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D-Link DWC-1000 User Manual 98

Section 4 - Advanced WLAN Conguration

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Field Description

AP Prole ThenameofAPProle

Radio Mode The radio mode. 802.11a/n or 802.b/g/n

Template

SelecttheQoStemplatetoapplytotheAPprole.IfyouselectCustom, you can change

the AP and station parameters. If you select Voice or Factory Defaults, the wireless

controllerwillusethepre‐denedsettingsforthetemplateyouselect.

AP EDCA Parameters

Queue

QueuesaredenedfordierenttypesofdatatransmittedfromAP‐to‐station:

• Data0(Voice)—Highpriority queue,minimumdelay.Time‐sensitivedata such as

VoIPandstreamingmediaareautomaticallysenttothisqueue.

• Data1(Video)—High priorityqueue,minimum delay.Time‐sensitivevideodata is

automatically sent to this queue.

• Data2(besteort)—Mediumpriorityqueue,mediumthroughputanddelay.Most

traditionalIPdataissenttothisqueue.

• Data 3 (Background)—Lowest priority queue, high throughput. Bulk data that

requiresmaximumthroughputandisnottime‐sensitiveissenttothisqueue(FTP

data,forexample).

AIFS (Inter-Frame Space)

TheArbitrationInter‐FrameSpacing(AIFS)speciesawaittimefordataframes.Thewait

time is measured in slots. Valid values for AIFS are 1 through 255.

cwMin (Minimum

Contention Window)

This parameter is input to the algorithm that determines the initial random backo

waittime(window)forretryofatransmission.ThevaluespeciedhereintheMinimum

ContentionWindowistheupperlimit(inmilliseconds)ofarangefromwhichtheinitial

randombackowaittimeisdetermined.

The rst random number generated will be a number between 0 and the number

specied here.

Iftherstrandombackowaittimeexpiresbeforethedataframeissent,aretrycounteris

incrementedandtherandombackovalue(window)isdoubled.Doublingwillcontinue

untilthesizeoftherandombackovaluereachesthenumberdenedintheMaximum

Contention Window.

Valid values for the cwmin are 1, 3, 7, 15, 31, 63, 127, 255, 511, or 1024. The value for

cwmin must be lower than the value for cwmax.