TY - JOUR
T1 - Joint Transmission Scheduling and Power Allocation in Non-Orthogonal Multiple Access
AU - Fu, Shu
AU - Fang, Fang
AU - Zhao, Lian
AU - Ding, Zhiguo
AU - Jian, Xin
N1 - Funding Information:
This work was partially supported by the National Natural Science Foundation of China (NSFC Project No. 61701054, 61728108); the Fundamental Research Funds for the Central University (Project No. 106112017CDJXY160002, 2018CDXYTX0009, 2018CDXYTX0011); The work of Zhiguo Ding was supported by the UK EPSRC under grant number EP/P009719/2 and by H2020-MSCA-RISE- 2015 under grant number 690750.
Funding Information:
Manuscript received March 31, 2019; revised July 25, 2019; accepted August 27, 2019. Date of publication September 5, 2019; date of current version November 19, 2019. This work was partially supported by the National Natural Science Foundation of China (NSFC Project No. 61701054, 61728108); the Fundamental Research Funds for the Central University (Project No. 106112017CDJXY160002, 2018CDXYTX0009, 2018CDXYTX0011); The work of Zhiguo Ding was supported by the UK EPSRC under grant number EP/P009719/2 and by H2020-MSCA-RISE-2015 under grant number 690750. The associate editor coordinating the review of this article and approving it for publication was R. C. De Lamare. (Corresponding author: Shu Fu.) S. Fu and X. Jian are with the College of Communication Engineering, Chongqing University, Chongqing 400044, China (e-mail: [email protected]; [email protected]).
Publisher Copyright:
© 1972-2012 IEEE.
PY - 2019/11
Y1 - 2019/11
N2 - Multi-carrier based non-orthogonal multiple access (NOMA) is an effective method to meet the ever-increasing demands of both user throughput and energy efficiency by multiplexing multiple users on the same carrier. Since interference from users with a poorer channel gain can be canceled at a user with a strong channel gain by successive interference cancellation, NOMA can enhance the system performance. To improve the downlink system performance, it is crucial to appropriately determine users scheduled on each carrier and power allocation at the base station. However, the existing works are generally either heuristic or local optimal due to the mixed optimization problem. In this paper, we focus on the global optimal solutions to maximize user throughput and energy efficiency in NOMA, respectively. In particular, we first formulate the mixed integer optimization problem which are intractable to be solved. Fortunately, by the provided analytical results, the optimization models can be largely simplified. Then, we propose the architectures of joint user scheduling and power allocation in NOMA, as well as the corresponding optimal algorithms. Simulation results demonstrate that our proposed algorithms indeed outperform existing works in terms of the user throughput and energy efficiency, respectively.
AB - Multi-carrier based non-orthogonal multiple access (NOMA) is an effective method to meet the ever-increasing demands of both user throughput and energy efficiency by multiplexing multiple users on the same carrier. Since interference from users with a poorer channel gain can be canceled at a user with a strong channel gain by successive interference cancellation, NOMA can enhance the system performance. To improve the downlink system performance, it is crucial to appropriately determine users scheduled on each carrier and power allocation at the base station. However, the existing works are generally either heuristic or local optimal due to the mixed optimization problem. In this paper, we focus on the global optimal solutions to maximize user throughput and energy efficiency in NOMA, respectively. In particular, we first formulate the mixed integer optimization problem which are intractable to be solved. Fortunately, by the provided analytical results, the optimization models can be largely simplified. Then, we propose the architectures of joint user scheduling and power allocation in NOMA, as well as the corresponding optimal algorithms. Simulation results demonstrate that our proposed algorithms indeed outperform existing works in terms of the user throughput and energy efficiency, respectively.
KW - joint design
KW - Non-orthogonal multiple access
KW - power allocation
KW - user scheduling
UR - http://www.scopus.com/inward/record.url?scp=85075597101&partnerID=8YFLogxK
U2 - 10.1109/TCOMM.2019.2939473
DO - 10.1109/TCOMM.2019.2939473
M3 - Article
AN - SCOPUS:85075597101
SN - 0090-6778
VL - 67
SP - 8137
EP - 8150
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
IS - 11
M1 - 8825823
ER -
