一种新的无线传感器节点的连续参数功耗模型  

A Novel Power Model with Continuous Parameters for Wireless Sensor Nodes

作　　者：刘伟[1] 罗嵘[1] 杨华中[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《电子与信息学报》2010年第8期1968-1973,共6页Journal of Electronics & Information Technology

基　　金：国家863计划项目(2006AA01Z224)资助课题

摘　　要：为了估计传感器节点的能量开销,需要对节点功耗进行合理、准确的建模。然而,现有的节点功耗模型都没有很好地满足准确性这一要求。该文提出了一种新的基于连续参数功耗状态机的节点功耗模型,可用于任意类型传感器节点的功耗建模。该模型能够根据电源电压和工作频率等参数的变化对节点功耗进行更为准确的预测。通过对传感器节点中常用的ATmega128(L)微处理器进行实际建模并与独立的实测结果进行比较,可以发现该模型对活动状态功耗的预测误差小于1%,对空闲状态功耗的预测误差小于9.7%。该模型可用于替换传感器网络仿真工具的现有模型,为传感器节点的能量开销提供更为准确的预测结果。In order to estimate energy overhead of sensor nodes,it is necessary to model their power consumption reasonably and accurately.However,existing power models are not accurate enough.This paper proposes a novel power model based on power state machines with continuous parameters,which can be used for any type of sensor nodes.This model is able to predict power consumption of sensor nodes according to changes of supply voltage and operating frequency.By handling ATmega128 （L） microprocessor frequently used in typical sensor nodes with this model and comparing with independent measurement results,it is shown that prediction error of this model is less than 1% for active state and 9.7% for idle state.This model can be used to substitute existing models of sensor network simulators to provide more accurate prediction results of energy overhead for sensor nodes.

关 键 词：无线传感器网络 无线传感器节点 功耗模型 功耗状态机 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]