G.709中文翻译学习

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1、1ScopeTheopticaltransporthierarchy(OTH)supportstheoperationandmanagementaspectsofopticalnetworksofvariousarchitectures,e.g.,point-to-point,ringandmesharchitectures.ThisRecommendationdefinestheinterfacesoftheopticaltransportnetworktobeusedwithinandbetweensubnetworksoftheo

2、pticalnetwork,intermsof:–opticaltransporthierarchy(OTH)–functionalityoftheoverheadinsupportofmulti-wavelengthopticalnetworks–framestructures–bitrates–formatsformappingclientsignals.光传送体系（OTH）支持不同架构的光网络的运营和管理，例如，点对点，环形和网状架构。该协议依据如下维度定义了光网络的接口的标准，该接口用于光网络子网内部及子网之间的通信。-光传送体

3、系（OTH）-支持多波光网络的开销的功能-帧结构-Bit率-客户信号映射格式TheinterfacesdefinedinthisRecommendationcanbeappliedatuser-to-networkinterfaces(UNI)andnetworknodeinterfaces(NNI)oftheopticaltransportnetwork.Itisrecognized,forinterfacesusedwithinopticalsubnetworks,thataspectsoftheinterfaceareoptica

4、ltechnologydependentandsubjecttochangeastechnologyprogresses.Therefore,opticaltechnologydependentaspects(fortransversecompatibility)arenotdefinedfortheseinterfacestoallowfortechnologychanges.Theoverheadfunctionalitynecessaryforoperationsandmanagementofopticalsubnetworksi

5、sdefined.协议定义的接口，可以应用于光传送网络的用户网络接口（UNI）和网络节点接口（NNI）。对于光网络的子网的接口应用，某些方面是受限于科技进步的。所以，依赖于光科技的方面（横向兼容方面）是没有被定义的，从而允许随着科技进步进行改变。光网络子网操作及管理需要的开销功能同样被定义。ThesecondrevisionofthisRecommendationintroduced:–supportforanextended(unlimited)setofconstantbitrateclientsignals;–aflexibleO

6、DUk,whichcanhaveanybitrateandabit-ratetoleranceupto±100ppm;–aclient/serverindependentgenericmappingproceduretomapaclientsignalintothepayloadofanOPUk,ortomapanODUjsignalintothepayloadofoneormoretributaryslotsinanOPUk;–ODUkdelaymeasurementcapability.第二次修订的协议介绍了：-支持一种扩展的CBR

7、客户信号；-ODUkflex，可以是任意bit率，bit率最大容忍±100ppm；-一种客户层与服务层独立的通用映射（GMP）步骤，将客户信号映射到OPUk的净和区，或者将一个ODUj信号映射到一个OPUk的一个或多个时隙的净和区；-ODUk的延迟测量能力。ThethirdrevisionofthisRecommendationintroducesthetextofAmendments1and2,Corrigendum1andErratum1toRecommendationITU-TG.709/Y.1331(2009)andsuppor

8、tformoreclientsignals.第三次修订的协议将修订1和2的文本，勘误表1和勘误1合入协议ITU-TG.709/Y.1331(2009)，并支持更多的客户侧信号。2ReferencesThef