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Enhancing User Fairness in NOMA for Downlink CoMP Networks

Chia-An Ku and Char-Dir Chung
Graduate Institute of Communication Engineering, National Taiwan University

Abstract—Non-orthogonal multiple access (NOMA) can be effectively integrated in downlink coordinated multipoint (CoMP) mobile networks to enhance transmission performance, particularly at cell boundaries. In this paper, the user fairness in joint-transmission NOMA (JT-NOMA) is investigated. To enhance the user fairness, the α-fairness JT-NOMA scheme and the product-rate-based JT-NOMA scheme are proposed. It is shown that the product-rate-based JT-NOMA scheme can provide comparable sum-rate performance to conventional JT-NOMA scheme while yielding better user fairness, and that the α-fairness JT-NOMA scheme can provide flexible user fairness by adjusting the factor α
Index Terms—Non-orthogonal multiple access, coordinated multipoint, sum rate maximization, product rate maximization, user fairness.

Cite: Chia-An Ku and Char-Dir Chung, "Enhancing User Fairness in NOMA for Downlink CoMP Networks," Journal of Communications, vol. 14, no. 4, pp. 312-317, 2019. Doi: 10.12720/jcm.14.4.312-317