A MAC Protocol of Concurrent Scheduling Based on Spatial-Temporal Uncertainty for Underwater Sensor Networks

Underwater sensor networks (UWSNs) are characterized by large energy consumption, limited power supply, low bit rate, and long propagation delay, as well spatial-temporal uncertainty, which present both challenges opportunities for media access control (MAC) protocol design. The time-division transmissions can effectively avoid collisions since different nodes transmit packets at period of time. Nevertheless, in UWSNs with order to collisions, the time is subject be enough, results poor channel utilization throughput. In view delay between a receiving node multiple sending UWSNs, there no collision node, simultaneously. Therefore, this paper, we propose MAC concurrent scheduling based on uncertainty called CSSTU-MAC (concurrent MAC) UWSNs. utilizes characteristics temporal-spatial achieve transmission avoidance. Simulation show that outperforms existing terms average consumption network