22090225000000proposedtextforsection6178Word文档下载推荐.docx
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Abstract
Thisdocumentrepresentstheproposededitstothetextforsections6.17.8through6.17.13ofDraftv2.0toresolvecomment402.
Notice:
ThisdocumenthasbeenpreparedtoassistIEEE802.22.Itisofferedasabasisfordiscussionandisnotbindingonthecontributingindividual(s)ororganization(s).Thematerialinthisdocumentissubjecttochangeinformandcontentafterfurtherstudy.Thecontributor(s)reserve(s)therighttoadd,amendorwithdrawmaterialcontainedherein.
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andattheIEEE’ssolediscretiontopermitotherstoreproduceinwholeorinparttheresultingIEEEStandardspublication.ThecontributoralsoacknowledgesandacceptsthatthiscontributionmaybemadepublicbyIEEE802.22.
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ThecontributorisfamiliarwiththeIEEE802PatentPolicyandProcedures
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includingthestatement"
IEEEstandardsmayincludetheknownuseofpatent(s),includingpatentapplications,providedtheIEEEreceivesassurancefromthepatentholderorapplicantwithrespecttopatentsessentialforcompliancewithbothmandatoryandoptionalportionsofthestandard."
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.
BSTransmitChannelSetstoCPE
TheBSshallsendthechannelsetstothenewCPE.ThechannelsetsaredescribedinError!
Referencesourcenotfound..ThechannelsetsthataresenttotheinitializingCPEarethebackupchannelsandthecandidatechannels.ThechannelsetsaresentinaDCDmessage,asdescribedinError!
Referencesourcenotfound.andinError!
Referencesourcenotfound.toError!
Referencesourcenotfound..TheBSshallsendDCDchannelinformationelements11and12.Error!
Referencesourcenotfound.describesinformationelement12asthebackupandcandidatechannellist.Itisaprioritizedlistofthechannelswiththebackupchannelsethigherinprioritythanthecandidatechannelset.Thetwosetsareidentifiedbysendinginformationelement11whichprovidesthenumberofthehigherprioritizedbackupchannelset.EachchannelinDCDinformationelement12ischaracterizedbyboththechannelnumber.
Registration
RegistrationistheprocessbywhichtheCPEisallowedentryintothenetworkandamanagedCPEreceivesitsSecondaryManagementCIDandthusbecomesmanageable.ToregisterwithaBS,theCPEshallsendaREG-REQmessagetotheBS.TheBSshallrespondwithaREG-RSPmessage.TheREG-RSPmessageshallincludetheSecondaryManagementCID.
Figure49showstheprocedurethatshallbefollowedbytheCPE.
CPERegistration
OncetheCPEhassentaREG-REQtotheBS,itshallwaitforaREG-RSPtoauthorizeittoforwardtraffictothenetwork.Figure50showsthewaitingprocedurethatshallbefollowedbytheCPE.
WaitforREG-RSP—CPE[TheManagedCPE?
conditionalblockinthediagramneedstoberemovedsinceallCPEsaremanaged.]
TheBSshallperformtheoperationsshowninFigure51.NotethattheTimerT13representsthetimeallowedforaCPE,followingreceiptofaREG-RSPmessage,tosendaTFTP-CPLTmessagetotheBS,anditsminimumtimeisspecifiedinError!
Referencesourcenotfound..Inaddition,theTimerT28isthetimeallowedfortheBStocompletethetransmissionofchannelsets,itsdefaultvalueisspecifiedinError!
Referencesourcenotfound..
RegistrationatBS[TheManagedCPE?
IPVersionNegotiation
TheCPEmayincludetheIPversionparameter(Error!
Referencesourcenotfound.)intheREG-REQmessagetoindicatewhichversionsofIPitsupportsontheSecondaryManagementConnection.WhenpresentintheREG-REQmessage,theBSshallincludethisIPversionparameterintheREG-RSPmessagetocommandtheCPEtousetheindicatedversionofIPonthesecondarymanagementconnection.TheBSshallcommandtheuseofexactlyoneoftheIPversionssupportedbytheCPE.
TheomissionoftheIPVersionParameterintheREG-REQmessageshallbeinterpretedasIPv4supportonly.Consequently,theomissionoftheIPVersionParameterintheREG-RSPmessageshallbeinterpretedasacommandtouseIPv4onthesecondarymanagementconnection.
EstablishIPconnectivity
TheCPEshallinvokeDHCPmechanism[IETFRFC2131]inordertoobtainanIPaddressandanyotherparametersneededtoestablishIPconnectivity.IftheCPEhasaconfigurationfile,theDHCPresponseshallcontainthenameofafilethatcontainsfurtherconfigurationparameters.
EstablishmentofIPconnectivityshallbeperformedontheCPE’ssecondarymanagementconnectionasshownin6.17.8.
EstablishingIPconnectivity
IncasewheredynamicIPconfigurationisnotpreferred,theCPEshallobtainanIPaddressfromitsbasestation.
EstablishTimeofDay
TheCPEandBSshallhavethecurrentdateandtime.Thisisrequiredfortime-stampingloggedeventsforretrievalbythemanagementsystem.Thisneedsnotbeauthenticatedandshallbeaccuratetothenearestsecond.
TheprotocolbywhichthetimeofdayshallberetrievedisdefinedinIETFRFC868.Referringto6.17.8,therequestandresponseshallbetransferredusinguserdatagramprotocol(UDP).Thetimeretrievedfromtheserver[universalcoordinatedtime(UTC)]shallbecombinedwiththetimeoffsetreceivedfromtheresponseoftheCPEtocreatethecurrentlocaltime.EstablishmentoftimeofdayshallbeperformedontheCPE’ssecondarymanagementconnection.
Establishingtimeofday
SuccessfullyacquiringtheTimeofDayisnotmandatoryforasuccessfulregistration,butisnecessaryforongoingoperation.ThespecifictimeoutforTimeofDayRequestsisimplementationdependent.
TransferOperationalParameters
TheCPEshalldownloadtheCPE’sconfigurationfileusingTFTPonitsownsecondarymanagementconnectionasshownin6.17.8.TheCPEshalluseanadaptivetimeoutforTFTPbasedonbinaryexponentialbackoff[IETFRFC1123,IETFRFC2349].
Transferringoperationalparameters
Whentheconfigurationfiledownloadhascompletedsuccessfully,theCPEshallnotifytheBSbytransmittingtheTFTP-CPLTmessageontheCPE’sprimarymanagementconnection.TransmissionsshallcontinuesuccessfullyuntilaTFTP-RSPmessageisreceivedwithresponse“OK”fromtheBS(seeFigure55andFigure56)ortheCPEterminatesretransmissionduetoretryexhaustion.
SecondaryManagementConnection
UponsendingaREG-RSP,theBSshallwaitforaTFTP-CPLT.IfthetimerT13(definedinError!
Referencesourcenotfound.)expires,theBSshallbothdeassignthemanagementCIDsfromthatCPEandmakesomeprovisionforagingoutthoseCIDs(seeFigure55andFigure56).NotethattheTimerT26referstothetimewaitedforTFTP-RS,anditsmaximumandminimumvaluesaredefinedinError!
WaitforTFTP-CPLTattheBS
WaitforTFTP-RSPattheCPE
NeighboringNetworkDiscovery
AfteraCPEhasregisteredwithaWRANBS,itshallperformneighboringnetworkdiscoveryinordertoidentifyothernearbyWRANsandenableefficientself-coexistence,iftheCPEhasnotalreadydoneso.TheneighboringnetworkdiscoveryinvolveslisteningtothemediumforCBPpacketsorBSSCHtransmittedbyotherWRANBSs.ThisnetworkdiscoverymechanismisdescribedinError!
a.
b.
c.
SetUpConnections
AfterthetransferofoperationalparametersforthemanagedCPE,theBSshallsendDSA-REQmessages(Error!
Referencesourcenotfound.)totheCPEtosetupconnectionsforpreprovisionedserviceflowsbelongingtotheCPE.TheCPErespondswithDSA-RSPmessages.ThisisdescribedfurtherinsubclauseError!
References:
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