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Alcatel-Lucent
Base Station Subsystem | B12
Network Reconfiguration Recommendations
9YZ-03803-1862-PCZZA
Issue 5b | February 2013
Legal notice
Legal notice
Alcatel, Lucent, Alcatel-Lucent and the Alcatel-Lucent logo are trademarks of Alcatel-Lucent. All other trademarks are the property of their respective
owners.
The information presented is subject to change without notice. Alcatel-Lucent assumes no responsibility for inaccuracies contained herein.
Copyright 2013 Alcatel-Lucent. All rights reserved.
Note:
Not to be used or disclosed except in accordance with applicable agreements.
Contents
About this document
Purpose ............................................................................................................................................................................................ xvxv
Reason for reissue ....................................................................................................................................................................... xvxv
New in this release ...................................................................................................................................................................... xvxv
Intended audience ...................................................................................................................................................................... xvixvi
Supported systems ..................................................................................................................................................................... xvixvi
How to use this document ....................................................................................................................................................... xvixvi
Prerequisites ................................................................................................................................................................................. xvixvi
Conventions used ....................................................................................................................................................................... xvixvi
Related information ................................................................................................................................................................. xviixvii
Document support .................................................................................................................................................................... xviixvii
Technical support ...................................................................................................................................................................... xviixvii
How to order ............................................................................................................................................................................... xviixvii
How to comment ....................................................................................................................................................................... xviixvii
1 Network Modifications
Overview ...................................................................................................................................................................................... 1-11-1
Network Modification Process
About Network Modification Process ............................................................................................................................... 1-51-5
Reverse Procedure
About Reverse Procedure ...................................................................................................................................................... 1-71-7
Procedural Guidelines
About Procedural Guidelines ............................................................................................................................................... 1-91-9
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Choose Abis Transmission Settings
About Choosing Abis Transmission Settings ............................................................................................................... 1-131-13
Check for Sufficient Resources on Abis
About Checking for Sufficient Resources on Abis .................................................................................................... 1-161-16
Display Timeslot Allocation ............................................................................................................................................... 1-161-16
Check Submultiplexing Scheme of RSL/OML ........................................................................................................... 1-161-16
Attempt to Add BTS .............................................................................................................................................................. 1-171-17
Optional Feature Limitation
About Optional Feature Limitation .................................................................................................................................. 1-211-21
Activate New B12 Features
Dynamic Power Voltage Adjustment (DPVA) ............................................................................................................. 1-241-24
Support of 1400 TRX / 7 CCP (6300 Erlangs) ............................................................................................................ 1-241-24
AUser Plane over IP ............................................................................................................................................................. 1-251-25
VAMOS ...................................................................................................................................................................................... 1-271-27
Types 28,18,19,110,180, GPRS in 15 Minutes Granularity ................................................................................... 1-291-29
RMS Type A&B&C Report in 15 Minutes Granularity ........................................................................................... 1-311-31
Ater GCH Equity per GP ..................................................................................................................................................... 1-321-32
Activate New B11 Features
About New B11 Features .................................................................................................................................................... 1-331-33
IP Transport in BSS ............................................................................................................................................................... 1-331-33
AMR Signalling Improvements ........................................................................................................................................ 1-341-34
Improved Packet Connection Configurations .............................................................................................................. 1-351-35
Paging Coordination in BSS Support .............................................................................................................................. 1-361-36
Connect Supplementary Equipment to BTS ................................................................................................................. 1-371-37
A5/3 Ciphering Algorithm Support ................................................................................................................................. 1-381-38
Inter-BSS NACC/ Inter-RAT NACC (3G - ->2G) ..................................................................................................... 1-391-39
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Support of TFO on NB-AMR ............................................................................................................................................ 1-411-41
A Signalling over IP .............................................................................................................................................................. 1-421-42
A-Flex ......................................................................................................................................................................................... 1-421-42
Gb Flex ....................................................................................................................................................................................... 1-431-43
Lb Interface .............................................................................................................................................................................. 1-431-43
Description of Lb Interface ................................................................................................................................................. 1-431-43
Prerequisites for Lb Interface ............................................................................................................................................. 1-441-44
Activate Lb Interface Feature ............................................................................................................................................ 1-451-45
Deactivate Lb Interface Feature ........................................................................................................................................ 1-471-47
IURG ........................................................................................................................................................................................... 1-471-47
Avoid Ping Pong between CS and PS Zone ................................................................................................................. 1-481-48
TRX Dynamic Power Saving ............................................................................................................................................. 1-491-49
STM1 on 9130 BSC Evolution ......................................................................................................................................... 1-491-49
3G Search Prio wrong in PMO ......................................................................................................................................... 1-511-51
AMRWB Cell Load Handling .......................................................................................................................................... 1-521-52
Interworking with LTE in the packet domain .............................................................................................................. 1-531-53
2G to LTE (TDD) Cell Re-selection ................................................................................................................................ 1-551-55
9130 BSCAvailability Improvement.Weekly Standby Reset. ............................................................................... 1-571-57
CS/PS Outage Detection ...................................................................................................................................................... 1-611-61
OMCP-OMC Supervision Link Defense ....................................................................................................................... 1-621-62
RMS Improvement: Increase of the 42 BCCH-BSIC Pairs Limit ........................................................................ 1-641-64
Antenna Hopping ................................................................................................................................................................... 1-651-65
Network Synchronization of Radio TS .......................................................................................................................... 1-661-66
Best Effort Qos Handling Without PFC Negotiation ................................................................................................ 1-671-67
QoS Implementation to Cope with QQ Congestion .................................................................................................. 1-681-68
4 CCCH Time Slots in a Cell ............................................................................................................................................. 1-711-71
Radio Measurements Statistics Improved ..................................................................................................................... 1-721-72
Contents
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User Prioritized Action Based on SIM (SIM Card Access Control) .................................................................... 1-731-73
One Logical Cell ..................................................................................................................................................................... 1-731-73
Activate New B10 Features
STM1 in 9125 TC Equipped with TC STM1-IP Subrack ....................................................................................... 1-751-75
GboIP .......................................................................................................................................................................................... 1-771-77
Mx Capacity Improvement ................................................................................................................................................. 1-781-78
Multiple CCCH ....................................................................................................................................................................... 1-801-80
Ping Time Reduction ............................................................................................................................................................. 1-801-80
Improved Delayed UL TBF release ................................................................................................................................. 1-801-80
Dual Transfer Mode ............................................................................................................................................................... 1-821-82
Extended Dynamic Allocation ........................................................................................................................................... 1-831-83
Adaptive Multiple Rate - Wideband ................................................................................................................................ 1-841-84
2G to 3G/TDSCDMACell Reselection ......................................................................................................................... 1-861-86
Fast 3G Re-selection at 2G CS Call Release ................................................................................................................ 1-881-88
Alarm Management of External Equipment ................................................................................................................. 1-891-89
Enable Multislot Classes 30-33 ......................................................................................................................................... 1-901-90
Half-Rate Activation in Bulk Mode ................................................................................................................................. 1-911-91
Activate New B9 Features
How to Activate New B9 Features ................................................................................................................................... 1-931-93
Abis Dynamic .......................................................................................................................................................................... 1-931-93
M_EGCH Statistical Multiplexing ................................................................................................................................... 1-941-94
Enhanced Transmission Resource Management ......................................................................................................... 1-941-94
Counter Improvements ......................................................................................................................................................... 1-951-95
Electro Magnetic Environment ......................................................................................................................................... 1-951-95
GPRS QoS Support ............................................................................................................................................................... 1-971-97
Enhanced Packet Cell Reselection ................................................................................................................................... 1-981-98
Extended UL TBF Mode ..................................................................................................................................................... 1-991-99
Contents
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Autonomous Packet Resource Allocation (RAE4) .................................................................................................. 1-1001-100
E-GSM: GPRS and Signalling in G1 Band Support ............................................................................................... 1-1001-100
Improved 2G 3G Cell Reselection ................................................................................................................................. 1-1011-101
Load Based 3G HO Filtering ........................................................................................................................................... 1-1021-102
2G-to-3G HO Preparation ................................................................................................................................................. 1-1021-102
EGPRS in Uplink Enhanced Support ........................................................................................................................... 1-1031-103
RMS Improvement .............................................................................................................................................................. 1-1031-103
SNMPManager in OMC ................................................................................................................................................... 1-1041-104
Unbalancing TRX Output Power ................................................................................................................................... 1-1051-105
Activate New B8 Features
LCS ........................................................................................................................................................................................... 1-1061-106
E-GPRS ................................................................................................................................................................................... 1-1081-108
2 Scenario Applicability
Overview ...................................................................................................................................................................................... 2-12-1
Add Alcatel-Lucent 9110 Micro BTS/9110-E Micro BTS and 9100 BTS .......................................................... 2-32-3
Delete Alcatel-Lucent 9110 Micro BTS/9110-E Micro BTS and 9100 BTS ...................................................... 2-42-4
Alcatel-Lucent 9110 Micro BTS/9110-E Micro BTS and 9100 BTS : Add TRE ............................................. 2-52-5
Alcatel-Lucent 9110 Micro BTS/9110-E Micro BTS and 9100 BTS: Delete TRE ......................................... 2-62-6
Alcatel-Lucent 9110 Micro BTS/9110-E Micro BTS and 9100 BTS: Add Sector ........................................... 2-72-7
Alcatel-Lucent 9110 Micro BTS/9110-E Micro BTS and 9100 BTS: Remove Sector .................................. 2-72-7
Alcatel-Lucent 9110 Micro BTS/9110-E Micro BTS and 9100 BTS: Reconfigure BTS
TREs/Sectors ...................................................................................................................................................................... 2-82-8
Alcatel-Lucent 9110 Micro BTS/9110-E Micro BTS and 9100 BTS: Create/Reconfigure
Multiband ............................................................................................................................................................................ 2-82-8
Alcatel-Lucent 9100 BTS: Upgrade with New Modules ........................................................................................... 2-92-9
Alcatel-Lucent 9100 BTS: Synchronize BTS Site Master/Slave ............................................................................ 2-92-9
Alcatel-Lucent 9100 BTS: Desynchronize BTS Site Master/Slave ..................................................................... 2-102-10
Contents
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Alcatel-Lucent 9110 Micro BTS/9110-E Micro BTS and 9100 BTS: Replace BTS .................................... 2-102-10
Abis: Move BTS/Abis .......................................................................................................................................................... 2-122-12
Add BSS .................................................................................................................................................................................... 2-132-13
9120/9130 BSS Evolution: Replace BSC ...................................................................................................................... 2-142-14
Change to IP Mode for 9130 BSC Evolution ............................................................................................................... 2-142-14
Move BSS: Different SGSN ............................................................................................................................................... 2-152-15
Introduce GPRS ...................................................................................................................................................................... 2-152-15
Delete GPRS ............................................................................................................................................................................ 2-162-16
Extend/Reduce or Modify GPRS ..................................................................................................................................... 2-172-17
Extend 9120 BSC and Ater Mux Interface ................................................................................................................... 2-182-18
Extend 9130 BSC Evolution and Ater Mux Interface ............................................................................................... 2-192-19
Reduce 9130 BSC Evolution ............................................................................................................................................. 2-202-20
Reduce 9120 BSC and Ater Mux Interface ................................................................................................................... 2-202-20
Add/Delete PCM .................................................................................................................................................................... 2-212-21
Move Ater PCM ...................................................................................................................................................................... 2-222-22
Add/Delete GPU ..................................................................................................................................................................... 2-232-23
Add/Delete GP ........................................................................................................................................................................ 2-232-23
Move 9120 BSC, Same OMC-R ...................................................................................................................................... 2-242-24
Move 9130 BSC Evolution, Same OMC-R .................................................................................................................. 2-252-25
Move 9120 BSC, Different OMC-R ............................................................................................................................... 2-272-27
Move 9130 BSC Evolution, Different OMC-R ........................................................................................................... 2-282-28
Move BSS, Different 9125 TC .......................................................................................................................................... 2-292-29
Merge TC .................................................................................................................................................................................. 2-302-30
Activate Ater Satellite ........................................................................................................................................................... 2-302-30
Deactivate Ater Satellite ...................................................................................................................................................... 2-302-30
Activate Abis Satellite .......................................................................................................................................................... 2-302-30
Deactivate Abis Satellite ...................................................................................................................................................... 2-312-31
Contents
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X.25 ............................................................................................................................................................................................. 2-312-31
IP .................................................................................................................................................................................................. 2-312-31
Modify Logical Parameters Using MLU ....................................................................................................................... 2-322-32
Attach Secondary Abis ......................................................................................................................................................... 2-322-32
Detach Secondary Abis ........................................................................................................................................................ 2-332-33
3 Additional Information
Overview ...................................................................................................................................................................................... 3-13-1
Personnel Profiles ..................................................................................................................................................................... 3-13-1
Terminology ................................................................................................................................................................................ 3-23-2
Contents
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Contents
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List of tables
1-1 Abis Link Capacity ................................................................................................................................................. 1-141-14
1-2 Timeslots Needed Per Number of TRX for Each Type of Submultiplexing ..................................... 1-151-15
1-3 Number of RSL/OML per Timeslot ................................................................................................................. 1-161-16
1-4 Error Messages for Add BTS .............................................................................................................................. 1-191-19
3-1 Personnel Profiles for Network Modification ................................................................................................. 3-13-1
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List of tables
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List of figures
1-1 Reverse Procedure ..................................................................................................................................................... 1-81-8
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List of figures
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About this documentAbout this document
Purpose
This document provides an overview of network reconfiguration and offers guidelines
concerning network modification tasks.
Reason for reissue
Issue number Reason for reissue
5b Section Alcatel-Lucent 9100 BTS: Upgrade with New
Modules (p. 2-9) was updated
5a Section Alcatel-Lucent 9110 Micro BTS/9110-E Micro
BTS and 9100 BTS : Add TRE (p. 2-5) was updated.
5 The following section Types 28,18,19,110,180, GPRS
in 15 Minutes Granularity (p. 1-29) was updated.
4 The following sections were updated:
Ater GCH Equity per GP (p. 1-32)
Description (p. 1-29)
3 9130 BSCAvailability Improvement.Weekly Standby
Reset. (p. 1-57) was updated.
2 Updates due to DPVA feature improvement in
Dynamic Power Voltage Adjustment (DPVA)
(p. 1-24)
1 First official release of the document for B12 Release.
New in this release
This section contains information about changes to the current document.
New features
None.
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Other changes
None.
Intended audience
This manual is intended for:
Network modification planners
Operations and Maintenance (O&M) technicians and systems designers
Operators responsible for carrying out the following O&M functions on assigned
BSSs:
As follows:
Configuration
Performance
Fault Management.
Supported systems
This document applies to BSS in technical release B12.
This document contains IP transport in the BSS related information.
The following convention applies for a 9125 TC equipped with a TC STM1 - IP subrack:
TC STM1 interface board is also referred as TCIF
TC STM1 IP interface board is also referred as TCIFI.
How to use this document
No specific recommendation applies regarding the way readers should read this
document.
Prerequisites
You must have a basic understanding of the following:
Mobile Telecommunications Network operations
Alcatel-Lucent O&M concepts for the BSS, as described in the Operations and
Maintenance Principles
The organization of the telecommunications network you are responsible for
operating.
Conventions used
This section gives information on conventions.
Vocabulary conventions
None.
About this document
....................................................................................................................................................................................................................................
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Typographical conventions
The following typographical conventions are used in this document:
Appearance Description
Italicized text Emphasized information.
graphical user interface text Text that is displayed in a graphical user interface or in a
hardware label.
Document reference, reference
number
Related document that is referenced in the document.
Related information
None.
Document support
For support in using this or any other Alcatel-Lucent document, contact Alcatel-Lucent at
one of the following telephone numbers:
1-888-582-3688 (for the United States)
1-317-377-8618 (for all other countries)
Technical support
For technical support, contact your local Alcatel-Lucent customer support team. See the
Alcatel-Lucent Support web site (http://www.alcatel-lucent.com/support/) for contact
information.
How to order
To order Alcatel-Lucent documents, contact your local sales representative or use Online
Customer Support (OLCS) (http://support.alcatel-lucent.com)
How to comment
To comment on this document, go to the Online Comment Form (http://infodoc.alcatel-
lucent.com/comments/) or e-mail your comments to the Comments Hotline
About this document
....................................................................................................................................................................................................................................
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About this document
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1 1Network Modifications
Overview
Purpose
This section provides:
An overview of the network modification process
An overview of the reverse procedure
Procedural guidelines
Information about choosing Abis transmission settings
Network configuration hints
Information about checking for sufficient resources on Abis
Information about new Release B10 feature activation.
Information about new Release B11 feature activation.
Contents
Network Modification Process 1-5
About Network Modification Process 1-5
Reverse Procedure 1-7
About Reverse Procedure 1-7
Procedural Guidelines 1-9
About Procedural Guidelines 1-9
Choose Abis Transmission Settings 1-13
About Choosing Abis Transmission Settings 1-13
Check for Sufficient Resources on Abis 1-16
About Checking for Sufficient Resources on Abis 1-16
Display Timeslot Allocation 1-16
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Check Submultiplexing Scheme of RSL/OML 1-16
Attempt to Add BTS 1-17
Optional Feature Limitation 1-21
About Optional Feature Limitation 1-21
Activate New B12 Features 1-24
Dynamic Power Voltage Adjustment (DPVA) 1-24
Support of 1400 TRX / 7 CCP (6300 Erlangs) 1-24
AUser Plane over IP 1-25
VAMOS 1-27
Types 28,18,19,110,180, GPRS in 15 Minutes Granularity 1-29
RMS Type A&B&C Report in 15 Minutes Granularity 1-31
Ater GCH Equity per GP 1-32
Activate New B11 Features 1-33
About New B11 Features 1-33
IP Transport in BSS 1-33
AMR Signalling Improvements 1-34
Improved Packet Connection Configurations 1-35
Paging Coordination in BSS Support 1-36
Connect Supplementary Equipment to BTS 1-37
A5/3 Ciphering Algorithm Support 1-38
Inter-BSS NACC/ Inter-RAT NACC (3G - ->2G) 1-39
Support of TFO on NB-AMR 1-41
A Signalling over IP 1-42
A-Flex 1-42
Gb Flex 1-43
Lb Interface 1-43
Description of Lb Interface 1-43
Prerequisites for Lb Interface 1-44
Activate Lb Interface Feature 1-45
Deactivate Lb Interface Feature 1-47
IURG 1-47
Avoid Ping Pong between CS and PS Zone 1-48
TRX Dynamic Power Saving 1-49
Network Modifications Overview
....................................................................................................................................................................................................................................
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STM1 on 9130 BSC Evolution 1-49
3G Search Prio wrong in PMO 1-51
AMRWB Cell Load Handling 1-52
Interworking with LTE in the packet domain 1-53
2G to LTE (TDD) Cell Re-selection 1-55
9130 BSCAvailability Improvement.Weekly Standby Reset. 1-57
CS/PS Outage Detection 1-61
OMCP-OMC Supervision Link Defense 1-62
RMS Improvement: Increase of the 42 BCCH-BSIC Pairs Limit 1-64
Antenna Hopping 1-65
Network Synchronization of Radio TS 1-66
Best Effort Qos Handling Without PFC Negotiation 1-67
QoS Implementation to Cope with QQ Congestion 1-68
4 CCCH Time Slots in a Cell 1-71
Radio Measurements Statistics Improved 1-72
User Prioritized Action Based on SIM (SIM Card Access Control) 1-73
One Logical Cell 1-73
Activate New B10 Features 1-75
STM1 in 9125 TC Equipped with TC STM1-IP Subrack 1-75
GboIP 1-77
Mx Capacity Improvement 1-78
Multiple CCCH 1-80
Ping Time Reduction 1-80
Improved Delayed UL TBF release 1-80
Dual Transfer Mode 1-82
Extended Dynamic Allocation 1-83
Adaptive Multiple Rate - Wideband 1-84
2G to 3G/TDSCDMACell Reselection 1-86
Fast 3G Re-selection at 2G CS Call Release 1-88
Alarm Management of External Equipment 1-89
Enable Multislot Classes 30-33 1-90
Half-Rate Activation in Bulk Mode 1-91
Activate New B9 Features 1-93
Network Modifications Overview
....................................................................................................................................................................................................................................
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How to Activate New B9 Features 1-93
Abis Dynamic 1-93
M_EGCH Statistical Multiplexing 1-94
Enhanced Transmission Resource Management 1-94
Counter Improvements 1-95
Electro Magnetic Environment 1-95
GPRS QoS Support 1-97
Enhanced Packet Cell Reselection 1-98
Extended UL TBF Mode 1-99
Autonomous Packet Resource Allocation (RAE4) 1-100
E-GSM: GPRS and Signalling in G1 Band Support 1-100
Improved 2G 3G Cell Reselection 1-101
Load Based 3G HO Filtering 1-102
2G-to-3G HO Preparation 1-102
EGPRS in Uplink Enhanced Support 1-103
RMS Improvement 1-103
SNMPManager in OMC 1-104
Unbalancing TRX Output Power 1-105
Activate New B8 Features 1-106
LCS 1-106
E-GPRS 1-108
Network Modifications Overview
....................................................................................................................................................................................................................................
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Network Modification Process
About Network Modification Process
Overview
The following figure shows the five major steps to modify the network.
Note: Steps 2 and 3 can be performed in reverse order. The Hardware Modification
step can also be performed after the Activation step.
Network Modifications
Network Modification Process
About Network Modification Process
....................................................................................................................................................................................................................................
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Network Modifications
Network Modification Process
About Network Modification Process
....................................................................................................................................................................................................................................
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Reverse Procedure
About Reverse Procedure
Overview
Note: If problems are detected during a scenario, the time interval needed to detect
and correct the fault must take into account the time required to reach a stable
position.
Any investigations must be supported by the manufacturer's support technicians, who
must be called a maximum of 30 minutes after the fault detection. In all cases, the
rollback decision or the investigation continuation decision responsibility belongs to the
customer, but the manufacturer must supply all the elements necessary to make this
decision.
The customer must inform the manufacturer of the projected time required to reach a
stable state (for example: 6:00 AM).
The manufacturer must inform the customer of:
The presence of a problem, and its gravity and impact
The first results of investigations
The time required to reach a stable state after fault correction
The time interval needed for the rollback procedure.
The following figure describes the three major steps involved in a reverse procedure.
Note: Steps 1 and 2 can be performed in reverse order or in parallel.
Network Modifications
Reverse Procedure
About Reverse Procedure
....................................................................................................................................................................................................................................
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Figure 1-1 Reverse Procedure
Network Modifications
Reverse Procedure
About Reverse Procedure
....................................................................................................................................................................................................................................
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Procedural Guidelines
About Procedural Guidelines
Overview
This section provides guidelines concerning several important aspects of network
modification:
Reporting telecom impacts
Ensuring Service Interface (V.11) (Qmux) continuity
Qmux addressing.
This section provides guidelines concerning several important aspects of network
modification:
Reporting Telecom Impact
Some network modification procedures have a telecom impact on the system (traffic lost
or reduced).
In these cases, operators must warn all the areas of their organization that could be
affected by this operation:
Supervision
Operations and Maintenance
Customer Care
Quality, etc.
Ensuring Service Interface (V.11) (Qmux) Continuity
For some procedures (e.g. adding a BTS to an existing Abis link), several BIE of the BTS
on the Abis link must be reprogrammed. In these cases, Qmux bus continuity and unique
addressing must be guaranteed across the network.
If these Qmux conditions are not respected, site access to the BTS is mandatory each time
the network is reconfigured.
Qmux Addressing
The OMC-R operator controls the Qmux address. For an existing BSS, the Qmux address
entered at the OMC-R must match the address installed in the equipment.
At migration, the Qmux address known in the BTS might not always be in line with the
Qmux address known in the BSC. The Qmux address known in the BTS is automatically
set (by OML auto-detection) to the BSC address.
Network Modifications
Procedural Guidelines
About Procedural Guidelines
....................................................................................................................................................................................................................................
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Alcatel-Lucent BSS
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For new BTSs, the OMC-R operator must allocate a unique Qmux address for each BTS.
If the Qmux address is unique at the network level, the Qmux address can be kept when
moving BTS from one BSC to another. Otherwise, it is necessary to change the Qmux
address.
TCUC Overload Handling
TCUCs are BSC processors in charge of handling the TRX/TRE of the BTS. Their load
depends on the channels that they have to handle and on the traffic carried by these
channels (for example, whether a cell is at a location area border or not).
A TCUC can manage up to two dual-rate TRX/TRE, or up to four full-rate TRX/TRE. All
TRE/TRX for which the RSL are multiplexed together are managed by the same TCUC.
The mapping of TRX/TRE is influenced by two types of processes:
Hardware configuration process
This process allocates TRE/RSL (Frame Unit/Carrier Unit) to the TCUC.
To perform this allocation, the following parameters must be taken into account:
Full-rate/dual-rate TRE
Multiplexing scheme (no multiplexing, static, statistical 64k, statistical 16k)
Signaling load: high/normal (applicable for statistical 64k submultiplexing, to
limit multiplexing up to two full-rate TRX/TRE or one dual-rate TRX/TRE)
Multiplexing per BTS or per sector.
Mapping of TRX to TRE
This process maps the TRX (logical channels) on the available TRE. The main
constraint is to map TRX on TRE of the same frequency band.
The mapping of TRX/TRE to TCU is triggered by a number of circumstances:
Extensions
Modification of logical configurations
Failure recovery
Reshuffling.
Most of the processes tend to spread the load (for example, spread TRX handling
SDCCH). However, in the case of partial evolution of the configuration (e.g. modification
of one TRX), to avoid releasing calls, no action is performed to spread the load. This may
lead to overload situations for the TCUC. In this case, the BSC sends the
Processor Alarm[33];SDCCH-OVRL-BSC[9 (begin/end alarm) alarm. The operator
can see overload TCUC alarms by looking at the TCU_Load_Report window. For each
TCUC in overload situation (the alarm begin is received), the OMC-R displays the
corresponding alarm identifier.
The following sections provide some actions and configuration rules that the operator can
follow to either prevent or correct overload situations.
Network Modifications
Procedural Guidelines
About Procedural Guidelines
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Preventive Actions in Hardware Configuration Area
Beginning with Release B7, the BSS supports cells shared by two BTS. Each BTS can be
connected to any TSU of the BSC. If the shared cell is a multiband cell, all SDCCH are
concentrated on only one BTS (e.g. the 900 one) and the other BTS does not support any
SDCCH. Grouping all the 900 BTS on the same TSU will lead to an accumulation of
SDCCH on the same subset of processors. It is recommended to mix BTS 900 and BTS
1800 on the same TSU.
Preventive Actions in Logical Configuration Area
When defining the channels of the TRX, the operator must always spread the SDCCH as
much as possible.
Corrective Actions
There are a number of possible actions, which are more or less efficient, depending on the
configuration.
Remap Logical Channels (RNUSM - TRX Management)
This facility reconsiders the complete mapping of TRX/TRE for a certain cell. It does not
modify the used TCUC; it only remaps the logical channels on these TCUC.
This is:
Efficient for monoband cells mapped on several TCU
Efficient for multiband cells if the TRE of the outer band are carried by several TCUC
Not efficient if all the TRX manage the same number of SDCCH.
RSLRemapping - Balanced Load (BSSUSM)
From Release B8, the Extra Abis timeslots concept provides a potential solution when
performing RSL remapping. The BSC tries to free/find space on TCUs by moving the
extra timeslots of the BTS declared on that TSU. This may lead to telecom outage.
The operator has a choice of three levels of remapping:
Compact RSL/TCU remapping
Balanced load (with possible impact on other TCU)
Balanced load (with no impact on other TCU).
This facility spreads the TRE (and their attached TRX) on the TCU (hardware
configuration action).
It is not efficient when RSL are multiplexed together by groups of four:
BTS with more than four TRE
Static multiplexing
Statistical multiplexing with low signaling load
Multiplexing per BTS.
Network Modifications
Procedural Guidelines
About Procedural Guidelines
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Modify Multiplexing Conditions
This is a prerequisite for an efficient flat hotspot. Note, however, that this action increases
the Abis occupancy and so may be refused due to lack of timeslots on the Abis.
Several modifications are possible, for example:
Go to statistical multiplexing, with a high signaling load
Statistical multiplexing, with multiplexing per sector (this is not recommended if the
number of TRE per sector is three or seven).
Note: The above hints do not cover temporary degraded situations due to hardware
failures. In these situations, the first action to be performed is a repair.
Installing dual-rate TRE has a positive effect on the SDCCH load, because it leads to
using more TCUC but it is not a viable way to solve the overload situation.
Network Modifications
Procedural Guidelines
About Procedural Guidelines
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1-12 Alcatel-Lucent BSS
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Choose Abis Transmission Settings
About Choosing Abis Transmission Settings
Overview
Use the following sections to choose the Abis transmission settings:
Position of the Qmux Bus
Abis Link Capacity.
Position of Qmux Bus
For an Alcatel-Lucent BTS, the transmission configuration is managed using the OML
link.
Abis Link Capacity
When no multiplexing applies, there is/are:
One OML per BTS which takes one 64 kbit/s timeslot
One RSL per TRE which takes one 64 kbit/s timeslot
Eight TCHs for each TRE, using two contiguous timeslots for non-9100 BTS and
9110 Micro BTS/9110 -E Micro BTS. Note that 9100 BTS and 9110 Micro BTS/9110
-E Micro BTS also use two timeslots, but they do not have to be contiguous.
The capacity of an Abis link, in terms of the number of BTS and the number of TRE
depends on:
The multiplexing of control channels
The type full-rate/dual-rate of the TRE.
The following possibilities for Abis multiplexing apply:
Static multiplexing
Statistical submultiplexing (64 kbit/s)
Statistical submultiplexing (16 kbit/s).
To modify the submultiplexing, use Modify OML and RSL Submultiplexing.
Static Multiplexing
Static multiplexing enables you to multiplex up to four RSL channels of the same BTS on
one single timeslot of the Abis frame. It allocates 16 kbit/s per RSL.
Note: Three RSLs cannot be multiplexed on one Abis timeslot.
Network Modifications
Choose Abis Transmission Settings
About Choosing Abis Transmission Settings
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It is supported by the following hardware:
9120 BSC, 9130 BSC Evolution
9100 BTS/9110 Micro BTS.
Statistical Submultiplexing (64 kbit/s)
This enables you to multiplex one OML and up to four RSL of the same BTS onto a
single 64 kbit/s Abis timeslot. It dynamically allocates the bandwidth among the RSLs.
RSLs with more traffic get more bandwidth (up to the complete 64 kbit/s) than RSLs with
less traffic. If dual rate TREs are defined, only two RSL will be multiplexed together with
one OML on the same Abis timeslot.
Note: Three RSLs cannot be multiplexed on one Abis timeslot.
Statistical Submultiplexing (16 kbit/s)
This enables you to multiplex one OML and one RSL of the same BTS into a single 16
kbit/s timeslot nibble (in timeslot 0 of a TRX) available on the Abis in full-rate mode.
Statistical Submultiplexing (16 kbit/s) can be used for small capacity BTS.
Note: Intermediate transmission networks can be used on the Abis Interface (
External Submultiplexers). These can cause specific constraints, such as difficulty
in reconfiguring the 64 kbit/s cross-connects.
The following table describes the number of timeslots available in one Abis link for
use by the TCH and control channels.
Table 1-1 Abis Link Capacity
Supervision By Qmux By OML
Timeslot 0
Transparency (not
used by Qmux)
Timeslot 0 Use
(used by Qmux)
Chain 30 31 31
Network Modifications
Choose Abis Transmission Settings
About Choosing Abis Transmission Settings
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The following table describes the number of timeslots needed per number of TRX for
each type of submultiplexing in one Abis link.
Table 1-2 Timeslots Needed Per Number of TRX for Each Type of
Submultiplexing
No. of TRX Number of Timeslots Needed
No
Multiplexing
Static
Multiplexing
Statistical
Submultiplex-
ing
(64 kbit/s)
Statistical
Submultiplex-
ing
(16 kbit/s)
1 4 4 3 2
2 7 6 5 4
3 10 8 8 6
4 13 10 9 8
5 16 13 12 10
6 19 15 14 12
7 22 17 17 14
8 25 19 18 16
9 28 22 21 18
10 31 24 23 20
11 Not possible 26 26 22
12 Not possible 28 27 24
13 Not possible Not possible 30 26
14 Not possible Not possible Not possible 28
15 Not possible Not possible Not possible 30
Network Modifications
Choose Abis Transmission Settings
About Choosing Abis Transmission Settings
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Check for Sufficient Resources on Abis
About Checking for Sufficient Resources on Abis
Overview
Sufficient resources must exist on the Abis links when you perform a network
modification. For example, when you add a BTS, you must have enough free timeslots
for the TCHs, RSLs, OML and extra Abis TS.
To find out if sufficient resources exist, you can:
Display timeslot allocation
Check the submultiplexing scheme of the RSL
Attempt to add the BTS.
Display Timeslot Allocation
Overview
To find free timeslots on the Abis, use Display Abis Timeslot Allocation and note down
which timeslots are not being used.
Check Submultiplexing Scheme of RSL/OML
Overview
The amount of resources that the signaling links use depends on whether multiplexing
(static or statistical) is used. The following table describes the number of RSL/OML per
timeslot.
Table 1-3 Number of RSL/OML per Timeslot
Type of
Multiplexing
OML per
Timeslot
RSL per
Timeslot
One Timeslot
Shared
Between OML
& RSLs
TRX-Timeslot
0 bits 1-2
used (no other
Timeslot
needed for
RSL, OML)
No Multiplexing 1 1 - -
Network Modifications
Check for Sufficient Resources on Abis
About Checking for Sufficient Resources on Abis
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Table 1-3 Number of RSL/OML per Timeslot (continued)
Type of
Multiplexing
OML per
Timeslot
RSL per
Timeslot
One Timeslot
Shared
Between OML
& RSLs
TRX-Timeslot
0 bits 1-2
used (no other
Timeslot
needed for
RSL, OML)
Static
Multiplexing
(Dual-rate not
allowed)
1 4 (16 kbit/s per
RSL)
- -
Statistical
Submultiplexing
(64 kbit/s)
- - 1 OML+ 1 RSL
1 OML+ 2 RSL
1 OML+ 4 RSL
-
Statistical
Submultiplexing
(16 kbit/s)
(Dual-rate not
allowed)
- - - 1RSL+ 1 OML,
both at 16 kbit/s
at TRX-Timeslot
0 bits 1-2
Attempt to Add BTS
Overview
Attempt to add the BTS, using the Add BTS, New Cell(s) scenario.
In the case of a secondary Abis:
The allocation for OML, RSL and basic timeslots is done only on the first Abis in
limit of the available space
The MAX_EXTRA_TS_PRIMARY setting is taken into account only if the BTS has
a secondary Abis link
Extra Abis timeslots allocation is done on the primary Abis, if MAX_EX-
TRA_TS_PRIMARY>0, after allocating all the signaling links and basic timeslots. If
the secondary Abis is present, only Extra Abis timeslots can be allocated on it.
For example, when MAX_EXTRA_TS_PRIMARY is set to 6, the following allocation
occurs:
Network Modifications
Check for Sufficient Resources on Abis
Check Submultiplexing Scheme of RSL/OML
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If MAX_EXTRA_TS_PRIMARY is set to 31, the primary Abis will be filled completely:
If MAX_EXTRA_TS_PRIMARY is set to 0, the primary Abis and the first TSU is
preserved for future extensions:
When defining the full-rate TCU occupancy, the Eq-FR (equivalent full-rate) is used.
For computing the required Eq-FR for add BTS operation, the operator must take into
account the following:
One TCU supports four Eq-FR
One TCU supports two Eq-DR
OneExtra Abis timeslot = 0.5 Eq-FR
Extra Abis timeslots are mapped only on TCUs supporting TRE full-rate and not on
TCUs supporting dual-rate TRE
Full-rate and dual-rate TREs cannot be combined on the same TCU.
In order to add a BTS on the Abis, the operator should first check:
If the number of available Eq-FR on TSU allows the addition of the BTS
Number of Eq-FR needed for the operation
Number of resources on primary and secondary Abis links.
Network Modifications
Check for Sufficient Resources on Abis
Attempt to Add BTS
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For TSU connectivity, the operator must take the following information into account:
One dual-rate TRX is equivalent to two full-rate TRX
One extra Abis TS used for PS traffic is equivalent with 0.5 full-rate TRX.
During the scenario, if no error messages are displayed, the BTS is successfully added. If
not, use the solutions provided in the following table to solve the resource problems on
the Abis.
Table 1-4 Error Messages for Add BTS
When ... The following error message
appears:
Perform the following ...
There is a lack of TSU space
for RSL, OML and TCH
Lack of primary TSU Eq-FR
for RSL,OML and TCH:
requested: xxx, available:
yyy or Lack of primary TSU
Eq-FR for Extra Abis TS:
requested: xxx, available:
yyy, where:
xxx is the number of Eq-FR
needed for TCH/Extra Abis
timeslots for this TCU
yyy is the is the Eq-FR before
the command for this TSU.
Reshuffle TSU using Remap RSL.
RSL remapping is possible at three
levels:
Compact RSL/TCU remapping
Balanced load (with possible
impact on other TCU
Balanced load (with no impact
on other TCU).
There is a lack of TSU space
for Extra Abis timeslots on the
secondary TSU
Lack of secondary TSU
space: requested Eq-FR:
xxx, available Eq-FR: yyy,
where:
xxx is the number of Eq-FR
needed for TCH/Extra Abis
timeslots for this TCU
yyy is the is the Eq-FR before
the command for this TSU.
Reshuffle TSU using Remap RSL.
RSL remapping is possible at three
levels:
Compact RSL/TCU remapping
Balanced load (with possible
impact on other TCU
Balanced load (with no impact
on other TCU).
There is no space on Abis for
RSL, OML and basic timeslots
Lack of Abis TS for RSL,
OML and TCH: Requested
xxx, available: yyy, where:
xxxIs the total number of
timeslots required to be allocated
for RSL, OML and TCH
yyy Is the number of free usable
timeslots before the execution of
this command.
Defragment Abis Chain.
Fill-Up Primary Abis Chain if the
BTS must be declared on the
secondary Abis of another BTS.
Delete extra timeslots (pools) or
TRE.
Increase/decrease MAX_EXTRA_TS_
PRIMARY.
Network Modifications
Check for Sufficient Resources on Abis
Attempt to Add BTS
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Table 1-4 Error Messages for Add BTS (continued)
When ... The following error message
appears:
Perform the following ...
There is a lack of space for
Extra Abis timeslots
Lack of Abis TS for Extra
Abis TS: requested: xx,
available (1st/2nd Abis):
yy/zz, where:
xxIs the total number of
timeslots required to be allocated
for Extra Abis timeslots
yy/zzIs the number of free
usable timeslots on
primary/secondary Abis for this
BTS, after the execution of the
RSL, OML and TCH mapping.
MAX_EXTRA_TS_PRIMARY
is not taken into account for this
computation.
Defragment Abis Chain.
Fill-Up Primary Abis Chain.
Delete extra timeslots (pools)or
TRE.
Increase/decrease MAX_EXTRA_TS_
PRIMARY
Network Modifications
Check for Sufficient Resources on Abis
Attempt to Add BTS
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Optional Feature Limitation
About Optional Feature Limitation
Overview
A checking mechanism is implemented at OMC level, in order to limit the number of
units when the optional feature is activated. Only the TRX is used as a unit for counting
and inside computation algorithms.
There is a configurable threshold with the default value set to 95%. When the number of
objects configured with any of the locked features is close to the threshold value, the user
receives a warning message.
The following features are locked according to a number of TRX:
EDGE(*)
CS3-CS4(*)
AMR_FR
AMR_HR(*)
Logical TRX
DR TRE
TxDiv TRE
E-GSM Cells
GAN HO
BTS RSL above 12
CS1-CS2( *)
2G-3G HO
2G-3G Interoperability
Streaming QoS(*)
Multi CCCH
2G-3G TDSCDMA
DTM( *)
EDA( *)
EN_MULTISLOT_CLASS_30_33
AMRWB
Repeated ACCH
Paging Coordination in BSS
A5/3 TRE
Network Modifications
Optional Feature Limitation
About Optional Feature Limitation
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Inter-BSS NACC/ Inter-RAT NACC (3G - ->2G)
A Signalling over IP (**)
Support of TFO on NB-AMR
TFO for EFR/FR/HR
TRX dynamic power save
A-Flex
GB over IP
Multi PLMN
Extended Cell
A-bis per satellite
A-Ter per satellite
SMS-CB
Basic LCS.
EN_A51(***)
MC-Module / MC-RRH configuration
Logical Cell
This feature is controlled by the number of TREs configured on the slave MC RRHs
used by the logical cell, together with the number of TRXs defined in the logical cell.
MC-modules configuration in multistandard
BTSAlarms Customization
This feature is alocated per number of BTSs for which external alarm profile is not set
to the default profile. If the number of BTSs for which the external alarm profile is
not the default one, exceeds the purchased limit, the centralized license server rejects
any configuration which requests other BTSs to use non-default profiles.
( *) For these features, there are two possible computation modes for counting used TRX:
Mode 1: The sum of all TRXs belonging to the cells where the feature parameter is set
to enabled.
Mode 2: For all cells having the feature parameter set to enabled and where GPRS is
activated, integer part of (sum MAX_PDCH for all cells)/8.
Note:Only one of the two modes is considered as activated at a time. The total
quantities for the GPRS related features are computed for both computation modes,
but the limit checking is done according to the active mode selected by the customer.
(**) For these features, only one computation mode is used to count the TRXs:
Mode 1: The sum of all TRX belonging to the cells where the feature parameter is set
to enabled.
Network Modifications
Optional Feature Limitation
About Optional Feature Limitation
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(***) This license flag is added in oflcf to lock the A5/1 feature. If the feature is
locked (EN_A51=0), the A5/1 button is grayed in the CELL_CIPH_SET panel in the
RNUSM: Edit Cell Window and it is not possible to change the ciphering algorithm to
A5/1. This is an "all or nothing" licence, and it is not allocated for a certain number of
TRXs.
Note:All the optional features are sold according to a number of TRX. If the operator
exceeds the number of TRX allocated by the contract, the creation and application of
a new configuration is refused at the next PRC activation.
Note: If an optional feature is not allocated by contract, the parameters used to
activate that feature are grey.
Network Modifications
Optional Feature Limitation
About Optional Feature Limitation
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Activate New B12 Features
Dynamic Power Voltage Adjustment (DPVA)
Description
This feature reduces the power consumption of multi carrier devices (MC-TRX,
MC-RRH) in low load situations. It allows to switch the supply voltage for the power
transistor according to the current RF load situation. It requires to switch Power Supply
within the HW in the case of the current GSM Multi Carrier Amplifier generation. The
switching applies to GSM and is realized and adapts the power on a GSM radio timeslot
basis.
Activate Feature
To activate the feature:
...................................................................................................................................................................................................
1 In the RNUSM, PRC or SC windows, select the cells to be configured with DPVA.
...................................................................................................................................................................................................
2 Right click and select Edit ... from the popup menu.
Result:The Edit Cell window opens.
...................................................................................................................................................................................................
3 In Edit Cell window, click on PC Parameters, and next on General PC Ctrl tab.
If not already done, set the EN_POWER_SAVING parameter to Enable.
...................................................................................................................................................................................................
4 In the Edit Cell window, click on Apply and then click on Close.
...................................................................................................................................................................................................
5 If the above steps are performed from the PRC window, Activate PRC.
Support of 1400 TRX / 7 CCP (6300 Erlangs)
Network Modifications
Activate New B12 Features
Dynamic Power Voltage Adjustment (DPVA)
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E N D O F S T E P S...................................................................................................................................................................................................
Description
This feature allows the increase of the MxBSC Evolution capacity by adding two more
CCP boards on ATCA shelf without changing the capacity of the boards compared to the
B11 values (200 TRX/CCP). Inserting these new boards allows adding two new BSC
configurations: configuration 6 to support 1200 TRX and configuration 7 to support 1400
TRX.
The feature includes the commercially linked Abis/Ater flexibility option, which allows
flexible assignment of E1 links between Abis and Ater. It is supported from MxBSC
configuration 6 and 7 and it requires the A Signalling over IP and AUser Plane over IP
features to be activated also.
Activate Feature
To activate the feature refer to Extend 9130 BSC Evolution.
To configure MxBSC using the Abis/Ater flexibility, the same mechanism as in STM1
context is used. Refer to GSM BSS Configuration Rules and Extend 9130 BSC Evolution
.
A User Plane over IP
Description
The AUPoIP feature is available if the BSS is connected to a NGN (MSC-Server and
MGW) core network. Going from legacy TDM to IP Networks and implementing the
NGN concept means that both User and Control planes are managed separately through
IP.
As far as the A Interface is concerned, the A-Signalling over IP (B11 feature) already
splits User Plane/Control Plane on the A Interface and allows to manage A signalling over
IP and the User Plane being still carried over TDM.
The AUser Plane over IP (B12 feature) completes the picture and allows to manage the A
User Plane over IP.
Prerequisites
The following prerequisites apply to activate A User Plane over IP:
A Signalling over IP feature is activated
The parameters: AUPoTDM_COD_SUP and AUPoIP_COD_SUP are set with a value
in accordance with the target AUPoIP mode
The TPGSM capacity is in accordance with the target AUoIP mode.
Network Modifications
Activate New B12 Features
Support of 1400 TRX / 7 CCP (6300 Erlangs)
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