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 Spot Beam Power Optimization for an Energy Efficient Multi-LEO Satellite Network 


Vol. 50,  No. 11, pp. 1687-1699, Nov.  2025
10.7840/kics.2025.50.11.1687


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  Abstract

This paper proposes a spot beam power control method for downlink non-terrestrial networks consisting of multiple low Earth orbit (LEO) satellites. Each designated ground access point (GAP) is continuously served by a steering beam from LEO satellites during their visibility period. We address the global energy efficiency (GEE) maximization task to determine the optimal tradeoff between the sum-rate and total power consumption of LEO satellites. The GEE maximization problem is formulated by taking the inter-beam, inter-carrier, and terrestrial network interference into account. To ease the complexity of the problem, we further simplify the expressions of the GEE and interference and then propose a successive convex approximation (SCA)-based spot beam power optimization method. Numerical results validate its effectiveness over baseline algorithms in different system setups.

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[IEEE Style]

J. Moon and H. Lee, "Spot Beam Power Optimization for an Energy Efficient Multi-LEO Satellite Network," The Journal of Korean Institute of Communications and Information Sciences, vol. 50, no. 11, pp. 1687-1699, 2025. DOI: 10.7840/kics.2025.50.11.1687.

[ACM Style]

Jihwan Moon and Hoon Lee. 2025. Spot Beam Power Optimization for an Energy Efficient Multi-LEO Satellite Network. The Journal of Korean Institute of Communications and Information Sciences, 50, 11, (2025), 1687-1699. DOI: 10.7840/kics.2025.50.11.1687.

[KICS Style]

Jihwan Moon and Hoon Lee, "Spot Beam Power Optimization for an Energy Efficient Multi-LEO Satellite Network," The Journal of Korean Institute of Communications and Information Sciences, vol. 50, no. 11, pp. 1687-1699, 11. 2025. (https://doi.org/10.7840/kics.2025.50.11.1687)
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pISSN : 1226 - 4717
eISSN : 2287 - 3880