高速铁路现网优化技术方案中国移动通信集团广东有限公司2007年6月目录一、前言...................................................................................................................4二、研究背景...........................................................................................................52.1铁路提速........................................................................................................................52.2CRH简介[1]......................................................................................................................5三、高速列车对现网质量的影响分析....................................................................63.1穿透损耗........................................................................................................................63.2覆盖信号强度需求........................................................................................................63.2.1手机在单小区内的最低信号强度需求..................................................................63.2.2考虑切换的最低信号强度......................................................................................63.2.3小区覆盖半径.........................................................................................................73.3相邻小区的重叠区域....................................................................................................83.3.1Idle模式下的小区重选..........................................................................................83.3.2Active模式下的切换............................................................................................103.4小结..............................................................................................................................10四、高速铁路的优化策略......................................................................................114.1覆盖优化......................................................................................................................114.2重选与切换算法优化..................................................................................................114.3专网覆盖与现网调整..................................................................................................114.3.1专网覆盖与现网调整的相同点............................................................................124.3.2专网覆盖与现网调整的差异................................................................................124.3.3专网覆盖与现网调整的技术特点分析................................................................124.3.4现网调整与专网覆盖的融合................................................................................13五、现网覆盖优化技术..........................................................................................145.1现网覆盖小区序列的整理...........................................................................................145.2GSM1800网的信号调整..............................................................................................145.3现网覆盖小区天线调整...............................................................................................145.4分裂第四小区..............................................................................................................175.5功分扇区.................................................
