Maximum Fairness Power Allocation Scheme in Downlink Multi-Cell NOMA Systems

doi:10.13190/j.jbupt.2020-050

Journal of Beijing University of Posts and Telecommunications ›› 2020, Vol. 43 ›› Issue (5): 130-136.doi: 10.13190/j.jbupt.2020-050

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Maximum Fairness Power Allocation Scheme in Downlink Multi-Cell NOMA Systems

TIAN Xin-ji, JIANG Qing-li

School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China

Received:2020-05-20 Published:2021-03-11

Abstract

Abstract: A power allocation scheme to maximize fairness is proposed for multi-cell downlink non-orthogonal multiple access (NOMA) systems with multi-cluster multi-user. Firstly, the power allocation optimization problem for maximizing fairness is constructed. Then, the relationship between the total power of a signal cluster and the users‘ rate in the cluster is derived under the criterion of maximum fairness, and based on this conclusion, the power allocation among users in the optimization problem is transformed into that among clusters. Finally, an inter cluster power allocation algorithm based on iterative is presented. This algorithm calculates the user's rate under the maximum fairness criterion by assigning average power for each cluster, and obtains the optimal powers by adjusting the cluster power of the cell with the maximum rate and the cluster power of the cell with the minimum rate. Simulations show that the proposed scheme outperform the existing schemes in terms of fairness.

Key words: multi-cells, non-orthogonal multiple access, maximum fairness, power allocation

CLC Number:

TN911.22

TIAN Xin-ji, JIANG Qing-li. Maximum Fairness Power Allocation Scheme in Downlink Multi-Cell NOMA Systems[J]. Journal of Beijing University of Posts and Telecommunications, 2020, 43(5): 130-136.

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Maximum Fairness Power Allocation Scheme in Downlink Multi-Cell NOMA Systems

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