Malicious Node Tolerant Packet Forwarding Mechanism for Intermittently Connected Wireless Network

Packets in ICWN (Intermittently Connected Wireless Network) are delivered in a cooperation manner between nodes, which means the existence of malicious nodes will degrade the network performance. A malicious node tolerant message forwarding mechanism is proposed in this paper. By exploiting the historical node behavior information, directly observed information is combined with the recommendation information from neighbor nodes to perceive malicious node behavior according to the dynamical reputation threshold. Consequently, evidence theory is utilized to quantify the node relation to detect malicious nodes, and then the optimal relay nodes selecting can be achieved. Results show that, under the attack of collaborating malicious nodes, malicious nodes can be accurately identified by the proposed mechanism, which leads to the notably improving packet delivery ratio and average delay.