## 2 Related Works  
At present, some standardization organizations and universities have carried out research on 5G and satellite converged network architecture. In [11], [PERSON] et al. studied the feasibility of seamless and efficient integration of ground communication systems with satellite networks. The third Generation Partnership Project (3 GPP) standardization document puts forward four preliminary network architecture models for satellite-ground convergence [12], and it discusses the adaptive modifications that need to be made to deploy 5G New Radio (NR) in non-ground networks. [PERSON] et al. presented a multi-access edge computing 5G and satellite converged network architecture supporting enhanced mobile broadband, and they leveraged the proposed architecture to guarantee the quality of experience for streaming media users in [13]. [PERSON] et al. introduced an SDN-based ground-satellite network architecture and estimated the average transmission delay and control delay in [14]. [PERSON] et al. focused on the joint beamforming design and optimization of the reconfigurable intelligent surface (RIS) assisted hybrid satellite-terrestrial relay networks to minimize the total transmit power of the satellite and base station while ensuring the user rate requirements in [15]. [PERSON] et al. formulated a constrained optimization problem to maximize the instantaneous rate of the terrestrial user while satisfying the interference probability constraint of the satellite user in [16], and they studied the secrecy performance of the cognitive satellite terrestrial network. Although there have been some research achievements on the 5G and satellite communication convergence at home and abroad, there are few researches on the business and application scenarios of power transmission and distribution scenarios. Moreover, the network architecture of the above literature only includes terrestrial infrastructure and satellites, ignoring the advantages of UAVs. Different from the above work, we also take advantage of the high mobility of UAVs [17; 18] and use a UAV as a relay device for ground and satellite communication, which can further improve the quality of data transmission. In heterogeneous networks, device association is an important issue to improve system performance, and the goal of the device association issue is to determine the communication mode of every ground device in heterogeneous networks [19; 20]. [PERSON] et al. proposed a user association scheme based on the public security user priority to solve the problem of user association in a multi-layer heterogeneous network, and they realized load balancing and interference management in a long-term evolution system of high volatility public security in [21]. [PERSON] et al. studied the strategy of base station dormancy and user association under the constraint of guaranteeing the minimum rate of users in [22]. The proposal of this scheme can effectively shut down the base station in the standby state, thereby achieving the purpose of saving the energy consumption of the entire heterogeneous network. In addition, from the perspective of energy saving, power control technology plays an important role in reducing device energy consumption [23; 24]. [PERSON] et al. proposed an energy-efficient power allocation and wireless backhaul bandwidth allocation method under the constraints of specific quality of service (QoS) to maximize the system energy efficiency of downlink heterogeneous networks in [25]. [PERSON] et al. studied a gradient-based iterative algorithm to find the optimal solution for energy-saving power allocation, thereby maximizing the energy efficiency of the system in [26]. [PERSON] et al. studied the weighted sum of energy efficiency in heterogeneous networks considering power and rate constraints in [27].