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Radio resource management considerations for 5G millimeter wave backhaul and access networks

: Li, Y.; Pateromichelakis, E.; Vucic, N.; Luo, J.; Xu, W.; Caire, G.


IEEE Communications Magazine 55 (2017), No.6, pp.86-92
ISSN: 0163-6804
European Commission EC
H2020; 671650; mmMAGIC
Millimetre-Wave Based Mobile Radio Access Network for Fifth Generation Integrated Communications
European Commission EC
H2020; 671551; 5G-XHaul
Dynamically Reconfigurable Optical-Wireless Backhaul/Fronthaul with Cognitive Control Plane for Small Cells and Cloud-RANs
European Commission EC
H2020; 671680; METIS-II
Mobile and wireless communications Enablers for Twenty-twenty (2020) Information Society-II
Journal Article
Fraunhofer HHI ()

Millimeter-wave frequencies between 6 and 100 GHz provide orders of magnitude larger spectrum than current cellular allocations and allow usage of large numbers of antennas for exploiting beamforming and spatial multiplexing gains. In this article, we describe the main design concepts when integrating mmWave RANs into 5G systems, considering aspects such as spectrum, architecture, and backhauling/fronthauling. The corresponding RRM challenges, extended RRM functionalities for 5G mmWave RAN, and RRM splits are addressed. Finally, based on these discussions, a framework is proposed that allows joint backhaul and access operation for 5G mmWave RAN, which we envisage as one of the key innovative technologies in 5G. The proposed framework consists of a joint scheduling and resource allocation algorithm to improve resource utilization efficiency with low computational complexity and to fully exploit spatial multiplexing gain for fulfilling user demands.