Jan 29, 2021 03:00 JST

Source: NTT DOCOMO

NTT DOCOMO and JR EAST Verify Stable 5G Communication aboard ALFA-X Shinkansen Test Train Running at 360km/h
Setting the stage for advanced, high-value mobility aboard high-speed trains

TOKYO, Jan 29, 2021 - (JCN Newswire) - NTT DOCOMO, INC. and East Japan Railway Company (JR East) jointly announced that they have verified the stable operation of important 5G communication capabilities, including handover between base stations and the transmission of high-definition video data, in trials conducted aboard JR East's ALFA-X(1) Shinkansen test train running at 360km/h. The trials confirmed that it will be possible to ensure stable mobile communication environments on high-speed trains for the delivery of high-value mobile services.

 


DOCOMO has been working to confirm the feasibility of 5G communication in high-speed environments since 2017. For the newly announced trials, experimental equipment conforming to international standard and specifications established by the 3rd Generation Partnership Project (3GPP(2)) was put through various trials conducted for the first time in Japan aboard ALFA-X running at 360km/h.

In general, communication quality at high speed becomes unstable due to influence of direct-path obstructions and the Doppler effect. This is especially true in the case of 5G, which uses relatively high-frequency bands that are more sensitive to physical obstructions and the Doppler effect compared to lower frequency bands used in legacy mobile communication networks.

Specifically, the trials confirmed the following three results aboard ALFA-X running at 360km/h:

- Maximum data rates exceeding 500Mbps and 100Mbps in the downlink and uplink, respectively, were verified and highly stable communication at 100Mbps or higher was achieved over a distance of approximately 5km, confirming the possibility of practical, reliable communication.

- Successful handover was confirmed while maintaining data rates at 100Mbps or higher.

- Both 4K and 8K high-definition video data transmissions were achieved, confirming the possibility of stable, large-capacity data transmissions. The data volumes transmitted in a communication time of about 60 seconds were as follows:
                       Download       Upload      Streaming
Amount of 4K data    30 minutes    7 minutes     60 seconds
Amount of 8K data    30 seconds   15 seconds     40 seconds
The trials confirmed that the newly developed 5G technology can stably transmit both 4K and 8K high-definition video in the ALFA-X running at 360km/h. Notably, the advanced capabilities of this new technology are expected to open up a wide range of high-value services for customers traveling on high-speed trains.

Trial Details
Trial period: October to December 2020
Location: Section of Tohoku Shinkansen Line between Sendai and Shin-Aomori stations
Running speed: 360km/h
Frequency: 4.85GHz (100MHz bandwidth)
Base stations: Two base stations within proximity (1.0-1.5km) of the railway
Mobile station: One mobile station aboard ALFA-X
Features: Beamforming, Beam tracking, Seamless handover and Doppler shift compensation DOCOMO and JR East will continue their collaboration aimed at providing practical, high-quality and high-value mobile communications environments aboard high-speed trains.

(1) ALFA-X: Advanced Labs for Frontline Activity in rail eXperimentation
(2) 3GPP is an international consortium comprising with seven telecommunication organizations engaged in developing standards for mobile communication systems.

Source: NTT DOCOMO
Sectors: Telecoms, 5G, Wireless, Apps

Copyright ©2021 JCN Newswire. All rights reserved. A division of Japan Corporate News Network.

Related Press Release


DOCOMO and Far EasTone Telecommunications to Collaborate On Streaming Multi-angle Video Content in Taiwan
September 01 2021 18:27 JST
 
DOCOMO Releases White Paper on 5G Open RAN Ecosystem
June 28 2021 10:53 JST
 
Komatsu, NTT DOCOMO, Sony Semiconductor Solutions and Nomura Research Institute to Launch "EARTHBRAIN"
April 30 2021 15:35 JST
 
Tokyo Century and DOCOMO to Globally Expand EDGEMATRIX Edge-AI Platform for Video Surveillance & Monitoring
April 13 2021 16:57 JST
 
Sony and NTT DOCOMO Control Driverless "Entertainment Vehicle" in Guam from Japan--Over 2,500km--Via Remote Driver System Deployed on 5G Network
March 22 2021 15:14 JST
 
NTT DOCOMO to Establish a 5G Consortium in Thailand with Leading Partners
February 03 2021 14:26 JST
 
NTT DOCOMO's Ambitious New Eco Targets Validated by Science-Based Targets Initiative
February 02 2021 13:18 JST
 
DOCOMO and AGC Use Metasurface Lens to Enhance Radio Signal Reception Indoors
January 26 2021 15:07 JST
 
Qualcomm and NTT DOCOMO Enable World's First Commercialization of 5G Sub-6 GHz Carrier Aggregation in Japan
December 08 2020 08:01 JST
 
DOCOMO Licenses Lens Production for VR Headset to NTKJ
November 09 2020 15:07 JST
 
More Press release >>

Latest Press Release


More Latest Release >>