GSM双频网

双频网优化指导手册

双频网优化指导手册 （2011版）

网络部 2011.08 双频网优化指导手册

目 录

1 前言 ··················································································································· 1 2 双频网引入 ········································································································ 1 2.1 覆盖及组网原则 ................................................................................................. 2 2.1.1 站址及覆盖 ···································································································· 2 2.1.2 组网方式 ········································································································ 5 2.2 天馈建设原则 .................................................................................................... 8 2.3 频率资源使用 .................................................................................................... 9 3 双频网优化 ······································································································ 10 3.1 优化思路及分析手段 ....................................................................................... 10 3.1.1 话务统计分析 ······························································································· 10 3.1.2 路测问题分析 ······························································································· 12 3.2 双频网优化方法 ............................................................................................... 12 3.2.1 天馈调整 ······································································································ 12 3.2.2 功率调整 ······································································································ 13 3.2.3 参数配置 ······································································································ 13 3.3 分场景参数设置建议 ....................................................................................... 17 3.3.1 密集城区 ······································································································ 17 3.3.2 一般城区 ······································································································ 18 3.3.3 1800网络边界 ······························································································ 19 3.3.4 高校区域（话务密度超高区域） ·································································· 20 4 总结 ················································································································· 21 双频网优化指导手册

1 1 前言 随着GSM网络规模的日益壮大，不断增长的网络容量需求和有限频率资源之间的矛盾日益突出。GSM900M频率资源有限，频率复用极度紧张，不仅使网络容量受到限制，而且网内的频率干扰也制约了通话质量。新增用户的快速增加、数据及其它新业务的开展也对GSM900M单频网络提出了挑战。 DCS1800M网络的引入，不但可以利用1800M丰富的频率资源来解决GSM900频率资源不足的情况，使网络容量得到增强，还可以分担GSM900的话务，缓解网络的拥塞，降低无线干扰。对我省大部分区域来说，还处在1800M的引入的初期阶段，非常缺少双频网维护优化经验。如何均衡好两张网络的负荷、同时提升两张网络的质量，是省内优化人员面临的新问题。为此，省公司网络部在充分调研的基础上组织编写了本手册，希望能给各地市公司优化人员在建设优化中提供一些思路和帮助。

2 双频网引入 2011年集团公司下发了《网络结构及双频网优化策略》，其中指出了1800M的引入原则： 网络建设初期以900M网为主，在900M网络话务负荷较高时才引入1800M网络，由于工程建设需要一定周期，建议在室外宏站900M话务密度达到或接近保证质量的最大话务密度的70%时采取措施进行改善，在不同话务密度时建议1800M网络业务占比不同。按满足基本4*3复用判定1800M网络引入策略，原则上900M网络基站载频配置不能超过7/7/7，超过业务应采用1800M网络来承载。对于900/1800M频率均资源紧张的城市，应申请部分1800M频率资源，缓解频率资源不足的问题，提升无线网络质量。 表 2-1 双频网建设参考对照表 总话务密度(ERL/平方公里) 300米间距1800M网占比 400米间距1800M网占比 500米间距1800M网占比 600米间距1800M网占比 100 无需建设1800M网 无需建设1800M网 无需建设1800M网 无需建设1800M网 200 无需建设1800M网 无需建设1800M网 无需建设1800M网 开始引入1800M网 300 无需建设1800M网 无需建设1800M网 开始引入1800M网 开始引入1800M网 400 无需建设1800M网 无需建设1800M网 开始引入1800M网 25% 500 无需建设1800M网 开始引入1800M网 20% 40% 双频网优化指导手册 2 600 无需建设1800M网 开始引入1800M网 33% 50% 700 无需建设1800M网 14% 43% 57% 800 开始引入1800M网 25% 50% 话务密度超极限 900 开始引入1800M网 33% 56% 话务密度超极限 1000 开始引入1800M网 40% 话务密度超极限 话务密度超极限 1100 9% 45% 话务密度超极限 话务密度超极限 1200 17% 50% 话务密度超极限 话务密度超极限 1300 23% 54% 话务密度超极限 话务密度超极限 1400 29% 57% 话务密度超极限 话务密度超极限 1500 33% 话务密度超极限 话务密度超极限 话务密度超极限 1600 38% 话务密度超极限 话务密度超极限 话务密度超极限 1700 41% 话务密度超极限 话务密度超极限 话务密度超极限 1800 44% 话务密度超极限 话务密度超极限 话务密度超极限 1900 47% 话务密度超极限 话务密度超极限 话务密度超极限 2000 50% 话务密度超极限 话务密度超极限 话务密度超极限 2100 52% 话务密度超极限 话务密度超极限 话务密度超极限 2200 55% 话务密度超极限 话务密度超极限 话务密度超极限 2300 57% 话务密度超极限 话务密度超极限 话务密度超极限 2400 58% 话务密度超极限 话务密度超极限 话务密度超极限 2500 60% 话务密度超极限 话务密度超极限 话务密度超极限 2600 话务密度超极限 话务密度超极限 话务密度超极限 话务密度超极限

以下结合我省实际从覆盖及组网、天馈建设、频率资源三个方面来说明1800M规划建设的相关建议。 2.1 覆盖及组网原则

2.1.1 站址及覆盖 为了有效缓解900M网络的压力，目前主要考虑在城市密集区域及高校等高话务热点区域引入1800M网络的建设。 1800M网络的覆盖方式可以分为以下两种方式： （1）热点地区零星覆盖