DOCOMO, NTT, NEC and Fujitsu Develop Top-level Sub-terahertz 6G Device Capable of Ultra-high-speed 100 Gbps Transmission

NTT DOCOMO, INC., NTT Corporation, NEC Corporation and Fujitsu Limited jointly announced today the development of a top-level (1) wireless device capable of ultra-high-speed 100 Gbps transmissions in the 100 GHz and 300 GHz sub-terahertz bands.

The four companies have been jointly conducting R&D on sub-terahertz devices since 2021 in anticipation of the coming 6G era. To date, tests of a jointly developed wireless device have achieved ultra-high-speed 100 Gbps transmissions in the 100 GHz and 300 GHz bands at distances of up to 100 meters.(2) By comparison, 100 Gbps is approximately 20 times faster than the maximum 4.9 Gbps (3) data rate of current 5G networks.

Verification test in the 100 GHz and 300 GHz bands

The roles and achievements of the four participating companies are described below.

DOCOMO

After analyzing the wireless system configuration and performance required for 100 GHz telecommunications applications, DOCOMO developed wireless transmission equipment capable of transmitting data rates equivalent to 100 Gbps at a distance of 100 meters.

NTT

Based on research into 300 GHz wireless devices and related equipment such as wideband mixers, NTT developed a top-level wireless device capable of transmitting 100 Gbps per channel at a distance of 100 meters in the 300 GHz band.(1)

NEC

After analyzing a wireless system configuration for telecommunications in the 100 GHz band, NEC developed a multi-element active phased array antenna (APAA) (1) consisting of more than 100 antenna elements.

Fujitsu

After researching compound semiconductor technologies that enable high-output, high-efficiency signal amplification to extend communication range and reduce power consumption in the 100 GHz and 300 GHz bands, Fujitsu achieved the world's highest power efficiency (4) in a high-output amplifier.

In the 6G era, when wireless networks are envisioned supporting diverse applications ranging from ultra-HD video streaming to real-time control in autonomous vehicles, as well as increasing communication demands, high-capacity wireless communication is expected to be achieved by exploiting the abundant bandwidth available in the sub-terahertz band from 100 GHz to 300 GHz. However, compared to 28 GHz and other millimeter bands used in current 5G systems, the much higher frequencies of the sub-terahertz band will require entirely different wireless devices that are now being developed from scratch. To be successful, this effort will need to overcome several key challenges, such as determining the specific performance requirements of wireless devices operating in the sub-terahertz band, and then actually developing such devices.

Going forward, the four companies will continue to conduct extensive R&D into sub-terahertz telecommunications, leveraging each company's strengths in various initiatives to contribute to 6G standardization.

Note: The research and development mentioned herein includes results from the Research and Development for Expansion of Radio Wave Resources project conducted on behalf of the Ministry of Internal Affairs and Communications.
[1] This assumes that as of March 2024, no other entity has announced 1) achievement of 100 Gbps transmission over a distance of 100 meters in the 100 GHz band (according to NEC); 2) achievement of 100 Gbps transmission over a distance of 100 meters in the 300 GHz band (according to NTT); and 3) achievement of an equivalent isotropic radiation power (EIRP) of 50 dBm and a beam steering angle of approximately ±30 degrees using 100 or more APAA elements in the 100 GHz band (according to NEC).
[2] The transmitter and receiver are facing each other in a straight line with no obstacle between them.
[3] Maximum values specified in technical standards, but not representing the actual data rate, provided on a best-effort basis. Actual data rates may vary depending on the communication environment and network congestion.
[4] World's highest efficiency under specific high-power conditions in the 100 GHz and 300 GHz bands, respectively, according to Fujitsu as of March 2024.About NTT DOCOMO

NTT DOCOMO, Japan's leading mobile operator with over 89 million subscriptions, is one of the world's foremost contributors to 3G, 4G and 5G mobile network technologies. Beyond core communications services, DOCOMO is challenging new frontiers in collaboration with a growing number of entities ("+d" partners), creating exciting and convenient value-added services that change the way people live and work. Under a medium-term plan toward 2020 and beyond, DOCOMO is pioneering a leading-edge 5G network to facilitate innovative services that will amaze and inspire customers beyond their expectations.https://www.docomo.ne.jp/english/

About NTT

NTT contributes to a sustainable society through the power of innovation. We are a leading global technology company providing services to consumers and business as a mobile operator, infrastructure, networks, applications, and consulting provider. Our offerings include digital business consulting, managed application services, workplace and cloud solutions, data center and edge computing, all supported by our deep global industry expertise. We are over $97B in revenue and 330,000 employees, with $3.6B in annual R&D investments. Our operations span across 80+ countries and regions, allowing us to serve clients in over 190 of them. We serve over 75% of Fortune Global 100 companies, thousands of other enterprise and government clients and millions of consumers.

About NEC Corporation

NEC Corporation has established itself as a leader in the integration of IT and network technologies while promoting the brand statement of “Orchestrating a brighter world.” NEC enables businesses and communities to adapt to rapid changes taking place in both society and the market as it provides for the social values of safety, security, fairness and efficiency to promote a more sustainable world where everyone has the chance to reach their full potential. For more information, visit NEC at https://www.nec.com.

About Fujitsu

Fujitsu’s purpose is to make the world more sustainable by building trust in society through innovation. As the digital transformation partner of choice for customers in over 100 countries, our 124,000 employees work to resolve some of the greatest challenges facing humanity. Our range of services and solutions draw on five key technologies: Computing, Networks, AI, Data & Security, and Converging Technologies, which we bring together to deliver sustainability transformation. Fujitsu Limited (TSE:6702) reported consolidated revenues of 3.7 trillion yen (US$28 billion) for the fiscal year ended March 31, 2023 and remains the top digital services company in Japan by market share. Find out more: www.fujitsu.com.

Press Contacts:

NTT DOCOMO
RF Technology Group6G Network Innovation Department
E-mail: 6gdevice@ml.nttdocomo.com

NTT Corporation
Science and Core Technology Laboratory Group
Public Relations
E-mail: nttrd-pr@ml.ntt.com

NEC Corporate Communications
E-mail: press@news.jp.nec.com

Fujitsu Limited
Public and Investor Relations Division
Inquiries