IEEE-std-1588-2008

IEEEStd1588™-2008(RevisionofIEEEStd1588-2002)IEEEStandardforaPrecisionClockSynchronizationProtocolforNetworkedMeasurementandControlSystemsIEEE3ParkAvenueNewYork,NY10016-5997,USA24July2008IEEEInstrumentationandMeasurementSocietySponsoredbytheTechnicalCommitteeonSensorTechnology(TC-9)1588TMAuthorizedlicenseduselimitedto:SOUTHCHINAUNIVERSITYOFTECHNOLOGY.DownloadedonApril25,2013at02:41:59UTCfromIEEEXplore.Restrictionsapply.Authorizedlicenseduselimitedto:SOUTHCHINAUNIVERSITYOFTECHNOLOGY.DownloadedonApril25,2013at02:41:59UTCfromIEEEXplore.Restrictionsapply.IEEEStd1588TM-2008(RevisionofIEEEStd1588-2002)IEEEStandardforaPrecisionClockSynchronizationProtocolforNetworkedMeasurementandControlSystemsSponsorTechnicalCommitteeonSensorTechnology(TC-9)oftheIEEEInstrumentationandMeasurementSocietyApproved27March2008IEEE-SAStandardsBoardAuthorizedlicenseduselimitedto:SOUTHCHINAUNIVERSITYOFTECHNOLOGY.DownloadedonApril25,2013at02:41:59UTCfromIEEEXplore.Restrictionsapply.Abstract:Aprotocolisprovidedinthisstandardthatenablesprecisesynchronizationofclocksinmeasurementandcontrolsystemsimplementedwithtechnologiessuchasnetworkcommunication,localcomputing,anddistributedobjects.Theprotocolisapplicabletosystemscommunicatingviapacketnetworks.Heterogeneoussystemsareenabledthatincludeclocksofvariousinherentprecision,resolution,andstabilitytosynchronize.System-widesynchronizationaccuracyandprecisioninthesub-microsecondrangearesupportedwithminimalnetworkandlocalclockcomputingresources.Simplesystemsareinstalledandoperatedwithoutrequiringthemanagementattentionofusersbecausethedefaultbehavioroftheprotocolallowsforit.Keywords:boundaryclock,clock,distributedsystem,masterclock,measurementandcontrolsystem,real-timeclock,synchronizedclock,transparentclock•TheInstituteofElectricalandElectronicsEngineers,Inc.3ParkAvenue,NewYork,NY10016-5997,USACopyright©2008bytheInstituteofElectricalandElectronicsEngineers,Inc.Allrightsreserved.Published24July2008.PrintedintheUnitedStatesofAmerica.IEEEand802areregisteredtrademarksintheU.S.Patent&TrademarkOffice,ownedbytheInstituteofElectricalandElectronicsEngineers,Incorporated.DeviceNetisatrademarkintheU.S.Patent&TrademarkOffice,ownedbytheOpenDeviceNetVendorAssociation,Incorporated.ControlNetisatrademarkintheU.S.Patent&TrademarkOffice,ownedbytheControlNetInternational,Ltd.PROFIBUSandPROFINETaretrademarksintheU.S.Patent&TrademarkOffice,ownedbyPROFIBUSNutzerorganisatione.V.(PNO).PDF:ISBN978-0-7381-5400-8STD95773Print:ISBN978-0-7381-5401-5STDPD95773Nopartofthispublicationmaybereproducedinanyform,inanelectronicretrievalsystemorotherwise,withoutthepriorwrittenpermissionofthepublisher.Authorizedlicenseduselimitedto:SOUTHCHINAUNIVERSITYOFTECHNOLOGY.DownloadedonApril25,2013at02:41:59UTCfromIEEEXplore.Restrictionsapply.IEEEStandardsdocumentsaredevelopedwithintheIEEESocietiesandtheStandardsCoordinatingCommitteesoftheIEEEStandardsAssociation(IEEE-SA)StandardsBoard.TheIEEEdevelopsitsstandardsthroughaconsensusdevelopmentprocess,approvedbytheAmericanNationalStandardsInstitute,whichbringstogethervolunteersrepresentingvariedviewpointsandintereststoachievethefinalproduct.VolunteersarenotnecessarilymembersoftheInstituteandservewithoutcompensation.WhiletheIEEEadministerstheprocessandestablishesrulestopromotefairnessintheconsensusdevelopmentprocess,theIEEEdoesnotindependentlyevaluate,test,orverifytheaccuracyofanyoftheinformationcontainedinitsstandards.UseofanIEEEStandardiswhollyvoluntary.TheIEEEdisclaimsliabilityforanypersonalinjury,propertyorotherdamage,ofanynaturewhatsoever,whetherspecial,indirect,consequential,orcompensatory,directlyorindirectlyresultingfromthepublication,useof,orrelianceuponthis,oranyotherIEEEStandarddocument.TheIEEEdoesnotwarrantorrepresenttheaccuracyorcontentofthematerialcontainedherein,andexpresslydisclaimsanyexpressorimpliedwarranty,includinganyimpliedwarrantyofmerchantabilityorfitnessforaspecificpurpose,orthattheuseofthematerialcontainedhereinisfreefrompatentinfringement.IEEEStandardsdocumentsaresupplied“ASIS.”TheexistenceofanIEEEStandarddoesnotimplythattherearenootherwaystoproduce,test,measure,purchase,market,orprovideothergoodsandservicesrelatedtothescopeoftheIEEEStandard.Furthermore,theviewpointexpressedatthetimeastandardisapprovedandissuedissubjecttochangebroughtaboutthroughdevelopmentsinthestateoftheartandcommentsreceivedfromusersofthestandard.EveryIEEEStandardissubjectedtoreviewatleasteveryfiveyearsforrevisionorreaffirmation.Whenadocumentismorethanfiveyearsoldandhasnotbeenreaffirmed,itisreasonabletoconcludethatitscontents,althoughstillofsomevalue,donotwhollyreflectthepresentstateoftheart.UsersarecautionedtochecktodeterminethattheyhavethelatesteditionofanyIEEEStandard.Inpublishingandmakingthisdocumentavailable,theIEEEisnotsuggestingorrenderingprofessionalorotherservicesfor,oronbehalfof,anypersonorentity.NoristheIEEEundertakingtoperformanydutyowedbyanyotherpersonorentitytoanother.Anypersonutilizingthis,andanyotherIEEEStandardsdocument,shouldrelyupontheadviceofacompetentprofessionalindeterminingtheexerciseof