Dynamic Timeslot MAC Protocol for AUV Underwater Communication

It is difficult to achieve satisfactory results in underwater acoustic communication because of the characteristics of large time delay and multi-path. MAC protocol is the key to the quality of underwater communication. Some protocols, such as S-Aloha, solve the problems of collision and hidden nodes, and use RTS/CTS to compete for access. The change of network structure brings new problems because of the movement of AUV. Based on the fact that the time delay is the main factor affecting the slot length, AUV underwater position prediction model is established. The timeslot is changed when the interval distance of AUV changes. The dynamic timeslot MAC protocol is designed. Compared with the fixed time slot MAC protocol, the simulation results show that the dynamic timeslot MAC protocol improves the network throughput.