SRANGU Refarming Network Solution
HUAWEI TECHNOLOGIES CO., LTD.
ivHuawei Proprietary and Confidential Copyright Huawei Technologies Co., LtdIssue 01 (2012-03-10)
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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iSite BTS3001C-116Product Description
Issue 01 (2012-03-10)Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd.v
About This DocumentAuthorPrepared bySRAN Solution Design DepartmentDate2012-06-07
2009-09-250.5Completed the first draft.Chen Shuai
2009-09-290.6Modified the first draft.Xiong Bin
2009-11-050.9Completed the initial release.Yang Liping
2009-12-261.0Added chapter 8.Yang Liping
2010-1-101.1Updated the data of nonstandard frequency separation.Added interference cancelation combining such as ICC, EICC, and SAIC that are related to Refarming large capacity.
2010-9-102.0Added the following information:Advantages of 900 MHz RefarmingThe application scenario and deployment policy of RefarmingThe definitions of nonstandard bandwidth and nonstandard frequency separationThe instruction to the application of flexible nonstandard bandwidthThe contents about frequencies with nonstandard separation not used in indoor GSM cells, frequencies with nonstandard separation not used in cells requiring large UMTS capacity, and enabling the UPA algorithm for resisting strong interference.Added buffer zone planning method on the live network.Rewrote the GSM network optimization measures after Refarming for delivery.Added per-sales performance solutions of Refarming.Added implementation steps of UMTS900 in the project implementation.Added the instruction to the difference between UO products and the Refarming.
2011-8-152.3Added the instruction to UMTS900 capacity gain.Updated the Refarming antenna solution.Added the impact of GSM frequency reuse on network performance, including the network simulations and KPI assessments when different frequency reuse patterns are adopted.Added chapter 11.
2012-5-153.0Rewrote the document based on the procedures of delivering the Refarming service products.Li Guowei
About This DocumentiSite BTS3001C-116Product Description
iSite BTS3001C-116Product DescriptionAbout This Document
ContentsAbout This DocumentiiPreface11 Refarming Overview21.1 What is Refarming?21.2 Why the GU 900 MHz Refarming21.3 Challenges of the GU 900 MHz Refarming32 Refarming Solution Procedures42.1 Procedures for Designing the Pre-Sale Refarming Solution42.2 Procedures for Delivering the Refarming Solution63 GSM Part73.1 Network Assessment73.1.1 GSM KPIs Assessment73.1.2 UMTS900 Terminal Penetration Rate Assessment73.1.3 GSM Frequency Plan Analysis83.1.4 GBSS Feature Analysis83.2 Solution Design83.2.1 Interference Analysis for GU Nonstandard Frequency Spacing83.2.2 Frequency Allocation Between GSM and UMTS Networks173.2.3 GU Intra-Frequency Buffer Zone Planning233.2.4 GUL Inter_Rat Mobility Solution263.2.5 GSM Traffic Transfer Solution273.3 Implementation293.3.1 Delivery Solutions293.3.2 Implementation Procedures323.4 Network Optimization and Acceptance333.4.1 Network Optimization333.4.2 GSM Network Acceptance344 UMTS Part354.1 Network Assessment354.1.1 Assessment and Analysis of KPIs354.1.2 UMTS900 Coverage/Capacity Assessment364.1.3 Identifying UMTS Value Areas364.2 Solution Planning374.2.1 Antenna Solutions374.2.2 UMTS Inter-Carrier Mobility Solution414.2.3 Power Configuration Analysis414.2.4 Parameter Configuration424.3 Network Implementation434.3.1 Policy for Deploying the UMTS900434.3.2 UMTS900 Hardware Installation434.3.3 Activating the UMTS900434.3.4 Setting the UMTS Filter444.4 Network Optimization and Acceptance444.4.1 UMTS Network Optimization444.4.2 UMTS Network Acceptance455 Refarming Scenarios46Reference Documents47
ContentsiSite BTS3001C-116Product Description
iSite BTS3001C-116Product DescriptionContents
PrefaceUMTS900 has advantages over UMTS2100. This drives most operators to reduce cost by deploying the UMTS900 network. Due to the frequency resource limitation, those operators cannot free a GSM 900 MHz frequency band of 5 MHz for Refarming. Therefore, they focus on the GU 900 MHz Refarming of a nonstandard bandwidth, such as 3.8 MHz, 4.2 MHz, or 4.6 MHz.To meet operators' requirements, this document provides the solution for the GU 900 MHz Refarming of 3.8 MHz, 4.2 MHz, or 4.6 MHz. This document is mapping with SRAN3.0 or later versions. The GU 900 MHz Refarming of 3.8 MHz is supported in SRAN6.0 or later versions. For reasons of simplicity and clarity, this document discusses 900 MHz Refarming. All the statements apply equally to 850 MHz Refarming.
SRANGU Refarming Network Solution0Preface
Issue 3.0 (2012-09-28)Huawei Proprietary and Confidential Copyright Huawei Technologies Co., Ltd.46
Refarming OverviewWhat is Refarming?Refarming is a strategy that telecom operators reuse their frequency resources and introduce new radio communication technologies to improve the spectral efficiency and data throughput. For example, the mainstream GU 900 MHz Refarming solution is that operators free about 5 MHz of the GSM on the 900 MHz band and deploy UMTS on the 900 MHz frequency band.On July 27, 2009, all 27 EU telecom ministers approved a 900 MHz Refarming bill that all the member countries are required to implement in six months to drive up the development of 3G mobile communication. The operators with the 900 MHz spectrum resources can put their spectrum Refarming plans in practice and use their desired mobile communication technologies in the 900 MHz frequency band without license restriction.Why the GU 900 MHz RefarmingThe advantages of implementing the GU 900 MHz Refarming are as follows:Gains in spectral efficiencyThe 900 MHz devices are most commonly used. Industry statistics show that by the end of 2008, about 80% of wireless devices work in the 900 MHz frequency band. By the end of 2009, the GSM900 license may be expired for many equipment suppliers and they have to apply for a license extension. In July, 2009, EU passed a resolution that the GSM900 band can be used for UMTS. In this manner, some operators can deploy a UMTS network without purchasing any UMTS licenses.Gains in coverageUMTS900 has a 7 dB path loss advantage over UMTS2100 in free space conditions. This advantage can be more than 20 dB in indoor scenarios. For details, see reference . As a result, the deployment of UMTS900 saves equipment cost by reducing the number of sites in suburban areas and provides a better and deeper indoor coverage in urban areas. Gains in capacityIn coverage-limited and non-interference-limited scenarios (for example, deep coverage areas in densely-populated urban areas or cell edge areas in suburban areas), UMTS900 has larger throughput and capacity than UMTS2100 since UMTS900 has higher receive levels and Ec/Io.
In the interference-limited scenario, capacity gains brought by UMTS900 coverage are reduced when interference increases. As a result, the UMTS900 coverage does not have gains in this scenario.Maturity of UMTS900 terminal industry chainsA large-scale industry chain of the UMTS900 terminals has taken shape. Based on GSA investigation, until February, 2012, the total number of the UMTS900 terminals has reached 719. It is predicted that by 2015, the market penetration rate of the UMTS900 terminals will reach 100%.As a result, more and more operators plan to improve their competitiveness by implementing the GU 900 MHz Refarming and the GU 900 MHz Refarming is becoming the trend in the industry.Challenges of the GU 900 MHz RefarmingThe GU 900 MHz Refarming also brings challenges to network planning and may affect network performance. The following are operators' concerns about implementing the GU 900 MHz Refarming:How to reduce co-channel and adjacent-channel interference between GSM900 and UMTS900 networksAfter the Refarming, the GSM frequency resources are greatly reduced. In this case, how to smoothly transfer GSM900 traffic to the GSM1800 or UMTS900 network to keep the GSM network qualityWhether the antenna of the GSM900 network can be reused by the UMTS900 network with network quality kept and cost savedHow to balance traffic load among the GSM, UMTS, and LTE networks after the UMTS900 deploymentThe precedi