无线传感器网络中基于效用模型的分布式功率控制机制  

A Utility Model-Based Distributed Power Control Scheme in Wireless Sensor Networks

作　　者：刘韬[1] 

机构地区：[1]西南民族大学计算机科学与技术学院,四川成都610041

出　　处：《电子学报》2016年第2期301-307,共7页Acta Electronica Sinica

基　　金：中国博士后基金(No.2013M542289);四川省科技厅科技支撑项目(No.2014SZ0104);西南民族大学中央高校基本科研业务费专项(No.13NZYTD02)

摘　　要：本文将效用模型引入无线传感器网络的功率控制设计中,提出了一种基于效用模型的分布式功率控制机制(简称UMDPC).该机制建立了网络中所有传感器节点的功率与效用模型的对应关系,将链路可靠性、网络能耗归纳到统一的网络效用优化框架中,并证明该效用优化问题是凸优化问题,构造基于对偶分解的分布式的优化算法,获得网络效用最大化条件下各节点的优化发射功率.最后,通过模拟实验对所提机制及其实现算法的性能进行比较和评价.实验结果表明,本文所提机制最大化了网络的效用,提高了网络的能量利用效率.In this paper,the utility model is introduced into power control of wireless sensor network and a utility model-based distributed power control scheme（ abbreviated UMDPC） is presented. This scheme establishes the correspondence between the transmission power of sensor nodes and utility model,and optimizes the link reliability and energy consumption with a unified network utility optimization（ NUM） framework. Then this NUMproblem is proved to be a convex optimization problem. A distributed optimization algorithm is proposed to calculate the optimal transmission power of each node by using dual decomposition techniques. Finally,experiments are performed to evaluate the performance of the proposed scheme. Simulation results showthat UMDPC scheme can maximize network utility and improve energy utilization efficiency.

关 键 词：无线传感器网络 效用 功率控制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]