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1、1,PHS网络优化技术培训,UT斯达康（中国）有限公司,项目与技术支持部门网络优化组 许钢 2003年4月,2,目录,PHS空中接口原理PHS空中呼叫流程基站话统含义解释性能指标公式解释基站告警解释优化软件使用介绍,3,PHS空中接口原理,PHS频率资源简介信道的基本结构PHS空中接口的基本信道种类与功能PHS空中接口的主要信令及功能,4,PHS频率资源简介,控制载频=No:26 保护载频=No:25、27 话音载频=No:18-No:67，频率1900MHz-1915MHz 传播特点：频率高，电波绕射能力差，传播主要依靠直射，反射，折射和穿透。频率间隔：300KHz接入方式：TDMA双工方式
2、：TDD,5,TDMA-TDD单帧结构(一）,空中接口速率=240/0.625=384kbit/s,6,TDMA-TDD单帧结构（二）,7,控制载频上的复帧结构,在控制载频的100ms的帧周期里，RP TX(下行链路)共有420=80个时隙，理论上可分配给40(80)个RP作为各自的控制时隙。,8,控制载频逻辑信道超帧结构,超帧 100ms x 12,9,控制时隙、通信时隙结构,语音编码速率=160bit/5ms=32kbit/s,10,时隙中各种信号的功能,11,信道结构示意,TDMA/TDD Frame(5ms),Channel 67Channel 66Channel 19Channel
3、18,信道,12,信道的分类,协议信道用于呼叫过程特定阶段的各种功能信道的组合功能信道控制时隙或通信时隙中的部分比特所构成的完成特定功能的信道,13,信道的分类,14,协议信道的分类,协议信道逻辑控制信道(LCCH)链路信道(LCH)服务信道(SCH),15,功能信道的分类,功能信道控制信道(CCH)公共信道广播控制信道（BCCH）寻呼信道（PCH）信令控制信道（SCCH）独立信道随路控制信道（ACCH）慢速随路控制信道（SACCH）快速随路控制信道（FACCH）业务信道(TCH),16,LCCH构成,17,LCCH构成,超帧下行链路的使用分配举例,nPCH=2, nSUB=3, nSG=1,
4、 nGROUP=4,18,LCH/SCH信道构成,19,无线接口主要消息,LCCH信道消息广播消息信道设定消息寻呼消息第三层消息无线管理消息（RT)移动性管理消息(MM)呼叫控制消息(CC),20,广播消息,21,信道建立消息,22,寻呼消息,23,第三层消息,无线传输消息（RT）移动性管理消息（MM）呼叫控制消息（CC）,24,RT消息,25,MM消息,26,CC消息,27,知识点,掌握基本帧、复帧、超帧结构了解各种信道的作用了解各种消息的作用了解协议分层概念,28,详细空中呼叫流程,主叫呼叫流程被叫呼叫流程Handover 流程 - PS发起 - CS发起T-Ch Switching 流程
5、 - PS发起 - CS发起位置登记流程错误呼叫流程,29,主叫呼叫流程,Link channel establishment request,Synchronization burst,Synchronization burst,SABM,CC Call Proceeding,RT definition information request,RT definition information acknowledge,SCCH,Link channel assignment,SCCH,FACCH/SACCH,UA,FACCH/SACCH,CC Setup,FACCH/SACCH,FACCH/
6、SACCH,FACCH/SACCH,FACCH/SACCH,RT function request,FACCH/SACCH,RT function request response,FACCH/SACCH,ST6,RT encryption key set,FACCH/SACCH,MM function request,MM function request response,FACCH/SACCH,FACCH/SACCH,CC Alerting,FACCH/SACCH,MM authentication request response,FACCH/SACCH,DISC,FACCH,FACC
7、H,UA,MM authentication request,SACCH,CC Connect,SACCH,Communication in progress,ST10,ST17,ST18,PS,CS,PS,CS,30,被叫呼叫流程,Link channel establishment request,Synchronization burst,Synchronization burst,SABM,CC Call Proceeding,RT definition information request,RT definition information acknowledge,SCCH,Lin
8、k channel assignment,SCCH,FACCH/SACCH,UA,FACCH/SACCH,CC Setup,FACCH/SACCH,FACCH/SACCH,FACCH/SACCH,FACCH/SACCH,RT function request,FACCH/SACCH,RT function request response,ST11,RT encryption key set,FACCH/SACCH,MM function request,MM function request response,FACCH/SACCH,FACCH/SACCH,CC Alerting,FACCH
9、/SACCH,MM authentication request response,FACCH/SACCH,MM authentication request,SACCH,CC Connect,SACCH,Communication in progress,ST6,ST19,ST20,PS,CS,PS,CS,CC Connect ACK,SACCH,FACCH/SACCH,Paging response,FACCH/SACCH,Paging,PCH,ST10,31,Handover & TCH Switching,Handover在不同CS下切换时,T-ch Switching 在同一个CS里
10、,TS可能改变，RF 频率可能改变（根据无线信号的情况）,32,RT TCH Switching request FACCH & SACCH,Handover-PS发起,PS Origin CS Destination CS,Link Channel Request,Link Channel Assign,Synchronization Burst,Synchronization Burst,Synchronization Burst,SABM,UA,CC Setup,FACCH & SACCH,FACCH & SACCH,SCCH,SCCH,CC Call Proceeding,RT Fun
11、ction Request,RT Function Request Response,RT Encryption Key Set,MM Function Request,MM Function Request Response,Disconnect,UA,CC Connect,Communication,RT TCH Switching indication FACCH & SACCH,FACCH / SACCH,FACCH / SACCH,FACCH / SACCH,FACCH / SACCH,FACCH / SACCH,FACCH / SACCH,FACCH / SACCH,FACCH,F
12、ACCH,SACCH,ST31,ST6,ST10,ST28,ST29,ST30,33,Handover-CS发起,PS Origin CS Destination CS,Link Channel Request,Link Channel Assign,Synchronization Burst,Synchronization Burst,Synchronization Burst,SABM,UA,CC Setup,FACCH & SACCH,FACCH & SACCH,SCCH,SCCH,CC Call Proceeding,RT Function Request,RT Function Re
13、quest Response,RT Encryption Key Set,MM Function Request,MM Function Request Response,Disconnect,UA,CC Connect,Communication,RT TCH Switching indication FACCH & SACCH,FACCH / SACCH,FACCH / SACCH,FACCH / SACCH,FACCH / SACCH,FACCH / SACCH,FACCH / SACCH,FACCH / SACCH,FACCH,FACCH,SACCH,ST31,ST6,ST10,ST2
14、8,ST29,34,PS Origin Destination Channel Channel,TCH Switching-PS发起,RT TCH Switching Request FACCH / SACCH,RT TCH Switching indication FACCH / SACCH,Communication,Synchronization Burst,Synchronization Burst,SABM SACCH,UA SACCH,Synchronization Burst,Communication,ST25,ST26,ST27,35,TCH Switching-CS发起,PS Origin Destination Channel Channel,
