Spectrum Allocation Scheme Based on Stable Matching in Hierarchical Cognitive Satellite Network

Abstract

With the rapid development of satellite communication, the number of users and available bandwidth of satellite services are experiencing a significant growth period. Aiming at the above problems, a spectrum allocation scheme of cognitive satellite networks based on stable matching is proposed to improve spectrum utilization. Firstly, the satellite-ground integrated spectrum resource sharing model is established, and the scenario of cognitive satellite downlink using the idle spectrum of the ground network is analyzed. According to the transmission characteristics of satellite communication, the utility function of cognitive satellite is given, and users can form a stable match between primary users (PUs) and secondary users (SUs) through independent negotiation. This spectrum allocation algorithm has low complexity and can adapt to dynamic networks. Simulation results show that the performance of the proposed algorithm is close to the optimal scheme, and the spectrum utilization rate is significantly improved.