增加收音机在802.11g网络吞吐量的影响

Theperformanceofthenetworkisacommonconcern

whenmixinglow-speedstationswithhigh-performance

networks.Inrealitytheperformanceimpactis

dependentonthespecificnetworksetupandtraffic

patterns.AcommonmisconceptioninWi-Finetworking

isthataddingan802.11bstationtoan802.11b/g

networkwillbringthewholenetworkdownto802.11b

rates.

Thisapplicationnotedescribesalowvolumeof“b”

trafficwillnotshowperceptibleimpactona“g”network

anditalsousesamathematicalprooftodescribethe

affectofaddingalow-datatransfer802.11bstationand

variousradiosontoan802.11b/gnetwork.Inmany

casestheadditionofan802.11bstationisnotmore

detrimentaltothenetworkthanaddinganother802.11g

station.Inaddition,whileitsbandwidthmayreduce,the

operatingrateoftheoriginal802.11gstationisnot

affectedbyaddingan802.11bradio.

Thisanalysisassumesonlybasicdistributed

coordinationfunction(DCF)betweenstationsthatall

hardwaresupportsinInfrastructuremode.More

efficientmethodslikepointco-ordinationfunctionsor

hybridco-ordinationfunctions(addedtoIEEE802.11-

2007)arenotutilized.Suchoptimizationscanbeused

toreducetheimpactofcertaintraffic.AN1339TheEffectofAddingRadioson802.11gNetworkThroughputAuthor:MarkWrightandSidharthThakurSettinguptheModelMicrochipTechnologyInc.Themodelstartswithacontrolstationonan802.11b/gnetwork.Thecontrolcasehasonlythecontrolstationconnectedwirelesslyonthenetwork.ThemodeldeterminesthemaximumbandwidthcapabilityoftheINTRODUCTIONfoll