T is
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
either in the range from 6 minutes to 8 hours in 6-minute steps or it indicates that
no periodic attempts shall be made. If no value is stored in the SIM, a default
value of 60 minutes is used.
The UE must obey the following rules when attempting to access the HPLMN or the
PLMN with higher priority:
The periodic attempts shall only be performed in automatic mode when the UE is
roaming.
After the UE is switched on, a period of at least 2 minutes and at most T minutes
shall elapse before the first attempt is made.
The UE shall make an attempt if the UE is on the VPLMN at time T after the last
attempt.
Periodic attempts shall only be performed by the UE when the UE is in idle
mode.
If the HPLMN or higher priority PLMN is not found, the UE shall remain on the
VPLMN.
The attempts by the UE in a PLMN with higher priority to access another PLMN
in the same country must be limited.
Only the priority levels of Equivalent PLMNs of the same country as the current
serving VPLMN can be compared with the priority level of a selected PLMN.
2.5.6 Cell Selection
I. Overview
When the PLMN is selected and the UE is in idle mode, the UE starts to select a cell
to camp on and to obtain services.
II. Algorithm
There are four states involved in cell selection:
Camped normally
Any cell selection
Camped on any cell
Connected mode
The cell selection is of two types:
Initial cell selection
If no cell information is stored for the PLMN, the UE starts this procedure.
Stored information cell selection
If cell information is stored for the PLMN, the UE starts this procedure.
As shown in Figure 2-1, in any state, the selection of a new PLMN leads the whole
procedure back to position 1.
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
Initialcell Selection
USIM inserted
go here whenever anew PLMN is
selected
1no cell informationstored for the PLMN
cell informationstored for the PLMN
Storedinformation
cell selectionno suitable cell found
no suitablecell found
Cell selectionwhen leaving
connected mode
2
suitablecell found Camped
normally
suitable cellfound
no suitablecell found
leaveidle mode
return toidle mode
CellreselectionevaluationProcess
suitablecell found
trigger
no suitablecell found
1Cell Selectionwhen leaving
connectedmode
no acceptable cell found
acceptablecell found
acceptablecell found
2
leave idle modereturn idle mode
Connectedmode(Emergency
calls only)
Cellreselectionevaluation
Process
acceptablecell found
no acceptablecell found
NAS indicates thatregistration on selectedPLMN is rejected(except with cause #14
or #15 [5][16])
suitable cellfound
A
Any cellselection
B
Camped onany cell
C
Connectedmode
D1
D2
suitablecell found
trigger
go herewhen noUSIM inthe UE
Figure 2-1 Procedure for cell selection
The two procedures are described as follows.
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
Initial cell selection
If no cell information is stored for the PLMN, the UE starts the initial cell selection. For
this procedure, the UE need not know in advance which Radio Frequency (RF)
channels are UTRA bearers. The UE scans all RF channels in the UTRA band
according to its capabilities to find a suitable cell of the selected PLMN. On each
carrier, the UE need only search for the strongest cell. Once a suitable cell is found,
this cell shall be selected.
Table 2-1 shows the transition of the UE states after the initial cell selection is started.
Table 2-1 UE state transition
No. If Then
1 The UE finds a suitable cell
The UE selects this cell and enters in the
"Camped normally" state, as shown in state A
in Figure 2-1
After leaving this state, the UE enters the
corresponding state according to No. 2 or 4 in
this table.
2The UE does not find a
suitable cell
The UE enters the “Any Cell Selection” state,
as shown in state B in Figure 2-1.
After leaving this state, the UE enters the
corresponding state according to No. 3 in this
table.
3The UE finds an acceptable
cell
The UE enters the “Camped on any cell”
state, as shown in state C in Figure 2-1.
After leaving this state, the UE enters the
corresponding state according to No. 2 or 5 in
this table.
4
The UE in the state of
“Camped normally” leaves
idle mode
The UE enters the connected mode, as
shown in state D1 in Figure 2-1.
5
The UE in the state of
“Camped on any cell”
leaves idle mode
The UE enters the connected mode
(emergency cells only), as shown in D2 in
Figure 2-1.
After leaving this state, the UE enters the
corresponding state according to No. 2 or 3 in
this table.
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
Stored information cell selection
For this procedure, the UE need know the central frequency information and other
optional cell parameters that are obtained from the measurement control information
received before, such as scrambling codes.
After this procedure is started, the UE selects a suitable cell if it finds one. Otherwise,
the “Initial cell selection” procedure is triggered.
III. Cell Selection Criteria
The cell selection criterion S is fulfilled when:
For FDD cells, Srxlev > 0 and Squal >0
For TDD cells, Srxlev > 0
Where,
Squal = Qqualmeas – Qqualmin
Srxlev = Qrxlevmeas - Qrxlevmin - Pcompensation
Parameter Description
Squal
Cell selection quality value (dB).
Applicable only for FDD cells.
Srxlev Cell selection RX level value (dB).
Qqualmeas
Measured cell quality value.
The quality of the received signal expressed in
average CPICH Ec/N0 (dB) for FDD cells.
Applicable only for FDD cells.
Qrxlevmeas
Measured cell RX level value.
It is the CPICH RSCP of received signal for FDD cells
(dBm), and the P-CCPCH RSCP of received signal
for TDD cells (dBm).
Qqualmin
Minimum required quality level in the cell (dB).
Applicable only for FDD cells. Corresponding MML
parameter is Min quality level
Qrxlevmin
Minimum required RX level in the cell (dBm).
Corresponding MML parameter is Min RX level
Pcompensation Max (UE_TXPWR_MAX_RACH – P_MAX, 0) (dB).
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
Parameter Description
UE_TXPWR_MAX_RACH
Maximum TX power level an UE may use when
accessing the cell on RACH (read in system
information) (dBm). Corresponding MML parameter is
Max allowed UE UL TX power
P_MAX Maximum RF output power of the UE (dBm).
Parameter name Min quality level
Parameter ID QQUALMIN
GUI range -24–0
Physical range& unit -24–0, dB
Default value -18
Optional / Mandatory Optional
MML command MOD CELLSELRESEL
Description:
The minimum required quality level corresponding to CPICH Ec/No. The UE can
camp on the cell only when the measured CPICH Ec/No is greater than the value
of this parameter.
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
Parameter name Min RX level
Parameter ID QRXLEVMIN
GUI range -58–-13
Physical range& unit -115–-25; step: 2 (-58:-115; -57:-113; ..., -
13:25 ) (dBm)
Default value -58
Optional / Mandatory Optional
MML command MOD CELLSELRESEL
Description:
The minimum required RX level corresponding to CPICH RSCP. The UE can
camp on the cell only when the measured CPICH RSCP is greater than the value
of this parameter.
Parameter name Max allowed UE UL TX power
Parameter ID MAXALLOWEDULTXPOWER
GUI range -58–-13
Physical range& unit dBm
Default value 24
Optional / Mandatory Optional
MML command MOD CELLSELRESEL
Description:
The maximum allowed uplink transmit power of a UE in the cell, which is related to
the network planning. Content: Allowed maximum power transmitted on RACH in
the cell.
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
IV. Signaling Procedures
UE-NAS UE-AS
Cell selection and reselection
RRC Cell Selection Control REQ(e.g. Forbidden registratoin area(s),desired
NAS defined service area(s))
Figure 2-2 Signaling procedure for the cell selection controlled by the NAS
(performed by the AS)
The NAS can affect the cell selection and reselection by sending control information
to the AS. The information is useful when the AS performs cell selection or
reselection.
Cell Selection and reselectionwithin the area selected by NAS
2 .RRC Area List RSP(selected area)(e.g. PLMNID,registration area,NAS defined service area)
Registration /servicearea selection
1.RRC Area List IND(all areas)(e.g. PLMNID,registration area,NAS defined service area)
UE-NAS UE-AS
Figure 2-3 Signaling procedure for cell selection controlled by the NAS (performed by
the NAS)
See the description of the signaling procedure as follows:
1) The AS sends the NAS the cell selection information that includes the PLMN
identity and all available registration areas.
2) The NAS sends the AS these registration areas.
3) The AS selects or reselects a cell in the selected registration area.
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
2.5.7 Cell Reselection
I. Overview
After selecting a cell and camping on it, the UE periodically searches for a better cell
according to the cell reselection criteria. The better cell is the most suitable one for
the UE to camp on and obtain services. The QoS of this cell is not necessarily more
satisfying. If finding such a cell, the UE selects this cell to camp on.
Cell reselection criteria can be adjusted by modifying cell reselection parameters
according to network operation policies. The Hierarchical Cell Structure (HCS), if
used, may affect the measurement start criteria for cell reselection.
II. Algorithm
In idle mode, the cell reselection procedure is as shown in Figure 2-1. The transition
of UE states is the same as that in cell selection. See section 2.5.6 “Cell Selection."
III. Measurement Start Criteria
4) HCS Disabled
If the system messages broadcast by the serving cell indicates that the HCS is
disabled, the intra-frequency, inter-frequency, and inter-RAT measurement criteria are
as shown in Figure 2-1.
CPICH Ec/N0Threshold of
Qqualmin
Sintersearch +Qqualmin
Sintrasearch +Qqualmin
Better quality
SsearchRATm +Qqualmin
Intra-frequency
measurement
Inter-frequency
measurement
Inter-RATmeasurement
Measuringinter-RAT
neighboring cells
Measuring inter-frequencyneighboring cells
Measuring intra-frequency neighboring cells
Measurementnot started
Figure 2-1 Measurement start criteria for cell reselection with HCS disabled
Intra-frequency measurement
- If Squal > Sintrasearch, the UE does not need to start the intra-frequency
measurement.
- If Squal ≤ Sintrasearch, the UE starts the intra-frequency measurement.
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RAN Feature Description Chapter 2 UE Behaviors in Idle Mode
- If system messages do not contain Sintrasearch, the intra-frequency
measurement is always started.
Inter-frequency measurement
- If Squal > Sintersearch, the UE does not need to start the inter-frequency
measurement.
- If Squal ≤ Sintersearch, the UE starts the inter-frequency measurement.
- If system messages do not contain Sintrasearch, the inter-frequency
measurement is always started.
Inter-RAT measurement
- If Squal > SsearchRATm, the UE does not need to start the inter-RAT
measurement.
- If Squal ≤ SsearchRATm, the UE starts the inter-RAT measurement.
- If system messages do not contain Sintrasearch, the inter-RAT measurement is
always started.
Table 2-1 Parameters of the measurement start criteria
Name Description
Qqualmin
Minimum QoS level required by Frequency Division Duplex (FDD)
cells only.
Squal Cell quality value (dB) required by FDD cells.
Sintrasearch
Measurement threshold for UE to trigger intra-frequency cell
reselection, compared with Squal.
Sintersearch
Measurement threshold for UE to trigger inter-frequency cell
reselection, compared with Squal.
Srxlev Receive level (dB) required by cell selection.
SsearchRATm
Measurement threshold for UE to trigger inter-RAT cell reselection,
compared with Squal.
The following table lists the MML parameters that correspond to the measurement
parameters.
Table 2-2 MML parameters that correspond to the measurement parameters
Name MML parameter
Sintrasearch Intra-freq cell reselection threshold for idle state
Sintersearch Inter-freq cell reselection threshold for idle state
SsearchRATm Inter-RAT cell reselection threshold
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Parameters:
Parameter name Intra-freq cell reselection threshold for idle state
Parameter ID IDLESINTRASEARCH
GUI range -16–10
Physical range& unit -32–20; step: 2(dB)
Default value 2
Optional / Mandatory Optional
MML command MOD CELLSELRESEL
Description:
A threshold for intra-frequency cell reselection in idle mode. When the quality
(CPICH Ec/No measured by UE) of the serving cell is lower than this threshold
plus the [Qqualmin] of the cell, the intra-frequency cell reselection procedure will
be started.
Parameter name Inter-freq cell reselection threshold for idle state
Parameter ID IDLESINTERSEARCH
GUI range -16–10
Physical range& unit -32 to 20; step: 2(dB)
Default value 2
Optional / Mandatory Optional
MML command MOD CELLSELRESEL
Description:
A threshold for inter-frequency cell reselection in idle mode. When the quality
(CPICH Ec/No measured by UE) of the serving cell is lower than this threshold
plus the [Qqualmin] of the cell, the inter-frequency cell reselection procedure will
be started.
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Parameter name Inter-RAT cell reselection threshold
Parameter ID SSEARCHRAT
GUI range -16–10
Physical range& unit -32–20; step: 2(dB)
Default value 2
Optional / Mandatory Optional
MML command MOD CELLSELRESEL
Description:
A threshold for inter-RAT cell reselection. When the quality (CPICH Ec/No
measured by UE) of the serving cell is lower than this threshold plus the
[Qqualmin] of the cell, the inter-RAT cell reselection procedure will be started.
5) HCS Enabled
When the HCS is enabled, the measurement criteria for the UE in movement are
listed in Table 2-1, Table 2-2, Table 2-3, and Table 2-4.
Intra-frequency and inter-frequency measurement criteria for UE in slow
movement
Table 2-1 Intra- and inter-frequency measurement criteria for UE in slow movement
Condition Result
Srxlev ≤ SsearchHCS, or Squal ≤
Sintersearch
All intra-frequency and inter-frequency cells are
measured.
Squal ≤ Sintrasearch
Intra-frequency and inter-frequency cells are
measured with their HCS level no lower than that
of the current cell.
Squal > Sintrasearch
Intra- and inter-frequency cells are measured with
their HCS level higher than that of the current cell.
Sintrasearch not delivered
All intra-frequency cells are measured.
Inter-frequency cells are measured with their HCS
level higher than that of the current cell.
SsearchHCS or Sintersearch not
deliveredAll intra- and inter-frequency cells are measured.
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The HCS of intra-frequency neighboring cells of a cell is usually consistent with that of
the cell. If the Squal of the current cell is good enough, that is, Squal > Sintrasearch, the UE
only needs to compare the Squal in these cells with different HCS.
Inter-RAT measurement criteria for UE in slow movement
Table 2-2 Inter-RAT measurement criteria for UE in slow movement
Condition Result
Srxlev ≤ SHCS,RATm, or Squal ≤
SSearchRATm
Inter-RAT cells are measured.
Squal ≤ Slimit,SearchRATm
Inter-RAT cells are measured with their HCS level no
lower than that of the current cell.
Squal > Slimit,SearchRATm The UE does not need to measure inter-RAT cells.
SHCS,RATm not delivered Inter-RAT cells are measured.
Intra-frequency and inter-frequency measurement criteria for UE in fast
movement
Table 2-3 Intra- and inter-frequency measurement criteria for UE in fast movement
Condition Result
Srxlev ≤ SsearchHCS, or Squal ≤
Sintersearch
All intra- and inter-frequency cells are measured.
Others such as Srxlev and Squal
are good.
All intra- and inter-frequency cells are measured
with their HCS level no higher than that of the
current cell.
SsearchHCS or Sintersearch not
deliveredAll intra- and inter-frequency cells are measured.
Inter-RAT measurement criteria for UE in fast movement
Table 2-4 Inter-RAT measurement criteria for UE in fast movement
Condition Result
Srxlev ≤ SHCS,RATm, or Squal ≤
SSearchRATm
Inter-RAT cells are measured.
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Condition Result
Others such as Srxlev and Squal
are good.
All inter-RAT cells are measured with their HCS
level no higher than that of the current cell.
SHCS,RATm or SSearchRATm not
deliveredInter-RAT cells are measured.
Table 2-5 describes all the parameters of the measurement start criteria.
Table 2-5 Parameters of the measurement start criteria
Name Description
Qqualmin
Minimum QoS level required by Frequency Division Duplex (FDD)
cells only.
Squal Cell quality value (dB) required by FDD cells.
Sintrasearch
Measurement threshold for UE to trigger intra-frequency cell
reselection, compared with Squal.
Sintersearch
Measurement threshold for UE to trigger inter-frequency cell
reselection, compared with Squal.
SsearchHCS
Measurement threshold for UE to trigger inter-frequency cell
reselection, compared with Srxlevs.
Srxlev Receive level (dB) required by cell selection.
SsearchRATm
Measurement threshold for UE to trigger inter-RAT cell reselection,
compared with Squal.
SHCS,RATm
Measurement threshold for UE to trigger inter-RAT cell reselection,
compared with Srxlevs.
Slimit,SearchRATm
Measurement threshold for UE in slow movement to trigger inter-
RAT cell reselection, compared with Squal.
The following table lists the MML parameters that correspond to the measurement
parameters.
Table 2-6 MML parameters that correspond to the measurement parameters
Name MML parameter
SsearchHCS HCS cell reselection threshold
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Name MML parameter
SHCS,RATm HCS inter-rat reselection threshold
Slimit,SearchRATm HCS search inter-rat limit threshold
Parameters:
Parameter name HCS cell reselection threshold
Parameter ID SSEARCHHCS
GUI range -53–45
Physical range& unit -105–91; step: 2 (-53:-105; -52:-103; ..., 45:91) (dB)
Default value 0
Optional / Mandatory Optional
MML command MOD CELLHCS
Description:
Threshold of HCS cell reselection in the same system.
Parameter name HCS inter-rat reselection threshold
Parameter ID SHCSRAT
GUI range -53–45
Physical range& unit -105–91; step: 2 (-53:-105; -52:-103; ..., 45:91) (dB)
Default value 0
Optional / Mandatory Optional
MML command MOD CELLHCS
Description:
Threshold of HCS cell reselection between different systems.
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Parameter name HCS search inter-rat limit threshold
Parameter ID SLIMITSEARCHRAT
0GUI range -16–10
Physical range& unit -32–20; step: 2 (dB)
Default value 0
Optional / Mandatory Optional
MML command MOD CELLHCS
Description:
Limit threshold of HCS cell reselection between different systems. The UE will not
start inter-RAT measurement if it detects that the quality of the serving cell is
higher than this threshold.
IV. Cell Reselection Criteria
The following cell reselection criteria are used for intra-frequency cells, inter-
frequency cells and inter-RAT cells.
The quality level threshold criterion H for the HCS is used to determine whether the
prioritized ranking based on the hierarchical cell reselection rules shall apply. The
criterion is defined by:
Hs = Qmeas,s - Qhcss
Hn = Qmeas,n - Qhcsn – TOn * Ln
If the system information indicates that the HCS is not used, the quality level
threshold criterion H does not apply.
The cell-ranking criterion R is defined by:
Rs = Qmeas,s + Qhysts
Rn = Qmeas,n - Qoffsets,n - TOn * (1 – Ln)
Where,
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TOn = TEMP_OFFSETn * W(PENALTY_TIMEn – Tn)
Ln = 0 if HCS_PRIOn = HCS_PRIOs
Ln = 1 if HCS_PRIOn <> HCS_PRIOs
W(x) = 0 for x < 0W(x) = 1 for x >= 0
TEMP_OFFSETn applies as an offset to the R criteria for the duration of
PENALTY_TIMEn after a timer Tn is started for that neighboring cell.
TEMP_OFFSETn and PENALTY_TIMEn are only applicable when the system
information indicates that the HCS is enabled.
The UE shall rank the following cells that fulfill the S criterion.
All cells that have the highest HCS_PRIO among those cells that fulfill the
criterion H 0. Note that this rule is not applicable when UE high-mobility is
detected.
All cells, not considering HCS priority levels, if no cell fulfills the criterion H 0.
This case is also applicable when the system information indicates that the HCS
is disabled, that is, when the serving cell does not belong to a HCS.
The cells are ranked according to the R criteria specified above, deriving Qmeas,n
and Qmeas,s and calculating the R values.
The offset Qoffset1s,n is used for Qoffsets,n to calculate Rn. The hysteresis Qhyst1s
is used for Qhysts to calculate Rs.
If the system information indicates that HCS is enabled, TEMP_OFFSET1n is
used for TEMP_OFFSETn to calculate TOn. Otherwise, TEMP_OFFSETn is not
applied when calculating Rn. The best ranked cell is the cell with the highest R
value.
If a TDD or GSM cell is ranked as the best cell, the UE shall reselect that TDD or
GSM cell.
If an FDD cell is ranked as the best cell and the quality measure for cell selection
and reselection is set to CPICH RSCP, the UE shall reselect that FDD cell.
If an FDD cell is ranked as the best cell and the quality measure for cell selection
and reselection is set to CPICH Ec/N0, the UE shall perform a second ranking of
the FDD cells according to the R criteria specified above.
In this case, however, the UE uses the measurement quantity CPICH Ec/N0 for
deriving the Qmeas,n and Qmeas,s and then calculating the R values of the
FDD cells. The offset Qoffset2s,n is used for Qoffsets,n to calculate Rn, the
hysteresis Qhyst2s is used for Qhysts to calculate Rs.
If the system information indicates that the HCS is enabled, TEMP_OFFSET2n
is used to calculate TOn. Otherwise, TEMP_OFFSETn is not applied when
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calculating Rn. Following this second ranking, the UE shall reselect the best
ranked FDD cell.
In all the previous cases, the UE can reselect a new cell only when the following
conditions are met:
The new cell is better ranked than the serving cell during a time interval Treselection.
More than one second has elapsed since the UE camped on the current serving
cell.
Figure 2-2 shows the cell reselection procedure in which the measurement start and
criteria relations are described. The actual procedure varies with UE implementation.
filter cells withSx (Squal)
Cell ReselctionTriggered
calculateSx (Squal)
chooseintra-freq./inter-freq./inter-RATmeasurements according to
Sx (Squal) andUE Velocity
UE Velocityand HCS usage
rankingall measured cells
according toR criteria
filtermeasured cells with
H criteria
rankingmeasured cells with
Highest HCS Priorityaccording to
R criteria
rankingall measured cells
according toR criteria
non-HCSenvironment
orfor Fast UE (HCS)
fornon-Fast UE
(HCS)
if no cellfullfill
H criteria
for cellsfullfill
H criteria
keep rankingduring Treselection
withScaling Rules
UE reselectnew cell
Figure 2-2 Cell reselection procedure
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Name Description
R criteria R decision criteria
H criteria H decision criteria
Treselection Time of cell reselection decision
2.5.8 Location Registration
I. Overview
The location registration is used for the PLMN to trace the current status of the UE
and to ensure that the UE is connected with the network when the UE does not
perform any operation for a long period. The location registration includes location
update (for non-GPRS) and route update (for GPRS).
According to whether to perform the location registration or not, the UE enters
different states as follows:
If the SIM exists and the location registration is unneeded, the UE enters the
Updated state.
If the SIM exists and the location registration is needed, the UE sends a location
registration request.
If the SIM does not exist, the UE enters the No IMSI state.
The purposes of location update and route update are to enable the UE to perform
GPRS or non-GPRS operations. Table 2-1 shows the conditions of UE state
transition.
Table 2-1 UE state transition conditions
UE State Condition of entering this state
non-GPRS
Updated An LR request is accepted.
Roaming
not
allowed
The UE receives an LR reject message with either of the
following causes:
a) PLMN not allowed
b) Location area not allowed
c) Roaming not allowed in this location area
d) No suitable cells in location area
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UE State Condition of entering this state
Not
Updated
Any LR failure not specified for the state ‘Roaming not
allowed’ or ‘Idle, No IMSI’ occurs, for which the UE is not
certain whether or not the network has received and
accepted the LR attempt.
GPRS
Updated A Location Registration request is accepted.
Idle, No
IMSIThere is no SIM.
Roaming
not
allowed
The UE receives an LR reject message with either of the
following causes:
a) PLMN not allowed
b) Location area not allowed
c) Roaming not allowed in this location area
d) No suitable cells in location area
e) Illegal ME
f) Illegal UE
g) GPRS services and non-GPRS services not allowed
h) GPRS services not allowed in this PLMN
Not
Updated
Any LR failure not specified for state ‘Roaming not
allowed’ or ‘Idle, No IMSI’ occurs, in which the UE is not
certain whether or not the network has received and
accepted the LR attempt.
Roaming
not
allowed
The UE receives an LR reject message with either of the
following causes:
a) PLMN not allowed
b) Location area not allowed
c) Roaming not allowed in this location area
d) No suitable cells in location area
II. Algorithm
Periodic Location Registration
Periodic location registration may be used to periodically notify the network of the
availability of the UE. It is controlled by a Periodic Location Update timer (T3212, for
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non-GPRS operation) or a Periodic Routing Area Update timer (T3312, for GPRS
operation):
The value range of T3212(corresponding MML parameters: Periodical location
update timer) is 0–255 (unit: 1/10 hr; granularity: 1/10 hr)
Suppose the UE is switched on or the system information indicates that periodic
location registration shall be applied, and the timer is not running. Then the timer
shall be loaded with a random value between 0 and the broadcast or signaled
time-out value and started. For example, t1 is the new T3212 timeout value.
Then the new timer shall be started randomly at a value between 0 and t1.
When the timer reaches its expiry value, it shall be initiated with respect to the
relevant time-out value. The UE shall initiate the periodic location registration
corresponding to the expired timer, and the started.
T3212 shall be prevented from triggering periodic location update in connected
mode. When the UE returns to idle mode, T3212 shall be initiated with respect to
the broadcast time-out value, and then started. The UE shall initiate the periodic
location registration corresponding to the expired timer.
T3312 shall be prevented from triggering periodic routing area update in Ready
state. At transition from Ready to Standby state, T3312 shall be initiated with
respect to its time-out value, and then started. The UE shall initiate the periodic
location registration corresponding to the expired timer.
If the UE performs a successful combined routing area update, T3212 shall be
prevented from triggering periodic location update. This prevention shall be
performed until the UE starts location update, for example, because a network
operation mode changes or the UE uses non-GPRS services only.
When the serving cell changes or the broadcast/signaled time-out value
changes, the timeout value shall change accordingly. Here, the related timer
shall be reloaded.
Suppose t1 is the new T3212 timeout value and t is the current timer value. Then
the timer shall be restarted with the value of t mod t1.
The value of T3212 is sent by the network to the UE in SIB 1.
The value of T3312 is sent by the network to the UE in the messages ATTACH
ACCEPT and ROUTING AREA UPDATE ACCEPT. The value of T3312 shall be
unique within an RA.
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Parameter name Periodical location update timer
Parameter ID T3212
GUI range 0–255
Physical range& unit 6 min
Default value 10
Optional / Mandatory Optional
MML command MOD CNDOMAIN/ ADD CNDOMAIN
Description:
Periodical location update is implemented by MS through the location update
procedure. 0: The periodical update procedure is not used. This parameter is valid
only when [CN domain ID] is set as CS_DOMAIN.
IMSI Attach and Detach Operation
The system information will contain an indicator indicating whether IMSI attach/detach
operation is mandatory in the cell. The UE shall operate in accordance with the
received value of the indicator. This indicator, however, shall not be considered in
GRPS attach/detach.
When IMSI detach operation applies, the UE shall send the IMSI detach message to
the network when the UE is switched off or the SIM is removed while being in the
UPDATED state. This IMSI detach message will not be acknowledged by the network.
If the UE is still in the original registration area when returning to the active state, the
UE shall perform an LR request indicating IMSI attach. Otherwise, an LR request
shall indicate normal location update.
Algorithm When There Are No Suitable Cells in Location Area
If the UE receives the LR response "No Suitable Cells In Location Area" during
location registration, then the UE shall search for another location area in the same
PLMN where it received the LR response. If the UE finds another location area, it
shall attempt registration. Otherwise, an automatic or manual selection procedure
shall be followed.
2.5.9 Paging
I. Principle
Paging is used for the network to send paging messages to UEs in idle mode,
CELL_PCH state, or URA_PCH state. The UE in idle mode may use Discontinuous
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Reception (DRX) in order to reduce power consumption. The UE needs to monitor
only one Page Indicator (PI) in one Paging Occasion per DRX cycle.
For FDD, The DRX cycle length shall be 2k frames. Where, k is an integer and is
decided by the following three parameters:
CN domain specific DRX cycle length for CS
CN domain specific DRX cycle length for PS
UTRAN DRX cycle length coefficient
II. Algorithm
The following introduces the three parameters:
CN domain specific DRX cycle lengths
The UE may be attached to different CN domains with different CN domain
specific DRX cycle lengths. The UE shall store these lengths for all CN domains
the UE is attached to and use the shortest one.
The CN specific DRX cycle length coefficient of the CS domain shall be
updated locally in the UE through system information. The coefficient of the PS
domain shall be updated after the negotiation between the UE and PS domain
through NAS procedure. If no specific value "k" is negotiated in NAS procedure,
the UE and PS domain shall use the DRX cycle length given for PS domain in
system information.
For a UE in idle mode, the DRX cycle length equals to the following or the
shortest value of the following:
- Any of the stored DRX cycle length for the CN domains the UE is attached to
with no signaling connection established
For a UE in CELL_PCH state or URA_PCH state, it equals to the shortest value
of the following:
- UTRAN DRX cycle length
- Any of the stored DRX cycle length for the CN domains the UE is attached to
with no signaling connection established
UTRAN DRX cycle length
This parameter value is sent to the UE through the RRC CONNECTION SETUP
message without distinguishing specific CN domain types.
The UTRAN side determines the Paging Occasion based on all the following
information (this occasion is actually the frame number in the paging channel
cycle length of 4096 frames):
- IMSI
- The number of available S-CCPCHs that carry a PCH
- The Cell System Frame Number (SFN)
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- The DRX cycle length
Parameter name DRX cycle length coefficient
Parameter ID DRXCYCLELENCOEF
GUI range 6–9
Physical range& unit -
Default value 6
Optional / Mandatory Optional
MML command MOD CNDOMAIN/ ADD CNDOMAIN
Description:
CN domain specific DRX cycle length coefficient broadcast on SIB1 and used by
UEs in Idle Mode.
2.5.10 System Information Reception
I. Structure of System Information
System information is used for the network to broadcast network information to UEs
camping on a cell so as to control the behavior of UEs.
System information is organized as a tree, including:
MIB
Master Information Block (MIB) gives reference and scheduling information for a
number of SIBs in a cell or one or two SBs in a cell. The MIB contains only the
PLMN types supported and the corresponding PLMN identities.
SB
Scheduling Block (SB) gives reference and scheduling information to other SIBs.
The scheduling information of a SIB may be included in only one of MIB and SB.
SIB
System Information Block (SIB) contains actual system information. It consists of
system information elements (IEs) with the same purpose.
When selecting a new cell, the UE reads the MIB. The UE may locate the MIB by
predefined scheduling information. The IEs in the MIB includes MIB value tag, PLMN
type, PLMN identity, and other SIB scheduling information.
The main purposes of reading the MIB are as follows:
By reading the PLMN type, the UE can know the PLMN type of the current
network.
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By reading the PLMN identity, the UE can check it is the selected PLMN.
By comparing the value tag in the MIB with that stored for this cell and PLMN,
the UE can determine whether to read and store scheduling information.
By reading the scheduling information in each SIB, the UE can know the value
tag and actual position of each SIB.
By comparing the value tag in each SIB with that stored for this cell and PLMN,
the UE can determine whether to read and store the SIB. For those SIBs not
supported by the UE, it will skip reading and monitoring them.
The UE may use the scheduling information in MIB and SB to locate each SIB to be
acquired. If the UE receives a SIB in a position according to the scheduling
information and consider the content valid, it will read and store it.
II. Reception of System Information
The UE shall read system information broadcast on a BCH transport channel when
the UE is in idle mode or in connected mode, that is, in CELL_FACH, CELL_PCH, or
URA_PCH state. The main processing methods are as follows:
When the UE is switched off
Except the SIBs stored in the USIM and used for stored information cell-
selection, the UE shall consider other stored SIBs as invalid.
When the UE is switched on
The UE shall store SIBs with area scope (cell, PLMN or Equivalent PLMN, and
their value tag). These SIBs are used when the UE returns to these cells.
When selecting a new cell
The UE shall consider all current SIBs with area scope cell and PLMN to be
invalid, and store and use a new one. If the identity of this PLMN is not indicated
to be equivalent to the identity of the previously selected PLMN, the UE shall
consider all SIBs with area scope Equivalent PLMN to be invalid, and store and
use a new one.
When selecting a new cell in the current PLMN
The UE shall consider all current SIBs with area scope cell to be invalid, and
store and use a new one.
2.6 Capabilities
None
2.7 Implementation
2.7.1 Enabling UE Behaviors in Idle Mode
This feature does not need extra hardware or initialization. It takes effect
automatically.
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For the network planning or optimization, the data can be adjusted on the RNC LMT
as required. Default value of the related parameters is recommended to be used.
2.7.2 Reconfiguring Parameters
I. Parameter Reconfiguration on the RNC Side
Table 2-2 describes the commands used for the reconfiguration on the RNC side.
Table 2-2 Commands for the reconfiguration on the RNC side
Function Command
About the cell
selection and
reselection
information
To query the selection and
reselection informationLST CELLSELRESEL
To add the selection and
reselection informationADD CELLSELRESEL
To modify the selection and
reselection informationMOD CELLSELRESEL
About the cell HCS
parameters
To add HCS parameters ADD CELLHCS
To modify HCS parameters MOD CELLHCS
About the cell SIB
switch
To query the system
information block(SIB) switch
of a cell
LST CELLSIBSWITCH
To add the SIB switch of a cell ADD CELLSIBSWITCH
To modify the SIB switch of a
cellMOD CELLSIBSWITCH
About UE timers and
constants in idle
mode
To query UE timers and
constants in idle modeLST IDLEMODETIMER
To set UE timers and
constants in idle modeSET IDLEMODETIMER
About UE timers and
constants in
connected mode
To query UE timers and
constants in connected modeLST CONNMODETIMER
To set UE timers and
constants in connected modeSET CONNMODETIMER
To query the PCH
configuration informationLST PCH
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Function Command
About the PCH
configuration
information
To add the PCH configuration
informationADD PCH
To remove the PCH
configuration informationRMV PCH
About the PICH
configuration
information
To query the PICH
configuration informationLST PICH
To add the PICH configuration
informationADD PICH
To remove the PICH
configuration informationRMV PICH
II. Parameter Reconfiguration on the NodeB Side
None.
III. Examples
//Query the cell selection and reselection information of the cell 1.
LST CELLSELRESEL: CellId=1, LstFormat=VERTICAL;
//Modify the lowest quality criterion corresponding to CPICH Ec/N0 to –22
dB.
MOD CELLSELRESEL: CELLID=1, QQUALMIN=-22;
2.7.3 Disabling UE Behaviors in Idle Mode
UE behaviors in idle mode can be set and reconfigured, but not disabled.
2.8 Maintenance Information
2.8.1 Alarms
ALM_2005 System Information Update Failed
2.8.2 Counters
Table 2-3 describes the counters related to UE behaviors in idle mode.
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Table 2-3 Counters related to UE behavior in idle mode
Item Description
Measurement object ->
measurement family ->
measurement unit
VS.RANAP.Paging.Att Number of CN Paging
Requests
RNC->SIG->PAGE.RNC
VS.RANAP.Paging.Att.I
dleUE
Number of Times of Paging
Idle UE
RNC->SIG->PAGE.RNC
VS.RANAP.Paging.Succ
.IdleUE
Successful Number of
Times of Paging Idle UE
RNC->SIG->PAGE.RNC
VS.UTRAN.Paging1.Att Number of UTRAN-
Originated PAGING TYPE 1
Messages
RNC->SIG->PAGE.RNC
VS.UTRAN.Paging2.Att Number of PAGING TYPE 2
Messages
RNC->SIG->PAGE.RNC
VS.UTRAN.SuccPage1 Number of Successful
Responses to PAGING
TYPE 1 Messages
RNC->SIG->PAGE.RNC
VS.CN.Page.Loss.IUFC Number of Paging
Messages Discarded due to
Iu Interface Flow Control
RNC->SIG->PAGE.RNC
VS.CN.Page.Loss.PCH
Cong
Number of Paging
Messages Lost due to PCH
Congestion
RNC->SIG->PAGE.RNC
2.9 References
3GPP, TS 22.011 "Service accessibility"
3GPP, TS 23.122 "NAS Functions related to Mobile Station (MS) in idle mode"
3GPP, TS 24.008 "Mobile radio interface layer 3 specification; Core Network
Protocols - Stage 3"
3GPP, TS 25.304 "UE Procedures in Idle Mode and Procedures for Cell
Reselection in Connected Mode"
3GPP, TS 25.331 "Radio Resource Control (RRC)"
3GPP, TS 31.102 "Characteristics of the USIM Application"
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