基于似然估计补偿机制的移动无线传感网数据控制同步传输算法  

The Data Control Synchronization Transmission Algorithm for Mobile Wireless Sensor Network Based on Likelihood Estimation Compensation Mechanism

作　　者：江渝川[1] 何国斌[2] JIANG Yuchuan;HE Guobin(Department of Computer Engineering,Chongqmg College of Humanzties Science &Technology,Chongqing,401524,China;School of Computer and Inforrnation Science,Southwest University,Chongqing,400715,China)

机构地区：[1]重庆人文科技学院计算机工程学院,重庆401524 [2]西南大学计算机与信息科学学院,重庆400715

出　　处：《新疆大学学报（自然科学版）》2018年第4期465-472,478,共9页Journal of Xinjiang University(Natural Science Edition)

基　　金：重庆市重点产业共性关键技术创新专项项目(cstc2015zdcy-ztzx40007);重庆人文科技学院科学研究与教研教改项目(CRKXJ201715)

摘　　要：为解决当前移动无线传感网数据控制传输中存在的链路抖动难以控制、同步误差较大以及网络拓扑结构不稳定等问题,提出了一种基于似然估计补偿机制的移动无线传感网数据控制同步传输算法(Data Transmission Synchronization algorithm In Mobile Wireless Sensor Networks based on Likelihood Estimation Compensation Mechanism,DTS-LECM算法).首先,通过移动无线传感网MAC层的标记可移动特性,设计了基于分层区域节点-子节点的数据传输结构,联合广播机制,实现了区域节点的初始化,有效降低了数据控制同步误差,提高区域节点-子节点结构的生存质量;随后,基于数据分组双向交互方式,构建似然估计补偿机制,以实现区域节点控制信息同步,有效促进区域节点之间数据控制同步传输过程中链路的稳定性,且能够对频率偏移、相位偏移的精确计算,显著提高传输过程中的数据稳定性;最后,再次利用数据分组双向交互方式对区域子节点的信息进行精确同步,取得了较好的数据同步效果,且具有数据抖动发生频率低的效果.仿真实验表明,与当前常见的时间同步控制算法(Time Synchronization Control Algorithm,TSC算法)、相位同步控制算法(Phase Synchronization Control Algorithm,PSC算法)和信息片层次分组控制同步算法(Synchronization algorithm for Hierarchical Packet Control of Slices,HPCS-S算法)相比,DTS-LECM算法具有更高的控制精度与更低的分组丢包率,且链路抖动频率分布更加集中.所提算法具有较高的数据传输性能,可运用于公安系统的信号定位,以及抗洪抢险等领域,具有一定的实际应用价值.In order to solve the problems as link jitter control, large synchronization error and unstable network topology structure in current data control transmission methods of mobile wireless sensor networks,a data transmission synchronization algorithm for mobile wireless sensor networks based on likelihood estimation compensation mechanism is proposed in this paper. Firstly, the data transmission structure based on hierarchical region node-sub-node was designed through the label mobility characteristic of MAC layer in mobile wireless sensor networks, and the initialization of regional nodes was realized by combining the broadcasting mechanism to effectively reduce the synchronization error of data control for improving the life quality of regional node-child structure. Subsequently, a likelihood estimation compensation mechanism was constructed based on data grouping bidirectional interaction to implement information controlling of regional nodes and effectively promote the stability of the link in the process of data control synchronous transmission between regional nodes, and the frequency offset and phase offset were accurately calculated to significantly improve the stability of data in the process of transmission. Finally, the information of the sub-nodes is synchronized precisely by using the data grouping bidirectional interaction mode again, which achieves good data synchronization effect and has the low frequency of data jitter. Simulation experiments show that this algorithm has higher control precision and lower packet loss rate, as well as the more centralization of the link jitter frequency distribution compared with the current Time Synchronization Control Algorithm,Phase Synchronization Control Algorithm and Message Slice Hierarchical Packet Control Synchronization Algorithm. The proposed algorithm has high data transmission performance which has certain practical value in signal location of public security system, flood fighting and emergency rescue and other field.

关 键 词：移动无线传感网 似然估计补偿机制 广播机制 频率漂移 数据分组双向交互 精度控制 链路抖动 

分 类 号：TP393.04[自动化与计算机技术—计算机应用技术]