无线传感器网络实时任务内电压调度算法研究

针对无线传感器网络（wireless sensor networks, WSNs）多节点协同式并行处理应用节能设计环节, 提出了一种低功耗实时动态电压调节（dynamic voltage scaling, DVS）算法.该算法利用所建立的节点单任务处理模型来反映相关通信事件对任务处理的影响,引入任务内的电压优化调度策略,可获得模型中基本块理想的处理频率（或电压）.最后,通过创建频率拆分法有效地消除了任务完成期与截止期之间的空闲时隙.给出了该算法的实现方法,通过仿真研究证明该算法能有效地降低节点能耗.

Real-time Intra-Task Voltage Scheduling Algorithm for Wireless Sensor Networks

In this paper, a low power real-time DVS algorithm is proposed for the energy-efficient designs in the applications for WSNs which require collaborative processing executed in parallel on sensor nodes. The created single task processing model is used to reflect the interferences of associated communication events on the processing of the tasks, and an optimal intra-task voltage scheduling strategy is introduced to obtain the ideal operational frequency (or voltage) of each basic block in the model. The slack time between the task finish time and deadline is then effectively eliminated by creating frequency split method. The implementing method of the algorithm is presented and the effectiveness on reducing nodes energy consumptions is validated through the simulation studies.