RTC: A Reputation-based Technique for Cooperation Enforcement in Ad Hoc Networks based on TCP Congestion Control Mechanism

摘要

Multihop ad hoc networks were designed assuming trustworthiness and cooperation between all participating nodes; nodes in an ad-hoc network rely on one another in packet forwarding, detecting routes, etc. Thus, the performance of an ad hoc network degrades considerably with the presence of misbehaving nodes. Nodes' misbehaviour includes, but is not limited to, refusing to relay data packets, control packets or even sending false information. In this paper we focus on selfish nodes, which are more concerned about saving their resources than they are about the network's good. We are proposing a reputation-based technique that punishes selfish nodes, by probabilistic dropping of packets destined to such nodes based on their reputation. Punishment is done to encourage selfish nodes to cooperate in relaying data packets, and thus our technique decreases the overall percentage of packet loss in the network by saving packets from being selfishly dropped.