Gsm Bss Swap Guide

GSM BSS Swap Guide-20060430-A-1.0

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Document

Product

number

number Product

Intended for Edited for

GBSS

engineers

and

GSM RNO engineers GSM Product/RNO GEO

GSM BSS

version Document number

GSM BSS Swap Guide Prepared by Reviewed by

Chen Xinting, Yang Jie, Fan Kai, and Yi Hongwei Si Fazhong, etc.

Date

2006-03-02

Date

Reviewed by

Date

Approved by

Date

Huawei Technologies, Co., Ltd. All rights reserved

2015-11-16

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Revision Record Data

Revision Version

Version Description

Author

2006-02-22

V1.0

Initial Version

Chen Xinting, Yang Jie, Fan Kai, and Yi Hongwei

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Table of Contents Chapter 1 Swap Principle and Strategy..............................................................................................8 1.1 Huawei Network Swap Experience........................................................................................... 8 1.2 General Swap Principle........................................................................................................... 9 1.3 Swap Implementation Strategy................................................................................................. 9 1.4 Swap Procedure...................................................................................................................... 9 Chapter 2 Network Information Collection and Evaluation..............................................................13 2.1 Network Information Collection............................................................................................. 13 2.1.1 Basic Information of the Original Network...................................................................13 2.1.2 Basic Needs and Functions of the Original Network.......................................................18 2.1.3 Basic Equipment Information of the Original Network...................................................19 2.1.4 RNP Data of the Original Network...............................................................................23 2.1.5 Core Network KPI of the Original Network..................................................................25 2.1.6 Transmission Networking Information of the Original Network......................................26 2.1.7 Power Supply Configuration of the Original Network....................................................28 2.1.8 Abnormal Network Information and Customer Complaints.............................................29 2.1.9 Customers’ Engineering and Maintenance Capability.....................................................29 2.1.10 Acceptance Information............................................................................................ 30 2.2 Analysis and Evaluation of the Original Network.....................................................................30 2.2.1 DT Evaluation............................................................................................................ 30 2.2.2 Network KPI Evaluation............................................................................................. 31 2.2.3 Other Evaluations....................................................................................................... 32 2.2.4 Confirmation of the Acceptance Indicators after Network Swap......................................36 Chapter 3 Project Survey, Equipment Installation and Test..............................................................36 3.1 Survey and Design................................................................................................................ 36 3.1.1 Survey of BSC/PCU Room......................................................................................... 37 3.1.2 BTS Survey............................................................................................................... 39 3.1.3 M2000 Survey........................................................................................................... 43 3.1.4 Project Design............................................................................................................ 44 3.2 Hardware Installation............................................................................................................ 45 3.2.1 Goods Preparation...................................................................................................... 45 3.2.2 BSC Installation......................................................................................................... 46 3.2.3 Huawei PCU Installation............................................................................................. 46 3.2.4 BTS Installation......................................................................................................... 46 3.2.5 M2000 Installation..................................................................................................... 48 3.2.6 Removing the Equipment of the Original Network.........................................................48 3.3 GBSS Test........................................................................................................................... 48 3.3.1 BSC Test Points......................................................................................................... 48 3.3.2 CDB/CBC Test.......................................................................................................... 49 3.3.3 PCU Test................................................................................................................... 50 3.3.4 BTS Test................................................................................................................... 51 3.3.5 M2000 Test................................................................................................................ 52 3.3.6 Equipment Function Acceptance..................................................................................53 Chapter 4 Network Swap Planning and Network Parameters...........................................................54 4.1 Network Swap Planning........................................................................................................ 54 4.1.1 Whole Network Planning............................................................................................ 54 4.1.2 Network Swap Planning Data Design...........................................................................57 4.1.3 RNP Data Review...................................................................................................... 61 4.2 Network Interconnection Parameter Confirmation....................................................................61 4.2.1 A-interface Interconnection Parameters.........................................................................61 4.2.2 Gb-interface Interconnection Parameters.......................................................................63 4.3 Customer Suggestion............................................................................................................ 64

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Chapter 5 Network Swap Preparations............................................................................................ 65 5.1 Network Swap Solution Design and Review............................................................................65 5.1.1 Overall Swap Solutions............................................................................................... 65 5.1.2 Designing and Reviewing the Solutions Used to Swap Network Elements........................65 5.1.3 Swap Plan and Customer Confirmation.........................................................................66 5.2 Network Swap Preparations................................................................................................... 66 5.2.1 Coordination Meeting and Customer Cooperation..........................................................66 5.2.2 Integration Difficulty Analysis and Emergency Measures...............................................67 5.2.3 Personnel Arrangement, Vehicle Arrangement, Test Tool, Installation Tool, Equipment Preparation, and Emergency Measure....................................................................................67 5.2.4 Version Confirmation and License Application..............................................................70 5.2.5 Swap Data Design and BTS Swap Preparation..............................................................71 5.2.6 Pre-integration........................................................................................................... 73 Chapter 6 Swap Implementation...................................................................................................... 75 6.1 Network Integration on the Swap Day.....................................................................................75 6.1.1 Network Integration Schedule......................................................................................75 6.1.2 Checking Each Network Element (Before Integration)...................................................77 6.1.3 BSC Integration......................................................................................................... 78 6.1.4 MSC-Related Work during BSC Integration..................................................................79 6.1.5 BTS Integration.......................................................................................................... 80 6.1.6 PCU Integration......................................................................................................... 84 BSC overall performance measurement............................................................................................ 84 G-Abis interface performance measurement.....................................................................................84 Pb interface performance measurement............................................................................................ 84 6.1.7 Network Optimization Arrangement.............................................................................85 6.2 Emergency Measures and Changback for Network Integration..................................................85 6.2.1 Emergency Measures.................................................................................................. 85 6.2.2 Changeback Principle Description................................................................................86 6.2.3 Changeback Measures................................................................................................ 87 6.3 Network Monitoring on the Day Next to Swap.........................................................................87 Chapter 7 After-Swap Network Quality Monitoring and Optimization.............................................88 7.1 Online Equipment Problem Handling......................................................................................88 7.1.1 Hardware Problem Handling.......................................................................................88 7.1.2 Complaint Handling................................................................................................... 89 7.1.3 Alarm Analysis........................................................................................................... 89 7.2 Network Monitoring and Optimization....................................................................................90 7.2.1 OMC Traffic Statistics Analysis...................................................................................90 7.2.2 Analysis of NSS-Related Radio Indicators....................................................................92 7.2.3 Analysis of Area DT and CQT and Related Suggestions.................................................93 7.2.4 After-Swap Network Maintenance................................................................................93 7.2.5 Network Optimization................................................................................................ 93 7.3 Customer Communication..................................................................................................... 94 Chapter 8 Swap Acceptance and Document Transformation............................................................94 8.1 Preliminary Acceptance......................................................................................................... 94 8.2 Network Performance Acceptance.......................................................................................... 94 8.3 Document Transformation..................................................................................................... 95 Chapter 9 Swap Risk Analysis......................................................................................................... 95 9.1 Network Information Collection and Risk Evaluation...............................................................95 9.1.1 Risks Caused by Inadequate Understanding of the Performance of the Original Equipment95 9.1.2 Risks Caused by Inaccurate Information.......................................................................95 9.1.3 Case Study................................................................................................................ 96 9.2 Project Survey, Equipment Installation and Commissioning......................................................98 9.2.1 Interconnection Risks................................................................................................. 98 9.2.2 Problems Related to Interconnection of GBSS and G9...................................................98 9.2.3 Risks Concerning BTS Survey.....................................................................................98 9.2.4 Quality Risks Caused by Project Installation Team’s Engineering Level...........................99 9.2.5 Version Risk.............................................................................................................. 99 2015-11-16

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9.2.6 Case Study.............................................................................................................. 100 9.3 Network Planning and Optimization Risk..............................................................................101 9.3.1 Risk Related to Network Indicators............................................................................101 9.3.2 Coverage Risk.......................................................................................................... 102 9.3.3 Inadequate Test before Swap.....................................................................................102 9.3.4 Frequency Planning Risk........................................................................................... 103 9.3.5 Risk Related to Traffic Volume..................................................................................103 9.3.6 Case Study.............................................................................................................. 103 9.4 BSS Integration and Monitoring Risk....................................................................................104 9.4.1 Risk Relate to BSS Integration Solution......................................................................104 9.4.2 Risk Related to BTS Pre-integration...........................................................................105 9.4.3 Risk Related to Transmission Commissioning.............................................................105 9.4.4 Risk Related to BTS Integration.................................................................................105 9.4.5 Emergency Problems Related to BSC Integration........................................................106 9.4.6 Handling of Abnormal Conditions during BTS Integration............................................106 9.4.7 Case Study.............................................................................................................. 107 9.5 Acceptance Risks................................................................................................................ 108 9.5.1 Risk Related to Customer Communication..................................................................108 9.5.2 Risk Related to Acceptance Test before Integration......................................................108 9.5.3 Case Study.............................................................................................................. 109 9.6 Non-technical Risk Analysis................................................................................................ 109 9.6.1 Risk Related to Contract Items...................................................................................109 9.6.2 Risk Related to Project Duration Risk.........................................................................109 9.6.3 Management Risk..................................................................................................... 110 9.6.4 Risk Related to Communication.................................................................................111 9.6.5 Risk Related to Contract Implementation....................................................................111 9.6.6 Risk Related to Work Flow........................................................................................ 112 9.6.7 Case Study............................................................................................................... 112 Appendix: Reference Document Catalog and Network Integration Checklist...................................114 9.7 Reference Document Catalog............................................................................................... 114 9.8 Network Integration Checklist..............................................................................................114 9.8.1 BSC Service Test...................................................................................................... 114 9.8.2 GPRS Dialing Test Checklist.....................................................................................115 9.8.3 A-interface Dialing Test Checklist..............................................................................116 9.8.4 Abis Interface Dialing Test Checklist..........................................................................116 9.8.5 BTS Radio Channel Dialing Test Checklist.................................................................117

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GSM BSS Swap Solution (Template) Key words: swap, integration, GBSS, network optimization Abstract: Compared with the swap documents edited before, this document describes the whole swap procedures based on the swap experience of the current GBSS (the version is BSC32). As with this version, the focuses are on the introduction of the specific swap implementation from the perspective of engineering and the differentiation of the engineering scenarios. In addition, this document also provides the tips on how to control network quality and what should be paid attention to (especially the coverage and parameters) during swap. Furthermore, this document gives the risk analysis and related cases for your reference. In a word, this document can help you improve work efficiency, avoid unexpected problems, reduce technical requirement on engineers, and ensure swap quality.

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Preface What are the characteristics of this document? 

Whole swap procedures are described in this document and the focuses are given to four aspects, including network information collection and evaluation, network optimization, swap implementation, and risk analysis.



The differentiation of the original network information is available and the information collected according to the forms provided in this document can meet swap requirement.



Engineering scenarios and detailed swap steps are provided.



Risk analysis and many cases are available.



Delivery according to contract is appreciated.



Control of network swap quality is emphasized.



Swap cases are updated.

How to use this document? Network swap is a systematic project, so it must be implemented according to steps. More importantly, good planning and network monitoring are necessary. 

This document consists of several chapters, but the actual swap process can be divided into three parts, including network information collection (Chapter 1, 2, and 3), swap implementation (Chapter 4, 5, and 6), and network monitoring and acceptance (Chapter 7 and 8).



Collecting and evaluating the information of the original network is the most important for a successful swap. Therefore, the earlier to provide technical service and use this document, the better for the network swap. Generally, this document must be used after contract signature but before network swap so that the network information collection and evaluation can be finished as soon as possible.



The parts for survey, installation and commissioning, and integration preparation are for the implementation engineers’ reference.



This document can be used as the template of network swap and integration during the implementation of a swap project.



The parts for RNP and RNO are for the RNO engineers’ reference.



The parts for risk analysis are for project engineers’ reference.

Note: In this document, the “original network” refers to the network need to be swapped but has not been swapped.

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Chapter 1 Swap Principle and Strategy At present, the GSM technology is mature than ever before, and so is the market competition. Therefore, GSM network swap, especially the swap of the base station system, will surely become the trend. The GSM network swap is a complex systematic project for the following considerations: 

Multiple operators’ equipments are involved.



The features of the equipments vary with operators.



The network structure will change after swap.



The quality of the swap implementation must be ensured.



The cooperation of different operators’ equipments must be available.



The RNP and RNO level is a great concern during network swap.



The performance of various equipments may be greatly different in the same geographic environment.

As a leading GSM equipment provider in the world, Huawei has swapped multiple operators’ networks and has acculturated rich experience. Hereunder lists several examples and gives a general description of the swap strategies.

1.1 Huawei Network Swap Experience Huawei GSM system has been widely used in the worldwide. By December 2005, Huawei has swapped 300, 000 TRXs and more than 50,000 BTSs and the equipments of many world-honored operators are involved, including Motorola, Siemens, Ericsson, Nokia, Bell, Alcatel, Nortel, Lucent, etc. Huawei has accumulated rich experience in network swap through these projects, among which the major projects are listed in Table 1.1. Table 1.1 Major swap projects implemented by Huawei Country or region

Operator

Equipment

provider

of

the

Swap scale

original network Philippines

Digitel

Alcatel

5893TRX

Nigeria

MTN

Ericsson

4795TRX

Liaoning Province

Unicom

Lucent

6241TRX

Indonesia

Indosat

Siemens

4552TRX

Sichuan Province

China Mobile

Ericsson

4505TRX

Colombia

Movil

Siemens

1300TRX

Guangdong

China Unicom

Motorola

4405TRX

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Zhejiang

China Unicom

Nortel

870TRX

Fujian Province

China Mobile

Nokia

3000TRX

Inner Mongolia

China Mobile

Nokia

1065TRX

 Note: 

Actually, multiple network elements, such as MSC, HLR, and GPRS part, are involved in GSM network swap. In this case, you should swap the core network part, and then swap the base station part.



If network expansion and construction should be performed during the swap, you should swap the network first so that the smooth transition of the network can be ensured.



The network indicators must be consistent with that specified in the contract for delivery.

1.2 General Swap Principle The swap of the GBSS is the same as that of other network elements and the following four principles should be followed: 

Security



Excellent quality and low cost



Smooth transition



High efficiency

1.3 Swap Implementation Strategy From the perspective of the effect against the network, the following strategies can be used for GBSS swap. 

Parallel swap



One-time swap



Batch swap (recommended)



Mixed swap

1.4 Swap Procedure This document introduces the whole swap procedures, including network information collection and evaluation, equipment installation and commissioning, network swap planning, integration solution design, swap preparation, integration preparation, after-integration test and optimization, and swap acceptance. The key tasks are network information collection and swap implementation. Figure 1.1 shows the whole network swap procedure.

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Start, contract information

Communicate with customers , make contract and technical proposal

Netw ork information collection

Basic information of the original network/ basic need and function/equipment information/RNP data/core network KPI/ transmission networking/power supply configuration/abnormal network information and customer complaint/customers' engineering and maintenance capability/ acceptance standards

Analysis and evaluation of the original netw ork

DT test/KPI evaluation/CQT for VIP area/ GPRSCQT and GPRS DT test/external interference test/CW test/simulation/MOS test/coverage comparison test

Project survey and design

BSC/PCU/BTS/project design file for M2000/survey report

Goods preparation, shipment, transportation, customs clearance, storage, goods distribution

Hardware installation

Install g temporary BTS

Install BSC/PCU/M2000

Transmission adequate or not ?

N

Install BTS equipment

Cabinet installation space adequate or not?

Allocate temporary transmission resource

N

Temporary

N

installation space?

Y

Y Y Constructing new power supply?

Hardw are installation completed

N

Y BSC/PCU hardw are check, acceptance, pow er-on test, hardw are status

Constructing new antenna

N

Y Hardw are installation completed

BSC/PCU commissioning

Connect to core netw ork

Joint debugging w ith BSC

Y

BTS transmissio qualified or not?

N

BTS off-line test

Acceptance test for various functions, services, and BSC/PCU equipment

Netw ork sw ap implementation

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Netw ork sw ap implementation

Netw ork sw ap planning

Total netw ork planning/after-sw ap acceptance/sw ap RNP data design/planning data review /interconnection parameter confirmation

Sw ap solution design

General network swap solution/design and review for the swap solutions to network elements/integration plan and customer confirmation

Sw ap preparation

Integration coordiination and affairs needing customers' cooperation/analyzing integration difficulties and making emergency measures for integration failure/ personnel arrangement, vehicle arrangement, test tool, installation tool, spare part preparation and emergent measures/data preparation

Pre-integration or not?

Y

Pre-integration

Test passed or not?

N

N

Failure processing

Y Transmission confirmation

The transmission at the A/A-sub/Abis/Pb/Gb interfaces need to be confirmed.

BSC integration Is each network element normal before integration？

N

Failure processing

Y BSC A-interface integration

Does BSC run normally?

A-interface dialing test table/netw ork element status check/traffic statistics registration

N

Failure processing

Success or not?

N

Changeback of the data of the original BSC

Y

End

Y Shut dow n the original BTS

BTS integration

Remove the original BTS

Package the orginal cabinet properly

Install new cabinet, pow er-on check the hardw are

Focus attention on checking TRX transmit pow er

Transmission system integration

BTS on-line test

Focus attention on testing TRX call and service

Antenna and feeder system integration

Focus attention on testing standing-to-w ave ratio

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The test contents include signal strength, Ec/Io, interference indicators, and site distance

Field DT acceptance

Analyze test results and check BTS running state

Success or not?

N

Y

Failure processing

Success or not?

N

Change back to the original BTS

Y

End

Integration completed

Netw ork quality monitoring and optimization after sw ap

Process equipment problems online

Equipment failure processing/complaint processing/alarm analysis

Netw ork evaluation

KPI analysis: voice KPI analysis/packet service KPI analysis/NSS-side indicator analysis/DT analysis/CQT analysis

Netw ork optimization adjustment

N Meet the requirement specified in contract or not?

Y Sw ap acceptance/documentation handover

End

Figure 1.1 Whole network swap procedures

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Chapter 2 Network Information Collection and Evaluation Engineering capability is the key to the success of a swap project. To improve work efficiency and thoroughly understand customers’ needs, you should collect the related network information beforehand. This chapter introduces the information needed to be collected before swapping a network. You can obtain the data through contract review, customer communication, field test, etc.

2.1 Network Information Collection The following information of the original network must be collected: 

Basic information of the network



Basic needs and functions



Basic information on the operation of online equipment



RNP data



Transmission and networking information



Information of power supply configuration



Abnormal network information and customers’ complaints



Customers’ engineering and maintenance capability

2.1.1 Basic Information of the Original Network I. Network Structure of the Original Network The network structure of the original network should contain the basic information of the main equipments, such as the MSC, BSC (PCU), and the overall BTS layout. If packet service is available in the original network, the information of the packet equipments, such as SGSN and GGSN, should be included. If the core network needs to be swapped, the basic networking information of the HLR and MSC should be included. In addition, the description of the configuration and capacity of the network should also be provided based on the networking diagram. If possible, you can configure the BTS layout created by MAOINFO. If you have an all-round understanding of the above information, you can know more about the total network and see more clearly the order and difficulty of the swap project. Figure 1.1 shows the schematic drawing of a GSM network.

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Figure 1.1 Schematic drawing of a GSM network In the urban area of XX city, the operator S has 2 MSCs. MSC1 can accommodate 270,000 users and has 5 BSCs. They are S BSC2, S BSC5, S BSC 6, S BSC 12, and Huawei BSC2, responsible for the covering eastern XX district, XX district, and XX road. MSC2 can accommodate 300,000 users and has 6 BSCs. They are S BSC4, S BSC7, SBSC8, S BSC11, S BSC20 and SBSC4, responsible for covering XX district and XX road. In the urban area of XXX city, there is 1 Huawei MSC. MSC4 can accommodate 270,000 users and has 6 BSCs. They are S BSC1, S BSC3, S BSC10, Huawei BSC1, Huawei BSC5, and Huawei BSC6, responsible for covering XX district and XX road.

II. Configuration Information of the Original Network The configuration information of the original network includes equipment configuration information, capacity information, provider information, BSC home information, BTS number under BSC, TRX number, etc. For details, see the following two tables. Table 1.1 MSC information in XXX city Equipment

Original

No.

Name

Capacity

Operator

Version

BSC Carried

1

MSC1

270,000

S

SR9

BSC2, 5, 6, 12, HWBSC12

2

MSC2

300,000

N

SR9

BSC4, 7, 8, 11, 20, HWBSC4

3

MSC4

270,000

Huawei

G6

BSC1, 3, 10, HWBSC1, 5, 6

4

MSC3

220,000

E

R12

BSC9, 13, 14, 18, 19, HWBSC3

Table 1.2 BSC information in XXX city No.

BSC Name

2015-11-16

Operator

BTS number

TRX number

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Coverage area

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1 2 3

SBSC12 HWBSC2 HWBSC4

S Huawei Huawei

For internal use only

44 47 30

197 317 220

III. OMC Networking Diagram and Network Management System Information For the networks large in size and the network elements are distributed in vast areas, the OMC networking is often complex. In this case, multiple routers and switches are needed for communication. Sometimes the original semi-permanent connection equipment or timeslot insertion equipment can be used for the networking. Therefore, you are suggested to collect the OMC networking diagram of the original network. If the original OMC networking is simple and all the equipments are concentrated in a place, you can use simple local area network for TCP/IP communication. But before that, you should understand the composition of the local area network. In a word, it is a must for you to understand the original network management information and the accessibility of the third party’s equipments. Before swapping a network, you should have an overall understanding of the following contents: 

The topology of the network



The accessibility of the third party’s equipments for alarming and traffic statistics



The formats and interface standards of the original traffic statistics and alarming data (Generally, TCP/IP is used for data connection and FTP is used for data transmission)



The types of the wide area network, including ISDN, DDN, X.25, frame relay, etc.



The components of the network, including HUB, exchange, router, ATM exchange, WAN exchange, access server, timeslot integration equipment, etc.



The performance of the network, especially the indicators about bandwidth and delay.

Figure 1.1 shows the OMC networking diagram used in XXX area.

Figure 1.1 The OMC networking diagram in XXX area 2015-11-16

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IV. Traffic Model of the Original Network The traffic model of the original network should be collected. Traffic model is the basic data for network capacity planning. Generally, the total network capacity is predicted according to mathematic models. First the traffic model is used to calculate the traffic volume of the system, and then the structure of the PLMN can be used to estimate the traffic volume present of interface, while the traffic volume of each interface can be used to decide the configuration of the voice circuits and signaling links at the interfaces. Finally, the TRX channel configuration of the base station can be decided. Traffic model will be greatly affected by social environment, economy, and main user groups and will change with the growth of user number. Customers’ RNP departments are responsible for providing the traffic model, so there is no unified standard. At present, the traffic model for voice service is mostly emphasized. Table 1.1 introduces the traffic model for the voice service of a domestic GSM network. Table 1.1 Traffic model for GSM voice service (a domestic GSM network) Item Busy-hour Erlang per subscriber Average call hold time Calling mobile subscribers Called mobile subscribers Calls made by each mobile subscriber at busy hour Call connected ratio Mobile subscriber location update at busy hour Secondary page ratio caused by called mobile subscriber Handovers for each call made by mobile subscriber Short messages send by each mobile subscriber at busy hour Short messages received by each mobile subscriber at busy hour Ratio of mobile subscribers roaming inside to total mobile subscribers Ratio of mobile subscribers roaming outside to total mobile subscribers Mobile subscriber activation ratio Mobile-Mobile Fix-Mobile Traffic distribution Mobile-Fix

Traffic model-1 0.018 48 39 57

Traffic model-2 0.018 48 39 57

1.35

1.35

80% 1.21

80% 2.61

20%

20%

1

1.7

128

100

384

211

10%

10%

10%

10%

100% 40% 36% 24%

100% 40% 36% 24%

Table 1.2 introduces the traffic model for the voice service of a foreign GSM network.

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Table 1.2 Traffic model for GSM voice service (a foreign GSM network) Parameters Average Call Hold Time Erlang per Subscriber BHCA Mmobile to Mobile Mobile to Other PLMN Mobile to PSTN PSTN to Mobile SMS Numbers/BH/SUB(MO) SMS Numbers/BH/SUB(MT) Ratio of IN subscribers location update numbers/BH/SUB location update numbers/BH/SUB(to HLR) Authentication numbers/BH/SUB

Value 72s 0.02 0.5MO+0.5MT 60% – 20% – 1 1 95% 1.5 0.3 0.3

Remark – – – – – – – – – – – – –

Table 1.3 introduces the traffic model for packet data service. Table 1.3 Traffic model for packet data service Item GOS of circuit service Busy-hour Erlang per subscriber for circuit service GPRS user penetration rate IP layer bandwidth for each (BYTE/s) Bandwidth for each GPRS channel (BYTE/s) Busy-hour bandwidth for each GPRS subscriber (bps) GoS of GPRS service

Value 2% 0.03 50.00% 2500 2000 400 2%

Remark For reference For reference

 Note: The increase of the SMS will raise the load on the NO.7 signaling link. Therefore, if the SMS takes a larger ratio, the configuration of the NO.7 signaling link should be adjusted accordingly; otherwise the SDCCH and NO.7 signaling link will be congested.

V. Customers’ Charging Setting Information Generally, you can collect the customers’ charging setting information from their market departments. There information to be collected includes the followings: 

Time for free of charge Some operators set the time for free call. Generally, in this period of time, the traffic volume will grow rapidly and thus network congestion may be caused.



Monthly fee policies, including monthly fee for the calls made within the same network, monthly fee for called services, and monthly fee for packet data service.



Charging policies for SMS 2015-11-16

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2.1.2 Basic Needs and Functions of the Original Network You should analyze the basic needs and functions of the network according to the technical proposals made in contracts, especially you should check if the needs and functions that have been realized in the original network can be realized by Huawei BSS and if they are supported by Huawei software. If you find any problem, contact the technical supports as quickly as possible. Table 1.1 lists the basic services and functions of the original network.

Table 1.1 Basic services and functions of the original network Item Voice version Encryption setting Circuited data service TFO Cell broadcast

Content FR No Not support Support Support

EFR A50 2.4K

Remark – – – – Cell name,

HR AMR A51 A52 4.8K 9.6K Not support Not support

advertisement, LCS SDCCH dynamic allocation Mutual aid between main

Support Support Support

Not support Not support Not support

whether reports – – –

BCCHs MNC digit

Support

Not support

–

function Concentric cell CO-BCCH GS interface Extended cell GPRS/EDGE BSC/BTS intra-exchange Authentication Paging mechanism

Support Support Support Support Support Support – LAC paging

Not support Not support Not support Not support Not support Not support – LAC and

– – – – – – – Other paging

2G/3G handover Acoustic Echo Canceller

Support Support

paging Not support Not support

Noise Suppression

Support

Not support

extension

CI

–

2.1.3 Basic Equipment Information of the Original Network I. GSM Protocol Standard Phase Version For A-interface, the phase versions are PHASE2+, PHASE2, and PHASE1.

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 Note: To avoid that some functions cannot be realized normally after interconnection, you should check the protocol phase version supported by the original equipment if the original network has been there for a long time. You are suggested to use singling analyzer to collect the messages sent across the A-interface and Abis interface at busy hour and send them to technical supports for verification.

II. Software Version Information Table 1.1 lists the software version information of some network elements. Table 1.1 Software version information of MSC, BSC, and BTS No. 1 2 3 4

Equipment MSC1 MSC4 BSC2 BSC1

Operator S Huawei S N

Type – G6 – –

Software version SR9 R003 SR9 R10

Remark – – – –

5

BTS

N

ULTRASITE

DE21

–

III. BSC Configuration Information Table 1.1 lists the BSC configuration information Table 1.1 BSC configuration information BSC

Location

Operator

BTS

TRX

number

number

Half

rate

EDGE

TRX

TRX

number

number

Coverage

Slave

area

MSC

Urban area SBSC12

–

S

44

197

100

90

1 Urban area

MSC3

HWBSC2

–

Huawei

47

317

231

123

2 Suburban

MSC2

HWBSC4

–

Huawei

30

220

125

46

area

MSC3

IV. BTS Configuration Information Table 1.1 lists the BTS configuration information.

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Table 1.1 BTS configuration information Cell BTS

Location

Operator

Type

configuratio n

TRX

Transmission

E1

Slave

number

mode

number

BSC

BFM K KPR

XX city

S

R11

S222

6

Micro wave

1

MSC3

I CBI

XX island

Huawei

3002C

O1

1

Satellite

1

MSC2

O

XXX

Huawei

312

S3443

14

Optical fibre

2

MSC3

V. TRX Configuration, Combiner Information, Set-top Power

Table 1.1 TRX configuration, combiner information, set-top power BTS Type A9100 BTS30

BTS312

Operator

Configurati

A Huawei

on S666 S222

Huawei

S666

Combiner Type

Combination

ANC+ANY CDU

Mode 4-to-1 2-to-1

2CDU+SCU

Concentric cell

Combiner loss

Set-top

8dB 4.5 dB

Power 7.1W 21.4W Underlay

Overlay:8dB;

:21.4W;

underlay:4.5dB

Overlay: 9.5W

 Note: You are suggested to select the BTSs with typical configuration and perform field verification of the set-top power. In addition, you should check if the partner has installed the lightening protector.

VI. Tower Amplifier Information If the tower amplifier is configured for the original BTS, you should collect the tower amplifier information, as listed in Table 1.1.

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Table 1.1 Tower amplifier information Specification

Operator

Type

Frequency

Receiver

Working

Working

band

gain

voltage

current

Power supply mode CDU

–

–

Triplex

900

12dB

12DC

100-200mA

feeder

–

–

Duplex

1800

–

–

–

–

–

–

Simplex

–

–

–

–

–

VII. Feeder Configuration Principle The feeders 7/8 and 5/4 are most commonly used. Some operators also use the feeder 18/8.

VIII. BTS Grounding Principle and Feeder Grounding Principle The BTS grounding principle and feeder grounding principle vary with operators. For example, the operators in Indonesia have no requirement on feeder grounding, but the operators in Iran do not allow the feeder to be connected with the tower directly.

IX. Indoor Coverage Distribution System Information Indoor coverage is used to improve the mobile communication quality for indoor users. The principle of the indoor coverage system is to use the indoor antenna distribution system to evenly distribute the signals from the BTS in an indoor environment. At present, the following solutions are used for indoor coverage. 

Repeater + distribution antenna



Macro cell + distribution antenna



Micro cell + distribution antenna



Mini-micro cell + distribution antenna



Mini-micro cell only

You should pay attention to collect the indoor coverage solution used in the original network. If distribution antenna system is used, you should especially know the feeder configuration principle of the distribution antenna system and check if there is diversity reception.

X. Repeater Information The repeater is used in vast areas to cover the indoor dead zones and is the coverage extension of the surrounding BTSs. The types of repeaters include wireless frequency selection repeater, optical frequency selection repeater, wireless wide band repeater, and optical wide band repeater. You should have an overall understanding of the repeaters in the original network and pay special attention to the repeater location, transmit power, channel number setting, antenna configuration, etc. Table 1.1 lists the repeater information should be collected. 2015-11-16

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Table 1.1 Repeater information

Type Provider and

Band or

specification

Channel Selective

AFL GSM 900

Allgon AR 120

Band

Channel

GSM 900

Mikom MR 340

Channel

Gain

Power

/dB

Downli

nk )

Figure

/dB

Downli (Uplink

Noise

Downli

nk

nk

(Uplink

(Uplink

)

)

Order Intercep t

No.

/dBm

of

Size

Downli

Channe

/mm

nk

ls

(Uplink )

1,5,10,20

30,50,80,

4.5

40,47,50,

,25 W

95

(4.5)

54

550 x

(30,50,8

(40,47,5

220

0,95)

0,54)

24

40-60