Collision Avoidance and Minimization of Delay using CSMA/CA with Jam Signalling in MANET

Abstract

Medium access control protocol plays an important role in providing fair and efficient allocation of limited bandwidth in wireless mobile ad-hoc network. The basic medium access model in the IEEE 802.11 standard, known as DCF (Distributed Coordination Function), is widely used in wireless LANs and MANET, but 802.11 base we cannot remove the collision and we get maximum data drop through collision and there arises the problem of retransmission of collision packet and this collision gradually increases the overhead of the network. Hence we propose a method using CSMA/CA with jam signal that provide the sufficient information to the sender about congestion and channel shared node information and avoid the collision condition. We also analyse the behaviour of TDMA, 802.11 and our proposed CSMA/CA with jam signalling technique, and get the results using simulation based on parameters like routing load, packet delivery ratio, throughput and end-to-end delay .   

Keywords— MANET, DCF, CSMA/CA, Throughput, Packet Delivery Ratio