无线网络规划流程简介new

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1、上海贝尔阿尔卡特移动通信系统有限公司ShanghaiBellAlcatelMobileCommunicationSystemCo.,Ltd.无线网络规划流程简介(2000/10/18)第14页上海贝尔阿尔卡特移动通信系统有限公司ShanghaiBellAlcatelMobileCommunicationSystemCo.,Ltd.目录1.话务量规划1.1损耗系统(Losssystem)ErlangBtable1.2时隙配置1.3编码方式(Fullrate/Halfrate)1.4同心圆技术1.5话务模型2.覆盖规划2.1天

2、线系统2.2Linkbudget2.3自由空间波的损耗2.4各类模型2.5小区覆盖3.频率规划3.1频率复用度计算3.2频率分配3.3网络跳频技术第14页上海贝尔阿尔卡特移动通信系统有限公司ShanghaiBellAlcatelMobileCommunicationSystemCo.,Ltd.1.话务量规划在建网初期，预测网络及小区的话务量、建立网络话务模型是非常重要的。网络的话务量又体现为各种形式，包括语音、数据、传真、短消息等等。决定网络所能承担的话务负荷的主要因素有：系统类型、工作方式、网络技术、信道时隙配置等。1.

3、1损耗系统(Losssystem)损耗系统是指由于网络用户建立呼叫的无序性及突发性，导致实际网络容量小于理论容量的系统。GSM/DCS、NMT、TACS等无线系统都是损耗系统。其网络拥塞率可表示为：LossSystem(nslots)OfferedRejectedHandled1-1:LosssystemwithtrafficflowPblockblockingprobabilityrofferedtrafficinErlangnnumberoftrafficchannels在保证网络拥塞率小于某一标准值的情况下，可以得出

4、网络话务容量r与话务信道数n之间的关系表，称之为ErlangBtable表。Nr.ofBlockingProbabilityforErlangBchannels0.1%0.2%0.5%1%2%5%10.0010.0020.0050.0100.0200.05320.0460.0650.1050.1530.2230.38130.1940.2490.3490.4550.6020.89940.4390.5350.7010.8691.0921.52550.7620.9001.1321.3611.6572.21861.1461.325

5、1.6221.9092.2762.96071.5791.7982.1572.5012.9353.73882.0512.3112.7303.1283.6274.54392.5572.8553.3333.7834.3455.370103.0923.4273.9614.4615.0846.216113.6514.0224.6105.1605.8427.076124.2314.6375.2795.8766.6157.950134.8315.2705.9646.6077.4028.835145.4465.9196.6637.3528

6、.2009.730156.0776.5827.3768.1089.01010.633166.7217.2588.0998.8759.82811.544177.3787.9468.8349.65210.65612.461第14页上海贝尔阿尔卡特移动通信系统有限公司ShanghaiBellAlcatelMobileCommunicationSystemCo.,Ltd.188.0468.6449.57810.43711.49113.385198.7249.35110.33111.23012.33314.315209.41110.

7、06811.09212.03113.18215.2492110.10810.79311.86012.83814.03616.1892210.81211.52512.63513.65114.89617.1322311.52412.26513.41614.47015.76118.0802412.24313.01114.20415.29516.63119.0312512.96913.76314.99716.12517.50519.9852613.70114.52215.79516.95918.38320.9432714.4391

8、5.28516.59817.79719.26521.9042815.18216.05417.40618.64020.15022.8672915.93016.82818.21819.48721.03923.8333016.68417.60619.03420.33721.93224.8023117.4421