基于运动预测的水下传感器网络MAC协议

doi:10.3724/SP.J.1146.2012.00970

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摘要在海洋环境的影响下，水下无线传感器网络(UWSN)节点始终处于运动状态；UWSN采用声信号通信，缓慢的节点移动也会造成UWSN现有的多址接入技术(MAC)协议冲突避免机制失效。该文建立了水下节点的运动模型，基于AR运动预测模型减小水下节点的时空不确定性对于MAC协议的影响，提高发送信息在预约时隙到达的概率。仿真结果表明，采用AR(5)预测可以减小74.8%的时延探测误差。提出了基于预测的预约MAC协议：P-MAC。NS-2仿真结果表明该协议在海浪运动场景下能提高收包成功率(PRR)10%-15%。

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	金志刚
	苏毅珊
	刘自鑫
	窦飞

关键词 ：水下无线传感器网络(UWSN), 多址接入技术(MAC)协议, 运动预测, 环境适应

Abstract：Due to marine dynamics, sensor nodes of Underwater Wireless Sensor Networks (UWSN) are always in a state of constant motion. Together with low propagation speed of acoustic signal, nodes mobility brings challenge to UWSN MAC. A motion model of underwater node is established to solve the multiple access problems for underwater mobile networks. Based on AR mobility prediction algorithm, the negative effect of space-time uncertainty can be reduced and the probability that sending information arrives in the reservation slot can be improved. The simulation results show that AR(5) algorithm can decrease 74.8% of delay detection error. A new contention-based MAC protocol: P-MAC is proposed. NS-2 simulation results show that P-MAC can get a 10% -15% higher Packet Receptipn Rate (PRR) under the circumstance of wave motion.

Key words： Underwater Wireless Sensor Network (UWSN) MAC protocol Mobility prediction algorithm Circumstances accommodation

收稿日期: 2012-07-25

PACS:

TP393

基金资助:

国家自然科学基金(61162003)和青海省科技计划项目(2012-ZR -2989)资助课题

通讯作者: 窦飞 E-mail: doufei1990@126.com

引用本文:

金志刚, 苏毅珊, 刘自鑫, 窦飞. 基于运动预测的水下传感器网络MAC协议[J]. 电子与信息学报, 2013, 35(3): 728-734. Jin Zhi-Gang, Su Yi-Shan, Liu Zi-Xin, Dou Fei. Motion Prediction Based MAC for Underwater Wireless Sensor Networks. , 2013, 35(3): 728-734.

链接本文:

http://jeit.ie.ac.cn/CN/10.3724/SP.J.1146.2012.00970 或 http://jeit.ie.ac.cn/CN/Y2013/V35/I3/728