Ad Hoc网络中一种基于救赎机制的信任模型

A Redemption-based Trust Model for Ad Hoc Networks

在Ad Hoc网络中,节点由于自私等恶意原因以及链路错误导致拒绝转发数据,需要采用适当的机制来提高网络的转发性能。提出一种Ad Hoc网络中的信任模型来激励节点间的协作,在此信任模型中,每个节点通过直接监控和其它节点的推荐监控信息共同完成对邻居节点的信任评价,并维护所有邻居节点的信任值,同时在信任值更新和重建中引入信任值衰退和信任救赎机制来体现模型的健壮性。实验表明该信任模型中的信任救赎机制能提高网络可用性,且该模型有效抑制了恶意节点的行为。

In Ad Hoc networks, nodes refuse to forward packets for others due to link error or malicious reasons such as selfish, A mechanism should be adopted to improve the performance of networks. In this paper,a trust model in Ad Hoc networks is proposed to prompt collaboration among nodes. In the trust model every node makes the trust evaluation of its neighbor nodes locally by direct observation and use of recommendation information available. In our approach, every node maintains a trust rating for each neighbor node. Meanwhile, trust fading and redemption are brought about by update and re-establishment of trust to show robustness. Experiments indicate the trust redemption mechanism of the trust model can enhance the usability of networks, and the model can restrain the misbehavior of malicious nodes effectively.