1111041602000smccasb2text.docx

1111041602000smccasb2text.docx

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1111041602000smccasb2text

MCCAOPCommentsSB2

Date:

2011-03-15

Author（s）:

Name

Company

Address

Phone

Email

DeeDenteneer

HTC37;5656AEEindhoven;TheNetherlands

Philips

+31402749743

Dee.Denteneer@

GuidoHiertz

Philips

RiedelCommunicationsGmbH&Co.KG,UellendahlerStr.353,42109Wuppertal,Germany

+49-202-292-9987

hiertz@ieee.org

TextmodificationstoaddresstheMCCAcommentsraisedduringthe2ndrecirculationsponsorballotasidentifiedintheaccompanyingspreadsheet11-11-417r2.

3A.DefinitionsspecifictoIEEEStd802.11

Insertthefollowingnewdefinitions:

DTIMinterval:

TheintervalbetweentheconsecutiveTBTTsofbeaconscontainingaDTIM.Thevalue,expressedintimeunits,isequaltotheproductofthevalueintheBeaconIntervalfieldandthevalueintheDTIMPeriodsubfieldintheTIMelementinBeaconframes.（changedperCID146）

MeshAwakeWindow:

Aperiodoftimewherethemeshstation（STA）（CID268）operatesinawakestateafteritsBeaconorProbeResponseframetransmissionthatcontainedtheMeshAwakeWindowelement.

MCFcoordinatedchannelaccess（MCCA）:

Acoordinationfunctionforthemeshbasicserviceset（MBSS）.

MCFcoordinatedchannelaccessopportunity（MCCAOP）:

Aperiodoftimescheduledforframetransmissionsbetweenmeshstations（STAs）（CID268）withdot11MCCAActivatedsettotrueinanMBSS.（changedperCID144）

meshcoordinationfunction（MCF）:

Acoordinationfunctionthatcombinesaspectsofthecontention-basedandscheduledaccessmethods.（changedperCID145）TheMCFincludesthefunctionalityprovidedbybothenhanceddistributedchannelaccess（EDCA）andMCFcoordinatedchannelaccess（MCCA）.

Self-protected（Ed）Actionframe:

AnActionframethatisnoteligibleforprotectionbytheRobustManagementframeservice.TheprotectiononeachSelf-protected（Ed）Actionframeisprovidedbytheprotocolthatusestheframe.（movedfrom3.1to3.2perCID271）

4.Abbreviationsandacronyms

Insertthefollowingnewacronyminalphabeticalorder:

（AODVremovedperCID139）

AMPEAuthenticatedMeshPeeringExchange

FSMfinitestatemachine

GANNGateAnnouncement

HWMPHybridWirelessMeshProtocol

MAFMCCAAccessFraction

MBCAMeshBeaconCollisionAvoidance

MBSSmeshbasicserviceset

MCCAMCFcoordinatedchannelaccess

MCCAOPMCFcoordinatedchannelaccessopportunity

MCFmeshcoordinationfunction

MICEMICelement

MPMMeshPeeringManagement

MPSPmeshpeerserviceperiod

PERRPathError

PREPPathReply

PREQPathRequest

PXUProxyUpdate

PXUCProxyUpdateConfirm

RANNRootAnnouncement

RAVResourceAllocationVector

RSPIReceiverServicePeriodInitiated

SAESimultaneousAuthenticationofEquals

TTLTimetoLive

7.Frameformats

7.3.2.106MCCAOPSetupRequestelement

7.3.2.106.1General

TheMCCAOPSetupRequestelementisusedtomakeanMCCAOPreservation.ThiselementistransmittedinindividuallyaddressedMCCASetupRequestframesoringroupaddressedMCCASetupRequestframes.ThemeshSTAtransmittingtheMCCASetupRequestelementistheMCCAOPowneroftheMCCAOPsthatwillbescheduledwiththisreservationsetuprequest.ThereceiversoftheMCCAOPSetupRequestaretheMCCAOPresponders.TheformatoftheelementisasshowninFigure 7-95o144（MCCAOPSetupRequestelementformat）.

ElementID

Length

MCCAOP

ReservationID

MCCAOP

Reservation

Octets:

1

1

1

5

Figure7-95o144—MCCAOPSetupRequestelementformat

TheElementIDissettothevaluegiveninTable 7-26（ElementIDs）forthiselement.

TheLengthfieldissetto6.

TheMCCAOPReservationIDfieldisaneightbitunsignedintegerthatrepresentstheIDfortheMCCAOPreservation.ItisdeterminedbytheMCCAOPowner.WhenusedincombinationwiththeMACaddressoftheMCCAOPowner,theMCCAOPReservationIDuniquelyidentifiestheMCCAOPreservation.

IfthisMCCAOPSetupRequestisforanindividuallyaddressedtransmission,theMCCAOPReservationIDisbetween0and127andtheMCCAOPSetupRequestelementistransmittedinanindividuallyaddressedframetotheintendedresponder.IfthisMCCAOPSetupRequestisforagroupaddressedtransmission,theMCCAOPReservationIDisbetween128and254andtheMCCAOPSetupRequestelementistransmittedinagroupaddressedframe.Thevalue255isnotusedtoidentifyasingleMCCAOPreservation.

TheMCCAOPReservationfieldisdescribedin7.3.2.106.2（MCCAOPReservationfield）.

7.3.2.106.2MCCAOPReservationfield

TheMCCAOPReservationfieldisa5octetfieldspecifyingascheduleforframetransmissionscalledMCCAOPs.TheMCCAOPReservationfieldconsistsof3subfieldsanditsformatisillustratedinFigure 7-95o145（MCCAOPReservationfield）.

MCCAOP

Duration

MCCAOP

Periodicity

MCCAOPOffset

Octets:

1

1

3

Figure7-95o145—MCCAOPReservationfield

TheMCCAOPDurationfieldisoneoctetinlengthandcontainsanunsignedinteger.ItspecifiesthedurationoftheMCCAOPsinmultiplesof32µs.

TheMCCAOPPeriodicityfieldisoneoctetinlengthandcontainsapositiveinteger.ItspecifiesthenumberofMCCAOPsscheduledineachDTIMinterval.

TheMCCAOPOffsetfieldisthreeoctetsinlengthandcontainsanunsignedinteger.ItspecifiesthebeginningofthefirstMCCAOPineachDTIMinterval.Thevalueisspecifiedinmultiplesof32µs.ThesumofMCCAOPOffsetplusMCCAOPDurationisconstrainedtobesmallerthanthedurationoftheDTIMintervaldividedbyMCCAOPPeriodicity.

7.3.2.107MCCAOPSetupReplyelement

TheMCCAOPSetupReplyelementisusedtoreplytoanMCCAOPSetupRequest.ThiselementistransmittedinindividuallyaddressedMCCASetupReplyframes.ThemeshSTAtransmittingtheMCCASetupReplyelementistheMCCAOPresponderoftheMCCAOPsscheduledinthisreservationsetup.ThereceiveroftheMCCAOPSetupReplyistheMCCAOPowner.TheformatoftheelementisasshowninFigure 7-95o146（MCCAOPSetupReplyelementformat）.

ElementID

Length

MCCAOP

ReservationID

MCCAReplyCode

MCCAOP

Reservation

Octets:

1

1

1

1

0or5

Figure7-95o146—MCCAOPSetupReplyelementformat

TheElementIDissettothevaluegiveninTable 7-26（ElementIDs）forthiselement.

TheLengthfieldissetto2or7octets.

TheMCCAOPReservationIDfieldisaneightbitunsignedintegerthatrepresentstheIDfortherequestedseriesofMCCAOPs.ItisdeterminedbytheMCCAOPownerandcopiedfromtheMCCAOPSetupRequestelement.WhenusedincombinationwiththeMACaddressoftheMCCAOPowner,theMCCAOPReservationIDuniquelyidentifiestheMCCAOPreservation.IfthisMCCAOPSetupRequestisforanindividuallyaddressedtransmission,theMCCAOPReservationIDisbetween0and127.IfthisMCCAOPSetupRequestisforagroupaddressedtransmission,theMCCAOPReservationIDisbetween128to254.Thevalue255isnotusedtoidentifyasingleMCCAOPreservation.

TheMCCAReplyCodefieldisaoneoctetfieldthatcontainsthereplycodeusedinanMCCAOPSetupReplyelement.ThereplycodesaredefinedinTable 7-43bj7（MCCAReplycodes）

Table7-43bj7—MCCAReplycodes 

MCCAReplycode

Meaning

0

Accept

1

Reject:

MCCAOPreservationconflict

2

Reject:

MAFlimitexceeded

3

Reject:

MCCAtracklimit（dot11MCCAMaxTrackStates）exceeded

Other

Reserved

.

TheMCCAOPReservationfieldincludesanalternativetotheMCCAOPreservationspecifiedintheMCCAOPSetupRequestmessage.Itsformatisdescribedin7.3.2.106.2（MCCAOPReservationfield）.WhentheMCCAReplyCodeis1,theMCCAOPReservationfieldmaybepresent.WhentheMCCAReplyCodeissettoothervalues,theMCCAOPReservationfieldisnotpresent.

7.3.2.108MCCAOPAdvertisementOverviewelement

TheMCCAOPAdvertisementOverviewelementisusedbyameshSTAtoadvertiseitsMCCAInformationandinformationaboutitsMCCAOPAdvertisementelements,representingitsMCCAOPadvertisementset,toitsneighbors.ThiselementistransmittedinselectedBeaconframeswithachosenfrequency.ThiselementisalsotransmittedinanMCCAAdvertisementframe.

TheformatoftheMCCAOPAdvertisementOverviewelementisasshowninFigure 7-95o147（MCCAOPAdvertisementOverviewelementformat）.

ElementID

Length

AdvertisementSetSequenceNumber

Flags

MCCAAccess

Fraction

MAFLimit

AdvertisementElementsBitmap

Octets:

1

1

1

1

1

1

2

Figure7-95o147—MCCAOPAdvertisementOverviewelementformat

TheElementIDissettothevaluegiveninTable 7-26（ElementIDs）forthiselement.TheLengthfieldissetto6.

TheAdvertisementSetSequenceNumberfieldis1octetinlengthandiscodedasanunsignedinteger.ItissettotheadvertisementsetsequencenumberofthecurrentMCCAOPadvertisementset.TheAdvertise-mentSetSequenceNumber,togetherwiththeMACaddressofthetransmitteroftheMCCAOPAdvertisementOverviewelement,identifiesanMCCAOPadvertisementsetandprovidesanidentifierandachronologicalorderofdifferentMCCAOPadvertisementsetsofthesamemeshSTA.

TheformatoftheFlagsfieldisshowninFigure 7-95o148（Flagsfieldformat）.

B0

B1B7

Accept

Reservations

Reserved

Bits:

1

7

Figure7-95o148—Flagsfieldformat

TheFlagsfieldissetasfollows:

—Bit0:

AcceptReservationssubfield.TheAcceptReservationssubfieldissetto1ifthemeshSTAcanacceptandtrackadditionalreservations.Itissetto0otherwise.

—Bit1-7:

Reserved

TheMCCAAccessFractionfieldisaneightbitunsignedinteger.TheMCCAAccessFractionfieldissettothecurrentvalueoftheMCCAaccessfractionatthemeshSTAroundeddown（floor）tothenearestmultipleof（1/255）oftheDTIMintervallength.

TheMAFLimitfieldisaneightbitunsignedinteger.TheMAFLimitfieldissettothemaximumMCCAaccessfractionallowedatthemeshSTAroundeddown（f