无线自组网的自适应同步技术研究  

Adaptive synchronization technology of mobile Ad Hoc network

作　　者：宋晓雪 魏路 林水生[1] SONG Xiaoxue;WEI Lu;LIN Shuisheng(School of Communication and Information Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China;Science and Technology on Communication Networks Laboratory,Shijiazhuang 050811,China)

机构地区：[1]电子科技大学通信与信息工程学院,四川成都611731 [2]通信网信息传输与分发技术重点实验室,河北石家庄050811

出　　处：《系统工程与电子技术》2018年第9期2113-2118,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金(61703076);中央高校基本科研业务费专项资金(ZYGX2015J007;ZYGX2016J008;ZYGX2016KYQD125);通信网信息传输与分发技术重点实验室开放课题(KX162600030)资助课题

摘　　要：研究了无线自组网中动态拓扑下节点时间同步存在的问题,提出了一种自适应的时间同步算法。通过采用基于发送-接收模式的同步方法建立节点之间的时延关系表,运用局部加权回归对洪泛时间同步协议中的时间戳进行拟合,再对拟合曲线估计的时间和由节点的动态时延表得到的时间进行综合分析,完成节点时间同步。仿真结果表明,在动态无线自组网中,与传统的同步算法相比,所提算法使得同步过程所需传输的分组数量平均降低了30%左右,全网节点间的时钟同步精度平均提高了26%左右。Considering the problem of time synchronization in dynamic topology under mobile Ad Hoc network,an adaptive time synchronization algorithm is proposed.By using the synchronization method based on the sending and receiving mode,the time delay table between nodes is established,and the time stamp in the flood time synchronization protocol is fitted by local weighted linear regression.Then,the time fitting curve and the dynamic delay table of nodes are analyzed jointly in order to synchronize the time.The simulation results show that the algorithm reduces the average number of packets by about 30%and the clock synchronization precision is increased by about 26% compared with the traditional synchronization algorithm.

关 键 词：无线自组网 自适应时间同步 动态拓扑 局部加权回归 

分 类 号：A813[哲学宗教—马克思主义哲学]