Cloud Model Based Trusted Routing Technology In Ad Hoc Networks

The mobile Ad Hoc network(simply called MANET)is a wireless,multi hop,temporary,autonomous system composed of a set of mobile terminals carrying wireless transceivers.MANET has many characteristics,such as easy to carry,fast networking and nodes' mobility.The mobile Ad Hoc network is able to be widely used in many fields,such as searching and rescuing,medical aiding,modern battlefield application,office diversification,network teaching and so on,especially the problems existing in the emergency rescue of the fixed mode network.But because of the dynamics of topology,the openness of the communication link and the limited energy of the nodes,the security of the network and the reliability of the routing are greatly threatened.How to establish a secure and reliable routing is a problem worthy of study.The current trust based routing protocol is widely concerned,and plays an important role in solving the problem of establishing trusted networks in dynamic networks.In this paper we focus on cloud based trusted routing protocol in mobile Ad Hoc networks.The main work is as follows:1.Based on the cloud model,a trust value evaluation mechanism on nodes in mobile Ad Hoc network is proposed.Cloud model is a mathematical model in transform between qualitative concepts and their quantitative expressions.Uncertainty,fuzziness and randomness can be represented simultaneously by cloud model,which has obvious advantage in processing the uncertainty of the cognitive concept.Especially,in trust management field,cloud model is able to give attention to subjectivity,fuzziness and randomness of “trust”,which is impossible in other trust models.In this paper the cloud model is used to describe and calculate the two trust factors of the node,that are forwarding rate and remain-energy,the trust level of the node is obtained by comparing the obtained trust degree with the standard trust degree.2.Based on the proposed cloud model trust mechanism,a trusted routing protocol in mobile Ad Hoc networks is proposed.Using cloud model to quantify the remain-energy and forwarding rate of nodes,a more trusted routing against malicious attacks can be selected.3.The performance of the proposed routing algorithm is simulated by NS-3.The experimental results show that the trust degree of the routing is greatly improved when the Ad Hoc network trust routing is designed through the cloud model based trust mechanism,and the network overhead is also greatly reduced.The proposed scheme is secure and effective.