基于IEEE 802.15.6标准无线体域网的跨层重传策略研究  

An Cross-Layer Retransmission Strategy for the Body Shadowing Affect in IEEE 802.15.6-Based WBAN

作　　者：王国栋 郭坤祺[1] WANG Guo-dong;GUO Kun-qi(School of Computer Science and Telecommunication Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学计算机科学与通信工程学院,江苏镇江212013

出　　处：《软件导刊》2018年第9期200-202,207,共4页Software Guide

摘　　要：由于受人体姿势与动作影响,无线体域网传感器节点与Hub节点通信会出现阴影效应,导致收发端数据传输失败率高,数据帧重传成功率低,同时多次数据重传造成额外能量消耗。为了提高数据重传成功率,减少网络节点能量消耗,提出基于IEEE802.15.6标准的跨层重传策略,通过分析失败数据帧在物理层的信号特征,探究传送失败的原因,并设计MAC层重传方案。实验结果表明,与IEEE802.15.6标准相比,基于IEEE802.15.6的无线体域网跨层重传策略帧重传成功率更高,功率消耗更低,不仅可以提高数据帧重传成功率,改善网络失帧率,而且能够延长无线体域网节点使用寿命。Due to the influence of human body posture and movement,the shadowing effect occurs between the sensor nodes and the Hub node in the wireless body area network,resulting in high failure rate of data transmission between the sender and the receiver and low successful probability of frame retransmission;meanwhile,multiple data retransmissions cause extra energy consumption.In order to solve the problems, a cross-layer retransmission strategy based on the IEEE802.15.6 standard is proposed. According to the signal characteristics of failed data frames at the physical layer,the reasons for the transmission failure are analyzed and the allocation of retransmission is designed at MAC.The experimental results show that the cross-layer retransmission strategy has higher success rate of frame retransmission and lower power consumption than the IEEE802.15.6 standard.Therefore,the cross-layer retransmission strategy based on IEEE802.15.6 can not only improve the success rate of data frame retransmission,and loss rate of the network,but also prolong the working time of nodes in the wireless body area network.

关 键 词：无线体域网 阴影效应 IEEE802.15.6 跨层重传策略 MAC 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]