Specifications

Radio Interface

RoamAbout RBT-4102 Wireless Access Point Configuration Guide 4-69

Afteracollisiondetection,abackoffwaittimeiscalculated.Thetotalwaittimeisthesumofa

minimumwaittime(ArbitrationInter‐FrameSpace,orAIFS)determinedfromtheAIFSN ,anda

randombackofftimecalculatedfromavalueselectedfromzerototheCW.TheCWvaluevaries



withinaconfigurablerange.ItstartsatCWMinanddoublesaftereverycollisionuptoa

maximumvalue,CWMax.Afterasuccessfultransmission,theCWvalueisresettoitsCWMin

value.

Figure 4-1 WMM Backoff Wait times

Forhigh‐prioritytraffic,theAIFSNandCWvaluesare smaller.Thesmallervaluesequatetoless

backoff

andwaittime,andthereforemoretransmitopportunities.

Using Web Management to Configure WMM

ToconfigureWMM,selectRadioSettingsunderthetypeofinterface(802.11aor802.11b/g)that

youwanttoconfigure,andscrolldowntothe WMMconfigurationsettings.

• WMMsetstheWMMoperationalmodeontheaccesspoint.Whenenabled,theparametersfor

eachACqueuewillbeemployedontheaccess

pointandQoScapabilitiesareadvertisedto

WMM‐enabledclients.Default:Support

– Disable:WMMisdisabled.

AIFS Random Backoff

AIFS

Random Backoff

CWMin CWMax

Time

High Priority

Low Priority

Minimum Wait Time Random Wait Time