Research On HWMP Routing Protocol Based On Mesh Network

Wireless Mesh network (WMN) is a new type of grid network, which combines the characteristics of traditional WLAN and Ad Hoc network. At present, the research on Mesh network routing protocols mainly focus on the routing criteria, the link self-healing, and the route of on-demand multipath routing. Hybrid multipath routing has a very high application value in reducing network delay and improving network throughput. In order to improve the network performance, this paper makes a deep research on the routing algorithm of wireless Mesh network. The main work is as follows:The multipath HWMP routing algorithm is proposed. The method can establish independent multipath by once path detection. Through the research of AODV-BR and AOMDV routing algorithm, the advantages of multi-path routing algorithm in network throughput, routing fault tolerance, and reduce the network delay is found. In terms of AOMDV routing protocol, the performance of the single path HWMP is improved.And the multipath HWMP routing algorithm is designed. In order to find independent path, the information of the first hop and the next hop need to be judged.A fast transmission mechanism based on AODV-BR is proposed. When the path failure is detected, the local network node will start the PERR mechanism, and forward PERR packet to source node through precursor. The source node starts backup path to transmit data after receiving the notification error.In order to improve the transmission rate and reduce the network delay, a method for fast processing of the fault nodes is proposed. The fault node is directly looking for alternative routing information, and then forward PERR to source node.NS-3 network simulator is used to verify the correctness of the shceme in experiments. The experimental results show that the performance of HWMP in the network throughput and end-to-end delay is improved obviously compared with the single path HWMP and multipath HWMP routing protocols.