In a multi-beam satellite communication system, traffic requests are typically asymmetric across beams and highly heterogeneous among terminals. In practical operations, it is important to achieve a good match between the offered and requested traffic, i.e., to improve the performance of Offered Capacity to requested Traffic Ratio (OCTR). Due to satellites' payload constraints and limited flexibilities, it is a challenging task for resource optimization. In this paper, we tackle this issue by formulating a max-min resource allocation problem, taking fairness into account such that the lowest OCTR can be maximized. To exploit the potential synergies, we introduce Non-Orthogonal Multiple Access (NOMA) to enable aggressive frequency reuse and mitigate intra-beam interference. Although NOMA has proven its capabilities in improving throughput and fairness in 5G terrestrial networks, for multi-beam satellite systems it is unclear if NOMA can help to enhance the OCTR performance, and hence is worth quantifying how much gain it can bring. To solve the problem, we design a suboptimal algorithm to firstly decompose the original problem into multiple convex subproblems by fixing power allocation for each beam, and secondly adjust beam power to improve the minimum OCTR in iterations. Numerical results show the convergence of the proposed algorithm and the superiority of the proposed NOMA scheme in max-min OCTR. ; Grant numbers : TERESA - Hybrid TERrEstrial/Satellite Air Interface for 5G and Beyond (TEC2017-90093-C3-1-R).© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.


    Access

    Download


    Export, share and cite



    Title :

    On Fairness Optimization for NOMA-Enabled Multi-Beam Satellite Systems


    Contributors:

    Publication date :

    2019-09-08



    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English


    Keywords :

    Classification :

    DDC:    629





    Robust Secure Precoding for NOMA Multi-beam Satellite Systems

    Huang, Mengyan / Li, Guo / Zhang, Nan et al. | IEEE | 2023


    Fairness Comparison of Uplink NOMA and OMA

    Wei, Zhiqiang / Guo, Jiajia / Ng, Derrick Wing Kwan et al. | IEEE | 2017


    A Unified NOMA Framework in Beam-Hopping Satellite Communication Systems

    Zhang, Xuyang / Yue, Xinwei / Li, Tian et al. | IEEE | 2023


    Energy-Efficient RIS-Enabled NOMA Communication for 6G LEO Satellite Networks

    Khan, Wali Ullah / Lagunas, Eva / Mahmood, Asad et al. | IEEE | 2023