Resource allocation for emergency communications in distribution network satellite communication system

Frequent extreme disasters have led to frequent large-scale power outages in recent years. To quickly restore power, it is necessary to understand the damage information of the distribution network accurately. However, the public network communication system is easily damaged after disasters, causing the operation center to lose control of the distribution network. In this paper, we considered using satellites to transmit the distribution network data and focus on the resource scheduling problem of the satellite emergency communication system for the distribution network. Specifically, this paper first formulates the satellite beam-pointing problem and the access-channel joint resource allocation problem. Then, this paper proposes the Priority-based Beam-pointing and Access-Channel joint optimization algorithm (PBAC), which uses convex optimization theory to solve the satellite beam pointing problem, and adopts the block coordinate descent method, Lagrangian dual method, and a greedy algorithm to solve the access-channel joint resource allocation problem, thereby obtaining the optimal resource scheduling scheme for the satellite network. Finally, this paper conducts comparative experiments with existing methods to verify the effectiveness of the proposed methods. The results show that the total weighted transmitted data of the proposed algorithm is increased by about 19.29∼26.29% compared with other algorithms.