计算机应用 ›› 2014, Vol. 34 ›› Issue (7): 1947-1950.DOI: 10.11772/j.issn.1001-9081.2014.07.1947

• 网络与通信 • 上一篇    下一篇

基于可变长时隙机制的水下传感器网络MAC协议

田志辉1,金志刚1,王颖1,2   

  1. 1. 天津大学 电子信息工程学院,天津 300072
    2. 61660部队,北京 100089
  • 收稿日期:2014-01-14 修回日期:2014-02-28 出版日期:2014-07-01 发布日期:2014-08-01
  • 通讯作者: 金志刚
  • 作者简介:田志辉(1990-),男,湖南永州人,硕士研究生,主要研究方向:无线传感器网络;金志刚(1972-),男,上海人,教授、博士生导师,主要研究方向:无线网络、网络安全;王颖(1977-),女,河北张家口人,博士,主要研究方向:网络安全。
  • 基金资助:

    国家自然科学基金资助项目;青海省科技计划项目;海南省应用技术研究与开发专项

Variable-length slot based MAC for underwater wireless sensor networks

TIAN Zhihui1,JIN Zhigang2,WANG Ying1,3   

  1. 1. School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China;
    2. School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China
    3. Unit 61660, Beijing 100089, China
  • Received:2014-01-14 Revised:2014-02-28 Online:2014-07-01 Published:2014-08-01
  • Contact: JIN Zhigang

摘要:

通过研究水声通信的特点,分析水下物体的运动特性,提出了一种基于可变长时隙机制的水下传感器网络MAC协议。新协议中,传感器节点会周期性获取邻居节点的位置信息,并根据节点间相互距离的变化自适应地调整信道预约时隙长度,当节点由于运动引起网络区域收缩,节点之间距离变小时,预约时隙长度变小,反之,时隙长度增大。可变长时隙机制,提高了信道时隙资源的利用率。仿真结果表明,动态环境下新协议相对现有的协议在有效网络吞吐量性能上提升15%左右。

Abstract:

A motion model of underwater sensor node was analyzed, and a new Medium Access Control (MAC) protocol of underwater mobile sensor networks based on variable-length slots: VS FAMA was proposed. In VS FAMA, the length of time-slot would be adaptive adjusted according to sensor location that measured periodically, which was positively correlated to the distance between nodes. New protocol made better use of the time-slot resource in underwater sensor networks. NS-2 simulation results show that VS FAMA can get about 15% higher network goodput under the circumstance of motion.

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