A Novel Backoff Algorithm for Ad hoc Networks

In order to increase the access ability of high-level node in wireless ad hoc network, a novel binary negative exponential backoff (BNEB) algorithm is proposed. In this algorithm, the high-level node sets its contention window (CW) to the minimum CW of normal nodes after successful transmission, and reduces its CW as times of retransmission increased. The simulation results show that the BNEB algorithm can remarkably increase the access ability of high-level node and reduce the end-to-end delay.