1111045201000sstatemachinereorder.docx

1111045201000sstatemachinereorder.docx

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1111045201000sstatemachinereorder

IEEEP802.11

WirelessLANs

ARe-Orderingofthe（Authenticated）PeerLinkManagementProtocol

Date:

2011-03-17

Author（s）:

Name

Affiliation

Address

Phone

email

DanHarkins

ArubaNetworks

1322Crossmanave,Sunnyvale,CA

+14082274500

dharkinsatarubanetworksdotcom

GuenaelStrutt

PowerwaveTechnologies

1801EStAndrewplace

SantaAna,CA92705

+17144661792

gstruttatpwavdotcom

Abstract

Thissubmissionsubstantiallyre-ordersthestatemachinetextforMPMandAMPE.

Modifysection11C.4.4andsub-clausesasindicated:

11C.4.4MeshPeeringManagementfinitestatemachine（MPMFSM）

11C.4.4.1General

Eachmeshpeeringinstance,includingitsstatesandresource,aremanagedbyaMeshPeeringManagementfinitestatemachine（MPMFSM）.TheMPMFSMusesMLMEprimitivestocontrolthemeshSTAtosendandreceiveMeshPeeringManagementframes.

11C.4.4.2States

TheMeshPeeringManagementfinitestatemachineusesthefollowingsixstates:

—IDLE—IDLEstateisaterminalstate.IntheIDLEstate,theMPMFSMisreadytostartanewmeshpeeringinstancebyeitherpassivelylisteningforanincomingMeshPeeringOpenframeoractivelyinitiatingameshpeeringinstance.

—OPN_SNT—IntheOPN_SNTstate,thefinitestatemachinehassentaMeshPeeringOpenframeandiswaitingforaMeshPeeringOpenframeandMeshPeeringConfirmframefromthecandidatepeermeshSTA.

—CNF_RCVD—IntheCNF_RCVDstate,thefinitestatemachinehasreceivedaMeshPeeringConfirmframe,buthasnotreceivedaMeshPeeringOpenframe.ThemeshSTAhasnotsentthecorrespondingMeshPeeringConfirmframeyet.

—OPN_RCVD—IntheOPN_RCVDstate,thefinitestatemachinehasreceivedonlytheMeshPeeringOpenframebutnottheMeshPeeringConfirm.ThemeshSTAhasalsosentaMeshPeeringConfirmframeuponreceivingaMeshPeeringOpenframe.

—ESTAB—IntheESTABstate,thefinitestatemachinehasreceivedboththeMeshPeeringOpenandMeshPeeringConfirmframes.ThemeshSTAhasalsosentboththeMeshPeeringOpenframeandMeshPeeringConfirmframe.ThemeshpeeringisestablishedandconfiguredforexchangingframeswiththepeermeshSTAintheESTABstate.

—HOLDING—IntheHOLDINGstate,thefinitestatemachineisclosingthemeshpeeringinstancewiththepeermeshSTAorthecandidatepeermeshSTA.

11C.4.4.3Eventsandactions

Thefinitestatemachineusesthreetypesofevents:

1）eventsforstatemachinetransitions;2）externaleventsgeneratedbyframeprocessing;and3）eventsassociatedwithinternaltimers.

Theeventsforstatemachinetransitionsare:

—CNCL（localLinkID,peerMAC,ReasonCode）—UsedtoinstructthemeshpeeringinstancetocancelthemeshpeeringwiththepeermeshSTA.localLinkIDidentifiestheMPMFSMforthecorrespondingmeshpeeringinstance.peerMACistheMACaddressofthepeermeshentity.ReasonCodeisusedtoinformthereasontocancelthemeshpeeringinstance.See11C.3.6.1（MeshPeeringCloseprocessing）.

—ACTOPN（peerMAC,localLinkID）—TheSMEusesthiseventtocreateanewmeshpeeringinstancetoactivelyinitiatethemeshpeeringestablishmentwiththecandidatepeermeshSTAwhoseMACaddressispeerMAC.localLinkIDidentifiestheMPMFSM.

Theeventsgeneratedbyframeprocessingare:

—OPN_ACPT—PeeringOpen_Accept（peerMAC,peerLinkID）eventindicatesthataMeshPeeringOpenframemeetingthecorrectnesscriteriaof11C.4.3.2（MeshPeeringOpenframes）hasbeenreceivedfrompeerMACforthemeshpeeringinstanceidentifiedbypeerLinkID.

—OPN_RJCT—PeeringOpen_Reject（peerMAC,peerLinkID,Configuration,reasonCode）eventindicatesthataMeshPeeringOpenframefrompeerMACforthemeshpeeringinstanceidentifiedbypeerLinkIDisrejectedduetoincompleteorerroneousconfiguration,asindicatedbytheConfiuration,withreasonCodebeingthespecificreasonforrejectionoftheMeshPeeringOpenframe.See11C.3.4.2（MeshPeeringOpenprocessing）.

—CNF_ACPT—PeeringConfirm_Accept（peerMAC,localLinkID,peerLinkID）eventindicatesthataMeshPeeringConfirmframemeetingthecorrectnesscriteriaof11C.4.3.3（MeshPeeringConfirmframes）hasbeenreceivedfrompeerMACforthemeshpeeringinstanceidentifiedbylocalLinkIDandpeerLinkID.

—CNF_RJCT—PeeringConfirm_Reject（peerMAC,localLinkID,peerLinkID,reasonCode）eventindicatesthataMeshPeeringConfirmframefrompeerMACforthemeshpeeringinstanceidentifiedbylocalLinkID,peerLinkIDisrejectedduetoincompleteorerroneousconfiguration,andreasonCodeisthespecificreasonforrejectionoftheConfirmframe.See11C.3.5.2（MeshPeeringConfirmprocessing）.

—CLS_ACPT—PeeringClose_Accept（peerMAC,localLinkID,peerLinkID,reasonCode）eventindicatesthataMeshPeeringCloseframemeetingthecorrectnesscriteriaof11C.4.3.4（MeshPeeringCloseframes）hasbeenreceivedfrompeerMACforthemeshpeeringinstanceidentifiedbylocalLinkIDandpeerLinkID.ThereasonCodespecifiesthereasonthatcausedthegenerationoftheMeshPeeringCloseframe.See11C.3.6.1（MeshPeeringCloseprocessing）.

—REQ_RJCT—PeeringRequest_Reject（peerMAC,peerLinkID,reasonCode）eventindicatesaspecialincidencethatthemeshSTArejectstheincomingMeshPeeringOpenframerequestingtosetupanewmeshpeeringforsomespecifiedreason.TheincomingrequestisidentifiedbythepeerMAC,peerLinkIDisthepeerLinkIDreceivedfromtheMeshPeeringOpenframe,andreasonCodeisthespecificreasonforrejectionoftheMeshPeeringOpenframe.See11C.3.4.2（MeshPeeringOpenprocessing）.

1.

—

—

—

—

Thefinitestatemachinemaytakeanactiontriggeredbyanevent.Itusestwotypesofactions:

sendingaMeshPeeringManagementframeandhandlingatimer.

ActionsrelatedtosendingaMeshPeeringManagementframeareasfollows:

—sndOPN—sendOpen（peerMAC,localLinkID,Configuration）istheactionthatthemeshSTAtakestosendaMeshPeeringOpenframetothecandidatepeermeshSTA,whoseMACaddressispeerMAC..TheMLME-MeshPeeringManagement.requestprimitiveshallbeinvokedtosendtheframetothepeermeshentity.

—sndCNF—sendConfirm（peerMAC,localLinkID,peerLinkID,Configuration）istheactionthatthemeshSTAtakestosendaMeshPeeringConfirmframetothecandidatepeermeshSTA,whoseMACaddressispeerMAC..TheMLME-MeshPeeringManagement.requestprimitiveshallbeinvokedtosendtheframetothepeermeshentity.

—sndCLS—sendClose（peerMAC,localLinkID,peerLinkID,reasonCode）istheactionthatthemeshSTAtakestosendaMeshPeeringCloseframetothepeermeshSTAorcandidatepeermeshSTA,whoseMACaddressispeerMAC.TheMLME-MeshPeeringManagement.requestprimitiveshallbeinvokedtosendtheframetothepeermeshentity.

—

—

11C.4.4.4Timers

Threetimersareusedbythefinitestatemachine:

2.TheretryTimertriggersaresendoftheMeshPeeringOpenframewhenaMeshPeeringConfirmframewasnotreceivedasaresponse.TheretryTimerissettothedot11MeshRetryTimeout.

3.TheconfirmTimersignalsthatalinkestablishmentattemptshouldbeabortedbecauseaMeshPeeringConfirmframerespondingtoaMeshPeeringOpenframewasneverreceived.TheconfirmTimerissettothevalueofdot11MeshConfirmTimeout.

4.TheholdingTimersignalsthatitsmeshpeeringinstancemaybecompletelyclosedandfacilitatesgracefulshutdown.TheholdingTimerissettothevalueofdot11MeshHoldingTimeout.

Theeventsassociatedwithinternaltimersareindicatedinthestatemachineasacronymsthatindicatetimerexpiry..Witheachtimereventthereisanassociatedaction.

—TOR1—ThiseventindicatesthattheretryTimerhasexpiredanddot11MeshMaxRetrieshasnotbeenreached.TheMeshPeeringOpenframeshallberesent,anactionindicatedinthestatemachinebysetR.

—TOR2—ThiseventindicatesthattheretryTimerhasexpiredanddot11MeshMaxRetrieshasbeenreached.ThemeshpeeringinstanceshallbeclosedwhenTOR2occurs.

—TOC—ThiseventindicatesthattheconfirmTimerhasexpired..WhenTOCeventoccurs,themeshpeeringinstanceshallbeclosed,anactionindicatedinthestatemachineassetC.

—TOH—ThiseventindicatesthattheholdingTimerhasexpired.WhenTOHoccurs,themeshpeeringinstanceshallbeclosedandthefinitestatemachineshalltransitiontoIDLEstate,anactionindicatedinthestatemachineassetH.

11C.4.4.5Statetransitions

Table 11C-1（MeshPeeringManagementfinitestatemachine）andFigure 11C-2（FinitestatemachineofMeshPeeringManagementprotocol）summarizethestatetransitionsfortheMeshPeeringManagementprotocol.

InTable 11C-1（MeshPeeringManagementfinitestatemachine）,eachrowrepresentsstatetransitionsfromthestatetoallotherstates.Ablankentryindicatesanimpossibletransition.

Table11C-1—MeshPeeringManagementfinitestatemachine

ToState

IDLE

OPN_SNT

CNF_RCVD

OPN_RCVD

ESTAB

HOLDING

FromState

IDLE

REQ_RJCT/sndCLS

ACTOPN/（sndOPN,setR）

OPN_ACPT/（sndOPN,sndCNF,setR）

OPN_SNT

TOR1/（sndOPN,setR）

CNF_ACPT/（clR,setC）

OPN_ACPT/（sndCNF）

CLS_ACPT,OPN_RJCT,CNF_RJCT,TOR2,CNCL/（sndCLS,clR,setH）

CNF_RCVD

OPN_ACPT/（clC,sndCNF）

CLS_ACPT,OPN_RJCT,CNF_RJCT,CNCL/（sndCLS,clC,setH）

TOC/（sndCLS,setH）

OPN_RCVD

OPN_ACPT/sndCNF

TOR1/（sndOPN,setR）

CNF_ACPT/clR

CLS_ACPT,OPN_RJCT,CNF_RJCT,TOR2,CNCL/（sndCLS,clR,setH）

ESTAB

OPN_ACPT/sndCNF

CLS_ACPT,OPN_RJCT,CNF_RJCT,CNCL/（sndCLS,setH）

HOLDING

TOH/—,CLS_ACPT/clH

OPN_ACPT,CNF_ACPT,OPN_RJCT,CNF_RJCT/sndCLS

InFigure 11C-2（FinitestatemachineofMeshPeeringManagementprotocol）,eacharrowrepresentsastatetransition.

Figure11C-2—FinitestatemachineofMeshPeeringManagementproto