容迟网络中基于节点能量考虑的混合散发与等待路由算法

容迟网络DTN是一个新兴的研究领域,这种网络中节点之间的连接时常发生中断并且难以预测,目前一个常用的解决办法是使用多拷贝路由。但是,考虑到网络中多数节点能量供应受限的特点,大量额外的消息拷贝传输会使网络中部分节点能量迅速消耗,直至节点停止工作,导致整个网络的路由性能快速下降。针对容迟网络中的散发等待路由算法[1],利用网络中不同节点在能量供应方面不同的特点,本文提出了混合散发等待路由算法。仿真结果表明,与二分法散发与等待路由算法相比,这种路由算法通过不同程度地利用各节点上的能量供应,在递交成功率、平均延迟方面能够取得较大改善。

A Hybrid Spray and Wait Routing Scheme in Delay Tolerent Based on Energy Considerations

Delay Tolerant Networks is an emerging research field.In this kind of networks,the connections between nodes are frequently interrupted,and it is difficult to predict them.At present,a common strategy is to use multiple-copy routing for message delivery.However,considering the characteristic that the majority of nodes' energy supplies are limited,a large number of additional copies transmission will make some nodes' energy consumption larger,making the nodes stop working faster,eventually leading to the rapid decline of the routing performances.With different energy supplies on each node in the networks,a hybrid spray and wait routing algorithm,which is ameliorated by the spray and wait routing algorithm,is put forward in this paper.The simulation indicates that this routing algorithm has better performances on the delivery probability and the average delay by increasing the cost of energy consumption differently at every node.