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WIFI

694 Ķ2011-5-29 09:56 |

802.11b/g/nܹ2.4GISMܻšŵĵӦ֮һVOIPֻWLANVOIP绰ͨŵĺûܸоͨ½
Щܹ໥ţάwifithroughputʹûʹ鲻Ӱ졣ҪAFHͷʱ
Ƿ໥ź໥ǷӰ죺
1߻ǵԼ
2
3ͨƵǷwifi
4wifiǽջǷ
5wifiľӦõͨص
߻ǵԼ
wifiʹõߣߺwifi֮ĸСӰŵij̶ȡΪһĸȣwifiǿͬʱ߽յġ
wifiߣwifiͬʱ໥ţͬʱա

ŷΪ֡һҪƵʳͻʱһǴźƵǷͻûйϵ;ƵƼ߼йϵ
ͨƵǷwifi
ͨƵwifiƵڣźŶСͨƵwifiƵ⣬ֻš
AFHõķwifiܶά100Ψһ޷š
wifiǽջǷ
wifiʹԼߣwifiܹͬʱͬʱյġһ䣬һգƵʳͻʱ໥š⣬ͬʱܻһ豸š
wifiľӦõͨص
ʱ໥Ƿػ;ӦʱͨصйءǷǷǷtimecriticalġеhostԸݲͬӦòͬȼԴﵽõtradeoff

ҪƷ򵥽:
AFH
AFHǽŵ÷ͨƵƵбܿwifiƵȿԱƵʳͻĸţҲ˿ʧwifiܡ⣬AFHֻwifiţԴҲԱܿ
AFHܰ棬һchannelĺû֣ʹµchannellistƵ
ChannelĺûԴһԼͨscanRSSI߼PERȷʽԼchannelͨ豸ϢmasterȡslaveֽslavemasterֽhostͨHCIset_AFH_host_channel_classification
wifiУhostͨHCIЩchannelǺЧġԼ֣ӦüԼchannelҲҪ豸ϢΪԶܿbadchannelDzͬġ
ʱTDMPTA
ʱwifiźţʹwifiʱ2.4GԱźšǻήwifithroughputӦֻAFHṩЧʱʹá
802.15.2й涨ٲ÷ʽźţPTApackettrafficarbitrationĿܣܶоƬҲԼרеźŶ塣ǵƻҪ˽wifiоƬźŶ塣
ЩźŶࡣ˵£
2wire
Wifiźwl_activeʾwifiͨţźassertedӦֻ/highpriorityİdelay
wifiźbt_priorityʾҪhighpriorityİwifiֹͣǰͨš
ԿźŷֱDZwifiͨŵġassertĶٻӰ2.4G߼ķ䡣
оƬƵĽǶȣоƬֶ֧ڰȼֺdelayĴһ˵ʱͬinquirypageSCOǸȼݵİͨȼϸºܶҪúͿɵģΪҪhostݾӦá
оƬ֪wifiƵbt_priorityҲֻƵʳͻʱ
3wire
߷߷ơһbt_activebt_priorityһԱʾȼͨš
4wire
߷߷ƣٶһbt_freqָʾͨǷwifiƵͻ
PTA
802.15.2ûй涨PTAӲӿںٲжʵֵġҲ2/3/4߷PTAĻ˼wifiύPTAcontrollerһPTAcontrollerwifiУPTAcontrollerɡPTAеźŶָҪIJָͬѾIJ
WCS
WCSintelwirelesscoexistencesystemдintelwifiֶ壬ߣch_datach_clk/bt_priorityֺƵźŴݹܡʱûпҪǩintelNDAУƱʼDZõý϶ࡣ
ֻҪշʱȼtradeoffԭֽӿںͷʱƻкܶ仯ãûõʹ顣
 

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