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Paper Abstract and Keywords
Presentation 2019-12-20 14:55
28GHz Band 5G Experimental Trial in High Mobility Environment Using the Shinkansen
Nopbuhide Nonaka, Kazushi Muraoka, Tatsuki Okuyama, Satoshi Suyama, Yukihiko Okumura, Takahiro Asai (NTT DOCOMO), Yoshihiro Matsumura (JR Central) RCS2019-264
Abstract (in Japanese) (See Japanese page) 
(in English) Commercial services in fifth-generation (5G) mobile communication system will start by using 3.7 GHz, 4.5 GHz, and 28 GHz bands in Japan. Especially, in the 28 GHz band, the higher bit-rate transmission attracts much attention because the wider bandwidth of 400 MHz is available. On the other hand, for further enhancement of 5G (5G evolution), it is expected that the more stable high bit-rate transmission using high SHF bands such as 28 GHz or EHF bands is realized even in high-mobility environments such as high-speed trains. We conducted 5G experimental trials employing 28 GHz-band 5G experimental systems that implement beamforming and beam tracking functions in railway environments where a train travels at a velocity of almost 100 km/h, and verified the feasibility of the stable high bit-rate transmission. However, in future 5G use cases in the Shinkansen, a dynamic change of the beam direction and the larger Doppler shift may cause performance degradation of the 28 GHz-band transmission. Thus, we have conducted a 28 GHz-band 5G experimental trial using an actual high-speed bullet train that runs at a maximum speed of 283 km/h. This report introduces a 28 GHz-band 5G experimental system used for the 5G experimental trial and detailed experimental configuration where three base stations were deployed along rail track of the Tokaido Shinkansen and a mobile station was set in a vehicle, and clarifies downlink transmission performances measured in such a high-mobility environment.
Keyword (in Japanese) (See Japanese page) 
(in English) 5G / High-speed train / High mobility / Massive MIMO / Beamforming / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 345, RCS2019-264, pp. 145-150, Dec. 2019.
Paper # RCS2019-264 
Date of Issue 2019-12-12 (RCS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee NS RCS  
Conference Date 2019-12-19 - 2019-12-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Memorial Hall of Alumni(Engineering), Tokushima Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Multi-hop/Relay/Cooperation, Disaster-resistant wireless network, Sensor/Mesh network, Ad-hoc network, D2D/M2M, Wireless network coding, Handover/AP switching/Connected cell control/Load balancing among base stations/Mobile network dynamic reconfiguration, QoS/QoE assurance, Wireless VoIP, IoT, Edge computing, etc. 
Paper Information
Registration To RCS 
Conference Code 2019-12-NS-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) 28GHz Band 5G Experimental Trial in High Mobility Environment Using the Shinkansen 
Sub Title (in English)  
Keyword(1) 5G  
Keyword(2) High-speed train  
Keyword(3) High mobility  
Keyword(4) Massive MIMO  
Keyword(5) Beamforming  
1st Author's Name Nopbuhide Nonaka  
1st Author's Affiliation NTT DOCOMO, INC (NTT DOCOMO)
2nd Author's Name Kazushi Muraoka  
2nd Author's Affiliation NTT DOCOMO, INC (NTT DOCOMO)
3rd Author's Name Tatsuki Okuyama  
3rd Author's Affiliation NTT DOCOMO, INC (NTT DOCOMO)
4th Author's Name Satoshi Suyama  
4th Author's Affiliation NTT DOCOMO, INC (NTT DOCOMO)
5th Author's Name Yukihiko Okumura  
5th Author's Affiliation NTT DOCOMO, INC (NTT DOCOMO)
6th Author's Name Takahiro Asai  
6th Author's Affiliation NTT DOCOMO, INC (NTT DOCOMO)
7th Author's Name Yoshihiro Matsumura  
7th Author's Affiliation Central Japan Railway Company (JR Central)
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Date Time 2019-12-20 14:55:00 
Presentation Time 25 
Registration for RCS 
Paper # IEICE-RCS2019-264 
Volume (vol) IEICE-119 
Number (no) no.345 
Page pp.145-150 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2019-12-12 

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