关键词: 水声传感器网络, 时分多址, 媒体访问控制协议

Abstract: Signal transmission conditions are very poor for ocean channel. It is a great challenge for Media Access Control (MAC) protocol to work reliably and effectively in Underwater Acoustic Sensor Networks (UASN). Due to the long and changeful propagation delay, a new MAC with modified TDMA named W-MAC was proposed, which could adapt underwater environment through simplified synchronization process, the defer time to allocate transmitting of all nodes as well as the detection time with sleep scheme to prevent from data collision to decrease the overhead of energy. The simulation results show W-MAC is quite efficient when data traffic is high in underwater acoustic sensor network.

Key words: Underwater Acoustic Sensor Network (UASN), Time Division Multiple Access (TDMA), Media Access Control (MAC) protocol