【正文】 PWE3：端到端偽線仿真 QoS:服務(wù)質(zhì)量 IP:互聯(lián)網(wǎng)協(xié)議 IPTV： IP 電視 SDH：同步數(shù) TDM：時分復(fù)用 TMPLS：傳送 MPLS WDM：波分復(fù)用 致謝 ? 交叉容量 50G、 90G ? 業(yè)務(wù)槽位 /總槽位數(shù)量 8/12 ? 應(yīng)用場景 邊緣匯聚、重要接入節(jié)點 ? 機(jī)械尺寸 ? 173mm(H) 440mm(W) 245mm(D) ? 交叉容量 5G~20G ? 業(yè)務(wù)槽 位 /總槽位數(shù)量 1/1 ? 應(yīng)用場景 城域邊緣接入節(jié)點 ? 機(jī)械尺寸 44mm(H) 440mm(W)380mm(D) ? 交叉容量 160G、 320G ? 業(yè)務(wù)槽位 /總槽位數(shù)量 24/32 ? 應(yīng)用場景 城域核心、匯聚節(jié)點 ? 機(jī)械尺寸 923mm(H) 496mm(W)248mm(D) PTN（分組傳送網(wǎng)）組網(wǎng)應(yīng)用 26 在此對四年來所有教導(dǎo)過我的老師表示感謝。由此可見。其中 2,3個 PTN 骨干節(jié)點分別與 30GRNC 中的兩個節(jié)點組建波分環(huán)。對于 PTN 網(wǎng)絡(luò)，由于其兼顧了 IP 和 MSTP 的優(yōu)勢，特別是在 QoS 方面，通過端到端 QoS 機(jī)制，可實現(xiàn)整個網(wǎng)絡(luò)根據(jù)業(yè)務(wù)流量預(yù)先分配帶寬，在網(wǎng)絡(luò)的轉(zhuǎn)發(fā)節(jié)點上根據(jù)隧道的優(yōu)先級進(jìn)行調(diào)度處理。骨干層應(yīng)具有較大的業(yè)務(wù)匯聚，調(diào)度和傳送能力。隨著 3G，寬帶升級及 WLAN 等 分組業(yè)務(wù)的迅速發(fā)展， MSTP 網(wǎng)絡(luò)開始呈現(xiàn)力不從心，主要表現(xiàn)在： （ 1）帶寬利用率較低。 目前在商用化方面來看，鑒于標(biāo)準(zhǔn)、產(chǎn)業(yè)成熟度、關(guān)鍵問題的解決進(jìn)度等問題，各個廠商在標(biāo)準(zhǔn)、產(chǎn)品等方面雖然都投入了不少精力，烽火通信作 為國內(nèi)最早開始研發(fā) MSTP 設(shè)備的制造商之一，從 2021 年開始研發(fā)到 2021 年后大規(guī)模的商用的過程中，積累了豐富的數(shù)據(jù)和傳輸經(jīng)驗，并在此過程中不斷完善 MSTP 產(chǎn)品，通過了各大運(yùn)營商的大型測試。 （ 2）有業(yè)務(wù)需求的核心骨干層 PTN 節(jié)點之間通過直達(dá)鏈路連接，大大降低了核心骨干層 PTN 節(jié)點的連接成本，提高了設(shè)備利用率，提高了業(yè)務(wù)的安全性。 每基站在 HSDPA+階段峰值帶寬約為 30M，收斂比為 :1；在 LTE階段峰值為 20MHz*3 扇區(qū)基站的下行峰值帶寬為 310Mbps，收斂比為2:1，電信級分組傳送網(wǎng)傳輸速率一般為 85%。如圖 所示： PTN（分組傳送網(wǎng)）組網(wǎng)應(yīng)用 6 圖 PTN 網(wǎng)絡(luò)分層 OAM 功能 示意圖 PTN 網(wǎng)絡(luò)的生存性技術(shù) PTN 網(wǎng)絡(luò)的生存性技術(shù) TMPLS 的生存性是分組傳送網(wǎng)的另一個主要特征，其主要由基于傳送平面的保護(hù)倒換技術(shù)和基于平面的恢復(fù)技術(shù)來實現(xiàn)。 PTN 技術(shù)的基本原理 TDM 業(yè)務(wù)的相對萎縮及“全 IP 環(huán)境”的逐漸成熟，要求設(shè)備從多業(yè)務(wù)接口適應(yīng)性向多業(yè)務(wù)內(nèi)核適應(yīng)性轉(zhuǎn)變，業(yè)務(wù)的 IP 化對傳送網(wǎng)本身提出了分組化要求。隨著 40G 路由器的出現(xiàn)，傳送PTN（分組傳送網(wǎng)）組網(wǎng)應(yīng)用 2 網(wǎng)所承載的顆粒越來越大，并將稀釋 SDH 層的匯聚功能。 關(guān)鍵詞：分組傳送網(wǎng) ,城域傳送網(wǎng) ,PTN TMPLS， IP ， SDH PTN（分組傳送網(wǎng)）組網(wǎng)應(yīng)用 2 Abstract Abstract: With a large number of new business emerging and the rapid expansion of the scale of the work, the fusion of the munication industry trend of performance: add outstanding. Mobile work architecture from 2 G to 3 G followup to the evolution of 4 G, mobile work in to the IP, broadband in the process of development, the transmission to put forward higher request. SDH/MSTP though a high reliability, high stability, easy to management features, but 3 G and all the business operation to e, make SDH/MSTP bearing IP packet when existing business low efficiency, plex configuration, and flexibility and expansibility difference is difficult to meet the disadvantages of the practical needs. Transmission and need to be flexible, efficient and low cost the grouping of platform to realize the transfer business unified carrying and work integration, so packet transmission work (PTN) technology application and life. PTN Packet transmission Network (Packet Transport Network, PTN) not only keep the traditional SDH (Synchronous Digital Hierarch, Synchronous Digital system) transmission Network advantages, but also increased the data to the nature of the business, such as Packet switching, multiplexing, using connectionoriented label switching, etc. These characteristics make PTN has the very strong transmit ability, can is applicable to different business needs, to bee the global hot topic. At present in the state PTN standardization, each manufacturer has launched the corresponding PTN equipment, each big operators also began to product testing, and even began to establish PTN work. For this, we follow the trend of The Times, this paper introduced prehensively PTN key technology system, application scenarios, work positioning and deployment strategy, and so on. Finally, based on the current situation of xining city uni work and mobile, broadband, big customers three business work load demand, analysis of xining uni intracity works are currently facing pressure, and then discusses PTN technology in xining local transmission work construction necessity and the construction of xining uni intracity works work scheme. Key words: Packet transmission work metropolitan area transport s PTN TMPLS IP SDH 青海民族大學(xué)畢業(yè)論文 3 目 錄 緒論 ?????????????????? ???????? 1 1 分組傳送網(wǎng)（ PTN）概述 ???????????????? 3 PTN 技術(shù)簡介 ???????????????????? 3 PTN 技術(shù)的原理 ??????????????????? 3 PTN 技術(shù)特點與形態(tài) ????????????????? 3 PTN 與 SDH 區(qū)別 ??????????????????? 4 PTN 的體系構(gòu)架和網(wǎng)絡(luò)功能平面 ???????????? 4 PTN 關(guān)鍵技術(shù) ???????????????????? 5 OAM 技術(shù) ???? ????????????????? 5 PTN 網(wǎng)絡(luò)的生存性技術(shù) ??????????????? 6 PTN 網(wǎng)絡(luò)的全業(yè)務(wù)提供技術(shù) ????????????? 6 2 PTN 網(wǎng)絡(luò)層次定位與網(wǎng)絡(luò)應(yīng)用場景分析 ????????