Research On Dht-based Routing For Mobile Ad Hoc Networks

The focus of the research about MANET is the routing protocol design of network layer. MANET and P2P networks share a good number of key characteristics, and Distributed Hash Table (DHT) has recently proven themselves an efficient building block for distributed applications. How to design structured P2P overlays for MANET has attracted large amounts of research.A lot of routing models about the integration of DHT and MANET have been proposed, but MANET is very different from Internet and DHT is defective, the conventional DHT are not well-suited for direct deployment in MANET and the integration of DHT and MANET is still an open research area.A new DHT based routing model for MANET is proposed in this paper. In this model, the virtual coordinates based dynamic clustering algorithm is proposed in order to solve the topology-unmatched problem, the path stability is improved by predicting path lifetime and path lifetime of two node will be considered when k-buckets are undated. A common logical topology is maintained by altered kademlia and SAODV protocol. The results of simulation show that the three key indexes namely path length, delivery ratio of packets and control packet overhead are satisfactory.