Improving the MAC layer performance of Ad Hoc Networks by congestion control algorithms

Abstract

Wireless Ad Hoc Networks have experienced great improvement over the past decade. However, IEEE 802.11 DCF, as the standard for Ad Hoc Networks, is still greatly influenced by hidden and exposed node problems. Lots of researches have been performed to solve them, but only a few of them have addressed the tradeoff between the two problems. This paper tries to balance the two problems by distributed terminal coordination. We will present two MAC schemes that import the concept of congestion control algorithms. A model between carrier sensing range and congestion window size is established. According to the simulation results, it is shown that these schemes can achieve good MAC layer performance in terms of one-hop throughput, fairness and speed of throughput convergence.