D-Link DWC-1000 User Manual - Page 83

Wireless Controller User Manual firs t ran d o m 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 do 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 un ter is in cremen ted an d t h e ran d o m b acko ff v alu e (window) is doubled. Doubling will continue until the s ize of the random b acko ff v alu e reach es 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. cwMax (Maxi mum Contenti on Wi ndow) : Th e v alu e s p ecified 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 the doubling of the random backoff value. This doubling continues until eit h er 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 nt il a maximu m n u mb er o f ret ries allo wed is reach ed. TXOP Li mi t: St at io n EDCA Paramet er On ly (Th e TXOP Limit ap p lies o n ly t o traffic flowing from the client s tation to the acces s point.) The Tran s mis s io n Op p o rt u n it y (TXOP) is an in t erv al o f t ime wh en a W M E clien t s t at io n h as t h e rig h t t o in it iat e t ran s mis s io n s o n t o t h e wireles s med iu m (W M ). Th is v alu e s p ecifies (in millis eco n d s ) t h e Tran s mis s io n Op p o rt u nit y (TXOP) fo r clien t s t at ion s; t h at is , t h e in t erv al o f t ime wh en a W M M clien t s t atio n h as t h e rig h t t o in it iat e t ran s mis s io n s o n t h e wireles s n e t wo rk. 81