PERFORMANCE ANALYSIS OF THE VARIABLE BACKOFF EXPONENTIAL ALGORITHM FOR IEEE 802.11 BASED MOBILE AD HOC NETWORKS

Abstract

Abstract In this paper, an IEEE 802.11 based mobile ad hoc network (MANET), a network node is accessed by a common wireless channel through the distributed coordinate function (DCF), which is provided at the medium access control (MAC) layer of the IEEE 802.11 standard. In this paper, a history based adaptive backoff exponential algorithm is used, through which we can find packet collision probability, average contention window, average number of backoff and average time delay. Moreover we have to find the optimal value of packet collision probability, average contention window, average number of backoff and average time delay with respect to number of nodes using a developed mathematical model. Keywords: IEEE 802.11 standard, History based adaptive backoff (HBAB), Mobile ad hoc networks.