能量捕获无线传感器网络中速率自适应路由算法

能量捕获无线传感器网络是无源感知技术中非常重要的一类,它能够有效解决节点能量受限的问题,保持网络运行的持续性.现有的路由方法并未充分利用节点的能量捕获特性,也没有考虑到链路的成功收包率和节点的传输速率.为进一步提高网络的性能,提出了一种结合链路成功收包率的速率自适应路由算法.通过对节点的剩余能量和链路的成功收包率进行建模,给出了一个节点可作为路由中继节点所需要满足的两个条件;基于优化方程,为传输路径上的每一跳节点自适应配置时延最小化的传输速率;提出路由发现步骤来找出端到端传输时延最小的传输路径.实验结果表明,相比于固定传输速率的路由算法,所提算法所得到的传输路径具有较低的端到端传输时延和较高的吞吐率.

Data Rate Adaptive Routing Algorithm in Energy Harvesting Wireless Sensor Networks

Energy harvesting wireless sensor networks are an very important kind of passive sensing technology,which can effectively solve the problem of limited energy of nodes,and maintain continuous operation.Existing routing algorithm does not take advantage of the energy harvesting characteristics of nodes,and does not take the packet delivery ratio and the data rate into account.For improving the performance of the network,we proposed a data rate adaptive routing algorithm combining the packet delivery ratio of wireless link.Two constraints that a relay node on packet delivery route must be required to meet,were given by modeling the residual energy of nodes and the packet delivery ratio of wireless link.Through optimization equation,the data rate which can minimize the packet delivery delay over each hop on route was adaptive configured,and the route discovery procedure was proposed to find the packet delivery path to reduce the end to end delay.Experimental results show that the proposed algorithm can obtain the lower packet delivery delay and the higher throughput than fixed rate routing algorithm in energy harvesting wireless sensor networks.