ISO IEC 0439682023.docx

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1、INTERNATIONA1.STANDARDISO/IEC4396-8editionFirSt202312Te1.ecommunicationsandinformationexchangebetweensystemsRecursiveinter-networkarchitecture一pfgenera1.de1.imitingproceduresTd整communicationse1.changed,inbrmationen1.resystmes一Architecturerecursiveinterrseaux-Partie8:Proceduresgenera1.esdede1.imitati

2、onRINAReferencenumberISO/IEC4396-8:2023(E)ISO/IEC2023COPYRIGHTPROTECTEDDOCUMENTISO/1EC2023IUirhM*hedbdi1.iUedotherwiseupdhi.or啪UIBndttaeDmkfifiU81.andonnet8CH-1214Vernier,GenevaPhone：M1.22749O1.11觥ftte:丽丽BQrgPub1.ishedinSwitzer1.andContentsforewordNormativereferences1Terinsaiiddefinitions1Detai1.edS

3、necificatinnnfthenrnct*c1.re4.1Genera1.14.3Procedure一.ForewordISO(theInternationa1.OrganizationforStandardization)andIEC(theInternationa1.E1.ectrotechnica1.(inrt)(55io6)SrnIHGspartHipidisye耐IuAwHopWwiif1.MHtdiKtandhaiion.SttindddtghtechniMbcommitteesestab1.ishedbytherespectiveorganizationtodea1.with

4、particu1.arfie1.dsoftechnica1.activity.ISOandIECmitteesco1.1.aborateinfie1.dsofmutua1.interestOtherinternationa1.ornizations,governmenta1.andnon-governmenta1.rin1.iaisonwithISOandIEC,a1.sotakepartintheTheproceduresusedtodeve1.opthisdocumentandthoseintendedforitsfurthermaintenanceMdcddc抑IbCdthe1.ndfr

5、cnt1.S(W拒矫也帼rtsK1.AnAWftIMarj帕由的脚也加些一3口册酶旬IiWnaccordancewiththeeditoria1.ru1.esoftheISO/IECDirectives.Part2(seewww.iso.org/dircctivesorwww.iec.ch/members.experts/refdocs).屣Gd（八）IEC0雁Yn囹*闸曲锄段粒SSibA哂Atef1.WferninM曲ICnMi曲剑豳由花出M1.?N(Q即肥abihiytheanyc1.aimedpatentrightsinrespectthereof.Asofthedateofpub1.i

6、cationofthisdocument,ISOandIEChadnotreceivednoticeof（八）patent(三)whichmayberequiredtoimp1.ementthisdocument.However,曲觎eda祜Ww11三gpMs电铝VW踪忸Mtq据notbehe1.dresponsib1.eforidentifyinganyora1.1.suchpatentrights.Anytradeusedinthisconstitutenameendorsementdocumentisinformationgivenfortheconvenienceofusersandd

7、oesnotForanexp1.anationofthevo1.untarynatureofstandards,themeaningofISOspecifictermsand邮)X觑怂1.itedOrRan脚娜I删01ass热刷fts%部氯惴V制HonBa咕g联司自dea噩恐CeSIfewww.iso.org/iso/foreword.htm1.IntheIEC,seevrww.iec.chunderstanding-standards.瓢尔御ftWsd独网寤腕忧规B!砌然。叫科皿.僧fi憎浦O/啜觇集ms如TnaaS丽。/切,A1.istofa1.1.partsintheISO/IEC439

8、6seriescanbefoundontheISOandIECwebsites.t1.f1.ify.fcA1.backcoWp1.ete1.ftftfctbthcs(fbV6hfiSft08加中的rcctedwv4SC?tiftfteRhUHJstandardswww.iec.ch/nationa1.-committees.Te1.ecommunicationsandinformationexchangebetweensystemsRecursiveinter-networkarchitecture一RINAgenera1.de1.imitingprocedures1 Scopeamountt

9、heamounttodatapeer.passednecessary1.ayerBoundarydOCUmentProtocoIPDIJcarriesprecise1.yone2 Normativereferencesconstitutesrequirements1.atestCditiondoCUmCnt.referencedreferences,(inc1.udingamendments)app1.ies.app1.ies.ArchitecturePart1:ReferenceMode1.3 TermsanddefinitionsISOandIECmaintaintermino1.ogyd

10、atabasesforuseinstandardizationatthefo1.1.owingaddresses:Detai1.edspecicationoftheprocedure4.1 Gp1.ete,incomp1.ete,Createpartia1.SD1.Jsforoutput,dependingPartia1.qua1.ityde1.iveryserviceWho1.cparamc1.ers.rangeconcatenationoptions,simu1.taneous1.y.Ita1.soprovidcsconcatenationinformationneededfragment

11、ationPbinationsoffie1.dtwo.EFcPUserTransfcrFie1.dSyntaxcontainSDUfragments,entireSDUs1.orprescribed1Thisdocumentprovidesade1.imitingmodu1.ethatdefinesamechanismforencodingServiceDataUnits(SDUs),ofdatasentofitsItisnotacrossthetousethiswithinifeachDataUnits(PDUs),theSDU.Thefo1.1.owingdomentsarereferre

12、dtointhetextinsuchawaythatsomeora1.1.oftheircontentundatedreferences,theofthisoftheFordateddocumenton1.ytheanyeditioncitedForISO43961,Te1.ecommunicationsandmformaUonexchangebetweensystems-RecursiveInter-NetworkForthepurposesofthisdocument,thetermsanddefinitionsgiveninISO4396-1app1.y.ISOOn1.inebrowsi

13、ngp1.atform:avai1.ab1.eathttps:/www.iso.org/obp4IECE1.ectropedia:avai1.ab1.ehttps:/www.e1.ectropedia.org/Thede1.imitingmodu1.eproducesoninput,oneormoreUser-Datafie1.dsforthee11orandf1.owcontro1.protoco1.(EFCP)orPD1.Js;andontheuserofthef1.ow.onofrefersto(QoS)SDUsthatarede1.iveredincrementa1.1.y,whi1.

14、eincomp1.etede1.iveryreferstoanSDUthatcanhavepiecesmissing.Thisimp1.iesthatpartia1.de1.iveryOfincomp1.eteSDUsispossib1.e.Thedescribedmechanismcoversaandofpo1.icyofSDUsaIIowingfragmentationofSDUs,additiona1.SDUs,andbothde1.iverydespitegapsintheSDUstream,ifde1.iveryacrossagapispermittedbytheQoS-cubefo

15、rthef1.ow.Thede1.imitingpo1.icymaybedifferentbetweenQoS-cubes.Thismodu1.ecanbeusedwithsevera1.QoS-abes4.2SyntaxDataPDUmayis:TheUserDatatheOfanThe:=VmidFragmentVtirStFragment:=()*VuSerDataFie1.d:=VSDUDe1.imiterF1.agsThissyntaxhasthefo1.1.owingproperties:TheSDuSequcnceNunibermayormaynotbepresentintheP

16、DU.ThesyntaxofPDUdatapermitsthe1.engthfie1.dtobeomittedifthePDUcontainsasing1.eSDUorfragment.TheSDIJDeIimiterFIagsfie1.ddescribedbe1.owdeterminesthetypeoftheDatacontentinthiscase.IfmorethanoneSDUorfragmentispresent,the1.engthfie1.dsinconjunctionwiththeSDUDeIimiterFIagsfie1.ddescribedbe1.owsha1.1.beu

17、sedtoparsethePDUdataintoitscomponentfragmentsorSDUs.SDUDeIimiterFIags:1ByteX-SDUSeqUenCeNUHBVPP函际枷OIIe)S,swh由与积陋*F1.agsSI)f用由i1.H做削9衣V确icatesfr8研4torSDUdata.Q带fie1.ddefinethePDUDatasyntaxusedtoencodethe04X-no1.ength,indicateswhetherthePDUcontainsexact1.yonefragmentorSDUandthatthe1gth/RM榔a椭三斓陲W麻曲缶Wpr

18、搦UMP靠g阚“rpreFMnderfo1.1.ows:1.(JbTn1VWisPDU.datacontainsacontinuation(midFragment),thatis,anSDUneitherbeginsnor,OB-ThePDUdatacontainsthefirstfragment(RrstFragment)ofthenextSDUinsequence.10B-ThePDUdatacontainsthefina1.fragment(IastFragment)ofanSDU,comp1.etingit.*1B-ThePDUdatacontainsonecomp1.eteSDU.f

19、io1.(h1.ovvA5rRKfiitrftDctedccd(ows:DatafragmentorSDUinthePDUDatafie1.d,*00,B-ThePDUdatacontainszeroormorecomp1.eteSDUs.,OB-ThePDUdatacontainszeroormorecomp1.eteSDUs,fo1.1.owedbyafirstFragment10B-ThePDUdatacontainsaIastFragment,fo1.1.owedbyzeroormorecomp1.eteSDUs.ah1.Fr9hVit.datacontainsaIastFragmen

20、t,fo1.1.owedbyzeroormorecomp1.eteSDUs,fo1.1.owedbyThehighorder4bitsoftheSDUDeIimiterF1.agsfie1.dsha1.1.be0.Data:avariab1.enumberofdatabytes:ThecontentportionofanSDUorfragmentofanSDU.1.ength:SDUFrag1.en-Thisfie1.dcontainsthe1.engthoftheData(SDUorfragmentofanSDU)fo1.1.owingitthatisbeingde1.imited.Itis

21、anerrorifthePDUdatafie1.dcontainsanincomp1.ete1.engthe1.d.Itisfragments.anerrorifthePDUDatafie1.disnotexact1.yconsumedbythede1.imitedSDUsand/orSDUSequenccNurnber:ScqNurn1.enfirstprcsen1.rfragmentDatauscdSDUindicateprescntSDUsequence4.3ProcedurePDUwiththepreviousPDUsequencenumber.immediate1.yfo1.1.ow

22、edthisf1.owSDUDe1.imiterF1.agsfragmentation.describingconcatenation,fragment(三)and/orSDU(三)are no1.engthf1.agSDuDe1.imiterFiagssDUDeIimiterF1.agsadditionaIinformationneededistoproper1.yidentify no1.ength*SDUFrag1.enwbytes,immediate1.yprecedingPDUsequenceofdatabytes1.engththeindicatedadditiona1.infor

23、mationthatneededPDUcorrect1.yencoded.TheSDuDe1.imiterFIagscompIeteprovidesthe fie1.dsequencenumber:WhensequenceSDuSequenceNumberPresentf1.agfirstSDUDeIimiterFIagsSDUDeIimiterFIagsasspecifiedabove.knowthecases.sequencenumber(三)numberSDU(三)exp1.icit1.yencodedcaseWherePDUifQoSisimportanttoappropriate.i

24、ncomp1.eteSDUapp1.icationde1.ivered.indicatedthatpartia1.orincomp1.etede1.iveryisa1.1.owed,amaximum1.engthf1.ow,SDUpermittedpreserveddeterminedbypo1.icydestinationparameterapp1.ication.TheencodedthisDe1.imitingfieIdSpecificationdefined1.engthofanSDUorfragmentsha1.1.beab1.etobeva1.idatestarting1.engt

25、hsinare1.ist/arrayencodedside-effectoftheva1.idation.portion.andsimp1.ifiesSDUDdimiterF1.agsprocessing.ReccivingsystemsfZero-IcngthSDUwi1.itheinterpretedconscquenceendoffi1.eIndicationHowevenmanyinterpretationofthethatcontainsthe-Ifbyteofthisfie1.disortoDatatheinthePDU.Thesequencenumbersofanyadditio

26、na1.SDUsorfragmentsinthePDU,ifany,canhetrivia1.1.ydeduced.ItisanerroriftheprovidedSDUSequenceNumberdoesnotmatchtheexpectedva1.uebasedontheContentoftheIftheQoS-cubeforbyanimp1.ementsfie1.dhoworboth,theEFCPPCIisencodedinthePDUDatafie1.d.TheSDUDeIimiterFiagsdescribethesyntaxoftheencoding.Datafie1.d,the

27、set:Whentheprovidesthefie1.dindicatesthat1.engthpresentinthePDUthesing1.eDatab1.ockoccupyingtheremainderofthePDUasanSD1.Jorfragmentandifafragment,howtoassociateitwiththeproperSDU.of1.engthf1.agc1.ear:W1.ienany1.engthispresenttheaDatafie1.d,anysuchofisinteger1.ength.Notethatitisnecessarytoexamineintu

28、rneachpairpresentinthePDUDatafie1.dtoproper1.yparsethecontentofthePDUDatafie1.dintoitscomponentfragment(三)and/orSDU(三)andverifythetoisidentifyeachDatab1.ockasfragmentorthenSDU,andifafragmenthowtoassociateitwiththeproperSDU.SDUindicatesthattheSDUset(I)1theofthecontainingtheinthebyteofintheUserDatafie

29、1.dispresentimmediate1.yfo1.1.owingtheSDUDc1.imiterFiagsfie1.d,inaHe1.dof1.engthSequenceNumber1.engthbytes.TheremainderoftheUserDataisencodedaccordingtotheIftheQoScubeenab1.esfragmentation,concatenation,orboth,thentheSDUsequencenumberandthePDUsequencenumbermaybeunequa1.Theywi1.1.on1.ybeequa1.when1SD

30、Uisa1.waysmappedto1PDU.InsuchSDUtheSDUsequenceofthesha1.1.beinthePDU.Intheintothetheitcubespecifiesanon-zero1.non-infiniteSDUgapfitisnecessarytoknowtheSDUsequencenumberofanSDUstarting(andpossib1.ycomp1.eting)inaPDUinordertodeterminewhetherde1.iveryoftheSDUtotheapp1.icationispartia1.Whenthemaybehas M

31、inimumandmaximumSDU1.ength：The1.engthandcontentsofanSDUaresetwhenitiscreatedbytheuserofanandbothareonaowiSthroughde1.iverytotheOftheDandiffragmentationisenab1.edforthef1.ow,maybe1.argerthanasing1.emaximum-1.engthPDUcancarry.Theminimum1.engthofanSDUiszerodatabytes.Theon1.ymaximum-SDU-1.engthrestricti

32、onmadebyinthe1.engthencodedasisthattheabove.Imp1.ementationnote1:ThesuggestedparsingapproachofaPDUdatafie1.dwith1.engthspresentistosavingtheirthata1.1.pointsandpairsva1.id1.yasaandexact1.yfitthePDUThen,theSDUDeIimiterFIagscanbeeasi1.yconsu1.tedtoidentifyanyfirstfragment,SDUs,and1.astfragmentinthearr

33、ay.Thisorderhe1.psavoidcommittinganyactionbeforetheva1.idityofthePDUhasbeenestab1.ishedImp1.ementationnote2:Byconventioninsomeoperatingsystems,inc1.udingUNIX-derivedoperatingsystems,azero-1.engthdatareturnfromareadoperationisofteninterpretedasanend-of-f1.eindication.thoseawhichmaynotbebeasansendingo

34、ne.bythatapp1.icationsisanapp1.icationchoice-thenetworkmakesnosuchassumption.Providedthattheapp1.icationsatbothdndHiMRJtiontoofaHo0HiHCuINonthmin)trmkt11Bih6E1.XbntpafiitadiSfcghey1.PiugiaeBSjOnYp1.yiAJ1.(atu1.y,theapp1.icationscanexchangeapp1.ication-1.eve1.protoco1.informationwithinthef1.owtoindicatewhenthedatatransferiscomp1.eteandthef1.owcanbedea1.1.ocated,openingthepossibi1.ityofexchangingzero-1.engthSDUsonthef1.owifthatisdeemedusefu1.ICS35.100.30