A Modified AODV Protocol with Multi-paths Considering Classes of Services

In ad-hoc environments, a set of mobile nodes may construct a network to communicate with one another. Due to the movement of mobile nodes, the topology of ad-hoc networks can vary frequently as time goes by. This may result in the disruption of existing routes, and data being transferred through the disrupted routes may be lost until new routes are established. Considering the situations, we propose a routing protocol providing multiple paths in order to reduce lost packets due to the disconnection of existing routes. In our protocol, the number of multiple routes between a source node and a destination node is determined according to service classes. We evaluate the performance of the proposed protocol and compare with that of the AODV protocol via simulations. The results show that the proposed protocol can reduce the packet loss ratio and the volume of routing messages compared with the conventional AODV.