Abstract: Traditional Ad Hoc routing mechanism and other pre routings are no longer suitable for wireless mesh networks. In contrast, Opportunistic Routing（OR） based on opportunistic routing has got more and more applications. It takes advantage of candidate set to improve the network throughput and decrease the retransmission. However, the OR also suffers from safe threats. This article aims to solve the cooperative cheating attacks. It proposes a trusted model based on feedback credibility and integrates OR to prevent the cooperative cheating nodes joining the candidate set. It establishes a trusted opportunistic routing forward model based on feedback credibility. Simulation experiments show that it has advantages in combating classic malicious nodes behaviors and especially cooperative cheating attacks comparing with classic ExOR protocol.

Key words: Wireless Mesh Networks（WMNs）, opportunistic routing, feedback credibility, route forwarding strategy, trusted model

摘要： 传统Ad Hoc等先决路由机制不再适合无线Mesh网络。相反，基于后择路由机制的机会路由已经获得越来越多的应用。机会路由中的转发候选集可有效增加无线Mesh网络吞吐量和降低重传数；但是，机会路由也正遭受安全问题困扰。针对节点间的共谋攻击行为，提出一种基于反馈可信度的信任模型，并结合到机会路由中，防止共谋节点加入机会路由转发候选集。建立一种基于反馈可信度的可信机会路由转发模型（简称FCTOR）。仿真实验表明，该模型较经典的ExOR协议可以有效抑制典型恶意节点，尤其面对共谋攻击行为时表现出良好的性能。

关键词: 无线MESH网, 机会路由, 反馈可信度, 路由转发策略, 可信模型