【英文标准名称】:Informationtechnology-FibreDistributedDataInterface(FDDI)-Part5:HybridRingControl(HRC)
【原文标准名称】:信息技术光纤分布式数据接口(FDDI)第5部分:混合环控制(HRC)
【标准号】:ISO/IEC9314-5-1995
【标准状态】:现行
【国别】:国际
【发布日期】:1995-02
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/IECJTC1
【标准类型】:()
【标准水平】:()
【中文主题词】:数据接口;光学纤维;通信规程;数据处理;信息交换;数据传输;控制规程;光波导;光纤排列数据接口;光纤分布数据接口(FIBERDISTRIBUTEDDATAINTERFACE);网络互连;界面;信息技术;接口
【英文主题词】:Communicationprocedures;Controlprocedures;Datainterface;Dataprocessing;Datatransfer;Datatransmission;FDDI;Fibredistributeddatainterface;Fibreoptics;Informationexchange;Informationinterchange;Informationprocessing;Informationtechnology;Interfaces;Interfaces(dataprocessing);Networkinterconnection;Opticalfibres;Opticalwaveguides;Packetswitchingnetworks;Physicallayers
【摘要】:ThispartofISO/IEC9314specifiesahybridringcontrol(HRC)protocolwhichprovidesamodeofoperationinwhichbothpacketswitchedandisochronousdataaretransmittedwithinthesamespecialframestructure,calledacycle.HRCisdesignedtooperatewiththeexistingmediaaccesscontrol(MAC),physicallayer(PHY),andphysicalmediumdependent(PMD)layersoftheFDDIprotocol.TheHRCiscomposedofthehybridmultiplexer(H-MUX)andtheisochronousmediaaccesscontrol(I-MAC)protocols.TheH-MUXintegratespacketandisochronousdataintocycleswhichittransmitsontoandreceivesfromthemediumusingtheservicesofthephysicallayer.TheI-MACprovidesseparatetransmissionchannelsforthetransferofuserisochronousdatastreams.Theformat,clockingandsynchronizationofcycles,andtheoperationandinterfacesoftheH-MUXandI-MACaredefinedbythispartofISO/IEC9314.TheseinterfacesincludetheinterfacetotheFDDIstationmanagement(SMT)protocol.TheHRCisdesignedtosupportvarioustransmissionrates,from100Mbpsupwards,inincrementsof6,144Mbps.AlltransmissionratedependentparametersdefinedinthispartofISO/IEC9314assumeatransmissionrateof100Mbps.StationscomposedofFDDIandHRCentitiesarereferredtoasFDDI-IIstations.TheFDDIpacketMAC(P-MAC)andtheHRCcomponents,andtheirarchitecturalrelationshiptoLLCandacircuitswitchingMultiplexer(CS-MUX)areillustratedinfigure1.ThisfiguredoesnotimplyanimplementationconfigurationFDDI-IInetworksconsistofFDDI-IIstations.InteroperabilitybetweenFDDIandFDDI-IIstationsonthesamenetworkisprovidedinHRCbasicmode,whichonlysupportspackettransmission.ThesetofFDDIstandards,ISO/IEC9314,specifiestheinterfaces,functions,andoperationsnecessarytoensureinteroperabilitybetweenconformingFDDIimplementations.ThispartofISO/IEC9314specifiesahybridringcontrolprotocol:HRC.Conformingimplementationsmayemployanydesigntechniquethatdoesnotviolateinteroperability.
【中国标准分类号】:L78
【国际标准分类号】:33_180_01;35_110
【页数】:108P.;A4
【正文语种】:英语