Dynamic Cooperative Spectrum Sharing in a Multi-Beam LEO-GEO Co-Existing Satellite System

Among the existing satellite types, Low Earth Orbit (LEO) satellites provide short round-trip delays and are becoming increasingly important. Due to its low orbital profile, the LEO satellites can provide high-speed, low-latency and no dead zone network services for ground users. However, as the num...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2022-02, Vol.21 (2), p.1170-1182
Main Authors: Gu, Pengwenlong, Li, Rui, Hua, Cunqing, Tafazolli, Rahim
Format: Article
Language:English
Subjects:
Cognitive radio
Computer Science
cooperative spectrum sharing
Frequencies
Interference
LEO-GEO co-existing satellite system
Low earth orbit satellites
Low earth orbits
Lyapunov drift analysis
Nonrenewable resources
Optimization
Resource management
Satellite broadcasting
Satellites
Transmission efficiency
Wireless communication
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Summary:Among the existing satellite types, Low Earth Orbit (LEO) satellites provide short round-trip delays and are becoming increasingly important. Due to its low orbital profile, the LEO satellites can provide high-speed, low-latency and no dead zone network services for ground users. However, as the number of satellites continues to increase, frequency bands as non-renewable resources will seriously restrict the future development of the Space-Earth integration network. In this paper, a flexible spectrum sharing and cooperative service method is proposed to address the co-linear interference issue caused by LEO satellites while passing through the coverage area of the GEO beam and allows the LEO satellites to provide services for multiple LEO ground users. In our proposed scheme, through continuous power allocation optimization, we ensure that the service of LEO satellites will not reduce the service quality of the GEO beam. At by taking full advantage of the cooperation between LEO satellites, the quality of their service can be significantly improved. Simulation results show that our proposed scheme converges quickly, the transmission efficiency and the stability of the system can all be guaranteed.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2021.3102704