短相遇接触时间网络环境中的时延容忍网络路由方案

Routing Scheme for Delay Tolerant Network in Short Contact Duration Time Network Environment

为解决时延容忍网络在短接触时间下的路由问题,给出了一种短相遇接触时间网络环境中的时延容忍网络路由方案.该方案首先利用相遇接触时间、相遇间隔时间和消息时效等网络信息计算一跳传递概率和两跳传递概率,然后根据所得传递概率在当前接触节点和过去接触节点中选择转发节点,从而建立低成本路由.仿真性能分析结果表明:与其它经典的时延容忍网络路由方案相比,所给路由方案可以在降低路由成本的情况下,提高消息传递率,且能缩短平均时延.

In order to solve the routing problem of delay tolerant networks in short contact time a routing scheme for delay tolerant network in short contact duration time network environment is proposed.The proposed scheme firstly calculates the one-hop delivery probability and two-hop delivery probability by using the network information such as the contact duration time,the inter-contact time and the message time-to-live,and then the relay nodes is selected from the current contact nodes and the past contact nodes according to the obtained delivery probability.The simulation results show that the proposed scheme can improve the the message delivery rate and shorten the average delay while reducing the routing cost by comparing with other classical routing scheme of delay tolerant networks.