D-Link DWC-1000 User Manual - Page 81

Wireless Controller User Manual  Data 3 (B ack g round): Lo wes t p rio rit y q u eu e, h ig h t h ro u g h p u t . Bu lk d at a t h at req uires maximu m t h ro u gh put an d is n o t t ime -s en sitiv e is s en t t o t h is q u eu e (FTP d at a, fo r examp le). AIFS (Inter -Frame S pace): Th e A rb it rat io n In t er-Frame Sp acin g (A IFS) s p ecifies a wait t ime fo r d at aframes . Th e wait t ime is meas u red in s lo t s . Valid v alu es fo r A IFS are 1 t h ro u g h 255. cwMi n (Mi ni mum Contenti on Wi ndow) : Th is p aramet er is in p u t t o t h e alg o rit h m t h at d et ermin es t he in it ial ran d o m b acko ff wait t ime (win d o w) fo r ret ry o f a t ran s mis sio n. Th e v alue s pecified h ere in t h e M in i mu m Co n t en tion W in d o w is t h e u p per limit (in millis eco n d s ) o f a ran g e fro m wh ich t h e in it ial ran d o m b acko ff wait t ime is d et ermin ed . Th e firs t ran d om n u mb er g en erated will b e a n u mb er b et ween 0 an d t h e n u mb er s p ecified h ere. If t h e firs t ran d o m b acko ff wait t ime exp ires b efo re t h e d at a frame is s en t , a ret ry co u n t er is in cremen ted an d t h e ran d o m b acko ff v alu e (win d o w) is d o u b led . Doubling will continue until the s ize of the random backoff value reaches t h e n u mb er d efin ed in t h e M aximu m Co n t en t io n W in d o w. Va lid v alu es fo r t h e cwmin are 1, 3, 7, 15, 31, 63, 127, 255, 511, o r 1024. Th e v alu e fo r cwmin mu s t b e lo wer t h an t h e v alu e fo r cwmax. cwMax (Maxi mum Contenti on Wi ndow) : Th e v alu e s p ecified h ere in t h e M aximu m Co n t en t io n W in d o w is t h e u p p er limit (in millis eco n d s ) fo r t h e doubling of the random backoff value. This doubling continues until either t h e d at a frame is s en t o r t h e M aximu m Co n t en t io n W in d o w s ize is reach ed . On ce t h e M aximu m Co n t en t io n W in d o w s ize is reach ed , ret ries will co n t in u e u n t il a maximu m n u mb er o f ret ries allo wed is reach ed . Valid v alu es fo r t h e cwmax are 1, 3, 7, 15, 31, 63, 127, 255, 511, o r 1024. Th e v alu e fo r cwmax mu s t b e h ig h er t h an t h e v alu e fo r cwmin . Max. B urs t Leng th: A P EDCA Paramet er On ly (Th e M ax. Bu rs t Len g t h applies only to t raffic flowing from the acces s point to the client s tation.) Th is v alu e s p ecifies (in millis eco n d s ) t h e M aximu m Bu rs t Len g t h allo wed for packet bursts on the wireles s network. A packet burs t is a collection of mu lt ip le frames t ran s mit t ed wit h o u t h ead er in f o rmat io n . Th e d ecreas ed o v erh ead res ult s in h ig h er t h ro ugh put an d b et t er p erfo rman ce. Valid v alu es fo r maximu m b u rs t len g t h are 0.0 t h ro u g h 999 79