English | 简体中文 | 繁體中文 | 한국어 | 日本語
Monday, 25 January 2021, 17:06 HKT/SGT
Share:
    

Source: NEC Corporation
NEC Millimeter-wave Distributed-MIMO Technique Triples the Number of Simultaneous Connections and Transmission Capacity in a Real Office setting

TOKYO, Jan 25, 2021 - (JCN Newswire) - NEC Corporation (TSE: 6701) announced today it has demonstrated multiple highly stable simultaneous terminal connections and transmission capacity in a real office environment through distributed-MIMO(1) in the 28 GHz millimeter-wave frequency band. This demonstration achieved approximately 3 times the number of simultaneous connections and transmission capacity compared to cases without distributed-MIMO in the 28 GHz frequency band. Moreover, transmission deterioration from obstacles was also reduced.




According to NEC research, this is the first demonstration in the industry to apply a distributed-MIMO system in the millimeter-wave frequency band in an office environment. This is expected to contribute to the construction of highly convenient 5G environments that enable simultaneous multiple connections in the future.

Earlier this year, Japan began to commercially deploy 5G in the sub 6 frequency band and millimeter-wave frequency band, with the expectation of enhancing network performance to support 10 times more capacity than 4G, as well as higher throughput, lower latency, and multiple connections.

However, since the usable frequency band of the sub 6 frequency band is more narrow than in the millimeter-wave frequency band, Massive-MIMO(2) systems have been introduced to expand capacity and increase the number of simultaneously connected terminals. Applying Massive-MIMO techniques to millimeter-wave frequency is considered to be optimal for applications where each terminal requires a high transmission capacity, such as indoor offices or stadium seats with high terminal density.

However, in the millimeter-wave frequency band, challenges to applying Massive-MIMO techniques include difficulty in achieving stable connections and spatial multiplexing due to the characteristics of radio waves, such as short wavelength and large attenuation due to reflection and shielding.

NEC has established itself as a leader in digital beamforming technology and has commercialized Massive-MIMO in the sub 6 frequency band(3). Moreover, NEC has developed digital coordination technology among antenna elements distributed in the millimeter-wave frequency band and conducted verification activities to solve the problems of indoor mobile communications, such as shadowing and diffraction of propagation paths(4).

Against this background, NEC conducted propagation and transmission trials in a real office environment using a distributed-MIMO technique for the Radio Units (RU) of a 28 GHz band base station system, demonstrating simultaneous connections with multiple terminals and increased capacity. Specifically, NEC developed a technology to effectively calibrate phase and amplitude in response to the difficulty in calibrating and coordinating the phase and amplitude between distributed antennas. As a result, NEC achieved approximately 3 times the number of simultaneous connections and transmission capacity when compared to cases where a distributed-MIMO system is not used.

NEC will continue to carry out 5G demonstration experiments for enabling stable and high transmission speeds in environments where stable millimeter-wave communication is difficult due to obstacles and densely arranged terminals, such as offices and stadium seating, aiming to contribute to the development of millimeter-wave mobile access networks and building ecosystems among operators and venders.

Furthermore, NEC will continue its initiatives for creating new social value by providing "NEC Smart Connectivity"(5) for connecting data generated by people and things and reaching beyond conventional thinking in support of network performance.

(1) Distributed-MIMO
An approach to massive MIMO where a large number of antennas are distributed rather than being placed in a single array.
(2) Massive-MIMO
A Multiple Input Multiple Output (MIMO) technique that enables multi radio beams and stabilizes radio propagation paths using a massive number of transceivers.
(3) NEC develops compact and lightweight massive-element active antenna system for 5G communications
https://bit.ly/3sUlpxi
NEC succeeds in simultaneous digital beamforming that supports 28 GHz band for 5G communications
https://bit.ly/2Y8mALk
(4) NEC develops millimeter-wave distributed antenna radio unit improving the channel quality for indoor 5G applications
https://bit.ly/39jUmUx
(5) NEC Smart Connectivity
https://bit.ly/3pknP60

Topic: Press release summary
Source: NEC Corporation

Sectors: Wireless & Mobility
https://www.acnnewswire.com
From the Asia Corporate News Network


Copyright © 2021 ACN Newswire. All rights reserved. A division of Asia Corporate News Network.

 
NEC Corporation Links

http://www.nec.com

https://www.facebook.com/nec.global/

https://twitter.com/NEC_corp

https://www.youtube.com/user/NECglobalOfficial

https://www.linkedin.com/company/nec/

NEC Corporation Releated News
Apr 13, 2021 10:52 HKT/SGT
NEC recognized as a Partner of the Year by Juniper Networks for two consecutive years
Apr 13, 2021 10:00 HKT/SGT
NEC、VリーグにおいてARを活用した新たなスポーツ観戦スタイルの実証実験を実施
Apr 12, 2021 10:00 HKT/SGT
聖マリアンナ医大病院・NECソリューションイノベータなど、AIによる画像解析技術とデジタルサイネージを活用した高い安全性に配慮した自動ドアの実証実験
Apr 9, 2021 10:30 HKT/SGT
NEC、業界初のマイナポータルと連携したAIチャットボットを開発、20以上の地方公共団体に公開
Apr 8, 2021 13:26 HKT/SGT
NEC and Cisco expand strategic partnership to help advance global deployments of 5G IP transport networks
More news >>
Copyright © 2021 ACN Newswire - Asia Corporate News Network
Home | About us | Services | Partners | Events | Login | Contact us | Cookies Policy | Privacy Policy | Disclaimer | Terms of Use | RSS
US: +1 800 291 0906 | Beijing: +86 400 879 3881 | Hong Kong: +852 8192 4922 | Singapore: +65 6653 1210 | Tokyo: +81 3 6859 8575