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1、摘要摘要隨著TD網(wǎng)絡(luò)和集團數(shù)據(jù)網(wǎng)絡(luò)對流媒體業(yè)務(wù)和高速寬帶業(yè)務(wù)的增加,現(xiàn)有傳統(tǒng)的SDH傳輸網(wǎng)絡(luò)容量已不能滿足新增業(yè)務(wù)承載的需求,PTN技術(shù)融合了傳送網(wǎng)和數(shù)據(jù)網(wǎng)絡(luò)的優(yōu)勢,旨在構(gòu)造電信級的面向連接的分組承載網(wǎng)絡(luò),符合運營商網(wǎng)絡(luò)發(fā)展的需求,是3G無線回傳的一個富有競爭力的解決方案。本文致力于研究以PTN技術(shù)做為本地傳輸網(wǎng)絡(luò)優(yōu)化的技術(shù)手段,對本地城域傳送網(wǎng)進行擴容及新建傳輸系統(tǒng),有效地改善本地傳輸網(wǎng)絡(luò)結(jié)構(gòu),提高網(wǎng)絡(luò)對新業(yè)務(wù)的承載能力,加強網(wǎng)絡(luò)運行安全性。本文在簡要介紹引入PTN技術(shù)的背景、必要性及可行性的基礎(chǔ)上,首先對現(xiàn)有本地傳輸網(wǎng)絡(luò)的現(xiàn)狀和存在問題進行了分析與
2、研究,并且討論了本地傳輸網(wǎng)絡(luò)轉(zhuǎn)型的技術(shù)選擇。其次,圍繞承載需求的目標(biāo)進行業(yè)務(wù)電路預(yù)測,根據(jù)傳輸網(wǎng)的結(jié)構(gòu)和層次,分析確定每個層面承載的業(yè)務(wù)類型;據(jù)此分析和預(yù)測相應(yīng)的帶寬需求。根據(jù)電路近期帶寬需求,確定PTN網(wǎng)絡(luò)主要承載業(yè)務(wù)帶寬模型規(guī)劃。然后,定位于傳輸本地網(wǎng)優(yōu)化的重點一城域網(wǎng),明確城域網(wǎng)優(yōu)化的原則、構(gòu)架規(guī)劃、總體策略,確定城域分組傳送網(wǎng)絡(luò)建設(shè)上應(yīng)采用PTN技術(shù)組網(wǎng),按照全程全網(wǎng)的原則整體規(guī)劃,兼顧GSM基站、重要集團客戶和寬帶接入需求。最后,本文完成了一個基于PTN分組傳送技術(shù)的本地傳輸網(wǎng)絡(luò)優(yōu)化實驗,完成PTN系統(tǒng)方案制定、設(shè)備配套安裝、網(wǎng)絡(luò)保護組織性能
3、測試等實際驗證。驗證結(jié)果表明,采用PTN技術(shù)完成城域傳送網(wǎng)核心層和匯聚層傳送網(wǎng)絡(luò)IP化的改造,搭建合理的分組傳送網(wǎng)網(wǎng)絡(luò)架構(gòu),滿足未來2~3年分組業(yè)務(wù)傳送需求。關(guān)鍵詞:分組傳送網(wǎng)(PTN)運行管理維護(OAM)同步傳輸體制(SDH)ABSTRA(了—————————————————————————_———-——_———————————————————————————————————————————一一ABSTRACTWithTDnetworksandgroupsdatanetworkservicesforhi曲-speedbroadbandstreami
4、ngmediabusinessincreased,theexistingtraditionalSDHtransmissionnetworkcapacityCannotmeettheneedsofnewbusinessbearing.PTNtransmissiontechnologycombinestheadvantagesoftransportnetworksanddatanetworkstoConstructionofcarrier-classconnection.orientedoacketbearernetwork,meetthedevelopm
5、entneedsofcarriernetworks.itwillbeacompetitivesolutionfor3Gwirelessbackhaul.Thispapersconcentrates011thestudyofregardingPTNtransmissiontechnologyasthetechnicalmeansofimporvinglocaltransmissionnetwork,toexpandlocalmetrotransportnetworksandcreatenewtransmissionsystem,effectivelyim
6、provethelocaltransportnetwork,improvenetworkcarryingcapacityofthenewbusiness,strengthentheoperationofthenetworksecurity.Thispapersfirstlystudiesandanalysistheexistingsituationandproblemsoflocaltransmissionnetwork,anddiscussthenetworktransformationoflocaltransmissiontechnologyofc
7、hoice.,basedonthebrieflyintroductionofthebackground,necessity,andfeasibilityofPTNtechnology.Secondly,analysistodeterminethetypeofbusinessateverylevel,carryingaroundthecircuitdemandforecastbusinessobjectivesandaccordingtothestructureandleveloftransmissionnetwork;thenaccordinglyan
8、alysisandpredictthecorrespondingbandwidthrequir