A comprehensive survey on resource allocation for CRAN in 5G and beyond networks
作者： Waleed Ejaz , Shree K. Sharma , Salman Saadat , Muhammad Naeem , Alagan Anpalagan
DOI: 10.1016/J.JNCA.2020.102638
关键词: Computer science 、 Distributed computing 、 Spectrum management 、 Throughput maximization 、 Wireless network 、 Radio access network 、 Network utility 、 Resource allocation
摘要: Abstract The diverse service requirements coming with the advent of sophisticated applications as well a large number connected devices demand for revolutionary changes in traditional distributed radio access network (RAN). To this end, Cloud-RAN (CRAN) is considered an important paradigm to enhance performance upcoming fifth generation (5G) and beyond wireless networks terms capacity, latency, connectivity devices. Out several potential enablers, efficient resource allocation can mitigate various challenges related user assignment, power allocation, spectrum management CRAN, focus paper. Herein, we provide comprehensive review schemes CRAN along detailed optimization taxonomy on aspects allocation. More importantly, identity discuss key elements namely: remote heads (RRH) selection, throughput maximization, management, utility, Furthermore, present emerging use-cases including heterogeneous millimeter-wave virtualized Non-Orthogonal Multiple Access (NoMA)-based full-duplex enabled illustrate how their be enhanced by adopting technology. We then classify objectives constraints involved CRAN-based 5G networks. Moreover, methods solution approaches different presented discussed. Finally, conclude paper open research issues future directions.
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