Hi All, I am interested in calculating the overall channel utilization in wireless networks by different routing protocols. Specifically I want to look at a node and see how much of the time, it finds that the channel is busy ( i.e. either the node itself is transmitting or receiving or some other node is transmitting and our node cannot Tx). I am interested in how different proactive and reactive routing protocols perform vis à vis this parameter.
To calculate this, I used a patch from PBM's site. What it does is basically create a timer and when the timer expires, the handler function calls isIdle() to check if the channel is idle or not and then saves the result in a file. I am finding that the results do not match the expected theoretical results. The results are showing a lower value of channel utilization. My initial reaction was that perhaps isIdle() doesn't take into consideration the backoff in 802.11 however I can't find any support for this idea. Does anyone have any suggestions? or another way to measure the channel utilization. Kind Regards, Yasser
