An efficient transmission scheme for underwater sensor networks

One of the fundamental differences between the terrestrial radio frequency (RF) signal and underwater acoustic signal is long propagation delay. This paper is contented with a MAC protocol for underwater sensor networks (USN) in which there are n sensor nodes in a transmission range W . Long propagation delay of the acoustic signal causes a serious problem for MAC protocol. If every sensor node has packet to transmit, there are n packets to be transmitted to the sink node. In this paper, we propose an efficient packet transmission scheduling algorithm for underwater acoustic communications with arbitrary values of n and W , using the property of long propagation delay.