Research On Wireless Mesh Networks Secure Routing Mechanism Based On Dynamic Reputation

With the development of wireless communication technology,a variety of new wireless networks emerge one after another.Wireless Mesh Network(WMN)evolving from Mobile Ad Hoc Network(MANET)is widely used in many areas of production and life for its self-organization,self-repair,scalability and easy deployment.Wireless Mesh network is generally composed of Mesh router nodes and Mesh client nodes,and each node has the functions of routing and forwarding.In order to ensure the normal communication of wireless Mesh network,the secure routing mechanism is indispensable.Most of the existing wireless mesh network routing mechanisms can only effectively transmit data,but can not effectively identify internal malicious nodes with packet loss behavior,which leads to the threat of routing security.Firstly,the architecture and characteristics of wireless Mesh network were summarized by this paper.On the basis of this,the characteristics and design requirements of wireless Mesh network routing protocol were summarized.The characteristics of the existing typical wireless Mesh network routing protocols were analyzed,and the security threats faced by wireless Mesh network routing protocols were summarized.Secondly,a secure routing mechanism based on dynamic reputation(SRMDR)is proposed.The dynamic reputation mechanism was used to evaluate the node's behavior,and the node's direct reputation value was calculated based on the node's forwarding behavior of data packets and the link quality.The node's comprehensive reputation value was calculated according to the node's direct reputation value and the recommended reputation value.The node's dynamic reputation value was calculated according to the node's historical comprehensive reputation value and the current comprehensive reputation value.Then,the source node sent the route request message to initiate the route establishment process.Malicious nodes were identified and isolated according to the comparison between the nodes' dynamic reputation value and the threshold,and the path with the highest dynamic reputation value of the nodes was selected to establish the route.Besides,the nodes periodically updated the neighboring nodes' dynamic reputation value and compared it with the threshold.When the new malicious nodes were identified,the source node re-initiated the route establishment process to implement the route maintenance.Finally,the performance of the SRMDR mechanism was verified by simulation.SRMDR was compared with Hybrid Wireless Mesh Protocol(HWMP)and secure routing protocol for wireless mesh network(SRPM).The comparative experimental results show that SRMDR has high malicious node recognition rates.SRMDR can also effectively improve network throughput and packet transmission rate,and ensure network routing security.