2G 3G Neighboring Cell Automatic Optimization(GBSS16.0_01).pdf

GSM BSS GBSS16.0

2G/3G Neighboring Cell Automatic Optimization Feature Parameter Description Issue

01

Date

2014-04-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2016. 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.

Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks trademarks and trade names mentioned mentioned in this this document are are the property of of their respective holders.

Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd. Address:

Huawei Industrial Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China

Website:

http://www.huawei.com

Email:

[email protected]

Issue 01 (2014-04-30)

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

i

GSM BSS 2G/3G Neighboring Cell Automatic Optimization Feature Parameter Description

Contents

Contents 1 About This Document.................................................................................................................. 1 1.1 Scope.............................................................................................................................................................................. 1 1.2 Intended Audience.......................................................................................................................................................... 1 1.3 Change History............................................................................................................................................................... 1

2 Overview......................................................................................................................................... 3 2.1 Introduction.................................................................................................................................................................... 3 2.2 NEs Supporting the Feature............................................................................................................................................4

3 Technical Description...................................................................................................................5 3.1 Network Topology.......................................................................................................................................................... 5 3.2 Task Creation.................................................................................................................................................................. 5 3.3 Neighboring Cell Analysis Algorithm............................................................................................................................6

4 Parameters.......................................................................................................................................8 5 Counters.......................................................................................................................................... 9 6 Glossary.........................................................................................................................................21 7 Reference Documents................................................................................................................. 22

Issue 01 (2014-04-30)


ii


1 About This Document

1

About This Document

1.1 Scope This document describes the GBFD-510901 2G/3G Neighboring Cell Automatic Optimization feature, including its technical description and benefits.

1.2 Intended Audience This document is intended for personnel who: l l

Need to understand the features described herein Work with Huawei products

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

Feature change Changes in features of a specific product version

l

Editorial change Changes in wording or addition of information that was not described in the earlier version

01 (2014-04-30) This issue does not include any changes.

Draft A (2014-01-23) Compared with Issue 01(2013-05-06) of GBSS15.0, Draft A (2014-01-23) of GBSS16.0 includes the following changes.

Issue 01 (2014-04-30)


1


1 About This Document

Change Type

Change Description

Parameter Change

Feature change

Optimized the algorithm for Added the polling and measuring FILTERFREQSSW BCCH frequencies. For parameter. details, see 3.3 Neighboring Cell Analysis Algorithm. Added the counters related to the 2G/3G Neighboring Cell Automatic Optimization feature. For details, see 5 Counters . Changed the name of Huawei mobile element management system from M2000 to U2000.

Editorial change

Issue 01 (2014-04-30)

None


None

2


2 Overview

2

Overview

2.1 Introduction To support roaming and handovers between GSM and UMTS, a GSM network must be compatible with a UMTS network. In this case, operators need to provide continuous and high-quality services in the boundary of different systems to avoid call drops caused by t he movement of MSs. Traditionally, inter-RAT neighboring cells are configured based on drive tests and analysis. This process is time-consuming and labor-intensive, and the test results are not comprehensive enough due to the limitations of drive tests. To improve efficiency and accuracy of neighboring cell configuration between radio access technologies (RATs), a tool is required to automatically check the inter-RAT neighboring cell configuration based on data analysis. Together with the Nastar network optimization tool, Huawei GSM base station system (GBSS) can analyze the neighboring 2G/3G cell configuration based on numerous measurement reports (MRs) from MSs, show the analysis results on a map, and identify missing or redundant neighboring 2G/3G cells for a GSM serving cell. Configuring appropriate neighboring 2G/3G cells based on the Nastar analysis results helps improve the intra-RAT and inter-RAT handover success rates and reduce the call drop rate and enhance GSM network quality and user experience. This document describes the 2G/3G Neighboring Cell Automatic Optimization feature from the following aspects: l l l

Issue 01 (2014-04-30)

Network topology Task creation Neighboring cell analysis algorithm.


3


2 Overview

2.2 NEs Supporting the Feature Table 2-1 NEs supporting the feature

Feature Name 2G/3G Neighboring Cell Automatic Optimization

BSC6900

BSC6910

GBTS

eGBTS

√

√

√

√

NOTE √ indicates

Issue 01 (2014-04-30)

that the NE supports this feature. × indicates that the NE does not support this feature.


4


3 Technical Description

3

Technical Description

3.1 Network Topology This feature must be supported by the BSC, U2000, Nastar, and MSs. To implement the 2G/3G neighboring cell automatic optimization, create a 2G/3G neighboring cell automatic optimization task on the Nastar. Figure 3-1 shows the network topology for this feature. Figure 3-1 Network topology

3.2 Task Creation The procedure for creating a 2G/3G neighboring cell automatic optimization task is as follows: 1.

Issue 01 (2014-04-30)

Create an end-to-end task on the Nastar and set the following basic information: task name, OSS name, NE name, NE type, measurement start time, measurement end time, measurement period, and BCCH frequencies of neighboring 2G cells to be measured or frequencies and scrambling codes of neighboring 3G cells to be measured.


5



NOTE

During a neighboring cell automatic optimization task in the 2G mode or between the 2G and 3G modes, if STEP is not configured, the BSC calculates the measurement step based on the number of frequencies in the BA2 list for each cell. To query the calculated measurement step for a cell, run the DSP NCS or DSP N3GCS command. Some BCCH frequencies will not be measured in each subsequent measurement period if both of the following conditions are met: l

The 2G cell is not configured with neighboring 3G or LTE cells when a neighboring cell automatic optimization task in the 2G mode is started.

l

Users configure neighboring 3G or LTE cells for the 2G cell during the implementation of this task.

The 2G/3G Neighboring Cell Automatic Optimization feature does not support the preceding scenario.

2.

The Nastar sends the task information to the U2000. The U2000 then sends the task information to the BSC by using an MML command. After receiving this command, the BSC performs the measurement and generates results.

3.

The BSC updates the BA2 table once in a measurement period. The BSC adds UMTS cells (frequencies and scrambling codes) into the BA2 table (the number of newly-added cells is the same as the measurement step), and then sends the updated BA2 table to MSs by using the system information (SI). Then, MSs report the level of 3G neighboring cells in MRs.

4.

The BSC collects MRs from MSs, and sends the data to the U2000.

5.

The Nastar obtains the measurement files, configuration data, and counter values from the U2000, and then provides the optimization suggestions after analysis.

6.

The neighboring 2G/3G cell analysis results are displayed in a map. Together with engineering parameters, the analysis results help network optimization engineers identify missing and redundant neighboring 2G/3G cells.

3.3 Neighboring Cell Analysis Algorithm Neighboring cell analysis algorithms are used for determining missing or redundant cells. Using the neighboring cell automatic optimization algorithm in the 2G mode, the BSC scores cells that are configured or not configured as neighboring cells based on the absolute level of neighboring cells, the level difference between serving cells and neighboring cells, and MRs. The BSC then sorts the cell scores in descending order. The higher the cell score, the higher the cell priority. The BSC determines whether a cell is a missing or redundant neighboring cell based on the cell priority. Using the neighboring cell automatic optimization algorithm between the 2G and 3G modes, the BSC scores cells that are configured or not configured as neighboring cells based on the level of neighboring cells or the number of MRs with the greatest Ec/No. The BSC then sorts the cell scores in descending order. The higher the cell score, the higher the cell priority. The BSC determines whether a cell is a missing or redundant neighboring cell based on the cell priority. Sorting neighboring cells requires the levels of these neighboring cells. The level of a cell that is not configured as a neighboring cell can be obtained only by polling and measuring BCCH frequencies of neighboring 2G cells or frequencies and scrambling codes of neighboring 3G cells because MRs contain only levels of cells that are configured as neighboring cells. The BSC selects a certain number of BCCH frequencies (or combinations of frequencies and scrambling codes) from the list of BCCH frequencies (or combinations of frequencies and Issue 01 (2014-04-30)


6



scrambling codes) to be measured. The number of selected BCCH frequencies (or combinations of frequencies and scrambling codes) is specified by the measurement step. BCCH frequencies in the BA2 list are constantly measured During a neighboring cell automatic optimization task in the 2G mode, if a selected BCCH frequency is available in the BA2 list, repeated BCCH frequency measurements will decrease the efficiency in BCCH frequency polling and measurement. When FILTERFREQSSW is set to ON(On), the BSC deletes the BCCH frequencies that are available in the BA2 list from the list of BCCH frequencies to be measured and then selects the specified number of BCCH frequencies to be polled and measured. This increases the efficiency in BCCH frequency polling and measurement. The algorithms for determining missing or redundant cells based on the priority are as follows: l

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

l

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

Issue 01 (2014-04-30)


7


4 Parameters

4

Parameters

There are no specific parameters associated with t his feature.

Issue 01 (2014-04-30)


8


5 Counters

5

Counters

Table 5-1 Counters

Counter ID

Counter Name

Counter Description

NE

Feature ID

Feature Name

1282436781

CHAN.OCCUP Y.NUM.SCELL .FDD.BA2.FRE Q.IN.MEASUR E

S396:Number of Occupied Channels During Frequency and Scrambling Code Measurement

BSC6900

GBFD-510901

2G/3G Neighboring Cell Automatic Optimization

1282436781

CHAN.OCCUP Y.NUM.SCELL .FDD.BA2.FRE Q.IN.MEASUR E

S396:Number of Occupied Channels During Frequency and Scrambling Code Measurement

BSC6910

GBFD-510901


1282436780

CHAN.OCCUP Y.NUM.SCELL . 2G.BA2.IN.ME ASURE

S395:Number of Occupied Channels During BCCH Frequency Measurement

BSC6900

GBFD-510901


1282436780

CHAN.OCCUP Y.NUM.SCELL . 2G.BA2.IN.ME ASURE

S395:Number of Occupied Channels During BCCH Frequency Measurement

BSC6910

GBFD-510901


Issue 01 (2014-04-30)


9


5 Counters

Counter ID

Counter Name

Counter Description

NE

Feature ID

Feature Name

1282432826

CELL.UCELL.I NTERRAN.OU TCELL.HO.RE Q

ST512:Number of GSMWCDMA Outgoing InterRAT Inter-Cell Handover Requests

BSC6900

GBFD-510901


1282432827

CELL.UCELL.I NTERRAN.OU TCELL.HO.FAI L

ST513:Number of Failed GSMWCDMA Outgoing InterRAT Inter-Cell Handovers

BSC6900

GBFD-510901


1282432826

CELL.UCELL.I NTERRAN.OU TCELL.HO.RE Q

ST512:Number of GSMWCDMA Outgoing InterRAT Inter-Cell Handover Requests

BSC6910

GBFD-510901


1282432827

CELL.UCELL.I NTERRAN.OU TCELL.HO.FAI L

ST513:Number of Failed GSMWCDMA Outgoing InterRAT Inter-Cell Handovers

BSC6910

GBFD-510901


1278272417

CELL.NCELL. LEV

S360:Strength of Signals in Neighbor Cells

BSC6900

GBFD-510901


1278272418

CELL.NCELL. MR.NUM

S361:MRs of Neighbor Cells

BSC6900

GBFD-510901


1278272419

CELL.NCELL. LEV.AVR

AS360:Mean Strength of Signals in Neighbor Cells

BSC6900

GBFD-510901


1278272420

CELL.SCELL. LEV

S362:Strength of Signals in Serving Cells

BSC6900

GBFD-510901


Issue 01 (2014-04-30)


10


5 Counters

Counter ID

Counter Name

Counter Description

NE

Feature ID

Feature Name

1278272421

CELL.SCELL. NCELL.LEV.L ESS.THRES1. MR.NUM

S363:Number of MRs in Which the Signal Strength Difference Between the Serving Cell and the Neighbor Cell Is Smaller Than the Neighbor Cell Interference Level Threshold 1

BSC6900

GBFD-510901


1278272422

CELL.SCELL. NCELL.LEV.G T.THRES1.MR. NUM

S364:Number of MRs in Which the Signal Strength Difference Between the Serving Cell and the Neighbor Cell Is Greater Than the Neighbor Cell Interference Level Threshold 1

BSC6900

GBFD-510901


1278272423



BSC6900

GBFD-510901


Issue 01 (2014-04-30)


11


5 Counters

Counter ID

Counter Name

Counter Description

NE

Feature ID

Feature Name

1278272424



BSC6900

GBFD-510901


1278272425



BSC6900

GBFD-510901


1278272426



BSC6900

GBFD-510901


Issue 01 (2014-04-30)


12


5 Counters

Counter ID

Counter Name

Counter Description

NE

Feature ID

Feature Name

1278272427



BSC6900

GBFD-510901


1278272428



BSC6900

GBFD-510901


1278272429

CELL.SCELL. NCELL.DIFF.L EV.AVR

AS362:Mean Signal Strength Difference Between Serving Cell and Neighbor Cell

BSC6900

GBFD-510901


1278272430

CELL.NCELL. SCELL.LEV.G T.RTHRES.MR. NUM

S371:Measurem ent Reports with Signal Strength Difference Between Neighbor Cell and Serving Cell Greater Than Relative Level Threshold

BSC6900

GBFD-510901


Issue 01 (2014-04-30)


13


5 Counters

Counter ID

Counter Name

Counter Description

NE

Feature ID

Feature Name

1278272431

CELL.NCELL. LEV.GT.ABS.T HRES.MR.NU M

S372:Measurem ent Reports with Signal Strength of Neighbor Cell Greater Than Absolute Level Threshold

BSC6900

GBFD-510901


1278272445

CELL.NCELL. LEVEL.0

S386:Number of MRs on Competitive Cell (Receive Level Rank 0)

BSC6900

GBFD-510901


1278272446

CELL.NCELL. LEVEL.1


BSC6900

GBFD-510901


1278272447

CELL.NCELL. LEVEL.2


BSC6900

GBFD-510901


1278272448

CELL.NCELL. LEVEL.3


BSC6900

GBFD-510901


1278272449

CELL.NCELL. LEVEL.4


BSC6900

GBFD-510901


1278272450

CELL.NCELL. LEVEL.5


BSC6900

GBFD-510901


1278272451

CELL.NCELL. LEVEL.6


BSC6900

GBFD-510901


Issue 01 (2014-04-30)


14


5 Counters

Counter ID

Counter Name

Counter Description

NE

Feature ID

Feature Name

1278272452

CELL.NCELL. LEVEL.7


BSC6900

GBFD-510901


1278272453



BSC6900

GBFD-510901


1278272417

CELL.NCELL. LEV

S360:Strength of Signals in Neighbor Cells

BSC6910

GBFD-510901


1278272418

CELL.NCELL. MR.NUM

S361:MRs of Neighbor Cells

BSC6910

GBFD-510901


1278272419

CELL.NCELL. LEV.AVR

AS360:Mean Strength of Signals in Neighbor Cells

BSC6910

GBFD-510901


1278272420

CELL.SCELL. LEV

S362:Strength of Signals in Serving Cells

BSC6910

GBFD-510901


Issue 01 (2014-04-30)


15


5 Counters

Counter ID

Counter Name

Counter Description

NE

Feature ID

Feature Name

1278272421



BSC6910

GBFD-510901


1278272422



BSC6910

GBFD-510901


1278272423



BSC6910

GBFD-510901


Issue 01 (2014-04-30)


16


5 Counters

Counter ID

Counter Name

Counter Description

NE

Feature ID

Feature Name

1278272424



BSC6910

GBFD-510901


1278272425



BSC6910

GBFD-510901


1278272426



BSC6910

GBFD-510901


Issue 01 (2014-04-30)


17


5 Counters

Counter ID

Counter Name

Counter Description

NE

Feature ID

Feature Name

1278272427



BSC6910

GBFD-510901


1278272428



BSC6910

GBFD-510901


1278272429

CELL.SCELL. NCELL.DIFF.L EV.AVR

AS362:Mean Signal Strength Difference Between Serving Cell and Neighbor Cell

BSC6910

GBFD-510901


1278272430

CELL.NCELL. SCELL.LEV.G T.RTHRES.MR. NUM

S371:Measurem ent Reports with Signal Strength Difference Between Neighbor Cell and Serving Cell Greater Than Relative Level Threshold

BSC6910

GBFD-510901


Issue 01 (2014-04-30)


18


5 Counters

Counter ID

Counter Name

Counter Description

NE

Feature ID

Feature Name

1278272431

CELL.NCELL. LEV.GT.ABS.T HRES.MR.NU M

S372:Measurem ent Reports with Signal Strength of Neighbor Cell Greater Than Absolute Level Threshold

BSC6910

GBFD-510901


1278272445

CELL.NCELL. LEVEL.0


BSC6910

GBFD-510901


1278272446

CELL.NCELL. LEVEL.1


BSC6910

GBFD-510901


1278272447

CELL.NCELL. LEVEL.2


BSC6910

GBFD-510901


1278272448

CELL.NCELL. LEVEL.3


BSC6910

GBFD-510901


1278272449

CELL.NCELL. LEVEL.4


BSC6910

GBFD-510901


1278272450

CELL.NCELL. LEVEL.5


BSC6910

GBFD-510901


1278272451

CELL.NCELL. LEVEL.6


BSC6910

GBFD-510901


Issue 01 (2014-04-30)


19


5 Counters

Counter ID

Counter Name

Counter Description

NE

Feature ID

Feature Name

1278272452

CELL.NCELL. LEVEL.7


BSC6910

GBFD-510901


1278272453



BSC6910

GBFD-510901


Issue 01 (2014-04-30)


20


6 Glossary

6

Glossary

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

Issue 01 (2014-04-30)


21


7 Reference Documents

7

Reference Documents

None

Issue 01 (2014-04-30)


22

2G 3G Neighboring Cell Automatic Optimization(GBSS16.0_01).pdf

Recommend Documents