Abstract

Nowadays, the huge demands on bandwidth, mobility and practically zero delays, cannot be met by existing technologies. The large number of smart devices, tablets and other interconnected devices dramatically increased the demands on the network side. A key objective of the 5th generation mobile communications networks (5G) is to provide continuous high-speed connection. The objectives of the network include among others the great energy efficiency with environmental friendliness, safety and reliability. The 5th generation networks are designed to support the Internet of things, allowing the connection to Internet of sensors, detectors and other devices

In this thesis, the first chapter introduces the 5th generation networks, the possibilities they offer to the users and the fields of their application in everyday life. Also, in the same chapter, users’ expectations regarding 5th generation networks and the improvement potential of these networks is presented.

The second chapter targets the issues of the backhaul link of the 5th generation networks. In particular, there is an extensive analysis of the challenges in terms of the frequency spectrum management of these networks and the backhaul energy efficiency. Both these factors are highly associated with the cell density of the future network.

In the third chapter recent simulations results of the use of UAVs (Unmanned Aerial Vehicles) in the 5th generation networks in order to optimally cover and serve the users when the network infrastructure is out of service are presented.

Lastly, this thesis is completed with chapter four where conclusions and future challenges of the internet of UAVs in the framework of 5th generation network are derived.