Reference : A Comprehensive Survey on Resource Allocation for CRAN in 5G and Beyond Networks

	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Electrical & electronics engineering
	Focus Areas :	Security, Reliability and Trust
	To cite this reference:	http://hdl.handle.net/10993/44825

Title :	A Comprehensive Survey on Resource Allocation for CRAN in 5G and Beyond Networks
Language :	English
Author, co-author :	Ejaz, Waleed []
	Sharma, Shree Krishna [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom >]
	Saadat, Salman []
	Naeem, Mohammad []
	Anpalgan, Alagan []
	Chughtai, N. A. []
Publication date :	Jun-2020
Journal title :	Journal of Network and Computer Applications
Publisher :	Elsevier
Peer reviewed :	Yes (verified by ORBilu)
Audience :	International
ISSN :	1084-8045
e-ISSN :	1095-8592
City :	Atlanta
Country :	GE
Keywords :	[en] Cloud RAN ; Resource Allocation ; Optimization ; 5G ; Beyond 5G
Abstract :	[en] The diverse service requirements coming with the advent of sophisticated applications as well as a large number of connected devices demand for revolutionary changes in the traditional distributed radio access network (RAN). To this end, Cloud-RAN (CRAN) is considered as an important paradigm to enhance the performance of the upcoming fifth generation (5G) and beyond wireless networks in terms of capacity, latency, and connectivity to a large number of devices. Out of several potential enablers, efficient resource allocation can mitigate various challenges related to user assignment, power allocation, and spectrum management in a CRAN, and is the focus of this paper. Herein, we provide a comprehensive review of resource allocation schemes in a CRAN along with a detailed optimization taxonomy on various aspects of resource allocation. More importantly, we identity and discuss the key elements for efficient resource allocation and management in CRAN, namely: user assignment, remote radio heads (RRH) selection, throughput maximization, spectrum management, network utility, and power allocation. Furthermore, we present emerging use-cases including heterogeneous CRAN, millimeter-wave CRAN, virtualized CRAN, Non- Orthogonal Multiple Access (NoMA)-based CRAN and fullduplex enabled CRAN to illustrate how their performance can be enhanced by adopting CRAN technology. We then classify and discuss objectives and constraints involved in CRAN-based 5G and beyond networks. Moreover, a detailed taxonomy of optimization methods and solution approaches with different objectives is presented and discussed. Finally, we conclude the paper with several open research issues and future directions.
Permalink :	http://hdl.handle.net/10993/44825
Other URL :	https://doi.org/10.1016/j.jnca.2020.102638

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