Energy efficient collision avoidance MAC protocol in wireless mesh access networks

Abstract

In wireless mesh access networks, ad hoc and infrastructure modes are both used to support multi-hop data transmission for mesh clients. The traffic will accumulate when it get close to the mesh router and makes collision more likely to happen. This phenomenon severely degrades system throughput and increases the access delay. At the same time, huge amount of energy is wasted on both sides of sender and receiver in transmitting and receiving the collision (overlapping) packets. In this paper, a contention-based medium access control protocol, double sense multiple access - single channel (DSMA-S) is designed to alleviate the packet collision problem, so as to guarantee the throughput performance and reduce the corresponding energy wastage. A rigorous mathematical model is developed for performance analysis with simulation results perfectly match.