… We also identify several research challenges in these promising design trends that beyond-5G
… trends and associated research challenges in beyond-5G networks in Sections IV and V. …

… We discuss all the fundamental challenges related to pilot contamination, channel estimation,
… issues that direct future research in massive MIMO systems for 5G and beyond networks. …

… and aerial access networks can bring manifold benefits, [5]–[7]: i) extend 5G services in … ;
ii) improve the 5G service reliability and continuity; and iii) enable 5G networks scalability and …

… UDNs in 5G and beyond wireless networks, discuss approaches and techniques to overcome
the obstacles when accomplishing the resource allocation, and debate challenges as well …

… (5G) and beyond networks creates various non-conventional communication challenges
and … In this regard, the authors in [43] highlighted the current and future trends of VR systems …

… mission-critical cases, and predecessor’s limitations [38]. The future 5G networks demand
a new and stringent mobility management mechanism [39]. The rising trend for the mobility …

… , and issues that decrease the signal quality. We also present studies on 5G network
technologies, 5G propelling trends, and architectures that help to achieve the goals of 5G. Moreover…

… , ultra-massive MIMO, and extremely dense network show this trend as well. In this survey, …
moves on to beyond-5G, we present the works on beyond-5G and 6G networks that may be …

… by capturing some trends in emerging use cases and their requirements. Several use cases
are … We then took this network densification growth factor in conjunction with the bandwidth …

… This paper presents AI-assisted technologies, scenarios and application for security of
5G and beyond wireless networks. The highly dynamic traffic patterns, service-based …