基于功率控制的无线体域网能量有效传输算法  

Energy Efficient Transmission Strategy Based Power Control in WBAN

作　　者：杨静[1] 甘露 YANG Jing;CAN Lu(School of Telecommunication and Information, Chongqing University of Posts and Telecommunication, Chongqing 400065, China;Optical Communication and Network Key Laboratory of Chongqing , Chongqing 400065, China)

机构地区：[1]重庆邮电大学通信学院,重庆400065 [2]重庆邮电大学光通信与网络重点实验室,重庆400065

出　　处：《传感技术学报》2018年第2期247-252,共6页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(61371097);重庆高校创新团队建设计划项目(CXTDX201601020)

摘　　要：在资源受限的体域网中,人体移动特性使得体域网不适合采用固定功率发送数据。为此,提出一种适用于体域网的能量有效传输算法。该算法中的传感器节点利用周期信标帧的广播特性,对当前路径损耗进行估计,并通过回复帧动态调整路径损耗权重因子,减少估计误差值。最后在保障误包率的前提下,传感器节点根据信道状态调整发送功率。仿真结果表明,所提算法不仅能够减少发送能量的浪费,而且可以减少包平均发送次数,从而提高节点的能量效率。Because of the characteristics of body movement,the resource-constrained Wireless Body Area Network（WBAN）was not suitable for adopting constant power to send data.Therefore,an energy efficient transmission algorithm for WBAN was proposed.The sensor nodes utilized the broadcast characteristics of the periodic beacon frame to obtain the path loss estimate.And then they dynamically adjusted the path loss weighting through the feedback frame,so as to reduce the estimated error value.Finally,in the condition of ensuring the packet error rate,the sensor nodes adaptively adjusted the transmission power according to the channel status.Simulation results show that the proposed algorithm can not only reduce the waste of transmitted energy,but also reduce the average number of packets sent,which improves the energy efficiency of nodes.

关 键 词：体域网 功率控制 能量有效 信标帧 路径损耗 

分 类 号：TN929.5[电子电信—通信与信息系统]