A non-orthogonal multiple access (NOMA) system is now considered as a promising radio access technique for next-generation networks owing to its benefits, e.g. spectral efficiency improvement. Due to the successive interference cancellation order at receivers, fairness among users in NOMA may not be guaranteed. In this study, the authors focus on $α$ -fair resource allocation in NOMA. The complexity of the considered problem is then analysed. In particular, the problem is shown to be convex when $1 ≤ α < ∞$ and $α = ∞$ , non-deterministic polynomial-time (NP)-hard when $0 < α < 1$ , and polynomial-time solvable when $α = 0$ . Finally, simulation results are provided to examine the effects of the fairness degree on the system performance and verify the effectiveness of the proposed algorithms.

References

1. 1)
  - 10. Pham, Q.V., Hwang, W.J.: ‘Fairness-aware spectral and energy efficiency in spectrum-sharing wireless networks’, IEEE Trans. Veh. Technol., 2017, PP, (99), pp. 1–1.
2. 2)
  - 3. Timotheou, S., Krikidis, I.: ‘Fairness for non-orthogonal multiple access in 5G systems’, . Lett. IEEE Signal Process. Lett., 2015, 22, (10), pp. 1647–1651.
3. 3)
  - 11. Tse, D., Viswanath, P.: ‘Fundamentals of wireless communication’ (Cambridge University Press, Cambridge, UK, 2005).
4. 4)
  - 1. Panwar, N., Sharma, S., Singh, A.K.: ‘A survey on 5g: the next generation of mobile communication’, Phys. Commun., 2016, 18, (Part 2), pp. 64–84, special Issue on Radio Access Network Architectures and Resource Management for 5G.
5. 5)
  - 13. Wang, J., Peng, Q., Huang, Y., et al: ‘Convexity of weighted sum rate maximization in noma systems’, IEEE Signal Process. Lett., 2017, 24, (9), pp. 1323–1327.
6. 6)
  - 9. Guo, C., Zhang, Y., Sheng, M., et al: ‘Alpha-fair power allocation in spectrum-sharing networks’, IEEE Trans. Veh. Technol., 2016, 65, (5), pp. 3771–3777.
7. 7)
  - 15. Boyd, S., Vandenberghe, L.: ‘Convex optimization’ (Cambridge University Press, Cambridge, UK, 2009).
8. 8)
  - 8. Yang, Z., Xu, W., Li, Y.: ‘Fair non-orthogonal multiple access for visible light communication downlinks’, IEEE Wirel. Commun. Lett., 2017, 6, (1), pp. 66–69.
9. 9)
  - 12. Mo, J., Walrand, J.: ‘Fair end-to-end window-based congestion control’, IEEE ACM. Trans. Netw., 2000, 8, (5), pp. 556–567.
10. 10)
  - 5. Lei, L., Yuan, D., Ho, C.K., et al: ‘Power and channel allocation for non-orthogonal multiple access in 5G systems: tractability and computation’, IEEE Trans. Wirel. Commun., 2016, 15, (12), pp. 8580–8594.
11. 11)
  - 4. Di, B., Song, L., Li, Y.: ‘Sub-channel assignment, power allocation, and user scheduling for non-orthogonal multiple access networks’, IEEE Trans. Wirel. Commun., 2016, 15, (11), pp. 7686–7698.
12. 12)
  - 2. Shin, W., Vaezi, M., Lee, B., et al: ‘Non-orthogonal multiple access in multi-cell networks: theory, performance, and practical challenges’, IEEE Commun. Mag., 2017, 55, (10), pp. 176–183.
13. 13)
  - 7. Choi, J.: ‘Power allocation for max-sum rate and max–min rate proportional fairness in noma’, IEEE Commun. Lett., 2016, 20, (10), pp. 2055–2058.
14. 14)
  - 6. Zhao, J., Liu, Y., Chai, K.K., et al: ‘Spectrum allocation and power control for non-orthogonal multiple access in hetnets’, IEEE Trans. Wirel. Commun., 2017, PP, (99), pp. 1–1.
15. 15)
  - 14. Luo, Z.Q., Zhang, S.: ‘Dynamic spectrum management: complexity and duality’, IEEE J. Sel. Top. Signal Process., 2008, 2, (1), pp. 57–73.

$α$ -Fair resource allocation in non-orthogonal multiple access systems

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<mml:math> <mml:mi>α</mml:mi> </mml:math> -Fair resource allocation in non-orthogonal multiple access systems

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$α$ -Fair resource allocation in non-orthogonal multiple access systems