2G3G Neighboring Cell Automatic Optimization(GBSS13.0_01)

2G/3G Neighboring Cell Automatic Optimization GBSS13.0

Feature Parameter Description

Issue

01

Date

2011-03-31

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2012. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

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Website:

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Email:

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GSM BSS 2G/3G Neighboring Cell Automatic Optimization

Contents

Contents 1 Introduction ................................................................................................................................1-1 1.1 Scope ............................................................................................................................................ 1-1 1.2 Intended Audience......................................................................................................................... 1-1 1.3 Change History.............................................................................................................................. 1-1

2 Overview......................................................................................................................................2-1 3 Technical Description ..............................................................................................................3-1 3.1 Network Topology .......................................................................................................................... 3-1 3.2 Task Creation ................................................................................................................................ 3-1 3.3 Neighboring Cell Analyzing Algorithm ........................................................................................... 3-1

4 Parameters..................................................................................................................................4-1 5 Counters ......................................................................................................................................5-1 6 Glossary ......................................................................................................................................6-1 7 Reference Documents .............................................................................................................7-1

Issue 01 (2011-03-31)

Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

i


1 Introduction

1 Introduction 1.1 Scope This document describes the benefits of the 2G/3G Neighboring Cell Automatic Optimization feature and the principle of implementing this feature in Huawei GSM BSS. The feature involved is GBFD-510901 2G/3G Neighboring Cell Automatic Optimization.

1.2 Intended Audience This document is intended for: 

Personnel who need to understand the 2G/3G Neighboring Cell Automatic Optimization feature.



Personnel who work with Huawei products

1.3 Change History This section provides information on the changes in different document versions. There are two types of changes, which are defined as follows: 

Feature change: refers to the change in the 2G/3G Neighboring Cell Automatic Optimization feature of a specific product version.



Editorial change: refers to the change in wording or the addition of the information that was not described in the earlier version.

Document Issues The document issues are as follows: 

01 (2011-03-31)



Draft A (2011-01-15)

01 (2011-03-31) This is the first release of GBSS13.0. Compared with issue draft A (2011-01-15) of GBSS13.0, issue 01 (2011-03-31) of GBSS13.0 has no change.

Draft A (2011-01-15) This is the draft release of GBSS13.0. Compared with issue 01 (2010-06-30) of GBSS12.0, issue Draft A (2011-01-15) of GBSS13.0 has no change.

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2 Overview

2 Overview The 2G network must be compatible with the 3G network to support the roaming and handover between GSM and UMTS. Operators need to provide continuous and high-quality services in the boundary of different systems to avoid call drops of moving MSs. In traditional conditions, inter-RAT neighboring cells are configured on the basis of drive tests and analysis, which is time-consuming and labor-consuming, and the test result is incomprehensive owning to the limitations of drive tests. A tool is required to check the inter-RAT neighboring cell configuration automatically based on the data analysis to improve the efficiency and accuracy. Together with the Nastar network optimization tool, Huawei GSM BSS can analyze the 2G/3G neighboring cell configuration based on numerous measurement reports (MRs) from MSs, show the analysis result on the map, and find out missing or redundant 3G neighboring cells for the GSM serving cell. Configuring appropriate 3G neighboring cells according to the Nastar analyzing result helps to improve the inter-RAT handover success rate and reduce the call drop rate, thus improving the GSM network quality and the user experience. This document introduces the 2G/3G Neighboring Cell Automatic Optimization feature from the following aspects: 

Network topology



Task creation



Neighboring cell analyzing algorithm.

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3 Technical Description

3 Technical Description 3.1 Network Topology This feature should be supported by the MS, BSC, M2000, and Nastar. To implement this feature, create a corresponding task on the Nastar. Figure 3-1shows the network topology of this feature. Figure 3-1 Network topology of 2G/3G neighboring cell automatic optimization

Nastar

RNC NodeB MS

iManager M2000

BTS

BSC

3.2 Task Creation The procedure for creating a 2G/3G neighboring cell automatic optimization task is as follows: 1. Create an end-to-end task on the Nastar and set the following basic information: task name, OSS name, NE name, NE type, start time for the measurement, end time for the measurement, MEASPERIOD, and scrambling code of the 3G neighboring cell to be measured, and NcellInterFLevelThres0 to NcellInterFLevelThres7. 2. The Nastar sends the task to the M2000, the M2000 then sends the task information to the BSC through a MML command. After receiving the command, the BSC performs the measurement and generate a result. 3. The BSC updates the BA2 one time in each measurement period. The BSC adds UMTS cells (frequency + scrambling code) into the BA2 (the number of newly-added cells is the same as the measurement step), and then sends the updated BA2 to MSs through System Information (SI). Then, MSs report the level of 3G neighboring cells through MRs. 4. The BSC collects MRs from MSs, and then sends the data to the M2000. 5. The Nastar obtains the measurement files, configuration data, and counter values from the M2000, and then provides the optimization suggestion after analysis. 6. The 2G/3G neighboring cell analysis results are shown in the map directly. Together with the engineering parameters, the analysis result helps the network optimization engineers figuring out the missing and abundant 2G/3G neighboring cells.

3.3 Neighboring Cell Analyzing Algorithm Neighboring cell analyzing algorithm is used for determining missing or abundant cells.

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3 Technical Description

The algorithm grades and sorts 3G neighboring cells on the basis of the absolute level, relative level, and number of MRs of the 2G serving cell and 3G neighboring cells. A greater score indicates a higher priority. Then, the algorithm determines the missing or redundant cells according to the priority. 

The algorithm for determining the missing cell is as follows: If a cell is not configured as the neighboring cell but the priority of the cell is greater than the advised number of neighboring cells, the cell is considered as the missing neighboring cell.



The algorithm for determining the redundant cell is as follows: If a cell is configured as the neighboring cell but the priority of the cell is smaller than the advised number of neighboring cells, the cell is considered as the redundant neighboring cell.

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4 Parameters

4 Parameters Table 4-1 Parameter description Parameter ID

NE

MEASPERIOD BSC6900

MML Command

Feature ID

Feature Name

ADD GBFD-511103 GSM and GNRNC(Mandatory) GBFD-511402 WCDMA Load Balancing Based MOD on Iur-g GNRNC(Mandatory)

Description Meaning: Common measurement period

Radio Resource GUI Value Reserved Range: 1~5 Handover Actual Value Between Range: 1~5 GSM/TD-SCDMA Default Value: 3 Based on Iur-g Unit: s NcellInterFLevel BSC6900 Thres0

SET GBFD-510901 GSM and UMTS OTHSOFTPARA(Op Neighboring Cell tional) Automatic Optimization

Meaning: Neighboring cell interference level threshold 0. The actual value of this parameter is equal to the GUI value minus 64. GUI Value Range: 0~127 Actual Value Range: -64~63 Default Value: 0 Unit: dB

NcellInterFLevel BSC6900 Thres7

SET GBFD-510901 GSM and UMTS OTHSOFTPARA(Op Neighboring Cell tional) Automatic Optimization

Meaning: Neighboring cell interference level threshold 7. The actual value of this parameter is equal to the GUI value minus 64. GUI Value Range: 0~127 Actual Value Range: -64~63 Default Value: 80 Unit: dB

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5 Counters

5 Counters Table 5-1 Counter description Counter ID Counter Name

Counter Description

Feature ID

Feature Name

1278272417 CELL.NCELL.LEV

S360:Strength of Signals in GBFD-510901 2G/3G Neighboring Cell Neighbor Cells Automatic Optimization

1278272418 CELL.NCELL.MR.N S361:MRs of Neighbor Cells GBFD-510901 2G/3G Neighboring Cell UM Automatic Optimization 1278272419 CELL.NCELL.LEV.A AS360:Mean Strength of VR Signals in Neighbor Cells 1278272420 CELL.SCELL.LEV

GBFD-510901 2G/3G Neighboring Cell Automatic Optimization

S362:Strength of Signals in GBFD-510901 2G/3G Neighboring Cell Serving Cells Automatic Optimization

1278272421 CELL.SCELL.NCEL S363:Number of MRs in GBFD-510901 2G/3G Neighboring Cell L.LEV.LESS.THRES Which the Signal Strength Automatic Optimization 1.MR.NUM Difference Between the Serving Cell and the Neighbor Cell Is Smaller Than the Neighbor Cell Interference Level Threshold 1 1278272422 CELL.SCELL.NCEL S364:Number of MRs in GBFD-510901 2G/3G Neighboring Cell L.LEV.GT.THRES1. Which the Signal Strength Automatic Optimization MR.NUM Difference Between the Serving Cell and the Neighbor Cell Is Greater Than the Neighbor Cell Interference Level Threshold 1 1278272423 CELL.SCELL.NCEL S365:Number of MRs in GBFD-510901 2G/3G Neighboring Cell L.LEV.GT.THRES2. Which the Signal Strength Automatic Optimization MR.NUM Difference Between the Serving Cell and the Neighbor Cell Is Greater Than the Neighbor Cell Interference Level Threshold 2 1278272424 CELL.SCELL.NCEL S366:Number of MRs in GBFD-510901 2G/3G Neighboring Cell L.LEV.GT.THRES3. Which the Signal Strength Automatic Optimization MR.NUM Difference Between the Serving Cell and the Neighbor Cell Is Greater Than the Neighbor Cell Interference Level Threshold 3 1278272425 CELL.SCELL.NCEL S367:Number of MRs in L.LEV.GT.THRES4. Which the Signal Strength Issue 01 (2011-03-31)



5-1


Counter ID Counter Name MR.NUM

Counter Description

5 Counters

Feature ID

Feature Name

Difference Between the Serving Cell and the Neighbor Cell Is Greater Than the Neighbor Cell Interference Level Threshold 4

1278272426 CELL.SCELL.NCEL S368:Number of MRs in GBFD-510901 2G/3G Neighboring Cell L.LEV.GT.THRES5. Which the Signal Strength Automatic Optimization MR.NUM Difference Between the Serving Cell and the Neighbor Cell Is Greater Than the Neighbor Cell Interference Level Threshold 5 1278272427 CELL.SCELL.NCEL S369:Number of MRs in GBFD-510901 2G/3G Neighboring Cell L.LEV.GT.THRES6. Which the Signal Strength Automatic Optimization MR.NUM Difference Between the Serving Cell and the Neighbor Cell Is Greater Than the Neighbor Cell Interference Level Threshold 6 1278272428 CELL.SCELL.NCEL S370:Number of MRs in GBFD-510901 2G/3G Neighboring Cell L.LEV.GT.THRES7. Which the Signal Strength Automatic Optimization MR.NUM Difference Between the Serving Cell and the Neighbor Cell Is Greater Than the Neighbor Cell Interference Level Threshold 7 1278272429 CELL.SCELL.NCEL AS362:Mean Signal GBFD-510901 2G/3G Neighboring Cell L.DIFF.LEV.AVR Strength Difference Between Automatic Optimization Serving Cell and Neighbor Cell 1278272430 CELL.NCELL.SCEL S371:Measurement Reports GBFD-510901 2G/3G Neighboring Cell L.LEV.GT.RTHRES. with Signal Strength Automatic Optimization MR.NUM Difference Between Neighbor Cell and Serving Cell Greater Than Relative Level Threshold 1278272431 CELL.NCELL.LEV.G S372:Measurement Reports GBFD-510901 2G/3G Neighboring Cell T.ABS.THRES.MR. with Signal Strength of Automatic Optimization NUM Neighbor Cell Greater Than Absolute Level Threshold 1278272445 CELL.NCELL.LEVE S386:Number of MRs on L.0 Competitive Cell (Receive Level Rank 0) Issue 01 (2011-03-31)



5-2


Counter ID Counter Name

Counter Description

5 Counters

Feature ID

Feature Name

1278272446 CELL.NCELL.LEVE S387:Number of MRs on L.1 Competitive Cell (Receive Level Rank 1)














1278272453 CELL.SCELL.NCEL S394:Number of MRs in GBFD-510901 2G/3G Neighboring Cell L.LEV.LESS.THRES Which the Signal Strength Automatic Optimization 0.MR.NUM Difference Between the Serving Cell and the Neighbor Cell Is Smaller Than the Neighbor Cell Interference Level Threshold 0

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6 Glossary

6 Glossary For the acronyms, abbreviations, terms, and definitions, see the Glossary.

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7 Reference Documents

7 Reference Documents [1] BSC6900 Feature List [2] BSC6900 Basic Feature Description [3] BSC6900 GSM Parameter Reference [4] BSC6900 GSM MML Command Reference

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2G3G Neighboring Cell Automatic Optimization(GBSS13.0_01)

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