LTE高负荷优化分析指导书2017-2-11目录一、背景..........................................................................................................................................3二、高负荷小区定义......................................................................................................................3三、指标提取..................................................................................................................................4四、总体应对策略..........................................................................................................................5五、高负荷小区分析处理流程.......................................................................................................6六、优化调整原则..........................................................................................................................76.1、覆盖优化调整................................................................................................................76.2、参数优化调整................................................................................................................76.3、负载均衡算法调整........................................................................................................86.4、载波聚合(CA)................................................................................................................86.5、新功能运用....................................................................................................................96.6、新技术应用....................................................................................................................9七、扩容优化原则........................................................................................................................107.1、小区分裂扩容..............................................................................................................107.2、小区载频扩容..............................................................................................................107.3、扩容类型及方式..........................................................................................................107.4、软硬扩容原则..............................................................................................................117.5、新建站扩容..................................................................................................................11附录参考文档..............................................................................................................................12一、背景随着LTE网络的发展和4G用户的快速逐渐增长,热点区域小区负荷也逐渐升高,用户的不均匀分布导致部分小区出现高负荷情况,热点区域小区均匀覆盖和单载波已经不能保障用户的需求,小区间覆盖伸缩和双载波部署越来越重要。急需通过覆盖调整、参数优化负荷均衡、资源扩容等方式需要在热点区域展开,以提升网络容量。二、高负荷小区定义2015年12月移动集团发布《中国移动4G无线网扩容标准(修订版)-高负荷待扩容集团标准(20151221)》,该文档中对高负荷小区进行了明确的定义:按照大、中、小包的小区分类确定标准,当小区7天自忙时平均达到门限时为LTE高负荷小区。小区分类标准及门限如下:扩容门限小区分类标准(小区自忙时平均E-RAB流量,KB)有数据传输的RRC数利用率上/下行流量(GB)上行利用率PUSCH下行利用率PDSCH/PDCCH大包小区≥10001050%70%/50%0.3/5中包小区<1000≥3002050%50%/50%0.3/3.5小包小...