【正文】 .........................................................................................................53第四節(jié) 信令結(jié)構(gòu)及信令單元 ................................................................................................55. 信令系統(tǒng)的結(jié)構(gòu) ......................................................................................................56. 信令單元分類 ....................................................................................................................59 信令單元格式 ........................................................................................................................61 消息信令單元內(nèi)部格式 ........................................................................................................62 消息組名和消息名 ................................................................................................................67第五節(jié) 信令的基本流程 ........................................................................................................71 一次成功的呼叫過(guò)程 ............................................................................................................71 ISUP 基本呼叫過(guò)程 ...........................................................................................................72第六章 數(shù)字同步網(wǎng) .............................................................................................................................724 / 150第一節(jié) 數(shù)字同步網(wǎng)的同步方式 ......................................................................................................73. 網(wǎng)同步的必要性 ..................................................................................................................73. 數(shù)字同步網(wǎng)的同步方式 ......................................................................................................73第二節(jié) 數(shù)字同步網(wǎng)的性能指針及同步網(wǎng)的監(jiān)控 ............................................................................74 ........................................................................................................74 同步網(wǎng)的監(jiān)控管理網(wǎng)絡(luò) .......................................................................................................75 同步網(wǎng)的安全管理措施 .......................................................................................................75第三節(jié) 我國(guó)數(shù)字同步網(wǎng)簡(jiǎn)介 ............................................................................................................76 我國(guó)數(shù)字同步網(wǎng)采用的同步方式 .......................................................................................76第七章 軟交換網(wǎng)絡(luò) .............................................................................................................................77第一節(jié) 固網(wǎng)智能化 ........................................................................................................................77 固網(wǎng)智能化簡(jiǎn)介 ............................................................................................................77 固網(wǎng)智能化技術(shù)方案比較 ............................................................................................79第二節(jié) 軟交換技術(shù)簡(jiǎn)介 ................................................................................................................81 網(wǎng)絡(luò)總體結(jié)構(gòu) ................................................................................................................81 軟交換網(wǎng)絡(luò)總體結(jié)構(gòu) ....................................................................................................81第三節(jié) 軟交換網(wǎng)絡(luò)主要協(xié)議 ........................................................................................................82 ...................................................................................................................................83 SIP/SIPT 協(xié)議 ..................................................................................................................84 Sigtran 協(xié)議 .......................................................................................................................88 MGCP 協(xié)議 .......................................................................................................................89 ＳＣＴＰ ............................................................................................................................91第四節(jié) 呼叫流程示例 ....................................................................................................................92 模擬電話 ——模擬電話 .................................................................................................92 PSTN——PSTN...................................................................................................................94 模擬電話 ——SIP 終端 ..................................................................................................96第八章 移動(dòng)網(wǎng)絡(luò) .................................................................................................................................98第一節(jié) 移動(dòng)通信簡(jiǎn)介 ....................................................................................................................98 移動(dòng)通信發(fā)展簡(jiǎn)史 ........................................................................................................98 第三代移動(dòng)通信系統(tǒng)簡(jiǎn)介 ............................................................................................98 第三代移動(dòng)通信的標(biāo)準(zhǔn)化的制定 ................................................................................99 3G 三種制式的比較 .........................................................................................................100第二節(jié) 數(shù)字移動(dòng)通信技術(shù) ..........................................................................................................101 多址技術(shù) ......................................................................................................................101 RAKE 接收機(jī) ...................................................................................................................102 多用戶檢測(cè) ..................................................................................................................103 功率控制 ......................................................................................................................103 軟容量 ...........................................................