基站系统无线网络参数VIP免费

s基站系统无线网络参数索引1概要.........................................................................................22越区切换.....................................................................................32.1综述.....................................................................................32.2越区切换过程的步骤.......................................................................32.3越区切换的类型...........................................................................42.4越区切换原因.............................................................................42.5越区切换的决定...........................................................................52.6目标小区列表的生成.......................................................................72.7练习:越区切换..........................................................................93降低干扰的方式(IRF).........................................................................133.1动态功率控制............................................................................133.1.1综述..................................................................................133.1.2功率控制的决定过程....................................................................143.1.3练习：功率控制........................................................................183.2跳频....................................................................................193.2.1综述..................................................................................193.2.2基带跳频..............................................................................193.2.3综合跳频..............................................................................203.3DTX(断续发射)...........................................................................20Preparedby:SBSWorkshope835abf8-8d29-4e5b-bb8b-504cce90c453.docxSSMCNetworkOptimizationPage1of21s1概要目标了解各种网络结构的概念参数调整解释无线链路的控制算法了解各个网络参数间的相互影响解释参数调整对无线网络性能的影响内容越区切换机制降低干扰机制（动态功率控制，跳频，断续发射）多层网络结构（微小区，双频网）路测Preparedby:SBSWorkshope835abf8-8d29-4e5b-bb8b-504cce90c453.docxSSMCNetworkOptimizationPage2of21s2越区切换2.1综述在蜂窝移动通信中最重要的算法就是越区切换算法。它的主要目标：当服务小区改变（位置移动）时维持通话接续在干扰严重的情况下进行信道切换小区边界及无线网络结构的设计2.2越区切换的步骤越区切换过程可以分成一系列子过程。下表列出了这些子过程以及执行该过程的网络设备。子过程执行设备1.测量–“当前服务小区”的连接质量–“相邻小区”的接收电平MS,BTSMS2.测量值预处理BTS3.邻区记录BTS4.越区切换决定BTS5.目标小区列表的生成BTS6.目标小区选择–BSS内的切换–BSS间的切换BSCMSC7.新信道的选择BSC8.越区切换执行MS,BTS,BSC,MSC2.3越区切换的类型如下图2.1所示，越区切换的类型可以根据区域改变方式的不同（蜂窝内、BSS区域内或MSC区域内)来进行定义。某种类型的切换是否被允许由相应的参数设置决定。Preparedby:SBSWorkshope835abf8-8d29-4e5b-bb8b-504cce90c453.docxSSMCNetworkOptimizationPage3of21s图2.1越区切换类型注释:IntracellHandover:小区内切换Intra-BSSHandover:BSS内切换Intra-MSC:MSC内切换Inter-MSC:MSC间切换类型2,3,4也被称为小区间的切换2.4越区切换原因越区切换有以下四个原因：质量太差<->误码率太高接收电平太低MS-BS距离太远存在更合适的小区（功率余量切换:与接收电平有关）2.5越区切换的决定越区切换类型缩写决定标准质量引起...