Paper Info
Title
Joint Power Control and User Association for NOMA-Based Full-Duplex Systems
Abstract
This paper investigates the coexistence of non-orthogonal multiple access (NOMA) and full-duplex (FD) to improve both spectral efficiency (SE) and user fairness. In such a scenario, NOMA based on the successive interference cancellation technique is simultaneously applied to both uplink (UL) and downlink (DL) transmissions in an FD system. We consider the problem of jointly optimizing user association (UA) and power control to maximize the overall SE, subject to user-specific quality-of-service and total transmit power constraints. To be spectrally-efficient, we introduce the tensor model to optimize UL users’ decoding order and DL users’ clustering, which results in a mixed-integer non-convex problem. For practically appealing applications, we first relax the binary variables and then propose two low-complexity designs. In the first design, the continuous relaxation problem is solved using the inner convex approximation framework. Next, we additionally introduce the penalty method to further accelerate the performance of the former design. For a benchmark, we develop an optimal solution based on brute-force search (BFS) over all possible cases of UAs. It is demonstrated in numerical results that the proposed algorithms outperform the conventional FD-based schemes and its half-duplex counterpart, as well as yield data rates close to those obtained by BFS-based algorithm.
Year
DOI
Venue
2019
10.1109/TCOMM.2019.2933217
IEEE Transactions on Communications
Keywords
Field
DocType
NOMA,Decoding,Power control,Interference cancellation,Quality of service,Convergence
Noma,Computer science,Power control,Electronic engineering,Duplex (telecommunications)
Journal
Volume
Issue
ISSN
67
11
0090-6778
Citations 
PageRank 
References 
6
0.41
0
Authors
6
Name
Order
Citations
PageRank
Hieu V. Nguyen125417.89
Van-Dinh Nguyen217923.75
Octavia A. Dobre32064181.08
Diep N. Nguyen414226.31
Eryk Dutkiewicz5891122.78
Oh-Soon Shin662063.13