D-Link DWC-1000 [95/368] Channel

D-Link DWC-1000 User Manual 95

Section 4 - Advanced WLAN Conguration

Field Description

Short Guard Interval

Theguardintervalisthedeadtime,innanoseconds,betweenOFDMsymbols.Theguard

intervalpreventsInter‐SymbolandInter‐CarrierInterference(ISI,ICI).The802.11nmode

allows for a reduction in this guard interval from the a and g denition of 800 nanoseconds

to400nanoseconds.Reducingtheguardintervalcanyielda10%improvementindata

throughput.

Select one of the following options:

•ON=TheAPtransmitsdatausinga400nsguardIntervalwhencommunicatingwith

clients that also support the 400 ns guard interval.

•OFF=TheAPtransmitsdatausingan800nsguardinterval.

Space Time Block Code

Space Time Block Coding (STBC) is an 802.11n technique intended to improve the

reliability of data transmissions. The data stream is transmitted on multiple antennas so

the receiving system has a better chance of detecting at least one of the data streams.

Select one of the following options:

• ON=TheAPtransmitsthesamedatastreamonmultipleantennasatthesametime.

• OFF=TheAPdoesnottransmitsthesamedataonmultipleantennas.

Radio Resource

Management

Radio Resource Measurement (RRM) mode requires the Wireless System to send

additionalinformationinbeacons,proberesponses,andassociationresponses.Enableor

disablethesupportforradioresourcemeasurementfeatureintheAPprole.Thefeature

is set independently for each radio and is enabled by default.

No Ack

SelectEnabletospecifythattheAPshouldnotacknowledgeframeswithQosNoAckas

the service class value.

Multicast Tx Rate (Mbps)

Selectthe802.11rateatwhichtheradiotransmitsmulticastframes.TherateisinMbps.

Thelowestrateinthe5GHzbandis6Mbps.

Channel

Auto Eligible Channels

This eld displays the channels that are supported for the radio mode currently selected

onthepageandforthecountryconguredontheGeneralSettingspage.PressCrtlto

select multiple channels.

Basic Rate Set (Mbps)

These numbers indicate the data rates that all stations associating with the AP must

support.

Supported Rate Set (Mbps)

These numbers indicate rates that the access point supports. You can select multiple

rates.TheAP automaticallychoosesthemostecient ratebasedon factorslikeerror

ratesanddistanceofclientstationsfromtheAP.