Miraz Al-Mamun, Gour C. Karmakar, and Joarder Kamruzzaman Gippsland School Information Technology, Monash University, VIC 3842, Australia {miraz.mamun, gour.karmakar,

. Multitudes of wireless nodes need to access the same access points.. Collision increases as a result.. So, contending nodes need to choose access probability following non-uniform probability distribution.. Contenders also need to estimate contender population for optimal access probability

.Each application requires a corresponding packet transmission success probability.. Based on this, access probability at each Time Slot(TS) in the Contention Window(CW) is calculated.. Each node accesses the medium with this probability.

. As CW dictates latency, it needs to be optimized as well. Optimization technique has been used to satisfy success probability and latency simultaneously.

Requires: N= initially estimated contender number K= CW size α= Common ratio of geometric function Define: variable i, array N i For (i=1; i<K ; i++) If (i==1) N i =N Calculate p i Select TS with probability p i Break if transmit Else N i = α N i-1 Calculate p i Select TS with probability p i Break if transmit End if End for If (i==K and silence in earlier TS and backlogged) Transmit End if

Some performance figures: Response Time Comparison for Different Numbers of Reports Required (R).

Some performance figures: Throughput Comparison for N=32.