SoftBank Corp. is making a significant move in the race towards 6G by teaming up with Nokia for an outdoor trial scheduled for June 2025 that will explore the potential of the 7 GHz band—a centimeter-wave frequency gaining traction in discussions about next-generation mobile technology. This marks a groundbreaking first for a telecommunications carrier in Japan and positions SoftBank as a pioneer in this important field.
In a bid to assess the viability of urban 6G deployment, SoftBank plans to install three pre-commercial base stations in central Tokyo, utilizing cutting-edge massive multiple input, multiple output (MIMO) technology. The objective? To achieve coverage that rivals the impressive standards set by 5G.
This trial will focus on comparing the radio characteristics and coverage of the 7 GHz band against the established 5G sub-6 band, particularly the 3.9 GHz spectrum. By strategically placing the new 7 GHz base stations alongside existing 5G installations atop city rooftops, SoftBank aims to gather comprehensive data. Upcoming tests will encompass both indoor and outdoor measurements, further fueling the research and development necessary for the commercialization of 6G technology.
Centimeter waves—radio waves with wavelengths between 1 to 10 cm—are part of a spectrum that includes frequencies from 3 to 30 GHz. The 7–24 GHz band, known as FR3 according to 3GPP standards, is emerging as a frontrunner for future mobile networks. SoftBank’s experiment targets the 7,125 to 8,400 MHz range, which is poised for dialogue at the ITU-R’s World Radiocommunication Conference 2027 (WRC-27) as a potential frequency for 6G, stirring global interest in the process.
The 7 GHz band promises a much wider bandwidth compared to the existing 5G sub-6 GHz offerings. Coupling it with the current 5G band of 6,425–7,125 MHz (band n104) opens up nearly 2 GHz of contiguous spectrum, delivering the characteristics necessary for speedy and reliable communication. With mobile data traffic continuously on the rise—partly fueled by the explosion of artificial intelligence (AI)—this trial represents a crucial step in shaping the landscape of future connectivity.
What is the main goal of SoftBank’s trial with Nokia?
The primary aim is to test the 7 GHz band for its potential as a future 6G frequency and compare its coverage and characteristics with those of existing 5G technology.
Why is the 7 GHz band considered important?
It offers significantly wider bandwidth than 5G’s sub-6 GHz frequencies, and its propagation characteristics make it suitable for high-speed communication, making it an enticing candidate for next-gen mobile networks.
How does this trial contribute to the future of mobile communication?
As mobile data demands grow, particularly due to advancements in AI, this trial lays vital groundwork for developing and eventually commercializing 6G technology, ensuring future connectivity keeps pace with demand.
