The Research Of The Zone Routing Protocol Based On Cluster

With the development of communication technology, mobile communications are more and more important, the dependence of the mobile communications to people is strengthening, in response to the development, ad hoc network is designed out.Ad hoc network is a special wireless communication network that have no fixed infrastructure, because of the convenience, quickness and robust, the ad hoc network can be applied to disaster relief, military mobile communications.Ad hoc network is a wireless multi-hop network, and the nodes with wireless devices in the network need to forward the data, so the routing in the ad hoc network is an important research direction. Traditional routing protocols is no longer adapt to the ad hoc network, we must design new routing protocol to the new technology.The existing ad hoc network routing protocols are divided into three categories:proactive routing protocols, reactive routing protocols and hybrid routing protocols. They each have own advantages, proactive routing protocols work on the network which is relatively stable, reactive routing protocols run on the network where the nodes often move and little traffic, hybrid routing protocols are different, it combines the advantages of the protocols above, and it can provide a best network performance. ZRP routing protocols is a typical representative.Under the normal circumstances, the ZRP routing protocols is based on the hops to divide the network, in the zone of ZRP adopts proactive routing protocols, in the inter-zone of ZRP adopts reactive routing protocols, using this approach, ZRP can make the different protocols worked in different scope, which gives full play to their advantages. It is a ideal way to routing for ad hoc network, but there still are some disadvantage, such as, the zone generating algorithm of ZRP is not unreasonable, each node need generates a zone by itself as the center, that makes partition to unreasonable, in addition, there exist the routing redundancy situation in the forward which affects the performance of network. Therefore, by researching the ZRP routing protocol and introduce the main protocols of the ad hoc network, this paper focuses on the working principle of ZRP routing protocol. For the above shortcomings, an improved protocol is presented to improve the ZRP routing protocol in this paper, the improved protocol is called C-ZRP. By changing the zone generating algorithm, the nodes on longer enter the overlap zone repeatedly, thus reducing the number of routing tables in the nodes, the broadcast packets generated by route lookup and lowering the routing overhead. In addition, the geographical information is introduced to trigger the route updating, which lowers the network overhead. On this basis, using NS2 to simulate, the result of the simulation testing with ZRP and C-ZRP shows that C-ZRP has a distinct advantage in controlling the routing overhead, average delay and the network overhead.