基于消息传输率的时延容忍网络路由

Data transfer rate-based routing for delay-tolerant networks

针对时延容忍网络(DTNs),提出基于消息传输率的路由(DTRR)。将每条消息划分若干个消息块。当源节点遇见合适的转发节点就传输消息块,否则就将消息块存于缓存区中。同时,DTRR路由结合相遇频率、相遇时长和缓存区的可用空间,推导链路的消息传输率。再依据消息传输率,选择下一跳转发节点。仿真结果表明,提出的DTRR路由在消息传输率方面的性能优于同类的等待路由(SWR)。

Data Transfer Rate-based Routing(DTRR)is proposed for Delay-Tolerant Networks(DTNs).Each message is divided into several message blocks.When the source node meets the appropriate forwarding node,it transmits the message block,otherwise it stores the message block in the cache.At the same time,the DTRR combines the contact frequency,the duration of the contact and the available space of the cache area to deduce the message transmission rate of the link.The next hop forwarding node is selected according to the message transmission rate.Simulation results show that the proposed DTRR has better performance in message transmission rate than similar Spray-and-Wait Routing(SWR).