On the Performance of Opportunistic NOMA in Downlink CoMP Networks

Tian, Yue; Nix, Andrew R; Beach, M.A.

doi:10.1109/lcomm.2016.2545672

Cited by 88 publications

(68 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For JPO, the optimal power allocation is obtained by searching ten thousand points over the feasible power range in each CoMP-BS, i.e., search step size is p t /10000. For DPO, we use (11) and (14) to obtain the achievable data rate for non-CoMP users and CoMP users, respectively. In each NOMA cluster, we use one/multiple CoMP-UE but the number of non-CoMP-UEs is restricted to one, and thus no offset ICI is used under the DPO approach.…”

Section: A Simulation Assumptionsmentioning

confidence: 99%

Downlink Power Allocation for CoMP-NOMA in Multi-Cell Networks

Ali

Hossain

Al-Dweik

et al. 2018

IEEE Trans. Commun.

191

115

View full text Add to dashboard Cite

This work considers the problem of dynamic power allocation in the downlink of multi-cell networks, where each cell utilizes non-orthogonal multiple access (NOMA)-based resource allocation. Also, coordinated multi-point (CoMP) transmission is utilized among multiple cells to serve users experiencing severe inter-cell interference (ICI).More specifically, we consider a two-tier heterogeneous network (HetNet) consisting of a high-power macro cell underlaid with multiple low-power small cells each of which uses the same resource block. Under this CoMP-NOMA framework, CoMP transmission is applied to a user experiencing high channel gain with multiple base stations (BSs)/cells, while NOMA is utilized to schedule CoMP and non-CoMP users over the same transmission resources, i.e., time, spectrum and space. Different CoMP-NOMA models are discussed, but focus is primarily on the joint transmission CoMP-NOMA (JT-CoMP-NOMA) model. For the JT-CoMP-NOMA model, an optimal joint power allocation problem is formulated and the solution is derived for each CoMP-set consisting of multiple cooperating BSs (i.e., CoMP BSs). To overcome the substantial computational complexity of the joint power optimization approach, we propose a distributed power optimization problem at each cooperating BS whose optimal solution is independent of the solution of other coordinating BSs. The validity of the distributed solution for the joint power optimization problem is provided and numerical performance evaluation is carried out for the proposed CoMP-NOMA models including JT-CoMP-NOMA and coordinated scheduling CoMP-NOMA (CS-CoMP-NOMA). The obtained results reveal significant gains in spectral and energy efficiency in comparison with conventional CoMPorthogonal multiple access (CoMP-OMA) systems. Index TermsNon-orthogonal multiple access (NOMA), coordinated multi-point (CoMP) transmission, multi-cell downlink transission, heterogeneous networks (HetNets), dynamic power allocation, spectral efficiency, energy efficiency.

show abstract

Section: A Simulation Assumptionsmentioning

confidence: 99%

Downlink Power Allocation for CoMP-NOMA in Multi-Cell Networks

Ali

Hossain

Al-Dweik

et al. 2018

IEEE Trans. Commun.

191

115

View full text Add to dashboard Cite

show abstract

“…In this work, 2-user NOMA is used in both the cells where the non-CoMP user is the cell-center user. Another work on downlink CoMP-NOMA can be found in [9], where an opportunistic CoMP-NOMA system is used for a group of cell-edge users which receive strong signals from all the coordinating cells. In this work, a joint multi-cell power allocation strategy is used based on the CoMP users' channel gains.…”

Section: Introductionmentioning

confidence: 99%

Coordinated Multipoint Transmission in Downlink Multi-Cell NOMA Systems: Models and Spectral Efficiency Performance

Ali

Hossain

Kim

2018

IEEE Wireless Commun.

View full text Add to dashboard Cite

We outline a general framework to use coordinated multi-point (CoMP) transmission technology in downlink multicell non-orthogonal multiple access (NOMA) systems considering distributed power allocation at each cell. In this framework, CoMP transmission is used for users experiencing strong receivesignals from multiple cells while each cell adopts NOMA for resource allocation to its active users. After a brief review of the working principles of different CoMP schemes, we identify their applicability and necessary conditions for their use in downlink multi-cell NOMA system. After that, we discuss different network scenarios with different spatial distributions of users and study the applicability of CoMP schemes in these network scenarios.To the end, a numerical performance evaluation is carried out for the proposed CoMP-NOMA systems and the results are compared with those for conventional orthogonal multiple access (OMA)-based CoMP systems. The numerical results quantify the spectral efficiency gain of the proposed CoMP-NOMA models over CoMP-OMA. Finally, we conclude this article by identifying the potential major challenges in implementing CoMP-NOMA in future cellular systems.Index Terms-5G cellular, non-orthogonal multiple access (NOMA), coordinated multi-point (CoMP) transmission, multicell downlink transmission, dynamic power allocation, spectral efficiency.2 In this article, a user requiring CoMP transmission is referred to as a CoMP-user, while a user who does not require a CoMP transmission is referred to as a non-CoMP-user.

show abstract

“…Furthermore, NOMA can be jointly designed with cooperative multiple point (CoMP) [9,109,110] or multipleantenna technology [41,[111][112][113]. Also, there have been some initial studies about employing NOMA in wireless power transfer network to increase the access opportunities [114][115][116].…”

Section: Joint Design With Othermentioning

confidence: 99%

Uplink Nonorthogonal Multiple Access Technologies Toward 5G: A Survey

Han

Zhao

et al. 2018

Wireless Communications and Mobile Computing

View full text Add to dashboard Cite

Owing to the superior performance in spectral efficiency, connectivity, and flexibility, nonorthogonal multiple access (NOMA) is recognized as the promising access protocol and is now undergoing the standardization process in 5G. Specifically, dozens of NOMA schemes have been proposed and discussed as the candidate multiple access technologies for the future radio access networks. This paper aims to make a comprehensive overview about the promising NOMA schemes. First of all, we analyze the state-of-the-art NOMA schemes by comparing the operations applied at the transmitter. Typical multiuser detection algorithms corresponding to these NOMA schemes are then introduced. Next, we focus on grant-free NOMA, which incorporates the NOMA techniques with uplink uncoordinated access and is expected to address the massive connectivity requirement of 5G. We present the motivation of applying grant-free NOMA, as well as the typical grant-free NOMA schemes and the detection techniques. In addition, this paper discusses the implementation issues of NOMA for practical deployment. Finally, we envision the future research challenges deduced from the recently proposed NOMA technologies.

show abstract

On the Performance of Opportunistic NOMA in Downlink CoMP Networks

Cited by 88 publications

References 9 publications

Downlink Power Allocation for CoMP-NOMA in Multi-Cell Networks

Downlink Power Allocation for CoMP-NOMA in Multi-Cell Networks

Coordinated Multipoint Transmission in Downlink Multi-Cell NOMA Systems: Models and Spectral Efficiency Performance

Uplink Nonorthogonal Multiple Access Technologies Toward 5G: A Survey

Contact Info

Product

Resources

About