Joint Power Allocation and Relay Design for Low-Latency and Energy-efficiency Ground-Ocean Network

In this paper, we study the low-cost and high-speed information services for users at the sea and low-latency information services for vehicle-to-vehicle(V2V) users near the shore. We formulate the power allocation and relay design problem as a power minimization problem while fulfilling the rate constraints of both vessel users and vehicular users additionally with the low-latency requirement of the vehicular users. Using the Lyapunov optimization theory, the original problem is first transformed to a Lyapunov-drift-plus-penalty minimization problem. Then, an iterative algorithm is proposed to decompose the original problem into two non-convex sub-problems, while the sub-problem 1 can be solved using the feasible point pursuit successive convex approximation(FPP-SCA) algorithm and the sub-problem 2 can be solved by the SCA and the Lagrangian dual method. Finally, simulation results show that our proposed algorithm is beneficial in energy efficiency while guaranteeing the quality-of-service(QoS) requirement of vessel users and vehicular users.