With the increasing applications of the mobile P2P networks, how to improve the resource search performance has been an important research focus. Peers’ features of strong mobility, short wireless transmission range and malicious behavior make the efficient and effective resource search more difficult in mobile P2P networks. This paper proposes an informed resource search strategy, iForest, in mobile P2P networks. To tackle the issue of peer’s mobility, we present a quantifying method of a neighbor peer’s stability; to deal with the problem of a peer’s malicious behavior, we employ the idea of peer’s credibility; to improve the resource search efficiency, we use the concept of peer’s resource accessibility. These guidance factors are derived and calculated based on the findings that each peer’s movements often repeat on a day-to-day basis and each peer has its own interests in mobile P2P networks. The simulation results showed that the iForest strategy could both improve the resource search success rate and reduce the communication complexity.

随着移动P2P网络的日益普及，如何提高资源搜索性能已成为重要的研究重点。对等方具有强大的移动性，较短的无线传输范围以及恶意行为，这使得在移动P2P网络中进行高效有效的资源搜索变得更加困难。本文提出了一种明智的资源搜索策略，iForest在移动P2P网络中。为了解决对等体的移动性问题，我们提出了一种量化对等体对等体稳定性的方法。为了解决同伴恶意行为的问题，我们采用了同伴信誉的思想。为了提高资源搜索效率，我们使用对等体资源可访问性的概念。这些指导因素是基于以下发现得出和计算的：每个对等方的动作通常会每天重复进行，并且每个对等方在移动P2P网络中都有自己的兴趣。仿真结果表明，iForest策略既可以提高资源搜索成功率，又可以降低通信复杂度。