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HUAWEI TECHNOLOGIES CO., LTD.

www.huawei.com

Huawei Confidential

Security Level:

Prepared by: Zeng Shujing

Reviewed by: Qi Haofeng

GSM Neighboring Cell Optimization:

Principles, Tools, and Deliverables

July 30, 2010

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Abstract

This slide describes the principles and tools of GSM

neighboring cell optimization. Neighboring cell optimization is

intended to avoid missing and redundant neighboring cells,

which improves the GSM network performance.

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HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

R&D SupportHuawei provides training in and around-the-clock technical support for

neighboring cell optimization.

R&D support personnel

Name Employee ID Phone

Cui Xiaoyi 51635 See the phone book.

Zeng Shujing 134972 See the phone book.

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HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 4

Neighboring Cell Optimization Schemes

Neighboring cell optimization should be conducted throughout

frequency replanning. The detailed schemes are as follows:

Disable redundant neighboring cells to save the space in the BA2 table

and improve the measurement efficiency of Cellopt.

Add missing neighboring cells to improve the handover success rate

and reduce the call drop rate.

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HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 5

Neighboring Cell Optimization Schemes:

Principles and ToolsNeighboring Cell Optimization Schemes

Missing Neighboring Cell Optimization

Redundant

Neighboring Cell

Optimization

A new Nastar platform is

deployed onsite.

Requirement Scheme Advantage and Disadvantage

1. NastarV600R002 and later

versions

2. BSC6000 V900R008C01 and later

versions

3. M2000 V200R008C01SPC010 and

later versions

The new Nastar platform

automatically outputs

suggestions on neighboring cell

optimization according to MR

data.

Advantage: Based on the actual traffic interference situation of the

existing network, the output suggestions is accurate and reliable.

Disadvantage: The NE mapping version is restricted.

Disable redundant

neighboring cells

through measurement

of outgoing/incoming

cell handovers of

.No new Nastar

platform is

deployed onsite.

Early stage of

frequency

replanning

Old Nastar platform

1. Manually check all cells to

determine whether missing

neighboring cells exist;

2. Output suggestions on

neighboring cell planning

according to location relation todetect missing neighboring cells.

Advantage: An old Nastar platform is stand-alone and thus is easy

to install. The software is available at http://support.huawei.com and

can be used with a license applied for from Liu Fengzhen

(employee ID: 00126279).

Disadvantage: Only longitudes and latitudes are considered.

Therefore, the old Nastar platform is not as accurate and reliable asthe new one.

U_Net license

Conduct emulation prediction

according to input RF

parameters, antenna heights,

azimuths, and tilts, and plan

neighbor relation of each cell. In

this way, missing neighboring

cells are detected.

Advantage: Suggestions on neighboring cell planning can be

conveniently output through emulation.

Disadvantages: 1. It is hard to obtain the license of the U_Net

onsite because the license must be purchased.

2. It is hard to control the planning results that rely on the accuracy

of engineering parameters.

Drive test tool

Determine whether missing

neighboring cells exist according

to abnormal events during DT

tests.

Advantage: Missing neighboring cells can be accurately and

reliably detected according to call situations.

Disadvantage: Only routing situations can be indicated.

1. Cellopt license

2. BSC6000 V900R008C01 and later

versionsThe Cellopt automatically

outputs suggestions on

neighboring cell optimization

according to MR data.

Advantage: Based on the actual traffic interference situation of theexisting network, the output suggestions are accurate and reliable.

Disadvantage: 1. As software for frequency replanning, the Cellopt

is used only at sites where frequency replanning is conducted

because its license is expensive.

2. MR data needs to be transmitted to the frequency replanning

center onsite. The center then outputs optimization suggestions.

Large amount of MR data leads to interworking troubles.

Late stage of

frequency

replanning

1. Cellopt license

2. BSC6000 V900R008C01 and later

versions

Advantage: The frequency replanning center outputs suggestions

on neighboring cell optimization and frequency schemes at the

same time to reduce onsite workload.

http://support.huawei.com/http://support.huawei.com/

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Thank youwww.huawei.com