Research On Routing Protocol And Congestion Control For Ad Hoc Network

A mobile Ad Hoc network (MANET) is a collection of wireless mobile nodes dynamically forming a temporary multiple-hop network without the use of any central controller or existing net-infrastructure. In this condition, due to the limitation of the transmission range, nodes which could not communicate with each other directly must use another node to deliver the packet.In this thesis, a novel routing protocol based on AODV is proposed. The protocol takes full use of control messages to establish a multi-path reserved routing table but simply throws them away. While congestion happens, the reserved routing can be used to transmit datagram without restarting the routing finding process. The simulation result shows that MR-AODV performs well in delay and routing spending under heavy network road.A game model for congestion control with the rule of Active Queue Management (AQM) and the condition for Nash Equilibrium are also presented. That Drop-Tail and RED do not impose a Nash Equilibrium is proved, and CHOKe can impose a nearly Nash Equilibrium. A new scheme that can impose Nash Equilibrium is also presented.