B12

Title page

Alcatel-Lucent

Base Station Subsystem | B12

Network Reconfiguration Recommendations

9YZ-03803-1862-PCZZA

Issue 5b | February 2013

Legal notice

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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


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

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User Prioritized Action Based on SIM (SIM Card Access Control) .................................................................... 1-731-73

One Logical Cell ..................................................................................................................................................................... 1-731-73


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


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

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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


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

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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

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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

([email protected]).

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


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


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



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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


LCS 1-106

E-GPRS 1-108


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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



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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.


Reverse Procedure


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Figure 1-1 Reverse Procedure


Reverse Procedure


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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.




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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.




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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.




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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.




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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.




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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




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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




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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 - -



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:



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.



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:


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:


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.



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



Attempt to Add BTS

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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




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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.




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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.




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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)




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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.



Support of 1400 TRX / 7 CCP (6300 Erlangs)

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Documents

B12