时钟同步调度的多跳机械振动WSN多信道传输法  

Multi-channel Transmission Method for Mechanical Vibration Wireless Sensor Networks Based on Time Synchronized Scheduling

作　　者：汤宝平[1] 周沿江 肖鑫[1] 邓蕾[1] TANG Baoping;ZHOU Yanjiang;XIAO Xin;DENG Lei(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

出　　处：《振动．测试与诊断》2019年第6期1183-1188,1357,共7页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(51675067,51775065)

摘　　要：针对机械振动无线传感器网络(wireless sensor networks,简称WSNs)在多跳应用中因信道竞争激烈导致大量振动数据传输速率低的问题,提出了一种基于时钟同步调度的多跳机械振动WSN多信道数据传输方法,从时钟同步精度、网络调度效率和信道干扰等方面提高多跳网络数据传输性能。首先,采用基于信标时序补偿的多跳网络时钟同步方法,实现数据传输的全网同步调度;其次,通过父子链路时序轮转的数据传输调度方法,确保节点有效传输时间最大化;然后,采用干扰最小化信道分配方法实现多跳网络传输信道分配,避免邻频干扰对多信道并行数据传输的影响;最后,通过丢包检测重传机制保证数据传输可靠性,避免振动数据丢失。多信道数据传输性能测试结果表明,该方法可以将多跳网络数据传输速率从10kbps提高至70kbps以上,满足多跳机械振动WSN数据传输需求。Aiming at the problems that machine vibration wireless sensor networks has a low network transmission rate in multi-hop application due to the intense channel competition,a multi-channel data transmission method based on time synchronized scheduling is proposed to improve the multi-hop transmission performance for clock synchronization accuracy,network scheduling efficiency and channel interference.The clock synchronization method for multi-hop network based on beacon timing compensation is used to realize the whole network synchronous scheduling of data transmission.The data transmission scheduling method of father-son link timing rotation is utilized to maximize the effective transmission time.Furthermore,the interference minimization channel allocation method is adopted to realize the transmission channel allocation in multi-hop networks and to avoid the influence to the parallel data transmission from adjacent frequency interference.In addition,the packet loss detection retransmission mechanism is used to guarantee the reliability of data transmission and avoid vibration data packet dropout.Multi-channel data transmission performance test results show that the method can improve the data transmission rate of multi-hop network from 10 kbps to 70 kbps,and meet the data transmission requirements of multi-hop mechanical vibration wireless sensor networks.

关 键 词：机械振动 无线传感器网络 时钟同步 多信道 数据传输 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TH17[自动化与计算机技术—计算机科学与技术]