Wireless Backhaul in 5G and Beyond: Issues, Challenges and Opportunities
Berke Tezergil, Ertan Onur

TL;DR
This survey reviews wireless backhaul technologies in 5G and beyond, discussing challenges, opportunities, and applications enabled by new tech like UAVs, mmWave, and massive MIMO, emphasizing standardization and security issues.
Contribution
It provides a comprehensive overview of current wireless backhaul issues, challenges, and future opportunities in 5G and beyond, integrating recent technological developments and standardization efforts.
Findings
Wireless backhaul is crucial for dense 5G networks.
New technologies enable wireless backhaul to replace fiber in many scenarios.
Security and standardization are key challenges for wireless backhaul deployment.
Abstract
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…
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Taxonomy
TopicsAdvanced Photonic Communication Systems · Telecommunications and Broadcasting Technologies · Optical Network Technologies
