一种基于声誉的DTN节点合作机制

DTN自私节点由于资源有限,会拒绝转发其他节点的消息,严重影响路由性能,因此针对DTN节点的自私性,设计能够促使节点进行合作转发的节点合作机制具有重要意义。首先采用确认机制监测节点的转发行为,然后基于直接声誉值和间接声誉值计算节点的声誉值,最后提出一种基于声誉的节点合作机制。实验结果表明该机制能够促使自私节点合作转发消息,提高消息传递率,并减小消息传递时延。

A Node Cooperation Mechanism Based on Reputation for Delay Tolerant Networks

Due to the limited resources, the selfish nodes of delay tolerant networks will refuse to forward messages for other nodes, which will seriously affect the routing performance. So for the node selfishness, it is very important to design a node cooperation mechanism that can prompt the nodes to cooperatively forward messages. First, a node monitors other nodes' forwarding behavior by the acknowledgement mechanism. Then the reputation value is calculated, based on the direct reputation value and the indirect reputation value. Finally a node cooperation mechanism based on reputation is proposed. The experimental results show that the mechanism can stimulate the nodes to cooperatively forward messages, improve the message delivery ratio and reduce the message delivery delay.