摘要
针对异常丢包导致DTN(Delay Tolerant Networks)消息传递成功率降低、时延和开销比增大的问题,提出一种基于可信度的改进DTN安全路由算法。该算法通过收集节点的历史相遇记录,计算并依据节点可信度,在路由转发决策阶段优化转发节点的选择,从而提高消息传递成功率,减少网络资源的浪费,增强DTN抵御异常丢包的能力。仿真实验结果表明改进的算法能够有效抵御异常丢包,综合性能优于典型的DTN路由算法Spray and Wait和Prophet。
In delay tolerant networks （ DTN）, abnormal packet loss can degrade successful rate of message delivery, increase the latency and overhead ratio. To solve these problems, we prbposed a creditability-based improved DTN secure routing algorithm. By collecting historical encountering record of nodes, calculating and in accordance with the creditability of nodes, the algorithm optimises the selection of forwarding nodes in the stage of routing forwarding decision-making, so that improves the successful rate of message delivery and reduces the waste in network resources, thus strengthens the ability of DTN in resisting abnormal packet loss. Simulation experimental results show that the improved algorithm can effectively resist abnormal packet loss, its comprehensive performance is superior to the typical DTN routing algorithm such as Spray and Wait and Prophet.
出处
《计算机应用与软件》
CSCD
2015年第7期297-300,共4页
Computer Applications and Software
基金
安徽省自然科学基金项目(1208085QF107)
