111103000200aalb713gcrcommentsnormativetext.docx

111103000200aalb713gcrcommentsnormativetext.docx

《111103000200aalb713gcrcommentsnormativetext.docx》由会员分享，可在线阅读，更多相关《111103000200aalb713gcrcommentsnormativetext.docx（54页珍藏版）》请在冰豆网上搜索。

111103000200aalb713gcrcommentsnormativetext

IEEEP802.11

WirelessLANs

NormativetextforLB173GCRcommentresolutions

Date:

2011-03-15

Author（s）:

Name

Affiliation

Address

Phone

email

AlexAshley

NDSLtd

OneLondonRoad,Staines,Middlesex,TW184EX,UK

aashleyatndsdotcom

SantoshPandey

Cisco

sanpandeatciscodotcom

Abstract

ThisdocumentcontainsproposedresolutionstocommentsreceivedinLB173intheGCRcategory.

3.Definitions,acronymsandabbreviations

3.1Definitions

advancedgroupcastwithretries（GCR）:

AsetoffeaturescomprisedoftheGCRblockacknowledgementretransmissionpolicyandtheGCRserviceperiod（GCR-SP）deliverymethod.（#2379）

activefrompowersave（Active-PS）:

Adeliverymethodforgroupaddressedframeswherebygroupaddressedframesaretransmittedwhenallassociatednon-accesspoint（non-AP）stations（STAs）areinactivemodeortheAwakestateofthepowersave（PS）mode.（#2377）

groupcastwithretries（GCR）serviceperiod（GCR-SP）:

AdeliverymethodforagroupaddressedstreamsubjecttoaGCRagreementwhereintheframesaretransmittedat（#2044）intervals,wheretheintervalbetweentransmissions（#2053）mightbesmallerthanthebeaconinterval.

activegroupcastwithretries（GCR）serviceperiod（ActiveGCR-SP）:

AdeliverymethodforagroupaddressedstreamsubjecttoaGCRagreementwhereintheframesmaybetransmittedwithoutregardtothepowerstateofnon-APSTAs.（#2044）（#2410）

concealedgroupcastwithretries（GCR）frame:

Agroupaddressedframethatistransmittedusingtheaggregatemediumaccesscontrol（MAC）servicedataunit（A-MSDU）frameformatwiththedestinationaddress（DA）fieldsettotheGCRconcealmentaddress.（#2079）

groupcastwithretries（GCR）concealmentaddress:

A（#2102）mediumaccesscontrol（MAC）addressthatisusedtopreventgroupaddressedframestransmittedviatheGCRunsolicitedretry（#2278）orGCRBlockAck（#2297）retransmissionpoliciesfrombeingpasseduptheMAC-serviceaccesspoint（MAC_SAP（#2230））ofGCR-incapablestations.

groupcastwithretries（GCR）service:

Ameansfortransmissionandretransmissionofmediumaccesscontrol（MAC）servicedataunits（MSDUs）toadestinationthatisagroupaddressthatprovidesgreaterreliabilitybyusing（#2376）groupaddressedretransmissions,concealedfromGCR-incapablestations.

non-concealedgroupcastwithretries（GCR）frame:

AgroupaddressedframethatisnottransmittedtotheGCRconcealmentaddress.（#2079）

4.3.aa12.1Groupcastwithretries（#2182）

Thegroupcastwithretries（GCR）service（#2182）allowsaSTAtorequestgreaterreliabilityforoneormoregroupaddressedstreamsthattheSTAreceives.Greaterreliabilityisprovidedvia（#2380）unsolicitedretries,ortheBlockAckmechanism.Anon-APSTAmayrequestdeliverywhenallassociatednon-APSTAsareinactive（#2182modeortheAwakestateofthePSmode（#2377）,sothattheAPtransmitstheframesviaEDCAwithinregularserviceperiods（#2182）.

5.1.1.5InterpretationofserviceclassparameterinMACserviceprimitivesinaSTA

Change5.1.1.5asfollows:

InQoSSTAs,thevalueoftheserviceclassparameterintheMACserviceprimitive（see5.2）maybeanonintegervalueofQoSAckorQoSNoAck.

WhenanMSDUisreceivedfromtheMAC_SAPandtherecipientSTAisaQoSSTAwiththeserviceclasssetto

QoSAck,theMSDUistransmittedusingaQoSdataframewiththeAckPolicysubfieldintheQoSControlfieldsettoeitherNormalAcknowledgment（NormalAck）orBlockAck.

QoSNoAck,theMSDUistransmittedusingaQoSdataframewiththeAckPolicysubfieldintheQoSControlfieldsettoNoAcknowledgment（NoAck）.IfthesenderSTAisanAPandtheframehasagroupDA,thentheMSDUisbufferedfortransmissionandisalsosenttotheDS.

IfthesenderSTAisanAPandtheframehasagroupDAthatisnottheGCRconcealmentaddress（#2103）,thentheMSDUisbufferedfortransmissionandisalsosenttotheDS.

WhenanMSDUisreceivedfromtheMAC_SAPandtherecipientSTAisnotaQoSSTA,theMSDUistransmittedusinganon-QoSdataframe.

WhenaQoSdataframeisreceivedfromanotherSTA,theserviceclassparameterinMA-UNITDATA.indicationprimitiveissetto

QoSAck,iftheframeisaQoSdataframewiththeAckPolicysubfieldintheQoSControlfieldequaltoeitherNormalAckorBlockAck.,

QoSAck,iftheframeistobedeliveredviaDMSor（#2105）theGCRBlockAckretransmissionpolicy（#2381）.

QoSNoAck,iftheframeisaQoSdataframewiththeAckPolicysubfieldintheQoSControlfieldequaltoNoAck.ThisserviceclassisalsousedwheretheDAparameterisagroupaddressunlesstheframeistobedeliveredviaDMS（#2105）theGCRBlockAckretransmissionpolicy（#2381）.

Whenanon-QoSdataframeisreceivedfromaSTA,theserviceclassparameterinMA-UNITDATA.indicationprimitiveissetto

QoSAck,iftheframeisanindividuallyaddressedframeandisacknowledgedbytheSTA.

QoSNoAck,iftheframeisagroupaddressedframeandisnotacknowledgedbytheSTA.

Notethatthegroupaddressedframessentbyanon-QoSSTAarenotacknowledgedregardlessoftheserviceclassparameterinMA-UNITDATA.indicationprimitive.

NOTE—GCRframesareonlytransmittedbyaQoSAPora（#2106）meshSTA

6.3.29BlockAck

6.3.29.2MLME-ADDBA.request（#2387）

6.3.29.2.2Semanticsoftheserviceprimitive

InserttwoextraparametersbeforetheVendorSpecificInfoparameterasindicated:

Theprimitiveparametersareasfollows:

MLME-ADDBA.request（

PeerSTAAddress,

DialogToken,

TID,

BlockAckPolicy,

BufferSize,

BlockAckTimeout,

ADDBAFailureTimeout,

BlockAckStartingSequenceControl,

Extended,

GCRGroupAddress,

VendorSpecificInfo

）

InsertthefollowingtwoparameterdescriptionsabovetheVendorSpecificInforow（notethattheentiretableisnotshownhere）:

Name

Type

Validrange

Description

Extended

Boolean

true,false

SpecifieswhethertherequestissentusinganExtendedADDBAframeoranADDBAframe.

Iftrue,therequestissentusinganExtendedADDBAframe

Iffalse,therequestissentusinganADDBAframe

GCRGroupAddress

MACAddress

AnyvalidgroupMACaddress

SpecifiesthegroupaddressforwhichaBlockAckagreementisrequested

6.3.29.3MLME-ADDBA.confirm（#2387）

6.3.29.3.2Semanticsoftheserviceprimitive

InsertanextraparameterbeforetheVendorSpecificInfoparameterasindicated:

Theprimitiveparametersareasfollows:

MLME-ADDBA.confirm（

PeerSTAAddress,

DialogToken,

TID,

ResultCode,

BlockAckPolicy,

BufferSize,

BlockAckTimeout,

GCRGroupAddress,

VendorSpecificInfo

）

InsertthefollowingparameterdescriptionabovetheVendorSpecificInforow（notethattheentiretableisnotshownhere）:

Name

Type

Validrange

Description

GCRGroupAddress

MACAddress

AnyvalidgroupMACaddress

SpecifiesthegroupaddressforwhichaBlockAckagreementwasrequested

6.3.29.4MLME-ADDBA.indication（#2387）

6.3.29.4.2Semanticsoftheserviceprimitive

InserttwoextraparametersbeforetheVendorSpecificInfoparameterasindicated:

Theprimitiveparametersareasfollows:

MLME-ADDBA.indication（

PeerSTAAddress,

DialogToken,

TID,

BlockAckPolicy,

BufferSize,

BlockAckTimeout,

Extended,

GCRGroupAddress,

VendorSpecificInfo

）

InsertthefollowingtwoparameterdescriptionsabovetheVendorSpecificInforow（notethattheentiretableisnotshownhere）:

Name

Type

Validrange

Description

Extended

Boolean

true,false

SpecifieswhetherthereceivedrequestwascontainedinanExtendedADDBAframeoranADDBAframe.

Iftrue,therequestwasreceivedusinganExtendedADDBAactionframeformat

Iffalse,therequestwasreceivedusinganADDBAactionframeformat

GCRGroupAddress

MACAddress

AnyvalidgroupMACaddress

SpecifiesthegroupaddressforwhichaBlockAckagreementisrequested

6.3.29.5MLME-ADDBA.response（#2387）

6.3.29.5.2Semanticsoftheserviceprimitive

InsertanextraparameterbeforetheVendorSpecificInfoparameterasindicated:

Theprimitiveparametersareasfollows:

MLME-ADDBA.response（

PeerSTAAddress,

DialogToken,

TID,

ResultCode,

BlockAckPolicy,

BufferSize,

BlockAckTimeout,

GCRGroupAddress,

VendorSpecificInfo

）

InsertthefollowingtwoparameterdescriptionsabovetheVendorSpecificInforow（notethattheentiretableisnotshownhere）:

Name

Type

Validrange

Description

GCRGroupAddress

MACAddress

AnyvalidgroupMACaddress

SpecifiesthegroupaddressforwhichaBlockAckagreementwasrequested

8.2.4Framefields

8.2.4.1FrameControlfield

8.2.4.1.8MoreDatafield

Changethefourthparagraphof8.2.4.1.8asfollows:

TheMoreDatafieldissetto1ingroupaddressedframestransmittedbytheAPwhenadditionalgroupaddressedBUsthatarenotpartofanactiveGCR-SPremaintobetransmittedbytheAPduringthisbeaconinterval.TheMoreDatafieldissetto0ingroupaddressedframestransmittedbytheAPwhennomoregroupaddressedBUsthatarenotpartofanactiveGCR-SPremaintobetransmittedbytheAPduringthisbeaconintervalandinallgroupaddressedframestransmittedbynon-APSTAs.

Insertthefollowingparagraphafterthefourthparagraphof8.2.4.1.8

TheMoreDatafieldissetto1ingroupaddressedframestransmittedbytheAPwhenadditionalgroupaddressedBUsthatarepartofanactiveGCR-SPremaintobetransmittedbytheAPduringthisGCR-SP.TheMoreDatafieldissetto0ingroupaddressedframestransmittedbytheAPwhennomoregroupaddressedBUsthatarepartofanactiveGCR-SPremaintobetransmittedbytheAPduringthisGCR-SP.（#2382）

8.4.2.36Scheduleelement

Changethefirstparagraphof8.4.2.36asfollows:

TheScheduleelementistransmittedbytheHCtoanon-APSTAtoannouncetheschedulethattheHC/APfollowsforadmittedstreamsoriginatingfromorde