GPRS速率优化案例.doc

XXXXXX容量问题
通过话务统计分析，可以看到小区XXXXXX小区每天多个时段均在2G下载速率低列表，即2G下载速率低于30Kb/s，具体指标情况如下：
DATEPeriodCellIDGPRS下行IP总流量(MB)EDGE下行IP层流量(MB)下行EGDGIP吞吐率下行GPRSIP吞吐率2G下载速率11090508000900XXXXXX12.8114.6881.8526.6141.6111090509001000XXXXXX13.4319.8870.1617.7332.0011090510001100XXXXXX12.0310.4365.4823.1433.0711090511001200XXXXXX14.6115.7863.9517.8328.5111090512001300XXXXXX21.3018.4855.4816.0423.9611090513001400XXXXXX8.2116.38100.0620.1443.0511090514001500XXXXXX12.4724.5446.0316.0328.2311090515001600XXXXXX9.8423.6552.6618.6534.2911090516001700XXXXXX9.1623.7269.7317.7638.4211090517001800XXXXXX16.8020.4548.7417.0226.4811090518001900XXXXXX15.0313.7168.0925.1435.9611090519002000XXXXXX23.0814.0744.2018.5723.7911090520002100XXXXXX20.9022.7959.9919.1229.6611090521002200XXXXXX19.2425.3563.4517.5529.8111090522002300XXXXXX18.8612.6384.0422.2231.52结合现网小区数据和小区指标可以看到，由于该小区数据业务忙，而小区配置较小，只配置了4个载频，因此出现由于容量不足导致PDCH复用度高、PDCH分配成功率低、TCH清空PDCH次数高的现象，具体的指标情况如下：

DATEPeriodCellID平均占用PDCH下行EPDCH复用度下行PDCH复用度PDCH分配成功率PREJOTHTCH清空PDCH次数11090508000900XXXXXX17.703.422.5731.130.00268.0011090509001000XXXXXX17.674.743.5525.2360.00446.0011090510001100XXXXXX17.584.233.1327.3823.00441.0011090511001200XXXXXX16.555.313.8623.2367.00544.0011090512001300XXXXXX16.586.294.3216.89614.00352.0011090513001400XXXXXX16.524.113.0225.650.00181.0011090514001500XXXXXX15.865.203.8022.8949.00340.0011090515001600XXXXXX15.694.683.4323.312.00311.0011090516001700XXXXXX14.655.023.6824.534.00410.0011090517001800XXXXXX13.166.354.7022.97648.00614.0011090518001900XXXXXX14.974.763.5323.0510.00416.0011090519002000XXXXXX14.736.684.8120.7480.00579.0011090520002100XXXXXX15.596.624.5717.0656.00425.0011090521002200XXXXXX17.396.064.1215.54148.00320.0011090522002300XXXXXX18.294.613.1423.883.00120.00由以上指标分析可知，该小区由于信道不足导致2G下载速率低，建议对该小区进行扩容。
【调整方案】
将小区从4载频扩容到8载频配置，同时EDGE信道从8条扩到16条。
【优化效果】
小区2G平均下载速率从32.02％提升到49.09％，同时PDCH复用度从3.75％降到1.62％，PDCH分配功能率从22.90％提高到95.71％，具体指标对比如下：