摘要
能量有效性是WSN研究中的关键问题,其评价模型的研究有助于WSN的发展与应用。将WSN视为一个物理做功系统,用做功效率衡量WSN的能量有效性。引入功率聚合函数和有效功权函数屏蔽WSN的应用差异,提出了一种基于做功模型的能量有效性评价框架。针对WSN中节点的能量异构特性,模型使用相对能耗来度量不同节点的操作代价,以平均能量衰减率和能量熵作为异构WSN能耗状态的衡量指标。实验结果表明这些指标能有效地衡量异构WSN的能耗水平,基于做功模型评价WSN的能量有效性能指导应用系统的开发与部署。
Energy efficiency is a key issue in wireless sensor networks. Researches on the energy efficiency evaluation models could promote the development and application of WSN. Wireless sensor network was modeled as a mechanical work system whose work-efficiency was defined as the metric to measure energy efficiency. In addi- tion, model introduced a power aggregation function and utility function to filter out application-specific features. Then, based on these models and metrics, a general framework to evaluate energy efficiency is proposed and rela- tive energy consumption to measure the operational cost of heterogeneous nodes is applied. Furthermore, two met-rics, average energy discharge rate and energy entropy are constructed, to quantitatively measure a system＇ s energy consumption status. The effectiveness of evaluation model and metrics had been validated by the simulation results.
出处
《科学技术与工程》
北大核心
2013年第13期3647-3652,3675,共7页
Science Technology and Engineering
基金
国家重大科技专项(2012ZX03005007)资助
关键词
异构WSN
能量有效性评价
做功模型
能量衰减率
能量熵
heterogeneous WSN energy entropy energy efficiency evaluation do-work model energy discharge rate
