基于混合任务模型的动态电压调度在无线传感器网络中的应用  

Application of dynamic voltage scaling based on hybrid-task model in wireless sensor network

作　　者：韩文雅[1] 王雷[1] 

机构地区：[1]湖南大学软件学院,长沙410082

出　　处：《计算机应用》2010年第9期2522-2525,共4页journal of Computer Applications

摘　　要：为了最大限度节约能量,延长无线传感器网络(WSN)的使用寿命,针对计算复杂度较高的WSN应用背景及其普遍存在的任务模式,提出一种相对更通用的、基于混合任务模型的动态电压调度算法(H-DVS)。H-DVS算法能在任务相对期限没有限制的情况下,与最早截止时间优先(EDF)调度算法结合,支持周期任务和零散任务同时存在的混合任务模型。H-DVS根据CPU的工作负载,由调频(FM)因子对CPU进行实时电压和频率调节,从而在降低能耗的同时保证任务的实时性要求。理论分析和仿真实验结果表明,该方法可行且有效。In order to prolong the lifetime of Wireless Sensor Network （ WSN） by making economical use of energy, the authors put forward a more common algorithm which was known as the hybrid-task-model-based dynamic voltage scaling （ H- DVS） . Without restrictions of the relative duration, H-DVS algorithm was combined with Earliest Deadline First （ EDF） algorithm and supported the hybrid-task model where the periodic tasks and sporadic tasks existed at the same time. According to the CPU＇s working load, H-DVS algorithm used the Frequency Modulation （ FM） factor to regulate the real-time voltage and the frequency, and thereby it could support the real-time requirements while reducing energy consumption. The theoretical analysis and simulation results show that the method is feasible and effective.

关 键 词：无线传感器网络 能量管理 动态电压调度 混合任务模型 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]