Improved Back-off Algorithm of Ad Hoc Network

Because of Binary Exponential Back-off(BEB) back-off Algorithm,if one node gets the channel successfully,it will be easier to get the channel next,so that the unfairness problem of the network will appear.A new back-off algorithm is presented in this paper to solve the unfairness problem.In NTFBA,the minimum of back-off window adjusts for nodes throughput nearby.The node watches the average of the through-put of the nodes nearby,compares with its through-put,and then adjust minimum of back-off window.The Simulation results show that the new algorithm can improve the fairness of the network,enhance the performance of the network.