111103060200accommentresolutiontpc.docx

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111103060200accommentresolutiontpc

IEEEP802.11

WirelessLANs

CommentResolutionforTransmitPowerLimitforWiderBandwidths

Date:

2011-03-21

Author（s）:

Name

Affiliation

Address

Phone

email

DaewonLee

LGElectronics

LGR&DComplex533,Hogye-1dong,Dongan-Gu,Anyang-Shi,Kyungki-Do,431-749,Korea

+82-31-450-7897

daewon.lee@

YonghoSeok

LGElectronics

LGR&DComplex533,Hogye-1dong,Dongan-Gu,Anyang-Shi,Kyungki-Do,431-749,Korea

+82-31-450-1497

yongho.seok@

MenzoWentink

Qualcomm

Straatweg66-S,Breukelen,TheNetherlands

mwentink@

Abstract

SubmissionforDraftP802.11ac_D0.1commentresolution.Thedocumentaddressesvariouscommentsrelatedtotransmitpowerlimitconfigurationforwiderbandwidthsuchas80MHz,160MHz,andnon-contiguous80+80Mhzchannelbandwidths.

SubmissionaddressesDraftP802.11ac_D0.1comments559,1030,1031,1032,1453,1454,1455,and1525.

Introduction

InterpretationofaMotiontoAdopt

AmotiontoapprovethissubmissionmeansthattheeditinginstructionsandanychangedoraddedmaterialareactionedintheTGacDraft.Thisintroductionisnotpartoftheadoptedmaterial.

EditinginstructionsformattedlikethisareintendedtobecopiedintotheTGacDraft（i.e.theyareinstructionstothe802.11editoronhowtomergethetextwiththebaselinedocuments）.

TGacEditor:

Editinginstructionsprecededby“TGacEditor”areinstructionstotheTGaceditortomodifyexistingmaterialintheTGacdraft.Asaresultofadoptingthechanges,theTGaceditorwillexecutetheinstructionsratherthancopythemtotheTGacDraft.

SubmissionNote:

Notestothereaderofthissubmissionarenotpartofthemotiontoadopt.Thesenotesaretheretoclarifyorprovidecontext.

CID

Commenter

Name

Subclause

Page

Line

Comment

Type

Comment

SuggestedRemedy

559

Kim,EunSun

7.3.2

28

44

TR

For160MHzand80+80MHztransmission,thewideBWtransmissioncanspanacrossdifferentoperatingclasses（powerregimes）.Themaximumtransmitpowerconstraintsfortransmitbandscanbedifferentbyregulations.Specificationsforthemaximumtransmitpowerrulesandthemethodtoanouncethislimitsarerequired.

Clarifythemaximumtransmitpowerlimitsfor160MHzand80+80MHztransmissioncases.Also,specifyamethodtoannouncethisinformation.

1030

Seok,Yongho

7.3.2

28

44

TR

specificationregardingTransmitPowercontrolforwiderbandwidthsuchas80MHz,160Mhz,and80+80Mhzismissing.

aspercomment

1031

Seok,Yongho

7.3.2

28

44

TR

specificationregardingchannelswithcingforwiderbandwidth（80MHz,160Mhz,and80+80Mhz）BSSismissing

aspercomment

1032

Seok,Yongho

7.3.2

28

44

TR

specificationregardingpowerconstraintelementfor160Mhzand80+80MhztransmissionwherethewiderBWtransmissioncanspanacrossdifferentoperatingclasses（powerregimes）

aspercomment

1453

Lee,Daewon

7.3.2

28

44

TR

missingspecificationfor80/160MHzTransmitPowercontrol

addTPCfor80/160MHz

1454

Lee,Daewon

7.3.2

28

44

TR

missingspecificationfor80/160MHzchannelswitching

addchannelswitchfor80/160MHz

1455

Lee,Daewon

7.3.2

28

44

TR

missingspecificationfor80/160MHzpowerconstraintelement

addpowerconstraintfor80/160MHz

1525

SOHN,ILLSOO

7.3.2

28

44

TR

Maximumpowerconstraintsfor160MHz/80+80MHzareunclearsinceBWliesacrossdifferentpowerregimes.

Clarifyhowtoapplymaximumpowerlimitfor160MHz/80+80MHzcasesandsignalingmethod.

Discussion:

WiththesupportofverywidebandwidthsinVHT,thetransmissionsignalmaybesubjecttovarioustransmitpowerconstraintgivenbytheregulatorybody.ForexampleinUSthetransmitpowerforUNII-1andUNII-2aredifferent,wherethe160MHztransmissionsignalcanbetransmittedacrossthesebands.

Figure1.Exampleoftransmissionindifferenttransmitpowerregulatorydomains

Therearetwocomponentstolimitingtransmissionpowerfor802.11,thefirstisthetransmitpowerinformationgivenbytheCountryinformationelement,andthesecondispowerconstraintelementwhichgivefurtherrestrictionsontopofthemaximumtransmitpowerspecifiedbytheCountryIE.

SincetheVHTtransmissioncanbealsotransmittedinnon-contiguousmannerandalsosupportdynamicswitchingbetween20,40,80,160/80+80MHzbandwidths,wemustbeabletoindicatenon-contiguousbandswhicharebackwardcompatible.Figure1showssomeexamplesofhowthetransmitpowermaychangefordifferenttransmissionbandwidths.

AftersomediscussiontheuseofCountryIE,wereceivedcommentswheretheremightbeissueswithlegacySTAsinterpretingtheCountryIEwithoperatingtripletwithoperatingextensionidentifierwith201orabove.Becauseofthisweproposetodefinenewinformationelementwiththeneededinformation.Intheproposedtextwecallthisinformationelement‘VHTTransmitPowerEnvelopeelement’.

Thetwofields‘ChannelCenterFrequencySegment’and‘SegmentChannelWidth’arerepeatedasneeded,asdeterminedbythe‘Length’field.

ElementID

Length

MaximumTransmitPower

ChannelCenterFrequencySegment

SegmentChannelWidth

Octets:

1

1

1

1

1

Thepowerconstraintelementcontainsthelocalmaximumtransmitpowerinthecurrentchannel.Thiselementcanbeusedinbothcontiguousandnon-contiguoustransmissionsignals,butifthewidebandsignalisbeingtransmittinginmultipleregulatorytransmitpowerlimitdomains,thenwemayneedtofurtherindicatehowdifferentiatethetransmitpowerlimitforsmallerbandwidthandlargebandwidths.Forthisweproposetoaddoneelementwhichextendsthepowerconstraintelement.WeproposetoextenditbyalsoincludingbandwidthinformationsothatVHTdevicescanunderstandforwhichbandwidthsthelocalpowerconstraintapplies.Sinceiftheoperatingchannelbandwidthiseither20or40MHz,thereisnoneedforthisextendedpowerconstraintelement,weproposeonlytosignaltheextendedpowerconstraintelementiftheAPisoperatinginchannelwidthslagerthan80MHzorabove.

Table3.PowerConstraintelement

ElementID

Length

LocalPowerConstraint

Octets:

1

1

1

Table4.ExtendedPowerConstraintelement

Thetwofields‘ChannelWidth’and‘LocalPowerConstraint’arerepeatedasneeded,asdeterminedbythelengthfield.

ElementID

Length

ChannelWidth

LocalPowerConstraint

Octets:

1

1

1

1

ItmaybepossibletoextendtheChannelPowerManagementelementusedin11aftoinformthetransmitpowerlimitsbutthesaidinformationelementprovidesvariousTVWhiteSpacespecificfunctionalities.ThefunctionalitiesincludedintheCPMelementaresignalingofchangesofchannelavailability,signalingofMaximumTransmitPowerswitchingfromtheregulatorydatabase,andsignalingofChannel（andPower）switching.Thesupportofsuchelementwithallthefunctionalitiesthereininthe5GHzisrathernotclearandmaycauseadditionalimplementationneededforVHT5GHzonlysupportdevices.

TokeepthechannelswitchmechanismsimpleandconsideringtheVHTisonlysupportedinthe5GHz,weproposetoextendtheexistingtransmitpowerandpowercapabilitiesinformationelementtosupportwiderbandwidths.

ProposedResolution:

AgreeinprincipletofinalizetheTBDfieldsasdescribedinDraftP802.11ac_D0.1comments559,1030,1031,1032,1453,1454,1455,and1525.

Editinginstructions:

7.2.3.1Beaconframeformat

TGaceditor:

InserttheVHTTransmitPowerEnvelopeelementandtheExtendedPowerConstraintelementinTable7-8Beaconframebodyafterorder41andbeforeorderLast:

Table7-8—Beaconframebody

Order

Information

Notes

VHTTransmitPowerEnvelopeelement

TheVHTTransmitPowerEnvelopeelementispresentifdot11SpectrumManagementRequiredistrueordot11RadioMeasurementActivatedistrue.

ExtendedPowerConstraintelement

TheExtendedPowerConstraintelementispresentifdot11VHTOptionImplementedattributeistrueandSTAChannelsubfieldoftheVHTOperationInformationfieldissetto80MHzorabove,anddot11SpectrumManagementRequiredistrue.

7.2.3.9ProbeResponseframeformat

TGaceditor:

InserttheVHTTransmitPowerEnvelopeelementandtheExtendedPowerConstraintelementinTable7-15ProbeResponseframebodyafterorder39andbeforeorderLast-l:

Table7-15—ProbeResponseframebody

Order

Information

Notes

VHTTransmitPowerEnvelopeelement

TheVHTTransmitPowerEnvelopeelementispresentifdot11SpectrumManagementRequiredistrueordot11RadioMeasurementActivatedistrue.

ExtendedPowerConstraintelement

TheExtendedPowerConstraintelementispresentifdot11VHTOptionImplementedattributeistrueandSTAChannelsubfieldoftheVHTOperationInformationfieldissetto80MHzorabove,anddot11SpectrumManagementRequiredistrue.

7.3.2Informationelements

TGaceditor:

Insertthefollowingrowintable7-16,andrenumberthereservedvaluesaccordingly:

Table7-16—ElementIDs

Element

ElementID

Length（inoctets）

Extensible

VHTTransmitPowerEnvelopeelement

6-256

Yes

ExtendedPowerConstraint

4-256

Yes

TGaceditor:

InsertthefollowingVHTTransmitPowerEnvelopeelementsectiontothelastsubsectionof7.3.2:

7.3.2.64VHTTransmitPowerEnvelopeelement

TheVHTTransmitPowerEnvelopeelementcontainstheinformationnecessarytoconveythemaximumtransmitpowerforvarioustransmissionbandwidthofVHTdevices.TheformatoftheVHTTransmitPowerEnvelopeelementinshowninFigure7-95o27b（VHTTransmitPowerEnvelopeelementformat）.

Thetwofields‘Cha