关键词: 无线传感器网络, 自私节点, 博弈论, 信誉, 能量

Abstract: In wireless sensor networks, due to the energy and resource constraints, a node may be unwilling to forward packets for its neighbors. In this paper, it studies the selfish behaviors of selfish nodes in wireless sensor networks. Specifically, it models the interactions of sensors as a game. It also presents a utility function based on reputation and energy consumption of nodes to monitor the malicious and selfish nodes. To encourage cooperation among nodes, in the proposed algorithm, nodes succeeding in forwarding can gain reputation as a reward while those who act selfishly will lose reputation as a punishment. With incentive mechanism in the algorithm, the malicious nodes are isolated, and the behaviors of selfish nodes can be restricted by acting more cooperatively.

Key words: wireless sensor network, selfish node, game theory, reputation, energy