Delayed Acceptance-based User Access Strategy for Low Earth Orbit Satellite Constellations
In response to the user access challenges in low earth orbit(LEO)constellations,a de-layed acceptance-based user access strategy is designed by considering a comprehensive integra-tion of multi-attribute preference order information.Construct the model of the satellite-ground fusion communication system and describe the coverage relationship between users and base sta-tions by connection matrix.Simultaneously,the connection relationship matrix between satellite relay stations and satellites is calculated by considering the positions of satellite relay stations and the LEO constellation configuration.Furthermore,the spectrum resources are divided into chan-nel units.Based on the established model,a user access strategy research method,utilizing combi-natorial optimization,is employed to comprehensively consider channel resource allocation and in-terference management methods.Multiple attributes for preference ordering are proposed,inclu-ding channel gain,interference gain,backhaul capacity,and cell load level between users and cell backhaul links.Theoretical analysis demonstrates the stability and Pareto optimality of the pro-posed matching strategy.The simulation results show that the performance of the proposed UA-DA algorithm is significantly better than other algorithms.
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