Improving Accuracy of Bandwidth Estimation Based on Retransmission Predicting in MANET

To attain the available bandwidth accurately can make the ad hoc network resources being used effectively. A novel link available bandwidth estimating method based on frame retransmission predicting is proposed, where the average size of contention window is used to evaluate frame numbers that need to be retransmitted; moreover, combining with the backoff process information locally recorded, the estimation procedure is accomplished with the method of cooperation between mobile nodes. Simulation results show that the method based on the average size of contention window can evaluate link collision status; consequently, this mechanism can estimate link available bandwidth precisely.