廊坊市sdh傳輸網(wǎng)擴容畢業(yè)設計定稿

1、I摘 要隨著通信業(yè)務的發(fā)展，數(shù)據(jù)通信也有了新的進步，其主要表現(xiàn)在應用種類的增加，寬帶使用率的急速上升，這使得廊坊市現(xiàn)有的傳輸網(wǎng)絡無法適應這種需求，為更好的滿足人們的需要，必須有一新的技術(shù)代替原有的技術(shù)，實現(xiàn)網(wǎng)絡的互聯(lián)。美國貝爾實驗室提出了 SDH 并逐步成為當今世界通信領域在傳輸技術(shù)方面的一個發(fā)展熱點，SDH 的出現(xiàn)完全改變了光通信的接入方式。本文是以廊坊為例，通過調(diào)查廊坊市傳輸網(wǎng)現(xiàn)在的情況，又結(jié)合了 SDH 新技術(shù)，從而提出了網(wǎng)絡傳

2、輸?shù)母慕ǚ桨?，此方案中通過增加網(wǎng)絡站點、改造網(wǎng)絡傳輸方式等，對現(xiàn)有網(wǎng)絡進行優(yōu)化與擴充，并考慮了網(wǎng)絡的保護及同步方式，進而提高網(wǎng)絡傳輸?shù)目煽啃?。關(guān)鍵詞：SDH；設備；網(wǎng)絡結(jié)構(gòu)；擴容；復用段保護；通道保護ABSTRACTAlong with the development of communication services, data communication have the new progress in the applicatio

3、n, and the main performance, the number of categories of the broadband adoption rapidly increase, which makes Beijing daxing district existing transmission network can't adapt to this demand, to better satisfy people

4、's needs, there must be a new technology instead of the original technology to realize network interconnection. American bell LABS proposes SDH and gradually become communications field in the world today in transmis

5、sion technology, a development the emergence of SDH hot completely changed the access way optical.This paper in Beijing's daxing district as an example, through investigation of transmission daxing district, and now

6、new technology combining SDH network transmission, thus puts forward the rebuilding scheme, this plan by adding web site, the transformation network transmission mode, etc, to optimize the existing network, and consider

7、and expanded the network's protection and synchronous way, so as to improve the reliability of the network transmission.Key words: SDH; equipment; network structure; dilatation；MSP;PPIII4.2.1 鏈網(wǎng)改造環(huán)網(wǎng)..................

8、..........................................................................................................194.2.2 單向通道環(huán)改雙向復用段環(huán)............................................................................................22

9、4.2.3 復用段環(huán)加新站點擴容 ......................................................................................................244.2.4 擴容后的網(wǎng)絡.......................................................................................

10、.....................................295 SDH 網(wǎng)絡同步原理………………………………………………………. 325.1 網(wǎng)絡同步的必要性 ............................................325.2 SDH 同步定時 .............................................325.3 SDH 網(wǎng)絡的定時方式..........

11、..............................335.4 SDH 網(wǎng)絡同步定時分配結(jié)構(gòu) ..................................345.5 SDH 網(wǎng)絡同步方式.............................................365.6 SDH 網(wǎng)同步基準信號的分配及傳送原則...........................365.7 廊坊 SDH 網(wǎng)絡同步方式 ..