基于混合拓扑的机械无线传感器网络多信道数据传输方法  

A multi-channel data transmission method for mechanical wireless sensor networks based on hybrid topology

作　　者：曾超[1] 汤宝平[1] 邓蕾[1] 肖鑫[1] ZENG Chao;TANG Baoping;DENG Lei;XIAO Xin(State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 400030,China)

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400030

出　　处：《振动与冲击》2018年第4期28-34,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金(51675067;51375514);国家重点基础研究发展计划(973计划)(2015CB057702)

摘　　要：针对机械振动无线传感器网络节点因信道带宽窄导致网络传输速率过低,在大量原始数据传输需求下实时性较差的问题,提出一种基于簇树星型混合拓扑的多信道数据传输方法。对各传感器网络节点进行树间通信干扰最小化信道分配,避免邻频干扰影响树间并行通信,在数据同步采集结束后,各节点以分配信道组建簇树星型混合拓扑网络进行数据传输;采用树间通信握手机制和树间通信优先级抢占机制解决簇树星型混合拓扑带来的树间互盲问题;将各采集节点短地址作为调度信息载入信标进行广播,各采集节点根据调度信息决定进行数据传输或者休眠,实现树内通信能耗最小化时序调度。将提出的多信道数据传输方法与载波侦听多路访问/冲突避免机制进行对比,实验结果表明该方法能有效提高机械振动无线传感器网络数据传输速率。Aiming at the problems of machine vibration wireless sensor networks node with narrow bandwidth,low network transmission rate,and poor real-time capability,especially in mass raw data transmission situation,a multi-channel data transmission method based on tree-star Hybrid Topology(MDTHT_WJ)was proposed.Firstly,to avoid adjacent channel interference affecting parallel communication,channels were allocated for each wireless sensor network node with minimizing inter-tree communication interference.Each node formed a tree-star hybrid topology network with allocated channel for data transmission after synchronous data acquisition.Then,the handshake mechanism and the preemptive priority mechanism were utilized to solve network partitions problem.Finally,the network short address of each data acquisition node was regarded as scheduling information.Routers broadcasted the scheduling information with beacons,and each data acquisition node determined whether transmitting data or sleep according to the scheduling information,realizing time-scheduled inner-tree communication with minimizing power consumption.Comparative experiment with carrier sense multiple access with collision avoidance was carried out.Experiment results indicate that the network transmission rate of machine vibration wireless sensor networks can be improved effectively by this method.

关 键 词：机械振动监测 无线传感器网络 多信道 数据传输 

分 类 号：TP393.1[自动化与计算机技术—计算机应用技术] TH165.3[自动化与计算机技术—计算机科学与技术]