【資料名稱】：SDH入門教程

【資料作者】：不詳

【資料日期】：不詳

【資料語(yǔ)言】：中文

【資料格式】：PDF

【資料目錄和簡(jiǎn)介】：

MSCBSC通信教程－SDH入門教程

目錄
SDH產(chǎn)生的技術(shù)背景——為什么會(huì)產(chǎn)生SDH傳輸體制................................................... 5
接口方面................................................................................................................... 5
復(fù)用方式................................................................................................................... 6
運(yùn)行維護(hù)方面............................................................................................................ 7
沒有統(tǒng)一的網(wǎng)管接口................................................................................................. 7
與PDH相比SDH有哪些優(yōu)勢(shì)......................................................................................... 8
接口方面................................................................................................................... 8
復(fù)用方式................................................................................................................... 9
運(yùn)行維護(hù)方面............................................................................................................ 9
兼容性...................................................................................................................... 9
SDH的缺陷所在.......................................................................................................... 10
頻帶利用率低.......................................................................................................... 10
指針調(diào)整機(jī)理復(fù)雜.................................................................................................. 10
軟件的大量使用對(duì)系統(tǒng)安全性的影響 ...................................................................... 10
2.1 SDH信號(hào)——STM-N的幀結(jié)構(gòu)................................................................................ 11
2.2 SDH的復(fù)用結(jié)構(gòu)和步驟......................................................................................... 13
2.2.1 140MBIT/S復(fù)用進(jìn)STM-N信號(hào)........................................................................... 15
2.2.2 34MBIT/S復(fù)用進(jìn)STM-N信號(hào)............................................................................ 18
2.2.3 2MBIT/S復(fù)用進(jìn)STM-N信號(hào)............................................................................. 19
2.3 映射、定位和復(fù)用的概念...................................................................................... 22
3.1開銷...................................................................................................................... 26
3.1.1段開銷............................................................................................................. 26
3.1.2通道開銷......................................................................................................... 31
3.2指針..................................................................................................................... 35
3.2.1管理單元指針（AU-PTR）................................................................................ 35
3.2.2支路單元指針（TU-PTR）................................................................................ 37
4.1 SDH網(wǎng)絡(luò)的常見網(wǎng)元 ............................................................................................. 39
4.2 SDH設(shè)備的邏輯功能塊.......................................................................................... 41
5.1基本的網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu).............................................................................................. 55
5.2鏈網(wǎng)和自愈環(huán) ........................................................................................................ 57
5.2.1鏈形網(wǎng)............................................................................................................. 57
5.2.2環(huán)網(wǎng)——自愈環(huán) ............................................................................................ 59
5.3復(fù)雜網(wǎng)絡(luò)的拓?fù)浣Y(jié)構(gòu)及特點(diǎn)................................................................................... 68
5.4 SDH網(wǎng)絡(luò)的整體層次結(jié)構(gòu)....................................................................................... 71
6.1光纖的種類............................................................................................................ 73
6.2 光接口類型........................................................................................................... 73
6.3光接口參數(shù)............................................................................................................ 74
6.3.1光線路碼型................................................................................................... 74
6.3.2 S點(diǎn)參數(shù)——光發(fā)送機(jī)參數(shù).............................................................................. 75
6.3.3R點(diǎn)參數(shù)——光接收機(jī)參數(shù).............................................................................. 75
7.1同步方式............................................................................................................... 76
7.2主從同步網(wǎng)中從時(shí)鐘的工作模式............................................................................ 77
7.3 SDH的引入對(duì)網(wǎng)同步的要求................................................................................... 78
7.4 SDH網(wǎng)的同步方式.................................................................................................. 78
7.4.1SDH網(wǎng)同步原則............................................................................................... 79
7.4.2 SDH網(wǎng)元時(shí)鐘源的種類.................................................................................... 79
7.4.3 SDH網(wǎng)絡(luò)常見的定時(shí)方式................................................................................. 80
7.5 S1字節(jié)和SDH網(wǎng)絡(luò)時(shí)鐘保護(hù)倒換原理.................................................................... 82
8.1誤碼性能............................................................................................................... 86
8.1.1誤碼的產(chǎn)生和分布........................................................................................... 86
8.1.2誤碼性能的度量.............................................................................................. 86
8.1.3數(shù)字段相關(guān)的誤碼指標(biāo).................................................................................... 87
8.1.4誤碼減少策略................................................................................................ 87
8.2可用性參數(shù)............................................................................................................ 88
8.3抖動(dòng)漂移性能 ........................................................................................................ 88
8.3.1抖動(dòng)和漂移的產(chǎn)生機(jī)理.................................................................................... 88
8.3.2抖動(dòng)性能規(guī)范................................................................................................ 89
8.3.3抖動(dòng)減少的策略.............................................................................................. 90
附：專用詞匯及縮略語(yǔ)................................................................................................... 90
波分復(fù)用技術(shù)概述.......................................................................................................... 92
波分復(fù)用光傳輸技術(shù)................................................................................................... 92
波分復(fù)用的基本概念............................................................................................... 92
WDM技術(shù)的發(fā)展背景............................................................................................. 93
DWDM原理概述......................................................................................................... 94
WDM設(shè)備的傳輸方式................................................................................................. 96
單向WDM ................................................................................................................. 96
雙向WDM ................................................................................................................. 96
開放式與集成式系統(tǒng)................................................................................................... 97
WDM系統(tǒng)組成........................................................................................................... 97
WDM的優(yōu)勢(shì)............................................................................................................... 98
CWDM簡(jiǎn)介................................................................................................................ 99
WDM傳輸媒質(zhì)..............................................................................................................101
光纖的結(jié)構(gòu)................................................................................................................101
光纖的種類................................................................................................................102
光纖的基本特性.........................................................................................................103
幾何尺寸（模場(chǎng)直徑）..........................................................................................103
衰減常數(shù)................................................................................................................103
色散系數(shù)................................................................................................................103
DWDM關(guān)鍵技術(shù)...........................................................................................................105
光源 ..........................................................................................................................105
激光器的調(diào)制方式.................................................................................................105
激光器的波長(zhǎng)的穩(wěn)定..............................................................................................108
光電檢測(cè)器................................................................................................................109
PIN光電二極管......................................................................................................109
雪崩光電二極管（APD）........................................................................................109
光放大器 ...................................................................................................................110
光放大器概述.........................................................................................................110
摻鉺光纖（EDF）..................................................................................................111
EDFA增益平坦控制................................................................................................111
EDFA的增益鎖定....................................................................................................112
摻鉺光纖放大器的優(yōu)缺點(diǎn).......................................................................................113
拉曼光纖放大器.....................................................................................................114
有關(guān)光放大器的技術(shù)指標(biāo).......................................................................................115
光復(fù)用器和光解復(fù)用器..............................................................................................115
光柵型波分復(fù)用器.................................................................................................116
介質(zhì)薄膜型波分復(fù)用器..........................................................................................117
熔錐型波分復(fù)用器.................................................................................................118
集成光波導(dǎo)型波分復(fù)用器.......................................................................................119
波分復(fù)用器件性能比較..........................................................................................119
對(duì)光復(fù)用器件的基本要求.......................................................................................119
光監(jiān)控信道................................................................................................................121
光監(jiān)控通路要求.....................................................................................................121
監(jiān)控通路接口參數(shù).................................................................................................122
監(jiān)控通路的幀結(jié)構(gòu).................................................................................................122
DWDM光傳輸系統(tǒng)的技術(shù)規(guī)范 ......................................................................................124
ITU-T有關(guān)WDM系統(tǒng)的建議......................................................................................124
傳輸通道參考點(diǎn)的定義..............................................................................................124
光波長(zhǎng)區(qū)的分配.........................................................................................................125
專用詞匯及縮略語(yǔ)............................................................................................................ 0

[ 本帖最后由 wangyuan072 于 2009-9-3 13:30 編輯 ]