111103060200accommentresolutiontpc.docx
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111103060200accommentresolutiontpc.docx
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111103060200accommentresolutiontpc
IEEEP802.11
WirelessLANs
CommentResolutionforTransmitPowerLimitforWiderBandwidths
Date:
2011-03-21
Author(s):
Name
Affiliation
Address
Phone
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
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