廊坊市sdh傳輸網(wǎng)擴容畢業(yè)設(shè)計定稿

1、I摘要隨著通信業(yè)務(wù)的發(fā)展，數(shù)據(jù)通信也有了新的進步，其主要表現(xiàn)在應(yīng)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(luò)無法適應(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)，實現(xiàn)網(wǎng)絡(luò)的互聯(lián)。美國貝爾實驗室提出了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(luò)傳輸?shù)母慕ǚ桨福?/p>

2、此方案中通過增加網(wǎng)絡(luò)站點、改造網(wǎng)絡(luò)傳輸方式等，對現(xiàn)有網(wǎng)絡(luò)進行優(yōu)化與擴充，并考慮了網(wǎng)絡(luò)的保護及同步方式，進而提高網(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)；擴容；復(fù)用段保護；通道保護ABSTRACTAlongwiththedevelopmentofcommunicationservicesdatacommunicationhavethenewprogressintheapplicationthemainperfmancethenum

3、berofcategiesofthebroadbadoptionrapidlyincreasewhichmakesBeijingdaxingdistrictexistingtransmissionwkcantadapttothisdemtobettersatisfypeoplesneedstheremustbeanewtechnologyinsteadoftheiginaltechnologytorealizewkinterconnec

4、tion.AmericanbellLABSproposesSDHgraduallybecomecommunicationsfieldinthewldtodayintransmissiontechnologyadevelopmenttheemergenceofSDHhotcompletelychangedtheaccesswayoptical.ThispaperinBeijingsdaxingdistrictasanexamplethro

5、ughinvestigationoftransmissiondaxingdistrictnownewtechnologycombiningSDHwktransmissionthusputsfwardtherebuildingschemethisplanbyaddingwebsitethetransfmationwktransmissionmodeetctooptimizetheexistingwkconsiderexpedthewksp

6、rotectionsynchronouswaysoastoimprovethereliabilityofthewktransmission.Keywds:SDHequipmentwkstructuredilatation；MSPPPIII4.2.1鏈網(wǎng)改造環(huán)網(wǎng)..........................................................................................

7、..................................194.2.2單向通道環(huán)改雙向復(fù)用段環(huán)............................................................................................224.2.3復(fù)用段環(huán)加新站點擴容..........................................................

8、............................................244.2.4擴容后的網(wǎng)絡(luò)............................................................................................................................295SDH網(wǎng)絡(luò)同步原理……………………………………………………….325.1

9、網(wǎng)絡(luò)同步的必要性............................................325.2SDH同步定時.............................................325.3SDH網(wǎng)絡(luò)的定時方式........................................335.4SDH網(wǎng)絡(luò)同步定時分配結(jié)構(gòu)..................................345.

10、5SDH網(wǎng)絡(luò)同步方式.............................................365.6SDH網(wǎng)同步基準信號的分配及傳送原則...........................365.7廊坊SDH網(wǎng)絡(luò)同步方式........................................376方案的評估與論證…………….…………………………………………38致謝：………………………………………………………