28 GHz-Band Experimental Trial Using the Shinkansen in Ultra High-Mobility Environment for 5G Evolution

Nobuhide NONAKA  Kazushi MURAOKA  Tatsuki OKUYAMA  Satoshi SUYAMA  Yukihiko OKUMURA  Takahiro ASAI  Yoshihiro MATSUMURA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E104-B    No.9    pp.1000-1008
Publication Date: 2021/09/01
Publicized: 2021/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2020FGP0011
Type of Manuscript: Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G Evolution and Beyond)
Category: 
Keyword: 
5G evolution,  massive MIMO,  ultra high-mobility,  high speed train,  28GHz band,  

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Summary: 
In order to enhance the fifth generation (5G) mobile communication system further toward 5G Evolution, high bit-rate transmission using high SHF bands (28GHz or EHF bands) should be more stable even in high-mobility environments such as high speed trains. Of particular importance, dynamic changes in the beam direction and the larger Doppler frequency shift can degrade transmission performances in such high frequency bands. Thus, we conduct the world's first 28 GHz-band 5G experimental trial on an actual Shinkansen running at a speed of 283km/h in Japan. This paper introduces the 28GHz-band experimental system used in the 5G experimental trial using the Shinkansen, and then it presents the experimental configuration in which three base stations (BSs) are deployed along the Tokaido Shinkansen railway and a mobile station is located in the train. In addition, transmission performances measured in this ultra high-mobility environment, show that a peak throughput of exceeding 1.0Gbps and successful consecutive BS connection among the three BSs.