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DWS-4026
Руководство пользователя. Версия 2.0 Страница: 541

D-Link DWS-4026 Руководство пользователя. Версия 2.0 онлайн [541/741] 172936

BasicSetup

D-Link UnifiedWiredandWirelessAccessSystem

November2011 Page541

D‐LinkUWSUserManual

DTIMPeriod TheDeliveryTrafficInformationMap(DTIM)messageisanelementincludedinsome

Beaconframes.Itindicateswhichclientstations,currentlysleepinginlow‐power

mode,havedatabufferedontheaccesspointaw aitingpick‐up.

TheDTIMperiodyouspecif y indicateshowoftentheclientsservedbythisacce

ss

pointshouldcheckforbuffereddatastillontheAPawaitingpickup.

SpecifyaDTIMperiodwithinthegivenrange(1–255).

Themeasurementisinbeacons.Forexample,ifyousetthisfieldto1,clientswill

checkforbuffereddataontheAPateverybeacon.Ifyousetthisfieldto10,cli

ents

willcheckonevery10thbeacon.

BeaconPeriod Beaconframesaretransmittedbyanaccesspointatregularintervalstoannounce

theexistenceofthewirelessnetwork.Thedefaultbehavioristosendabeaconframe

onceevery100milliseconds(or10persecond).

TheBeaconIntervalvalueisse

tinmilliseconds.Enteravaluefrom20to2000.

LoadBalancing Ifyouenableloadbalancing,youcancontroltheamountoftrafficthatisallowedon

theAP.

LoadUtilization Thisfieldallowsyoutosetathresholdforthepercentageofnetworkbandwidth

utilizationallowedontheradio.Oncethelev

elyouspecif y isreached,theAPstops

acceptingnewclientassociations.Enterapercentageofutilizationfrom1to100.

MaximumClients Specifythemaximumnumberofstationsallowedtoassociatewiththisaccesspoint

atanyonetime.

Youcanenteravaluebetween0and200.

AutomaticChannel Thechanne

ldefinestheportionoftheradiospectrumthattheradiousesfor

transmittingandreceiving.Therangeofchannelsandthedefaultchannelare

determinedbytheModeoftheradiointerface.

WhentheAPboots,eachAPradioscanstheRFareaforoccupiedchannelsand

selectsachannelfr

omtheavailablenon‐interferingorclearchannels.However,

channelconditionscanchangeduringoperation.

EnablingtheAutomaticChannelmakestheradioofAPsassignedtothisprofile

eligibleforauto‐channelselection.Youcanautomaticallyormanuallyruntheauto‐

channelselectionalgorithmtoallowtheDWS‐4000Seriessw

itchtoadjustthe

channelonAPsasWLANconditionschange.

Bydefault,theglobalauto‐channelmodeissettomanual.Toenabletheautomatic

channelselectionmode,gototheWLAN>Administration>APManagement>RF

ManagementpageandselectFixedorIntervalfortheChannelPlanmode.Yo

ucan

alsoruntheautomaticchannelselectionalgorithmmanuallyfromtheManual

ChannelPlanpage.

Note:IfyouassignastaticchanneltoaradioofanAPintheValidAPdatabaseoron

theAdvancedAPManagementpage,theAPradiowillnotparticipateintheauto‐

annelselection.

AutomaticPower ThepowerlevelaffectshowfaranAPbroadcastsitsRFsignal.Ifthepowerlevelis

toolow,wirelessclientswillnotdetectthesignalorexperiencepoorWLAN

performance.Ifthepowerlevelistoohigh,theRFsignalmightinterferewithother

APswithinra

nge.

AutomaticpowerusesaproprietaryalgorithmtoautomaticallyadjusttheRFsignal

tobroadcastfarenoughtoreachwirelessclients,butnotsofarthatitinterfereswith

RFsignalsbr oadcastbyotherAPs.Thepo werlevelalgorithmincreasesordecreases

thepowerlevelin10%incrementsbasedonpresenceorabs

enceofpacket

retransmissionerrors.

Table326:RadioSettings(Cont.)

Field Description

D-Link DWS-4026 Руководство пользователя. Версия 2.0 онлайн [541/741] 172936

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