Efficient on demand routing protocol to optimize throughput in MANET

Abstract

Throughput oriented route selection is still a challenging task due to several constraints of ad-hoc networks such as absence of central control, dynamic network topology, selfish nature of nodes, etc. A routing protocol produce optimum results if it prioritizes wireless links on the basis of link quality and consider high quality/ efficient links at the time of path selection. Proposed protocol discovers high quality/ efficient links and connects those links to establish efficient route in mobile ad-hoc network that leads to high Aggregate Network Throughput. This work has been done by estimating every link’s ENT (Expected Number of Transmission) value as QoS parameter and considering qualifying high capacity/efficient links to communicate data packets. To estimate ENT value of each link, variability in packet loss rate on that link is observed in simulation experiments. Probability of errors in transmission is estimated at bit level. Results are stochastic and high fluctuations observed in packet loss rate hence σ2 (i.e. packet loss variance on a wireless link) included in link quality estimation. In proposed protocol EODRP (Efficient On Demand Routing Protocol) link quality based route metric ENT, selects QoS qualified wireless links during route computation and routing information disperse through reactive routing protocol. Simulation results have been analyzed and compared with MXAODV [7] which indicates significant improvement in network efficiency in terms of throughput and other parameters.