To overcome the problem, faced by Bottigliengo et al. [13], equalising channel access between uplink and downlink flows is achieved using the design of a channel-aware scheduling scheme along with an adaptive Contention Window (CW) setting at the AP.
Note that, without this constraint, one could increase the integration time of the detector in the CW set-up and obtain infinite signal to noise ratio (and infinite precision).
If the sender receives a new ACK or duplicate ACKs with the congestion warning (CW) bit set in a congestion avoidance phase, it invokes the rate control, in which and are set to the estimated available bandwidth.
At the first transmission attempt, CW is set to minimum value of 8 and if transmission attempt fails then its value gets double, and again set to minimum value on successful transmission.
In this study, the initial value of CW is set to CWmin (the minimum CW).
Initially, the contention window size CW is set equal to the minimum value CWmin.
In this study, the initial value of cw is set to cwmin (the minimum contention window) and the "cw" value will be doubled when the packet transmission fails.
When cw is set to 31, the nodes will have 100% probability of remaining in the same channel (if the backoff value is 0 or 31, then 0 mod 31 = 0 and 31 mod 31 = 0).
When cw is set to 511, the nodes will have a 50% probability of remaining in the same channel (the backoff value is 0) and a 50% chance of switching to the next 15 channels (if the backoff value is 511, then 511 mod 31 = 15).
When cw is set to 63, the nodes will have 50% probability of remaining in the same channel (backoff value is 0) and a 50% chance of switching to the next channel (if the backoff value is 63, then 63 mod 31 = 1).
Underlying mass and 0.5 mm margins where ablated with CW mode setting ranging from 6 12 W power output and 0.4 mm SD.
