The Analysis and Improvement of S-MAC Protocol for Wireless Sensor Networks Sensor Networks
Lin Zuan-hui · Computer engineering & Software · 2011
Nowadays Wireless Sensor Networking(WSN) has been widely used because of its adaptivity,mobility and scalability.The MAC protocol is one of the most important network protocol which guarantees the WSN communication efficiency.The major concern of this paper is the typical contention-based MAC protocol in WSN—the S-MAC protocol.Considering the backoff algorithm of S-MAC protocol cannot resolve the fairness problem for nodes communication,the BDQR (Backoff Depends on Queue and Retry) backoff algorithm was presented in this paper.The simulation results demonstrated that by using this algorithm,the nodes can escape crowded contention window promptly when transmission is failed,The optimal transmission of Windows could be kept as well aslocating and solving the network congestion regional issues after a successful delivery.By using this protocol,node communication fairness was improved,channel collisions were reduced while network lifespan was prolonged.