1 research outputs found
Wireless Backhaul in 5G and Beyond: Issues, Challenges and Opportunities
With the introduction of new technologies such as Unmanned Aerial Vehicle
(UAV), High Altitude Platform Station (HAPS), Millimeter Wave (mmWave)
frequencies, Massive Multiple-Input Multiple-Output (mMIMO), and beamforming,
wireless backhaul is expected to be an integral part of the 5G networks. While
this concept is nothing new, it was shortcoming in terms of performance
compared to the fiber backhauling. However, with these new technologies, fiber
is no longer the foremost technology for backhauling. With the projected
densification of networks, wireless backhaul has become mandatory to use. There
are still challenges to be tackled if wireless backhaul is to be used
efficiently. Resource allocation, deployment, scheduling, power management and
energy efficiency are some of these problems. Wireless backhaul also acts as an
enabler for new technologies and improves some of the existing ones
significantly. To name a few, rural connectivity, satellite communication, and
mobile edge computing are some concepts for which wireless backhauling acts as
an enabler. Small cell usage with wireless backhaul presents different security
challenges. Governing bodies of cellular networks have standardization efforts
going on especially for the Integrated Acces-Backhaul (IAB) concept, and this
is briefly mentioned. Finally, wireless backhaul is also projected to be an
important part of the beyond 5G networks, and newly developed concepts such as
cell-free networking, ultra-massive MIMO, and extremely dense network show this
trend as well. In this survey, we present the aforementioned issues,
challenges, opportunities, and applications of wireless backhaul in 5G, while
briefly mentioning concepts related to wireless backhaul beyond 5G alongside
with security and standardization issues