摘要： 根据自私节点的特性，提出节点协作的博弈模型。针对单阶段博弈及采取礼尚往来策略、冷酷策略、单步触发策略的重复博弈，分析并比较实现节点协作的纳什均衡条件。结果表明，单阶段博弈中自私节点的纳什均衡类似于囚徒困境，重复博弈采用礼尚往来策略时，实现最佳纳什均衡的临界值最小，相比其他策略更易实现协作。

关键词: 无线自组网, 节点协作, 博弈论, 纳什均衡

Abstract: According to the properties of selfish nodes, this paper proposes a game model of node cooperation, analyzes and compares Nash equilibrium of achieving node cooperation for single-stage game and repeated game that adopts Tit-For-Tat(TFT), Grim Strategy(GS) and One-step Trigger(OT). The results show that the Nash equilibrium of selfish node in single-stage game is similar to Prisoner’s Dilemma, and threshold value in repeated game using Tit-For-Tat is minimum, which is easier to achieve cooperation than other strategies.

Key words: wireless Ad Hoc network, node cooperation, game theory, Nash equilibrium

中图分类号: 

• TP393.08