Distributed User Clustering and Resource Allocation for Imperfect NOMA in Heterogeneous Networks
Type
ArticleAuthors
Celik, Abdulkadir
Tsai, Ming-Cheng
Radaydeh, Redha M.
Al-Qahtani, Fawaz S.
Alouini, Mohamed-Slim

KAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionElectrical Engineering
Electrical Engineering Program
Date
2019-07-09Online Publication Date
2019-07-09Print Publication Date
2019Permanent link to this record
http://hdl.handle.net/10754/656151
Metadata
Show full item recordAbstract
In this paper, we propose a distributed cluster formation (CF) and resource allocation (RA) framework for non-ideal non-orthogonal multiple access (NOMA) schemes in heterogeneous networks. The imperfection of the underlying NOMA scheme is due to the receiver sensitivity and interference residue from non-ideal successive interference cancellation (SIC), which is generally characterized by a fractional error factor (FEF). Our analytical findings first show that several factors have a significant impact on the achievable NOMA gain. Then, we investigate fundamental limits on NOMA cluster size as a function of FEF levels, cluster bandwidth, and quality of service (QoS) demands of user equipments (UEs). Thereafter, a clustering algorithm is developed by taking feasible cluster size and channel gain disparity of UEs into account. Finally, we develop a distributed α-fair RA framework where α governs the trade-off between maximum throughput and proportional fairness objectives. Based on the derived closed-form optimal power levels, the proposed distributed solution iteratively updates bandwidths, clusters, and UEs’ transmission powers. Numerical results demonstrate that proposed solutions deliver a higher spectral and energy efficiency than traditionally adopted basic NOMA cluster size of two. We also show that an imperfect NOMA cannot always provide better performance than orthogonal multiple access under certain conditions. Finally, our numerical investigations reveal that NOMA gain is maximized under downlink/uplink decoupled (DUDe) UE association.Citation
Celik, A., Tsai, M.-C., Radaydeh, R. M., Al-Qahtani, F. S., & Alouini, M.-S. (2019). Distributed User Clustering and Resource Allocation for Imperfect NOMA in Heterogeneous Networks. IEEE Transactions on Communications, 67(10), 7211–7227. doi:10.1109/tcomm.2019.2927561Sponsors
This work was supported by NPRP from the Qatar National Research Fund under grant no. 8-1545-2-657. A part of this paper has been presented at IEEE GLOBECOM 2018, Singapore [1].Additional Links
https://ieeexplore.ieee.org/document/8758326/https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8758326
ae974a485f413a2113503eed53cd6c53
10.1109/TCOMM.2019.2927561