【正文】 1 / 71XX 省電力系統(tǒng)廣域數(shù)據(jù)網(wǎng)絡(luò)組網(wǎng)技術(shù)方案XX 數(shù)碼科技集團(tuán)有限公司技術(shù)部 XXX1 / 711 電力系統(tǒng)業(yè)務(wù)需求 .................................................................................................1 內(nèi)部業(yè)務(wù) ......................................................................................................1 話音業(yè)務(wù) ............................................................................................1 視頻業(yè)務(wù) ............................................................................................2 數(shù)據(jù)業(yè)務(wù) ............................................................................................2 實(shí)時(shí)系統(tǒng) ..................................................................................2 準(zhǔn)實(shí)時(shí)系統(tǒng) ..............................................................................2 管理系統(tǒng) ..................................................................................2 其他應(yīng)用系統(tǒng) ..........................................................................3 外部業(yè)務(wù) ......................................................................................................3 路由資源出讓 ....................................................................................3 多余光纖出租 ....................................................................................3 富裕容量出租 ....................................................................................4 提供增值服務(wù) ....................................................................................42 網(wǎng)絡(luò)設(shè)計(jì)原則 .........................................................................................................4 先進(jìn)性與實(shí)用性相結(jié)合 ..............................................................................4 開(kāi)放性與標(biāo)準(zhǔn)性相結(jié)合 ..............................................................................4 可靠性與安全性相結(jié)合 ..............................................................................5 經(jīng)濟(jì)性與可擴(kuò)充性相結(jié)合 ..........................................................................5 網(wǎng)絡(luò)具有可管理性 ......................................................................................53 廣域網(wǎng)技術(shù)介紹 .....................................................................................................5 OSI 參考模型 ...............................................................................................5 基本概念 ............................................................................................5 通信協(xié)議 ..................................................................................7 層服務(wù) ......................................................................................7 信息交換 ..................................................................................8 物理層 ................................................................................................8 數(shù)據(jù)鏈路層 ........................................................................................8 網(wǎng)絡(luò)層 ................................................................................................9 傳輸層 ..............................................................................................10 會(huì)話層 ..............................................................................................10 表示層 ..............................................................................................11 應(yīng)用層 ..............................................................................................11 ATM 技術(shù) .....................................................................................................12 基本概念 ..........................................................................................12 信元結(jié)構(gòu) ................................................................................12 面向連接 ................................................................................12 統(tǒng)計(jì)復(fù)用 ................................................................................12 參考模型 ..........................................................................................13 ATM 適配層 ..............................................................................14 ATM 層 ......................................................................................15 ATM 物理層 ..............................................................................162 / 71 交換結(jié)構(gòu) ..........................................................................................16 ATM 交換結(jié)構(gòu)的基本功能 ......................................................16 ATM 交換結(jié)構(gòu)的分類(lèi) ..............................................................17 網(wǎng)絡(luò)信令 ..........................................................................................18 信令標(biāo)準(zhǔn)化 ............................................................................18 信令協(xié)議棧 ............................................................................19 UNI 信令 ..................................................................................20 NNI 信令 ..................................................................................20 信流管理 ..........................................................................................22 ATM 層業(yè)務(wù)結(jié)構(gòu) ......................................................................22 ATM 層服務(wù)質(zhì)量 ......................................................................23 流量控制 ................................................................................23 擁塞控制 ................................................................................24 IP 與 ATM 融合 .................................................................................24 CIPOA.......................................................................................25 LANE.........................................................................................26 MPOA.........................................................................................27 MPLS.........................................................................................28 IP OVER SDH（POS）技術(shù) ..........................................................................32 基本概念 ....................................