A Brief Overview of 5G Research Activities

Abstract

This paper summarizes the main initiatives toward 5G wireless communication networks. Emphasis is paid on the program and project activities as well as on the recent literature. A closer look to a wide range of European Union 5G related projects is conducted. Literature review is restricted to recent thematic IEEE Communications Magazine 5G issues and relevant white papers from different sources. The aim is to shed some light on what 5G is about: what are the building blocks of core 5G system concept, what are the main challenges and how to tackle them. The studied references indicate that in addition to capacity boosting technologies 5G needs to offer, e.g., low latency, ultra-reliable communications, and massive connectivity. Thus, the most demanding part in 5G development will be the design of flexible enough system concept platform that allows successful integration and management of various distinct technologies optimized for diverse use cases.

Learning-Based Spectrum Sharing and Spatial Reuse in mm-Wave Ultradense Networks

“…A TTRIBUTED to the explosive development of wireless communications, the data traffic has been growing in an exponential manner [1]. As one of the core features in the emerging 5G communications, ultra-dense networks (UDN) has attached extensive investigations [2].…”

Frame design for 5G multicarrier modulations

“…From both channel In Figure 3 the computed MSE for different pilots configuration is depicted: particularly, the pilots density within the reference LTE downlink subframe has been varied. This result allows to consider communication scenarios where the pilot density has to be varied so adapting the transmission rate to the corresponding traffic as foreseen in the 5G communications [4], or where the frame dimension has to be changed in order to exploit the white spaces [5] [6]. Thanks to our model the pilot symbol pattern can be defined by resorting to an exaustive research for all the possible value of the pilot pattern parameters [18].…”

“…Furthermore, since OFDM presents a low spectral efficiency due to the insertion of ciclix prefix in each OFDM symbol, it is not suitable neither for tactile internet scenario nor in the vehicle-to-vehicle (V2V) communication as well as in the wireless regional area networks (WRAN) applications. Additionally, the high OOB emissions of OFDM raises problems for dynamic spectrum access as well as for the exploitation of the white space [4] [5].…”

5G Coupler Design for Intelligent Transportation System (ITS) Application

“…As it is still considered as a new technology, few encounters need to be attended in order to change from fourth generation (4G) technology to 5G [2][3]. These include the security for the system, limitation in the frequency spectrum resources, the choice among various wireless system, network infrastructure and QoS support, jamming and spoofing and last but not least, the multi-mode user terminals [4][5].…”