For the features of high-speed and multiple-requirements of multiple users in 5G millimeter wave networks, in order to further enhance the downlink non-orthogonal multiple-access transmission in millimeter wave networks, a novel user pairing scheme based on angle and distance is proposed in this paper. This scheme fully considers the high directional beam-forming of the antenna array and the randomness of the user. The base station will choose to enable the nonorthogonal multiple access scheme based on the instantaneous spatial angle difference and the distance information between the paired users. Using methods from stochastic geometry, we derive the ergodic sum rate of the proposed scheme. Simulation results show that this scheme outperforms four other common user pairing schemes, and there is an optimal value of the distance threshold that maximizes the ergodic sum rate.
LU Xiaolin
,
ZHOU Yong
. A novel user pairing scheme for millimeter wave non-orthogonal multiple-access networks[J]. Journal of University of Chinese Academy of Sciences, 2022
, 39(2)
: 252
-259
.
DOI: 10.7523/j.ucas.2020.0016
[1] Benjebbovu A, Li A X, Saito Y, et al. System-level performance of downlink NOMA for future LTE enhancements[C]//2013 IEEE Globecom Workshops (GC Wkshps). December 9-13, 2013, Atlanta, GA, USA. IEEE, 2013: 66-70. DOI:10.1109/GLOCOMW.2013.6824963.
[2] Chen Y, Bayesteh A, Wu Y Q, et al. Toward the standardization of non-orthogonal multiple access for next generation wireless networks[J]. IEEE Communications Magazine, 2018, 56(3): 19-27. DOI:10.1109/MCOM.2018.1700845.
[3] Wong V W S, Vincent Ws, ed. Key technologies for 5G wireless systems[M]. Cambridge: Cambridge University Press, 2017. DOI:10.1017/9781316771655.
[4] Ding Z G, Fan P Z, Poor H V. Impact of user pairing on 5G nonorthogonal multiple-access downlink transmissions[J]. IEEE Transactions on Vehicular Technology, 2016, 65(8): 6010-6023. DOI:10.1109/TVT.2015.2480766.
[5] Liu Y W, Ding Z G, Elkashlan M, et al. Cooperative non-orthogonal multiple access with simultaneous wireless information and power transfer[J]. IEEE Journal on Selected Areas in Communications, 2016, 34(4): 938-953. DOI:10.1109/JSAC.2016.2549378.
[6] Zhou Y, Wong V W S, Schober R. Stable throughput regions of opportunistic NOMA and cooperative NOMA with full-duplex relaying[J]. IEEE Transactions on Wireless Communications, 2018, 17(8): 5059-5075. DOI:10.1109/TWC.2018.2837014.
[7] Senel K, Cheng H V, Björnson E, et al. What role can NOMA play in massive MIMO?[J]. IEEE Journal of Selected Topics in Signal Processing, 2019, 13(3): 597-611. DOI:10.1109/JSTSP.2019.2899252.
[8] Wei Z Q, Yang L, Ng D W K, et al. On the performance gain of NOMA over OMA in uplink communication systems[J]. IEEE Transactions on Communications, 2020, 68(1): 536-568. DOI:10.1109/TCOMM.2019.2948343.
[9] Pi Z Y, Khan F. An introduction to millimeter-wave mobile broadband systems[J]. IEEE Communications Magazine, 2011, 49(6): 101-107. DOI:10.1109/MCOM.2011.5783993.
[10] Bai T Y, Heath R W. Coverage and rate analysis for millimeter-wave cellular networks[J]. IEEE Transactions on Wireless Communications, 2015, 14(2): 1100-1114. DOI:10.1109/TWC.2014.2364267.
[11] Yu X H, Zhang J, Haenggi M, et al. Coverage analysis for millimeter wave networks: the impact of directional antenna arrays[J]. IEEE Journal on Selected Areas in Communications, 2017, 35(7): 1498-1512. DOI:10.1109/JSAC.2017.2699098.
[12] Ding Z G, Fan P Z, Poor H V. Random beamforming in millimeter-wave NOMA networks[J]. IEEE Access, 2017, 5: 7667-7681. DOI:10.1109/ACCESS.2017.2673248.
[13] Sun Y S, Ding Z G, Dai X C. On the performance of downlink NOMA in multi-cell mmWave networks[J]. IEEE Communications Letters, 2018, 22(11): 2366-2369. DOI:10.1109/LCOMM.2018.2870442.
[14] Yi W Q, Liu Y W, Nallanathan A, et al. Clustered millimeter wave networks with non-orthogonal multiple access[J]. IEEE Transactions on Communications, 2019,67(6): 4350-4364. DOI:10.1109/TCOMM.2019.2897632.
[15] Zhou Y, Wong V W S, Schober R. Coverage and rate analysis of millimeter wave NOMA networks with beam misalignment[J]. IEEE Transactions on Wireless Communications, 2018, 17(12): 8211-8227. DOI:10.1109/TWC.2018.2874995.
[16] Lee G, Sung Y, Seo J. Randomly-directional beamforming in millimeter-wave multiuser MISO downlink[J]. IEEE Transactions on Wireless Communications, 2016, 15(2): 1086-1100. DOI: 10.1109/TWC.2015.2483493.
