Abstract

MANET consists of several wireless mobile nodes which dynamically exchange data among themselves without the reliance on a fixed base station or a wired backbone network. Multipath routing allows the establishment of multiple paths between a pair of source and destination node. It is typically proposed in order to increase the reliability of data transmission or to provide load balancing and has received more and more attentions. Multipath routing protocol based on DSR protocol, which incurs only 2n control packets for a route discovery and does not require new types of control messages over DSR. We propose a scheme to improve existing on-demand routing protocols by creating a mesh and providing multiple alternate routes. Their algorithm establishes the mesh and multipath without transmitting any extra control message. Specifically, the proposed DSR uses the channel average nonfading duration as a routing metric to select stable links for path discovery, and applies a preemptive handoff strategy to maintain reliable connections by exploiting channel state information. DSR utilize the multipath functionality at each hop.