Rearch Of Routing Protocol Of Wireless Mesh Network

Wireless mesh network is one of the new kinds of wireless network,and the research of which is also one of the directions of next generationwireless network. Wireless mesh network is emphersized more and moreby the industry with its dynamic self-organization, self-configuration andself-correction characters. Research on the protocol of wireless meshnetwork is significant for the application of the wireless mesh network.First, we analysis the definition and the structure of wireless meshnetwork. And then introduce the challenge and main research direction ofthe wireless mesh network and we also establish the research topic of thisthesis.As a kind of multi-hop relay network, an effective routing protocolis important for the proformance of the wireless mesh network. We haveanalysis the routing protocol used in wireless mesh network widelyrecently in detail, including the proactive, reactive and multi-ratio andmulti-channel routing protocol. And we highlight the reactive protocol,including AODV and AIR, by introducing the details of these twoprotocols.By analyzing the used protocols, we come up with a new improved routing protocol considering the advantage of AODV. In the improvedrouting protocol, we redesign the routing metric by considering the delay,routing load and loss ratio of network. We make great use of the ordinarypacket to collect the state imformation of the network, and try to avoidheavy routing load to make good use of the network resource.The routing protocol in this thesis bases on the ant colony algorithmand we make use of the metric including intelligent and distribution. Wecombine the definition of pheromone with the routing metric, and thedensity of the pheromone indicates the use frequency of the specific link.We probabily select the link with the most pheromone as the next hop. Inthis way, the node in the network can keep sensitive about the state of thenetwork.We use NS2to simulate the improved protocol and AODVrespectively. After comparing, we found that the improved protocol isoverproformanced in the perspective of delay, routing load and loss ratio.