|
| Friday, 29 January 2021, 02:00 HKT/SGT | |
| |  | |
Source: NTT DOCOMO | |
|
|
|
|
| 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.
Topic: Production report
Source: NTT DOCOMO
Sectors: Telecoms, 5G, Wireless, Apps
http://www.acnnewswire.com
From the Asia Corporate News Network
Copyright © 2025 ACN Newswire. All rights reserved. A division of Asia Corporate News Network.
|
|
|
|
|
|
|
| NTT DOCOMO |
| Mar 31, 2025 14:43 HKT/SGT |
|
Five NTT Group Companies and Biome Inc. Start Joint Development of Large-scale Estimation Technology for Vegetation and Organisms using Satellite Image Data |
| Mar 25, 2025 15:40 HKT/SGT |
|
NTT, DOCOMO and NEC Demonstrate World's Fastest 140 Gbps Bidirectional Wireless Transmission in 80 GHz Band |
| Mar 7, 2025 15:24 HKT/SGT |
|
Japan's Telecommunications Carriers Enhance Disaster Response with On-site Training for Joint Use of Marine Vessels |
| Mar 3, 2025 19:25 HKT/SGT |
|
NTT and DOCOMO Successfully Demonstrates On-Demand Unified Control of Computing Services Through Network and Service Integration |
| Mar 3, 2025 19:14 HKT/SGT |
|
Space Compass and NTT DOCOMO Successfully Demonstrate Data Connectivity to 4G Devices via HAPS at 20 km Above Kenya |
| Mar 3, 2025 17:32 HKT/SGT |
|
TOPPAN and DOCOMO Agree to Innovate Next-Generation 6G Services Using FEEL TECH Communication Technology |
| Jan 28, 2025 16:39 HKT/SGT |
|
Japan's Telecommunications Carriers Strengthen Disaster Response by Conducting Joint Training for Shared Refueling Stations |
| Jan 24, 2025 16:39 HKT/SGT |
|
DOCOMO to Exhibit at MWC Barcelona 2025, World's Largest Connectivity Exhibition |
| Dec 19, 2024 15:50 HKT/SGT |
|
6G Begins! Embarking on a New Journey of Global Interoperable Standards |
| Dec 18, 2024 15:11 HKT/SGT |
|
Japan's Telecommunications Carriers Join Forces to Strengthen Disaster Response |
| More news >> |
 |
|
|
|
