An advanced wireless medium access backoff algorithm for MANETs

Wireless networks have experienced sudden improvements from the past decade, and most rapidly developing areas are MANETs. In this paper, we propose an improved backoff scheme for IEEE 802.11 MAC based on Padovan Sequence. A MAC protocol used to address how to resolve the contention and collisions in the communication medium, we performed study and analysis on the existing PBA and BEB algorithms and proposed advanced backoff algorithm (ABA) implemented in IEEE 802.11 in distributed coordinated function mode for better improvement. The ABA reduces the number of collisions, when more than one node shared the medium and leads to the improved network performance. Existing binary exponential backoff algorithm has been proven not to be the optimal algorithm in MANETs due to the exponential increase of the contention window size and degrades the network performance by waiting time. The proposed ABA minimizes the size of contention window and improves the network performance.