关键词: 移动对等网络, 自私性, 恶意性, 讨价还价, 虚拟货币, 动态博弈, 激励策略

Abstract: Owing to the self-organization and opening features of mobile P2P network and the resource-constraint of nodes in it, some nodes show their selfishness and malice. Aiming at this problem, this paper proposes a novel incentive strategy based on dynamic game of bargaining in mobile P2P network (DGBIS). The incentive strategy adopts virtual currency payment method. The node calculates the evaluation of a message forwarding based on the virtual currency, its resource state and the message property. Both sides of the transaction give the reasonable price according to the evaluation and based on the dynamic game of tri-stages bargaining. Through the game analysis, this paper gives the Nash equilibrium solution of DGBIS strategy, which encourages rational selfish node to cooperate with the message forwarding in order to maximize its own benefits, and holds back the deceptive price of the malicious nodes. Analysis and simulation show that this incentive mechanism is able to effectively improve the success rate of message forwarding, reduce the system’s energy consumption in the whole network system, and reach the predetermined design target.

Key words:  mobile P2P network, selfishness, malice, bargaining, virtual currency, dynamic game, incentive strategy