2.0MHz Central Frequency Point Separation Between GSM and UMTS Mode.pdf

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SingleRAN

2.0MHz Central Frequency Point

Separation Between GSM and UMTS ModeFeature Parameter Description

Copyright Huawei Technolog ies Co., Ltd. 2010. All righ ts reserved.

No part of this document may be reproduced or transmitted in any form or by any means without priorwritten consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are the property of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respectiveholders.

Notice

The purchased products, services and features are stipulated by the commercial contract made betweenHuawei and the customer. All or partial products, services and features described in this document may

not be within the purchased scope or the usage scope. Unless otherwise agreed by the contract, allstatements, information, and recommendations in this document are provided "AS IS" without warranties,guarantees or representations of any kind, either expressed or implied.

The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute the warranty of any kind, expressed or implied.

Issue Draft A (2010-12-30)Huawei Proprietary and Confidential

Copyright Huawei Technologies Co., Ltd.i


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SingleRAN2.0MHz Central Frequency Point SeparationBetween GSM and UMTS Mode Contents

Issue Draft A (2010-12-30) Huawei Proprietary and ConfidentialCopyright Huawei Technologies Co., Ltd.

ii

Contents

1 Introduction ................................................................................................................................1-11.1 Scope............................................................................................................................................1-11.2 Intended Audience ........................................................................................................................1-11.3 Change History..............................................................................................................................1-1

2 Technical Descrip tion ..............................................................................................................2-13 Engineering Guidelines...........................................................................................................3-1

Typical Application Scenario ............................................................................................................... 3-1Recommended Configurations............................................................................................................3-1Impacts on Network Performance.......................................................................................................3-1

4 Parameters .................................................................................................................................4-15 Counters ......................................................................................................................................5-16 Glossary ......................................................................................................................................6-17 Reference Documents .............................................................................................................7-1


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SingleRAN2.0MHz Central Frequency Point SeparationBetween GSM and UMTS Mode 1 Introduction


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1 Introduction

1.1 Scope

This document describes the 2.0MHz Central Frequency point separation between GSM and UMTSmode feature. It describes the feature MRFD-221703 2.0MHz Central Frequency point separationbetween GSM and UMTS mode(UMTS) and MRFD-211703 2.0MHz Central Frequency point separationbetween GSM and UMTS mode(GSM).

1.2 Intended Audience

This document is intended for:

zPersonnel familiar with basic principles of GSM and WCDMA

zPersonnel who need to understand this feature

zPersonnel who work with Huawei products or systems

1.3 Change History

This section provides the information on the changes in different document versions.

There are two types of changes, which are defined as follows:

zFeature change: refers to changes in the 2.0MHz Central Frequency Point Separation Between GSMand UMTS Mode feature of a specific product version.

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

Document Issues

The document issue is as follows:

zDraft A (2010-12-30)

Draft A (2010-12-30)

This is the draft of the document for SRAN6.0.

This is a new document.


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SingleRAN2.0MHz Central Frequency Point SeparationBetween GSM and UMTS Mode 2 Technical Description

Issue Draft A (2010-12-30) Huawei Proprietary and ConfidentialCopyright Huawei Technologies Co.,

Ltd.

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2 Technical Description

The propagation performance of the 900 MHz or 850 MHz band is better than that of the 2100 MHz bandbut spectrum resources of the 900 MHz or 850 MHz band are much less than those of the 2100 MHz

band. Therefore, there is a conflict between the increasing demand for GSM services and the limitedspectrum resources. Some telecom operators are unable to reserve 5 MHz bandwidth from the 850 MHzor 900 MHz band for UMTS services. However, to maintain their competitiveness, they still want todeploy new UMTS services on the 850 MHz or 900 MHz band. They use a non-standard bandwidth, forexample, 3.8 MHz, for UMTS carriers, and 2.0 MHz frequency spacing between GSM and UMTScarriers. This method may deteriorate network KPIs, but for these operators, the competitive advantagesbrought by non-standard bandwidth and small frequency spacing can make up for the loss of KPIs.

Figure 2-1 shows the application of 3.8 MHz bandwidth for the UMTS network and 2.0 MHz frequencyspacing shared by GSM and UMTS networks.

Figure 2-1 Network application of the feature

With this new feature, the GSM network interferes with the uplink of the UMTS network. To mitigate anyadverse effect of neighboring GSM frequencies on UMTS frequencies, the Huawei NodeB provides a 3.8MHz bandwidth filter.

This feature improves frequency utilization. Instead of providing 5 MHz bandwidth dedicated to UMTSservices, this feature allocates 3.8 MHz bandwidth to UMTS and reserves 1.2 MHz bandwidth for GSM.This helps expand GSM network capacity.


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SingleRAN2.0MHz Central Frequency Point SeparationBetween GSM and UMTS Mode 3 Engineering Guidelines


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3 Engineering Guidelines

Typical Application Scenario

This feature is applicable to low-traffic rural areas where a frequency band of 6 MHz to 8 MHz isrecommended and the GSM and UMTS networks are deployed by the same operator using Huaweiequipment.

Recommended Configurations

After this feature is activated, it is recommended that in a GSM network small-spaced frequencies beused for non-BCCH carriers, and PDCHs and SDCCHs be configured on non-interfered frequencies.

This feature depends on the following features:

zDiscontinuous Transmission (DTX)-Downlink

zHUAWEI III Power Control Algorithm

zActive Power Control

To improve HSUPA user experience, it is recommended that Anti-Interference Scheduling for HSUPA beenabled.

Impacts on Network Performance

This feature decreases the frequency spacing between GSM and UMTS carriers to 2.0 MHz, andtherefore it may impose the following impacts on network performance:

zThe throughput of UMTS HSPA services decreases because the GSM and UMTS networks interferewith each other and the UMTS network uses a 3.8 MHz bandwidth filter.

z

The throughput of GSM EDGE services decrease because UMTS interferes with GSM.zThe mean opinion scores (MOSs) of GSM and UMTS decrease.

zKPIs of the GSM network may deteriorate because 3.8 MHz GSM bandwidth is allocated to UMTS.

zThis feature is not applicable to HSPA+ services.


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SingleRAN2.0MHz Central Frequency Point SeparationBetween GSM and UMTS Mode 4 Parameters


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4 Parameters

Table 4-1 Parameter description

Parameter ID NE MML DescriptionFMBWH NodeB SET FREQBWH Meaning: Indicates the minimum effective bandwidth of

the carrier.

GUI Value Range: 5000, 4800, 4600, 4400, 4200, 3800Actual Value Range: 5000, 4800, 4600, 4400,4200, 3800Unit: kHzDefault Value: 5000


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SingleRAN2.0MHz Central Frequency Point SeparationBetween GSM and UMTS Mode 5 Counters


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5 Counters

There are no counters related to this feature.


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SingleRAN2.0MHz Central Frequency Point SeparationBetween GSM and UMTS Mode 6 Glossary


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6 Glossary

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


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SingleRAN2.0MHz Central Frequency Point SeparationBetween GSM and UMTS Mode 7 Reference Documents


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7 Reference Documents

[1] BSC6900 GU Parameter Reference

[2] BSC6900 GU MML Command Reference

2.0MHz Central Frequency Point Separation Between GSM and UMTS Mode.pdf

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