QOS Enhanced Hybrid Multipath Routing Protocol for Mobile Adhoc Networks

In Mobile ad hoc networks (MANET), the quality of service (QoS) depends on the available resources inthe network and node mobility as mobility may result in frequent route failures. Some existing hybridapproach of multi-path routing technique rarely considers QoS metrics for path selection. In this paper,we propose a QoS enhanced hybrid multi-path routing protocol for MANET. In this protocol, topologydiscovery is performed proactively and route discovery is performed in the reactive manner. In proactivetopology discovery phase, each node collects the battery power, queue length and residual bandwidth ofevery other nodes and stores in the topology information table (TIT). By exchanging the TIT among thenodes, the topology is discovered. When the source node wants to forward the data packet to thedestination, it utilizes the reactive route discovery technique where the multiple paths are establishedusing multi-path Dijkstra algorithm. When any intermediate node does not recognize the next 2-hopinformation from TIT towards destination, the new multi-path route discovery is performed. By simulationresults, it is shown that the proposed approach reduces the overhead.