Resource Allocation for Downlink NOMA Systems: Key Techniques and Open Issues
TLDR
In this paper, the authors proposed a divide-and-next-largest-difference-based user pairing algorithm to distribute the capacity gain among the NOMA clusters in a controlled manner.Abstract:
This article presents advances in resource allocation for downlink non-orthogonal multiple access (NOMA) systems, focusing on user pairing and power allocation algorithms. The former pairs the users to obtain high capacity gain by exploiting the channel gain difference between the users, while the latter allocates power to users in each cluster to balance system throughput and user fairness. Additionally, the article introduces the concept of cluster fairness and proposes the divide-and-next-largest-difference-based user pairing algorithm to distribute the capacity gain among the NOMA clusters in a controlled manner. Furthermore, performance comparison between multiple-input multiple-output NOMA (MIMO-NOMA) and MIMO orthogonal multiple access (MIMO-OMA) is conducted when users have pre-defined quality of service. Simulation results are presented, which validate the advantages of NOMA over OMA. Finally, the article provides avenues for further research on resource allocation for downlink NOMA.read more
Citations
More filters
Proceedings ArticleDOI
Efficient Radio Resource Management with Coalition Games using NOMA in Small Cell Networks
Tafseer Akhtar,Panagiotis Georgakopoulos,Christos Mavrokefalidis,Artur Pereira,Vipindev Adat,Christos Tselios,Ilias Politis +6 more
TL;DR: In this paper, a cooperative coalition game scenario with joint transmission coordinated multi-point (JT-CoMP), non-orthogonal multiple access (NOMA), multi-user multiple-input multiple-output (MD-MIMO) and zero-forcing beamforming (ZFB) is compared with No JT-coMP, and results indicate the significant overall improvement over it.
Journal ArticleDOI
Transmit beamformer based performance analysis and diversity gains of cell edge user in cooperative MISO-NOMA system
TL;DR: This paper investigates the cell-edge user’s performance in a two-user multiple-input single-output non-orthogonal multiple access (MISO-NOMA) systems using downlink beamformers for optimal power allocation and achieves diversity gain.
Journal ArticleDOI
Outage performance and optimal design of MIMO-NOMA enhanced small cell networks with imperfect channel-state information
TL;DR: In this paper, the outage probability of MIMO-NOMA enhanced SCNs is derived in closed-form by taking into account two grouping policies, including random grouping and distance-based grouping.
Proceedings ArticleDOI
The Effect of User Pairing Strategies on the Downlink Throughput of NOMA
TL;DR: This paper has proposed two user pairing strategies and analysed the performance to determine which strategy could overcome the issue and proposed a new pairing strategy that can balance the performance between the cell edge and cell centred users.
Journal ArticleDOI
Energy-Constrained Uncoordinated Multiple Access for Next-Generation Networks
TL;DR: This article analyzes the performance of a distributed joint power/packet diversity random access scheme in the presence of energy requirements and discusses the influence of several nonidealities, including imperfect IC and packet overhead.
References
More filters
Journal ArticleDOI
Non-orthogonal multiple access for 5G: solutions, challenges, opportunities, and future research trends
TL;DR: The concept of software defined multiple access (SoDeMA) is proposed, which enables adaptive configuration of available multiple access schemes to support diverse services and applications in future 5G networks.
Journal ArticleDOI
Fair end-to-end window-based congestion control
Jeonghoon Mo,Jean Walrand +1 more
TL;DR: The existence of fair end-to-end window-based congestion control protocols for packet-switched networks with first come-first served routers is demonstrated using a Lyapunov function.
Journal ArticleDOI
Power-Domain Non-Orthogonal Multiple Access (NOMA) in 5G Systems: Potentials and Challenges
TL;DR: This paper comprehensively surveys the recent progress of NOMA in 5G systems, reviewing the state-of-the-art capacity analysis, power allocation strategies, user fairness, and user-pairing schemes in NomA.
Journal ArticleDOI
Impact of User Pairing on 5G Nonorthogonal Multiple-Access Downlink Transmissions
TL;DR: Both analytical and numerical results are provided to demonstrate that F-NOMA can offer a larger sum rate than orthogonal MA, and the performance gain of F- NOMA over conventional MA can be further enlarged by selecting users whose channel conditions are more distinctive.
Journal ArticleDOI
Power-Domain Non-Orthogonal Multiple Access (NOMA) in 5G Systems: Potentials and Challenges
TL;DR: In this paper, the authors comprehensively survey the recent progress of NOMA in 5G systems, reviewing the state-of-the-art capacity analysis, power allocation strategies, user fairness, and user-pairing schemes in NOMAs.