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

SingleRAN

2.0MHz Central Frequency Point Separation Between GSM and UMTS Mode Feature Parameter Description

Copyright © Huawei Technologies Co., Ltd. 2010. 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 the property of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice The purchased products, services and features are stipulated by the commercial contract made between Huawei 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, all statements, 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 the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations 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

SingleRAN 2.0MHz Central Frequency Point Separation Between GSM and UMTS Mode

Contents

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

2 Technical Description ..............................................................................................................2-1 3 Engineering Guidelines...........................................................................................................3-1 Typical Application Scenario ............................................................................................................... 3-1 Recommended Configurations............................................................................................................ 3-1 Impacts on Network Performance ....................................................................................................... 3-1

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



ii


1 Introduction

1 Introduction 1.1 Scope This document describes the 2.0MHz Central Frequency point separation between GSM and UMTS mode feature. It describes the feature MRFD-221703 2.0MHz Central Frequency point separation between GSM and UMTS mode(UMTS) and MRFD-211703 2.0MHz Central Frequency point separation between GSM and UMTS mode(GSM).

1.2 Intended Audience This document is intended for: z

Personnel familiar with basic principles of GSM and WCDMA

z

Personnel who need to understand this feature

z

Personnel 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: z

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

z

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

Document Issues The document issue is as follows: z

Draft A (2010-12-30)

Draft A (2010-12-30) This is the draft of the document for SRAN6.0. This is a new document.



1-1


2 Technical Description

2 Technical Description The propagation performance of the 900 MHz or 850 MHz band is better than that of the 2100 MHz band but 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 limited spectrum resources. Some telecom operators are unable to reserve 5 MHz bandwidth from the 850 MHz or 900 MHz band for UMTS services. However, to maintain their competitiveness, they still want to deploy new UMTS services on the 850 MHz or 900 MHz band. They use a non-standard bandwidth, for example, 3.8 MHz, for UMTS carriers, and 2.0 MHz frequency spacing between GSM and UMTS carriers. This method may deteriorate network KPIs, but for these operators, the competitive advantages brought 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 frequency spacing 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 any adverse effect of neighboring GSM frequencies on UMTS frequencies, the Huawei NodeB provides a 3.8 MHz bandwidth filter. This feature improves frequency utilization. Instead of providing 5 MHz bandwidth dedicated to UMTS services, this feature allocates 3.8 MHz bandwidth to UMTS and reserves 1.2 MHz bandwidth for GSM. This helps expand GSM network capacity.



2-1


3 Engineering Guidelines

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 is recommended and the GSM and UMTS networks are deployed by the same operator using Huawei equipment.

Recommended Configurations After this feature is activated, it is recommended that in a GSM network small-spaced frequencies be used for non-BCCH carriers, and PDCHs and SDCCHs be configured on non-interfered frequencies. This feature depends on the following features: z

Discontinuous Transmission (DTX)-Downlink

z

HUAWEI III Power Control Algorithm

z

Active Power Control

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

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

The throughput of UMTS HSPA services decreases because the GSM and UMTS networks interfere with 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.

z

The mean opinion scores (MOSs) of GSM and UMTS decrease.

z

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

z

This feature is not applicable to HSPA+ services.



3-1


4 Parameters

4 Parameters Table 4-1 Parameter description Parameter ID

NE

MML

Description

FMBWH

NodeB SET FREQBWH

Meaning: Indicates the minimum effective bandwidth of the carrier. GUI Value Range: 5000, 4800, 4600, 4400, 4200, 3800 Actual Value Range: 5000, 4800, 4600, 4400, 4200, 3800 Unit: kHz Default Value: 5000



4-1


5 Counters

5 Counters There are no counters related to this feature.



5-1


6 Glossary

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



6-1


7 Reference Documents

7 Reference Documents [1] BSC6900 GU Parameter Reference [2] BSC6900 GU MML Command Reference



7-1

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

Recommend Documents