Research On Ad Hoc Secure Routing Based On Trust Management Mechanism And Ant Colony Algorithm

Ad Hoc network is a temporary autonomous system composed of mobile terminals.It is a multi-hop,centerless,self-organizing wireless network.Due to its rapid networking,selforganization and other characteristics,Ad Hoc networks are widely used in unmanned autonomous system communications,natural disaster emergency communications and other fields.In recent years,while Ad Hoc network is widely used,people’s demand for its security and service performance is also increasing.In this context,designing an efficient Ad Hoc network security routing protocol has become an important content of Ad Hoc network technology research.At present,most Ad Hoc network security routing protocols are based on cryptography and identity authentication mechanism,and there are problems such as excessive reliance on central nodes or excessive computational costs.In response to the above problems,this paper proposes an AODV secure routing protocol based on trust management mechanism.By designing a trust value evaluation model and a trust value restoration model,the trust management mechanism is realized,and in combination of the trust management mechanism,the related data structure and route establishment and maintenance process of the AODV protocol are modified and optimized.The simulation results show that the trust management mechanism can solve the problem of malicious nodes discarding data packets to a certain extent.Besides,because the secure routing protocol cannot adjust the routing path in real time based on network status information,there is a problem of unbalanced network load.Based on the trust management mechanism,an Ad Hoc network security routing protocol based on ant colony algorithm is proposed.By combining information such as node credit value,node remaining energy,time delay and link available bandwidth,pheromone update model and state probability transition model are designed.In combination of these two models,the data structure and routing establishment and maintenance process of the AODV secure routing protocol based on the trust management mechanism are modified and optimized.The simulation results show that the secure routing protocol based on ant colony algorithm can adjust the routing path in real time through the current network status information to realize the overall load balance of the network.