基于波束成形天线的分簇时间同步算法  

Clustered-based time synchronization algorithm using beamforming antennas

作　　者：詹浩[1] 丁良辉[1] 杨锋[1] 钱良[1] ZHAN Hao;DING Liang-hui;YANG Feng;QIAN Liang(Department of Electronic Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]上海交通大学电子工程系,上海200240

出　　处：《信息技术》2016年第12期1-5,共5页Information Technology

基　　金：自然科学基金项目(61301117;61221001;61420106008)

摘　　要：波束成形天线相比较定向天线具有波束集中,抗干扰能力强等特点,配备波束成形天线的节点间通信复杂,造成网络同步困难。文中提出一种分簇网络时间算法解决基于波束成形天线网络同步问题,算法分为选举,分簇,同步三个阶段,选举阶段选举网络根节点,分簇阶段工作于定向天线且网络时间异步场景下,利用网络根节点作为分簇的初始节点完成网络分簇,同步阶段利用簇间同步与簇内迭代完成全网节点同步。仿真分析了算法的开销并能够促使网络时间收敛。Comparing with omnidirectional antennas, beamlorming antennas own beam focusing and strong anti-jamming capability. However,the node using beamlorming antennas have difficulties in time synchronization. The paper proposes a cluster-based time synchronization protocol to address the synchronization in wireless networks using beamforming antennas. The algorithm can be divided into three phases: election,clustering and synchronization. In election stage,nodes elect the node owing the mostneighbors as the root. In the clustering stage, the protocol, working on directional and asynchronousscene, take the root as the first node to divide the network into clusters. A n d in synchronization stage,the network utilizes the clusters to synchronize. The cost in the algorithm is analyzed in the simulation and the protocol can promote the convergence of the network time.

关 键 词：波束成形 时间同步 网络分簇 

分 类 号：TN927.4[电子电信—通信与信息系统]