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NOMA-enabled multi-beam satellite systems: Joint optimization to overcome offered-requested data mismatches
- Source :
- UPCommons. Portal del coneixement obert de la UPC, Universitat Politècnica de Catalunya (UPC), BASE-Bielefeld Academic Search Engine, IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, r-CTTC: Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), r-CTTC. Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), instname
- Publication Year :
- 2021
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2021.
-
Abstract
- Non-Orthogonal Multiple Access (NOMA) has potentials to improve the performance of multi-beam satellite systems. The performance optimization in satellite-NOMA systems can be different from that in terrestrial-NOMA systems, e.g., considering distinctive channel models, performance metrics, power constraints, and limited flexibility in resource management. In this paper, we adopt a metric, Offered Capacity to requested Traffic Ratio (OCTR), to measure the requested-offered data (or rate) mismatch in multi-beam satellite systems. In the considered system, NOMA is applied to mitigate intra-beam interference while precoding is implemented to reduce inter-beam interference. We jointly optimize power, decoding orders, and terminal-timeslot assignment to improve the max-min fairness of OCTR. The problem is inherently difficult due to the presence of combinatorial and non-convex aspects. We first fix the terminal-timeslot assignment, and develop an optimal fast-convergence algorithmic framework based on Perron-Frobenius theory (PF) for the remaining joint power-allocation and decoding-order optimization problem. Under this framework, we propose a heuristic algorithm for the original problem, which iteratively updates the terminal-timeslot assignment and improves the overall OCTR performance. Numerical results verify that max-min OCTR is a suitable metric to address the mismatch issue, and is able to improve the fairness among terminals. In average, the proposed algorithm improves the max-min OCTR by 40.2% over Orthogonal Multiple Access (OMA).<br />Comment: 11 pages, 5 figures
- Subjects :
- Optimization
FOS: Computer and information sciences
Mathematical optimization
Optimization problem
Satellites
Computer Networks and Communications
Computer science
Decoding
Computer Science - Information Theory
Aerospace Engineering
02 engineering and technology
Interference (wave propagation)
Precoding
offered capacity to requested traffic ratio
0203 mechanical engineering
Satellite broadcasting
Resource management
multi-beam satellite systems
Interferència electromàgnetica
Electrical and Electronic Engineering
Artificial satellites in telecommunication
Computer science [C05] [Engineering, computing & technology]
Flexibility (engineering)
max-min fairness
Resource optimization
Information Theory (cs.IT)
resource optimization
Offered capacity to requested traffic ratio (OCTR)
NOMA
020302 automobile design & engineering
Sciences informatiques [C05] [Ingénierie, informatique & technologie]
Electromagnetic interference
Satèl·lits artificials en telecomunicació
Max-min fairness
Non-orthogonal multiple access
Non-orthogonal multiple access (NOMA)
Multibeam satellite systems
Automotive Engineering
Metric (mathematics)
non -orthogonal multiple access (NOMA)
Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Satèl·lits i ràdioenllaços [Àrees temàtiques de la UPC]
Decoding methods
Subjects
Details
- Language :
- English
- ISSN :
- 00189545
- Database :
- OpenAIRE
- Journal :
- UPCommons. Portal del coneixement obert de la UPC, Universitat Politècnica de Catalunya (UPC), BASE-Bielefeld Academic Search Engine, IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, r-CTTC: Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), r-CTTC. Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), instname
- Accession number :
- edsair.doi.dedup.....8bd7c743f4f034675e17d4692ce73b7a