Docomo successfully conducts 5G trials in actual-use environments


NTT Docomo says a 5G trial it conducted with Nokia Networks at the Roppongi Hills high-rise complex in Tokyo on Oct 13 achieved ultra-high-speed data transmission in excess of 2Gbps. The trial used millimeter-wavelength signals with an extremely high frequency of 70GHz, a key development for the eventual commercial use of 5G wireless technology in actual-use environments.

To date, no test had achieved a 5G data transmission in a commercial complex, such as a shopping mall, due to problems with base stations being out of line of sight and diffused reflections causing the attenuation of highly directional millimeter signals. This time, however, the trial was successful thanks to the use of two new technologies: beamforming, which focuses radio waves in a specific direction, and beam tracking to control beam direction according to the mobile device's location.

Also, in a separate trial that Docomo conducted with Samsung Electronics in Suwon, South Korea, on Nov 12, a maximum data-receiving speed of more than 2.5Gbps was achieved in a vehicle travelling with a speed of 60km/h. The trial used a 28GHz high-frequency signal in combination with beamforming with a high number of antenna elements and beam tracking.

Other trials conducted recently by Docomo in collaboration with vendors include: Docomo and Ericsson verified the feasibility of massive multiple-input multiple-output (MIMO) technology by achieving a real-time data-receiving speed of more than 10Gbps using Ericsson 5G radio prototypes with a 15GHz frequency band on Nov 19.

Docomo and Fujitsu confirmed a multi-base-station cooperative transmission system by achieving a data-receiving speed of over 11Gbps in total of four mobile devices with a 4.6GHz signal on Oct 26.

An outdoor data transmission trial conducted by Docomo, Docomo Beijing Communications Laboratories and Huawei Technologies achieved on Nov 18 a multi-user MIMO (MU-MIMO) transmission of 43.9bps/Hz/cell, which was 3.6-times more efficient than past outdoor trials of LTE-Advanced based MU-MIMO technology.

Docomo said it has been collaborating directly with a number of world-leading vendors in trials and development of 5G mobile communication technologies since May 2014.

© Japan Today

©2024 GPlusMedia Inc.

Login to comment

The only thing they forgot to mention within this article of scientific mumbo jumbo was what it'll actually do for us.

1 ( +1 / -0 )

It'll provide faster than broadband speeds while on the road or just as home.

1 ( +1 / -0 )

I will be just as happy not to renew any more 2 year contracts and have DOCOMO come into the NEW YEAR of 2016 not Pre Mobil Dinosaur era. Time to join the world and get rid of 2 yr mandatory contracts.

0 ( +1 / -1 )

Go to and you can find DOCOMO reseller deails and your 2yr contracts will be a thing of the past. You provide your own phone though!

0 ( +0 / -0 )

what's the hurry, really?

0 ( +0 / -0 )

I do not own a phone. Why am I reading this then?

-3 ( +0 / -3 )

According to Nokia's website, 5G is not for mere mortals, but for machines. So your toaster can talk to your refrigerator, and that chip they implanted all those yours ago will finally be put to use by reporting your medical condition to the hospital and making a reservation at the crematorium at the same time. Maybe best to avoid Roppongi Hills and retreat to Shikoku - they're unlikely to get the technology there for another 50 years or so.

(Sorry, it's Monday and I've run out of medication.)

0 ( +0 / -0 )

Login to leave a comment

Facebook users

Use your Facebook account to login or register with JapanToday. By doing so, you will also receive an email inviting you to receive our news alerts.

Facebook Connect

Login with your JapanToday account

User registration

Articles, Offers & Useful Resources

A mix of what's trending on our other sites