Abstract:

Ad-hoc network is a centerless peer-to-peer network. Nodes in the network have equal status. Nodes can join or leave the network at any time without centralized management. This makes the network vulnerable to various internal attacks, the most common of which is routing attack. At present, the effective way to deal with such attacks in academia is to propose a suitable trust model for nodes and apply it to various routing protocols. The common problem in existing trust models is that it is impossible to integrate reasonably all kinds of decision-making factors for calculating the trust values of nodes. This paper proposes a trust model, which synthesizes two factors by using the fuzzy logic theory, and obtains the trust values of nodes after de-fuzzification. This paper applies trust model to the routing establishment and maintenance of multicast routing protocol MAODV, and proposes a routing protocol MTAODV. The simulation results show that MTAODV can effectively improve the transmission rate of data packets in the network at the cost of end-to-end delay and slightly increased routing overhead.

Key words: Ad-hoc network, routing attack, trust model, fuzzy logic