计算机工程

• 专栏 • 上一篇    下一篇

基于GPS卫星授时的时分多址MAC协议

王宇,朱益锋,赵增华   

  1. (天津大学计算机科学与技术学院,天津 300072)
  • 收稿日期:2014-12-15 出版日期:2015-12-15 发布日期:2015-12-15
  • 作者简介:王宇(1991-),男,硕士研究生,主研方向:无线网络编码;朱益锋,硕士研究生;赵增华,副教授、博士。
  • 基金项目:
    国家自然科学基金资助项目(61172063)。

Time Division Multiple Access MAC Protocol Based on GPS Satellite Timing

WANG Yu,ZHU Yifeng,ZHAO Zenghua   

  1. (School of Computer Science and Technology,Tianjin University,Tianjin 300072,China)
  • Received:2014-12-15 Online:2015-12-15 Published:2015-12-15

摘要: 针对长距离无线Mesh网络(LDmesh)中节点间的时隙同步,以及传统时分多址(TDMA)网络中信令包丢失导致网络性能下降的问题,提出基于全球定位系统(GPS)卫星授时的TDMA媒体访问控制协议GT-MAC。利用GPS卫星秒脉冲信号对节点进行授时,保证相邻节点以及同一节点不同 接口的时隙同步。WiZiTJU-GPS平台上的实验结果表明,GT-MAC可实现节点时隙发送和接收状态对应,吞吐率比传统2P MAC协议提高了约10.1%。

关键词: 长距离无线Mesh网络, 时分多址, 全球定位系统, 卫星授时, 时隙同步

Abstract: Aiming at the slot synchronization among nodes in Long-distance Wireless Mesh Network(LDmesh),and the performance degradation problem of Maker or Token in traditional TDMA network,this paper proposes a Time Division Multiple Access(TDMA) Media Access Control(MAC) Protocol Based on Global Positioning System(GPS) satellite timing.In order to ensure the slot synchronization between neighbor nodes and the interfaces among the same node,the protocol uses the second pulse signal which is from GPS satellites timing,as a result,achieves synchronization among the nodes and interface slot.At last,correspondence of node sending and receiving state of the GT-MAC is verified by experiments on WiZiTJU-GPS platform,and the results proves around 10.1% increase in throughput compared with traditional 2P MAC protocol.

Key words: Long-distance Wireless Mesh Network(LDmesh), Time Division Multiple Access(TDMA), Global Positioning System(GPS), satellite timing, slot synchronization

中图分类号: