关键词: 水声传感器网络, 协作中继, 有限马尔可夫链, 中转节点, 状态评价函数

Abstract: In order to address the high error rate and low energy efficiency on underwater sensor network, a collaborative relaying algorithm on underwater acoustic sensor networks is proposed based on the analysis of Markov chain state space. Firstly, the algorithm obtains the error rate and the energy state of the cooperative node by Markov chain state space. Then based on the energy policy to determine the transit node, so that the network gives priority to the data transmission which has been collected to enhance the transmission efficiency. Finally, the cooperative node state evaluation function based on the optimal relay selection is proposed, which makes the network select the cooperative node with the highest evaluation result as the forwarding node, and reduces the bit error rate and energy loss in the data transmission process. Experimental results show that, the algorithm compared with the underwater network adaptive protocol and underwater acoustic network protocol based on enhanced energy balance data transmission, the average packet delivery success rate is improved by 2.3% and 3.1% respectively, and the network energy efficiency is increased by 10.6% and 5.8% respectively, which has good results in improving the efficiency of data transmission and reducing network energy consumption.

Key words: underwater acoustic sensor network, cooperative relay, finite Markov chain, transit node, state evaluation function