廊坊市sdh傳輸網(wǎng)擴(kuò)容畢業(yè)設(shè)計(jì)定稿

1、I摘 要隨著通信業(yè)務(wù)的發(fā)展，數(shù)據(jù)通信也有了新的進(jìn)步，其主要表現(xiàn)在應(yīng)用種類(lèi)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(luò)無(wú)法適應(yīng)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(shí)現(xiàn)網(wǎng)絡(luò)的互聯(lián)。美國(guó)貝爾實(shí)驗(yàn)室提出了 SDH 并逐步成為當(dāng)今世界通信領(lǐng)域在傳輸技術(shù)方面的一個(gè)發(fā)展熱點(diǎn)，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(guò)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(luò)傳

2、輸?shù)母慕ǚ桨?，此方案中通過(guò)增加網(wǎng)絡(luò)站點(diǎn)、改造網(wǎng)絡(luò)傳輸方式等，對(duì)現(xiàn)有網(wǎng)絡(luò)進(jìn)行優(yōu)化與擴(kuò)充，并考慮了網(wǎng)絡(luò)的保護(hù)及同步方式，進(jìn)而提高網(wǎng)絡(luò)傳輸?shù)目煽啃?。關(guān)鍵詞：SDH；設(shè)備；網(wǎng)絡(luò)結(jié)構(gòu)；擴(kuò)容；復(fù)用段保護(hù)；通道保護(hù)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(fù)用段環(huán)............................................................................................22

9、4.2.3 復(fù)用段環(huán)加新站點(diǎn)擴(kuò)容 ......................................................................................................244.2.4 擴(kuò)容后的網(wǎng)絡(luò).......................................................................................

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

11、..............................335.4 SDH 網(wǎng)絡(luò)同步定時(shí)分配結(jié)構(gòu) ..................................345.5 SDH 網(wǎng)絡(luò)同步方式.............................................365.6 SDH 網(wǎng)同步基準(zhǔn)信號(hào)的分配及傳送原則...........................365.7 廊坊 SDH 網(wǎng)絡(luò)同步方式 ..