Super high bit rate radio access technologies for small cells using higher frequency bands

Abstract

This paper overviews super high bit rate radio access technologies using higher frequency bands for future radio access for 5G. In small cells using higher frequency bands based on the Phantom Cell concept in which radio links for the control (C)-plane and user (U)-plane are separately connected to a macro cell and small cell, radio access technologies employing Massive Multiple-Input Multiple-Output (MIMO) are described that achieve super high bit rate transmission. Specifically, on the basis of 11 GHz band 8×16 MIMO and 24×24 MIMO preliminary investigations, we estimate the required transmission power for 20 Gbps transmission in 20 GHz band Massive MIMO. In addition, we show the basic performance of 20 GHz band Massive MIMO based on link level simulations.