Research And Design Of Multipath And Dual-route Collaboration Mechanism Based On HWMP Routing

In the era of the Internet,the network has penetrated into all aspects of life.With the launch of various technological products,people’s demands for the network are becoming increasingly high.At the same time,Wireless Mesh Network(WMN)technology,which combines traditional WLAN technology and Ad hoc network technology,can provide a wide coverage area and high-performance network services,making it a hot research topic in the field of communications.In special environments such as military communications,emergency relief,and environmental monitoring,WMNs require higher network reliability and better network performance.To fully utilize the advantages of WMNs,the supporting technologies of WMNs should be designed and improved according to different usage scenarios.This thesis aims to improve routing protocols to enhance network reliability,reduce network latency,and increase information throughput.The main work is as follows:For complex application scenarios,the Hybrid Wireless Mesh Protocol(HWMP)is improved,and backup path mechanism and multi-path routing update algorithm are proposed.A multi-path routing improvement scheme based on HWMP is designed,which improves the four modules of path discovery,path maintenance,path selection,and routing self-healing.Frame contents for path request and path reply are added based on the multi-path characteristics to quickly discover and record backup path information outside of the main path.Through the backup path mechanism,when a fault occurs at the main path node or link,it can quickly jump to the backup path to solve the problem of information loss and blockage.At the same time,through the routing update algorithm,new paths that do not intersect with existing paths or nodes can be discovered,achieving forward and reverse multi-path updates,ensuring that the recorded paths are fast and low-cost.For the HWMP protocol has two routing mode features,A dual-routing collaboration mode is proposed,which takes the tree-based proactive routing mode as the backbone and distinguishes whether the destination node and the source node are in the same network by adding a node tag field.After transmitting data for the first time,the root node can choose whether to use the on-demand routing mode based on different node tag fields.The routing established by the collaborative mode can create the optimal path through the on-demand routing and has a proactive routing tree topology.Compared with proactive and on-demand routing,the dual-routing collaboration mode can reduce end-to-end latency and increase information throughput.The above protocols are simulated using the NS3 network simulator.The simulation results of the multi-path routing protocol show that in the case of non-intersecting links and nodes,the HWMP multi-path routing protocol can effectively solve problems such as information blockage caused by node failures,long data recovery time,and high packet loss rate.The simulation results of the dual-routing collaboration mode show that regardless of whether the destination node and the source node are in the same Mesh network,the HWMP dual-routing collaboration mode can reduce initial routing establishment delay,reduce path end-to-end latency,and increase path information throughput.