Research Of Routing Protocol In Ad Hoc Network

Ad Hoc network is a temporarily and fast self-organized mobile network. The mobile terminals have routing ability as well as abilities ordinary terminals have. Communication between terminals may go along several intermediate terminals, it is said as multi-hop. This is the essential difference with other networks. Because it is infrastructureless and self-organized, Ad Hoc network is increasingly become the hotspot of wireless network. However, the mobility and characteristic of wireless channel result in instable network topology, which makes research to focus mainly on routing protocol.This thesis is mostly about the research of routing protocol in Ad Hoc network. It researches all kinds of routing protocols, and chooses Dynamic Source Routing (DSR) protocol to make improvement. DSR protocol is a widely accepted on demand protocol. It is with good performance, and also has fault. When it is sending packets, if the route on use becomes disconnected, packet needs to wait for new route, and even is discarded. This thesis uses link stability prediction arithmetic to solve this problem, and proposes an improved protocol called Link Stability Prediction Dynamic Source Routing (LSP-DSR) protocol. The key of this protocol is the link stability prediction arithmetic, which estimates the stability of route and will search new route for switch. This thesis uses OPNET to make simulation, and at last also uses MATLAB to make simulation. Simulation result shows that LSP-DSR protocol decreases the delay, decreases the packet loss ratio and improves the network performance. The research has important meanings for farther research in self-organized mobile network.