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Joint user scheduling and resource allocation scheme for low earth orbit satellite systems considering queue stability
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DOI：10.1016/j.jfranklin.2026.108527.png)
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Abstract
En 中文
In this paper, we investigate the wireless resource allocation in Low Earth Orbit (LEO) satellite communication systems, focusing on users with non-uniform traffic demands. To this end, a joint efficient beamforming (BF) and user scheduling policy capable of accommodating stochastic traffic data arrival is proposed specifically tailored for LEO satellite systems. Under the setup of a uniform planar array at the satellite, we formulate an optimization problem aimed at maximizing the ergodic sum rate under constraints on queue stability, quality of service requirements, and maximum transmission power, which yet involves a long-term decision-making process and thus is decomposed into a series of single-slot drift-plus-penalty upper bound minimization with the help of Lyapunov optimization. Specifically, for each single-slot minimization, an improved user grouping and scheduling algorithm integrating user location information and traffic arrival rates is proposed, based on which, a BF and power control approach combining fractional programming and Lagrange multiplier method is designated for the scheduled users. Simulation results demonstrate that the proposed scheme significantly outperforms existing methods by reducing user queue lengths and enhancing the service rates.
Keywords:
resource allocation
user scheduling
LEO satellite systems
queue stability
beamforming
Journal
J
IF:
4.2
Papers:
812
Citations:
0
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