无线传感器网络中能量均衡延迟敏感的节点调度方案

An Energy-Balance and Delay-Sensitive Scheme for Wireless Sensor Networks

在无线传感器网络中,为了节省能量,许多方案使用让节点工作一段时间就休眠一段时间的工作周期(duty-cycle)的模式,但节点的休眠会引发很大的网络延迟。所以既要使用工作周期的模式来节能又能让网络获得较小的延迟,一直是人们研究的热点及难点问题。为了既能获得较小的网络延迟又能增大网络的生命周期,论文提出了一种能量均衡延迟敏感(Energy-Balance and Delay-Sensitive,EBDS)的节点调度算法,在选择下一跳的时候,通过在规定的时间阈值内,选择醒着的最短路径上的节点来减小网络延迟,或是选择剩余能量最大的节点实现能量均衡来增大网络生命周期作为下一跳,这样可以把网络延迟控制在一定的范围内的同时增大网络的生命周期。理论分析及实验结果表明,与现有的研究相比,EBDS能够较好的把延迟控制在可接受范围内的同时有效地增大网络的生命周期。

In wireless sensor networks, a lot of work saves energy by employing duty-cycle. When a sensor node switches into sleep mode , it could not send and receive messeges immediately, which may bring about large delay. That is a hot and difficult problem. The algorithm Energy-Balance and Delay-Sensitive（EBDS） is introduced here is to study of a node how to choose the next hop with high efficiency and energy saving. Within a defined threshold time value, the node is chosen belong to the shortest path, or a node has the most enenrgy. Calculations and simulation results show that comparing with previous algorithms, EBI）C can possible abtain highter lifetime compensated by some delay can be tolarated.