An Entropy-Based Long-life Multipath Routing Algorithm in MANET

Mobile ad hoc networks (MANET) are comprised of mobile nodes that are communicating via either directed wireless links or multi-hop wireless links through a sequence of intermediate nodes. The multipath routing in mobile ad hoc networks is difficult because the network topology may change constantly, and the available alternative path is inherently unreliable. So far, much of the effort of multipath routing has been focused on using the predefined alternate path when a relay on the primary path has failed regardless of the availability of the alternate path. This reactive route handoff can increase the overhead for frequent route discoveries. This paper proposes a novel Entropy-based Long-life Multipath Routing algorithm in MANET (ELMR). The key idea of ELMR algorithm is to construct the new metric-entropy and select the stability multipath with the help of entropy metric to reduce the number of route reconstruction so as to provide QoS guarantee in MANET. It is typically proposed in order to increase the reliability of data transmission or to provide load balancing. The simulation results show that the proposed approach and parameters provide an accurate and efficient method of estimating and evaluating the route stability in dynamic MANETs.