User Clustering Scheme for Downlink of NOMA System = User Clustering Scheme for Downlink of NOMA System

다국어 초록 (Multilingual Abstract)

An improved clustering scheme based on user group is proposed. Every two users are grouped among N-users in the allowed system according to their link gain from large to small. Each user group is numbered sequentially. Two user clusters are obtained according to the principle of maximizing link gain difference for the users in the first and last user groups. The remaining user groups are added to the two existing user clusters according to the parity of the group number. The clustering should be clustered again among the users in either user cluster if the throughput summation of a user cluster in NOMA is less than that of these users in orthogonal multiple access. The simulation results show that the proposed clustering scheme can increase the system throughput by about 8% compared with the hybrid clustering scheme when the number of users requiring service is 12.

참고문헌 (Reference)

1 Z. Q. Al-Abbasi, "User-Pairing Based Non-Orthogonal Multiple maAccess(NOMA)System" 1-5, 2016

2 M．B．Shahab, "User pairing schemes for capacity maximization in non-orthogonal multiple access systems" 16 (16): 2884-2894, 2016

3 ZHANG H, "User pairing algorithm with SIC in non-orthogonal multiple access system" 1-6, 2016

4 Dehuan Wan, "User Pairing Strategy : A Novel Scheme for Non-Orthogonal Multiple Access Systems" 1-6, 2017

5 L. Song, "Resource management in non-orthogonal multiple access systems : State of the art and research challenges"

6 FENG Z H, "Research on maximum number of users in downlink cluster of non-orthogonal multiple access system" 48 (48): 5-6, 2019

7 LIU F, "Proportional fairness-based user pairing and power allocation for non-orthogonal multiple access" 1127-1131, 2015

8 ISLAM S M R, "Power-domain non-orthogonal multiple access(NOMA)in 5G systems : potentials and challenges" 19 (19): 721-742, 2016

9 L. Lei, "Power and channel allocation for non-orthogonal multiple access in 5G systems : Tractability and computation" 15 (15): 8580-8594, 2016

10 PARIDA P, "Power allocation in OFDM based NOMA systems : A DC programming approach" 1026-1031, 2014

11 N. Otao, "Performance of non-orthogonal access with SIC in cellular downlink using proportional fair-based resource allocation" 98 (98): 344-351, 2015

12 Z. Ding, "On the performance of non-orthogonal multiple access in 5G systems with randomly deployed users" 21 (21): 1501-1505, 2014

13 Zhaohui Yang, "On the optimality of power allocation for NOMA downlinks with individual Qos constraints" 21 (21): 1649-1652, 2017

14 XU W, "Joint Sensing Duration Adaptation, User Matching, and Power Allocation for Cognitive OFDM-NOMA Systems" 17 (17): 1269-1282, 2018

15 Ding Z, "Impact of user pairing on 5G non-orthogonal multiple access downlink transmissions" 65 (65): 6010-6023, 2015

16 S. Timotheou, "Fairness for non-orthogonal multiple access in 5G systems" 22 (22): 1647-1651, 2015

17 M. S. Ali, "Dynamic user clustering and power allocation for uplink and downlink non-orthogonal multiple access(NOMA)systems" 4 : 6325-6343, 2016

18 J. Chen, "Coverage and Handoff Analysis of 5G Fractal Small Cell Networks" 18 (18): 1263-1276, 2019

19 Yingmin Wang, "Analysis of Non-Orthogonal Multiple Access for 5G" 13 (13): 52-56, 2016

20 Z. Yang, "A general power allocation scheme to guarantee quality of service in downlink and uplink NOMA systems" 15 (15): 7244-7257, 2016

21 M．B．Shahab, "A Time Sharing Based Approach to Accommodate Similar Gain Users in NOMA for 5G Networks" 142-147, 2017

22 Y Jiang, "A New Small-World IoT Routing Mechanism based on Cayley Graphs" 1-12, 2019