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TitleGsm Bss Swap Guide
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Table of Contents
                            Chapter 1 Swap Principle and Strategy
	1.1 Huawei Network Swap Experience
	1.2 General Swap Principle
	1.3 Swap Implementation Strategy
	1.4 Swap Procedure
Chapter 2 Network Information Collection and Evaluation
	2.1 Network Information Collection
		2.1.1 Basic Information of the Original Network
			I. Network Structure of the Original Network
			II. Configuration Information of the Original Network
			III. OMC Networking Diagram and Network Management System Information
			IV. Traffic Model of the Original Network
			V. Customers’ Charging Setting Information
		2.1.2 Basic Needs and Functions of the Original Network
		2.1.3 Basic Equipment Information of the Original Network
			I. GSM Protocol Standard Phase Version
			II. Software Version Information
			III. BSC Configuration Information
			IV. BTS Configuration Information
			V. TRX Configuration, Combiner Information, Set-top Power
			VI. Tower Amplifier Information
			VII. Feeder Configuration Principle
			VIII. BTS Grounding Principle and Feeder Grounding Principle
			IX. Indoor Coverage Distribution System Information
			X. Repeater Information
			XI. Movable BTS Information
		2.1.4 RNP Data of the Original Network
			I. Proejct Parameters
			II. Radio Parameters of the Original Network Providers and Special Functions
			III. Original Network Traffic Statistical Data and KPI Formula
			IV. Network Planning Principle
			V. Channel Configuration
			VI. MSC and RNP-related Information
		2.1.5 Core Network KPI of the Original Network
			I. MSC KPI of the Original Network
			II. PS KPI of the Original Network
			III. Maximum Rate for User Subscription
		2.1.6 Transmission Networking Information of the Original Network
			I. BTS Transmission Networking Information
			II. E1 Reuse Ratio of the Typically-configured BTS
			III. E1 Types
			IV. Microwave Transmission Equipment
			V. Optical Fiber Information
			VI. Satellite Transmission Equipment
			VII. HDSL and SDSL Transmission Equipment
			VIII. Timeslot Consolidation Equipment
			IX. Transmission Compression Equipment
			X. BTS Concatention and Transmission Concatention
		2.1.7 Power Supply Configuration of the Original Network
		2.1.8 Abnormal Network Information and Customer Complaints
			I. Network Failures and Alarming Information
			II. Customer Complaints
		2.1.9 Customers’ Engineering and Maintenance Capability
		2.1.10 Acceptance Information
	2.2 Analysis and Evaluation of the Original Network
		2.2.1 DT Evaluation
			I. Principle
			II. Area DT
			III. DT for Main Roads and VIP Areas
			IV. DT Data Analysis
			V. DT for Indoor Distribution System
		2.2.2 Network KPI Evaluation
			I. Difference of KPI Formulas
			II. Evaluation Principle
			III. Evaluation of Indicators about Voice, Signaling, and Capacity
			IV. Evaluation of Quality Indicators
			V. NSS-related Indicators
		2.2.3 Other Evaluations
			I. CQT for VIP Areas
			II. GPRS Evaluation
			III. External Interference Test
			IV. CW Test
				1) Select a suitable site to establish the test platform.
				2) Install signal source and antenna.
				3) Perform DT using the corresponding software.
				4) Process and analyze the DT data through corresponding software
			V. Simulation
			VI. MOS Test
		2.2.4 Confirmation of the Acceptance Indicators after Network Swap
			I. Coverage Comparison
			II. Statement of Compliance
			III. KPI Formulas and Other Test Methods
			IV. KPI Commitment Evaluation and Guidance
Chapter 3 Project Survey, Equipment Installation and Test
	3.1 Survey and Design
		3.1.1 Survey of BSC/PCU Room
		3.1.2 BTS Survey
		3.1.3 M2000 Survey
			I. Equivalent Network Element
			II. About M2000
		3.1.4 Project Design
	3.2 Hardware Installation
		3.2.1 Goods Preparation
		3.2.2 BSC Installation
			I. Constructing a New BSC
			II. Expanding the Capacity of an Existing BSC Through Adding BM
			III. Expanding the Capacity of an Existing BSC Through Adding BIE Board Only
			IV. Expanding the Capacity of an Existing BSC Through Adding BTS Only
		3.2.3 Huawei PCU Installation
		3.2.4 BTS Installation
			I. Antennas and Feeders
			II. BTS Installation Room
			III. BTS Transmission
			IV. BTS Power Supplier
		3.2.5 M2000 Installation
		3.2.6 Removing the Equipment of the Original Network
	3.3 GBSS Test
		3.3.1 BSC Test Points
		3.3.2 CDB/CBC Test
			I. Testing Connection between CDB and GMEM
			II. Testing Connection between CDB and CBC
			III. Testing Short Message Display (MS)
			IV. Precautions about CDB&CBC Test
		3.3.3 PCU Test
		3.3.4 BTS Test
			I. Off-line Test
			II. On-line Test and Coverage Evaluation
				Generally, you can make the test and evaluation according to following steps:
				1) Test and evaluate the set-top power of the typically-configured BTSs and record the results. After that, disconnect the antennas and feeders of the original BTSs and test the indicators (such as the standing wave ratio) of the antenna feeder system to see if the they meet the requirement of Huawei BTS. If yes, the antennas and feeders of the original network can be integrated into the Huawei BTS; otherwise you should make corresponding measures according based on the customer’s permission.
				2) Integrate the trunks of the original network into the Huawei BTS temporarily.
				3) After the BTS finishes loading the data automatically, you should use frequency locking function of the MS to make dialing test. Note that each channel number and timeslot should be tested. In addition, you should also perform DT to test the coverage and handover.
				4) After the test, you should recover the equipment to the original state, and then evaluate the coverage of the original network. This operation can be made before the on-line test.
				5) Compare the set-top power and the coverage of the new network with that of the original network and take anti-risk measures according to actual conditions.
		3.3.5 M2000 Test
			I. Partial E1/T1 Networking
			II. Network Debugging (Partial E1/T1 networking mode)
		3.3.6 Equipment Function Acceptance
Chapter 4 Network Swap Planning and Network Parameters
	4.1 Network Swap Planning
		4.1.1 Whole Network Planning
			I. Coverage Planning
			II. Capacity Planning
			III. Frequency Planning
			IV. LAC and CI Planning
			V. Radio Parameter Planning
			VI. Huawei Functional Parameter Planning
			VII. Special Scenarios
		4.1.2 Network Swap Planning Data Design
			I. Designing Network Swap Planning Data
			II. Designing Other Data
			III. Designing Data for Secondary Integration
		4.1.3 RNP Data Review
	4.2 Network Interconnection Parameter Confirmation
		4.2.1 A-interface Interconnection Parameters
		4.2.2 Gb-interface Interconnection Parameters
	4.3 Customer Suggestion
Chapter 5 Network Swap Preparations
	5.1 Network Swap Solution Design and Review
		5.1.1 Overall Swap Solutions
		5.1.2 Designing and Reviewing the Solutions Used to Swap Network Elements
		5.1.3 Swap Plan and Customer Confirmation
	5.2 Network Swap Preparations
		5.2.1 Coordination Meeting and Customer Cooperation
		5.2.2 Integration Difficulty Analysis and Emergency Measures
		5.2.3 Personnel Arrangement, Vehicle Arrangement, Test Tool, Installation Tool, Equipment Preparation, and Emergency Measure
			I. Personnel Arrangement
			II. Vehicle Arrangement
			III. Test Tool and Installation Tool
			IV. Spare Part Preparation
			V. Emergency Measures
		5.2.4 Version Confirmation and License Application
		5.2.5 Swap Data Design and BTS Swap Preparation
			I. BSC Swap Data
				1) Submit the reviewed RNP&RNO data to the project supervisor
				2) Design BSC hardware data, BTS hardware data, interconnection data, and network planning data. After that, the project supervisor should check the data according to the following instructions:
				3) Check DBF data
			II. MSC Data
			III. PCU Data
			IV. SGSN Data
			V. BTS Integration
			VI. Network Optimization Integration Preparations
		5.2.6 Pre-integration
Chapter 6 Swap Implementation
	6.1 Network Integration on the Swap Day
		6.1.1 Network Integration Schedule
		6.1.2 Checking Each Network Element (Before Integration)
			I. Checking GBSS Running Status
				1) Query the running status and alarming information of the BTSs attached to the original BSC and record them. Meanwhile, report them to the related personnel of XXX Company and require them to solve the problems affecting network integration as quickly as possible.
				2) Check the status of each BSC board at the maintenance console and check if the indicator of each BSC board is correct.
				3) Check the status of the relay circuit of the A-interface. The NSS engineers of XXX Company should cooperate with Huawei engineers to query the status of the relay-circuit of the A-interface at the MSC side.
				4) Check the status of each No.7 signaling link and query the status of LAPD link.
				5) Check the status of each enabled BTS, BTS board, and channel. (For example, check if there is congested channel.)
				6) Check the status of special equipments, such as the semi-permanent connection equipment and timeslot extraction equipment.
				7) Check if there is other abnormal condition.
			II. Confirming GPRS Status
			III. Checking the Status of Related Network Elements
		6.1.3 BSC Integration
		6.1.4 MSC-Related Work during BSC Integration
			I. Debugging A-interface
			II. Integrating BSC after A-interface Debugging
			III. Conclusion
				1) Test phase
				2) Integration preparation
				3) Resource requirements at the core network
		6.1.5 BTS Integration
			I. Installation Steps
				1) After confirming the BSC port, confirm that the BTS-side transmission port is correct through self-loop test.
				2) Disconnect the power supply of the BTS and move out the original power supply cabinet and BTS. When moving out the BTS, you do not have to move the connection line and antenna feeder so that that the BTS can be changed back to the original position in emergency conditions.
				3) Finish installing Huawei power supply cabinet, power on the cabinet with alternating current, and observe the running status of each module. After that, disconnect the power supply.
				4) Install Huawei BTS at the corresponding location; connect the transmission line, power supply cable, and grounding line. If the time is urgent, you do not have to fix the BTS and secondary installation is allowed.
				5) When Huawei BTS is powered on, observe the status of the indicator.
				6) Connect transmission to Huawei BTS and check if the status of LIU1 is normal. After the transmission is normal, check if the BTS runs normally. During this period, do not disconnect the power supply of the BTS. If software needs to be upgraded, you need to notify the BSC to upgrade the related software or perform near end upgrade.
				7) After the BTS runs normally, you can connect the jumpers and the lightening protector. If the time is urgent, you do not have to fix them and secondary installation is allowed.
				8) Finish the standing wave test from the CDU interface is necessary. No instrument can be used to observe the standing wave indicator of the CDU.
				9) After the BTS is initialized, perform dialing test and handover test. In addition, you should test power and confirm cell direction. Other ATP tests can also be performed.
				10) If all the test results are normal, you should perform drive test for network optimization. If there is no problem, it means that you have succeeded in integrating the network.
				11) For the convenience of network maintenance, you should paste labels for the corresponding cells.
				12) Finish connecting the match heads and EAC; install the sensor; and test the EAC connection and function.
				13) Install battery or battery rack.
				14) If the drive test results are normal, it means that the BTS has been successfully integrated.
				15) Package the old equipment if necessary.
				16) Collect the test record and tool; tidy up the engineering field, and return the key.
			II. BTS Swap Steps
				1) Shut down the original BTS
				2) Integrate BTS power supply
				3) Integrate Abis interface relay
				4) Check BTS installation and power-on the BTS
				5) Dial test phone
				6) Integrate antenna feeder system
				7) Check drive test
				8) Analyze the integration
				9) Deal with original BTS
		6.1.6 PCU Integration
			I. Gb Interface Integration Steps and Precautions
				1) Check Gb interface data configuration, including E1 configuration, BC configuration, NC-VC configuration, and cell configuration.
				2) Check hardware connection to make sure that the Gb interface board is inserted at the right position.
				3) Test transmission self loop to make sure that the E1 line is correctly configured for Gb interface.
				4) Check E1 connection. If the green light of the PMC board flashes slowly, the E1 connection is normal.
				5) Check BC state through “mt fr bc show statinfo all”. If the link consistency check is available and the user is not blocked, it means that the BC state is normal.
				6) Check the NSE state through “MT BVC SIG SHOW <NSEI>” to see if it is normal.
				7) Check the NSVC state through “mt nsvc showstate <NSEI><NSVCI>”. If the NSVC is unlocked, it means that it is normal.
				8) Check the Signal BVS state through “mt bvc signal show state <NSEI>” to see if it is normal.
				9) Check the PTP BVC state through “mt bvc ptp show state <NSEI> {<BVCI>|all” to see if it is normal.
			II. Traffic Statistics Indicator Registration (PCU)
		6.1.7 Network Optimization Arrangement
	6.2 Emergency Measures and Changback for Network Integration
		6.2.1 Emergency Measures
			I. Emergency Measures for BSC
			II. Emergency Measures for BTS
		6.2.2 Changeback Principle Description
		6.2.3 Changeback Measures
			I. BSC Changeback
				1) If all the BSC is changed back and shares one MSC with the original BSC, you should do the followings:
				2) If all the BSC is changed back and uses another MSC, you should do the followings:
			II. BTS Changeback
	6.3 Network Monitoring on the Day Next to Swap
Chapter 7 After-Swap Network Quality Monitoring and Optimization
	7.1 Online Equipment Problem Handling
		7.1.1 Hardware Problem Handling
		7.1.2 Complaint Handling
		7.1.3 Alarm Analysis
			I. BSS-Focused Abnormal Alarms
			II. Important MSC-Related Alarms
	7.2 Network Monitoring and Optimization
		7.2.1 OMC Traffic Statistics Analysis
			I. KPI Analysis (Voice Service)
			II. KPI Monitoring (for Each Swap BTS)
			III. KPI Analysis (Packet Service)
		7.2.2 Analysis of NSS-Related Radio Indicators
			I. Paging Success Rate and Location Update Success Rate
			II. Signaling Load
			III. Intra-MSC Handover Success Rate
		7.2.3 Analysis of Area DT and CQT and Related Suggestions
		7.2.4 After-Swap Network Maintenance
		7.2.5 Network Optimization
	7.3 Customer Communication
Chapter 8 Swap Acceptance and Document Transformation
	8.1 Preliminary Acceptance
	8.2 Network Performance Acceptance
	8.3 Document Transformation
Chapter 9 Swap Risk Analysis
	9.1 Network Information Collection and Risk Evaluation
		9.1.1 Risks Caused by Inadequate Understanding of the Performance of the Original Equipment
		9.1.2 Risks Caused by Inaccurate Information
		9.1.3 Case Study
			I. Case 1: Indoor Coverage Configuration Problem
			II. Case 2: Customer Complained that the Coverage Area Became Smaller after Huawei Used BTS3002C to Replace Company N’s Outdoor BTS
			III. Case 3: Repeaters Caused High Call Drop Rate After Swap
			IV. Case 4: Coverage Area Became Smaller Due to Lacking Understanding of the Movable BTS Used in the Original Network
			V. Case 5: Frequent Intermittence Occurred After Company N’s BTS was Replaced by Huawei BTS3006A
			VI. Case 6: Information of the Original Network was Not Fully Collected and Analyzed
			VII. Case 7: The Longtitude and Latitude of the BTS were Not Fully Checked
			VIII. Case 8: The Mark of A-interface Was Not Verified
	9.2 Project Survey, Equipment Installation and Commissioning
		9.2.1 Interconnection Risks
		9.2.2 Problems Related to Interconnection of GBSS and G9
		9.2.3 Risks Concerning BTS Survey
		9.2.4 Quality Risks Caused by Project Installation Team’s Engineering Level
		9.2.5 Version Risk
		9.2.6 Case Study
			I. Case 1: BTS Could Not Run Normally Due to GSM/CDMA Common Transmission
			II. Case 2: BTS Clock Synchronization Problem Cause by GSM/CDMA Common Transmission
			III. Case 3: Inadequate Capacity of Reused Battery Delayed BTS Installation Progess
			IV. Case 4: BTS Integration Date Was Delayed Because of the Transmission Connector Used in the Original Network Mismatched That Used by Huawei
			V. Case 5: BTS Installation Schedule Was Delayed Due to Goods Distribution Problem
			VI. Case 6: CIC Mistake Caused by Confusion of Transmission Labels
			VII. Case 7: Engineering Quality Resulted in Customer Complaints
			VIII. Case 8: M2000 Was Not Installed in Time
			IX. Case 9: BTS Integration Date Was Delayed Because of the Connector of the Jumper to Be Used Was Different from the One Provided by Huawei
	9.3 Network Planning and Optimization Risk
		9.3.1 Risk Related to Network Indicators
		9.3.2 Coverage Risk
		9.3.3 Inadequate Test before Swap
		9.3.4 Frequency Planning Risk
		9.3.5 Risk Related to Traffic Volume
		9.3.6 Case Study
			I. Case 1: BSC Traffic Volume Decreased Sharply After the Swap of Operator A’s BSS System
			II. Case 2: Problems Caused by Imcomplete Parameter Collection
			III. Case 3: Frequency Interference Was Generated Because of the Coverage Area of a BTS Was Enlarged After Swap.
			IV. Case 4: Paging Success Rate Was Low Because of the Configuration Parameters of the Original Network Were Imcompletely Collected
			V. Case 5: Problem Related to CRO Setting
			VI. Case 6: Call Drop Rate Became Higher After Swap
	9.4 BSS Integration and Monitoring Risk
		9.4.1 Risk Relate to BSS Integration Solution
		9.4.2 Risk Related to BTS Pre-integration
		9.4.3 Risk Related to Transmission Commissioning
		9.4.4 Risk Related to BTS Integration
		9.4.5 Emergency Problems Related to BSC Integration
		9.4.6 Handling of Abnormal Conditions during BTS Integration
			I. BTS One-time Integration
			II. Antenna Problem Happened During BTS Swap
			III. Repeater Reutilization Problem
			IV. Indoor Distribution System Problem
			V. VSWR Alarm Handling
			VI. Inverse Connection of Antenna
			VII. Abis Interface Error
		9.4.7 Case Study
			I. Case 1: Monitoring Traffic Statistics After Integration Prevented Problems from Spreading
			II. Case 2: The Speed for the MS to Access the Network Was Slow Due to Clock Problem
	9.5 Acceptance Risks
		9.5.1 Risk Related to Customer Communication
		9.5.2 Risk Related to Acceptance Test before Integration
		9.5.3 Case Study
			I. Case 1: Acceptance Test Could Not be Performed Because the Acceptance Standards Were Not Designed in Detail
			II. Acceptance Progress Was Slow Because the Distance between BTSs Was Large
	9.6 Non-technical Risk Analysis
		9.6.1 Risk Related to Contract Items
		9.6.2 Risk Related to Project Duration Risk
		9.6.3 Management Risk
			1) Cooperation between network planning and project
			2) Subcontractor Management
			3) Customer cooperation
			4) Supervisor management
		9.6.4 Risk Related to Communication
		9.6.5 Risk Related to Contract Implementation
		9.6.6 Risk Related to Work Flow
		9.6.7 Case Study
			I. Case 1: Customer’s Senior Management Team Sent Complaints to Huawei Marketing Department Because Engineers Did Not Report the Problem Handling Result in Time
			II. Case 2: Customer Complained About the Document Problem
			III. Case 3: Important Cooperation Affairs Should be Confirmed by the Customer’s Senior Management Team at the Project Coordination Meeting
			IV. Case 4: Shortage of Project Duration Made the Swap Plan in a Mess.
			V. Case 5: Hastened Progress Caused Secondary Integration
Appendix: Reference Document Catalog and Network Integration Checklist
	9.7 Reference Document Catalog
	9.8 Network Integration Checklist
		9.8.1 BSC Service Test
		9.8.2 GPRS Dialing Test Checklist
		9.8.3 A-interface Dialing Test Checklist
		9.8.4 Abis Interface Dialing Test Checklist
		9.8.5 BTS Radio Channel Dialing Test Checklist
Document Text Contents
Page 2

GSM BSS Swap Guide For internal use only

Revision Record

Data Revision Version Version Description Author

2006-02-22 V1.0 Initial Version Chen Xinting, Yang Jie, Fan Kai, and

Yi Hongwei

2015-11-16 HUAWEI Confidential Page 2 of 112

Page 57

GSM BSS Swap Guide For internal use only

network for


in the original network,

and then use NASTAR or



2. For one-time swap, you

need to make the data for

one set of adjacent cells

only. For batch swap, you

need to make the data for

two sets of adjacent cells

at the edges. In addition,

you should notify the

customer to modify the

adjacent cell data designed

by the original operator.

3. If Huawei sites are

under the control of

multiple BSCs, you should

make the adjacent cell

data accordingly.

4. Pay attention to design

the data for the adjacent

cells outside the BSC

edge. The number of

adjacent cells cannot be

greater than 32. For batch

swap, if you need to make

the data for more than 32

adjacent cells, you are

suggested to reserve the

original cells first, and

then delete the old data

before add new data.

5. After the completion of

the whole swap, you need

to cancel the information

of the redundant adjacent


actual handover to

reduce the planning


2. The handover will

not be greatly affected

after network

integration, so it is good

for network


irrational, you need

to check the data for


the original


The calculation of LAC is based on certain traffic model and paging strategy. Since the traffic

models in cities and countries are different, the capacity of a location area may greatly different

from that of another location area. For details, you can refer to corresponding guides and seek

help from technical support engineers. The following table gives the capacity of a location area.

(If the traffic volume of each subscriber is 0.02Erl at busy hours.)

2015-11-16 HUAWEI Confidential Page 57 of 112

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