基于运动预测的水下传感器网络MAC协议_金志刚.pdf

35 3 Vol.35 No.3 2013 3 Journal of Electronics Information Technology Mar. 2013 MAC ( 300072) (UWSN)UWSN UWSN (MAC) AR MAC AR(5) 74.8% MAC P-MACNS-2 (PRR)10%15% (UWSN)(MAC) TP393 A 1009-5896(2013)03-0728-07 DOI: 10.3724/SP.J.1146.2012.00970 Motion Prediction Based MAC for Underwater Wireless Sensor Networks Jin Zhi-gang Su Yi-shan Liu Zi-xin Dou Fei (School of Electronic and Information Engineering, Tianjin University, Tianjin 300072, China) 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 1  UWSN MAC (UWSN) MAC [4,5]TDMA, FDMA, [1-3] UWSN CDMA (MAC)