The Federal Communications Commission (FCC) has taken a major step toward unlocking new wireless opportunities in the United States by proposing rules for the Upper C-band (3.98-4.2 GHz), paving the way for 5G and 6G services.
The proposed spectrum auction aims to prevent conflicts with aviation systems while accelerating broadband deployment. Here are the 10 key points from the announcement:
Upper C-Band Spectrum Opening
The FCC voted 3-0 to propose rules for the Upper C-band, targeting 3.98-4.2 GHz frequencies to support emerging 5G and future 6G technologies.
Potential Auction of 180 Megahertz
The proceeding could auction up to 180 megahertz, maximizing available spectrum for next-generation wireless services as aviation safety upgrades are implemented in adjacent bands.
Compliance with One Big Beautiful Bill Act
The legislation mandates competitive bidding for at least 100 megahertz in the Upper C-band by July 2027, and the FCC is moving to meet this deadline.
Leveraging Previous C-Band Auction Success
The FCC plans to apply the framework used in the 2020 lower C-band auction (3.7-3.98 GHz), which allocated 280 megahertz for flexible wireless use and expanded 5G access nationwide.
Support for Satellite and Incumbent Users
The Notice of Proposed Rulemaking seeks public comments on accommodating existing satellite operators and other services in the Upper C-band.
Airline Safety and Radio Altimeters
The FCC is coordinating with the FAA to ensure adjacent band radio altimeters, which are crucial for aircraft landings, can coexist safely with new 5G and 6G services.
Use of Auction Proceeds to Assist Airlines
The FCC is exploring whether a portion of the auction proceeds can support airlines in replacing or upgrading altimeters to prevent interference.
Resolution of Past 5G Interference Concerns
Previous 5G rollouts in 2022 caused temporary flight disruptions due to altimeter interference fears, resolved through voluntary agreements with carriers like Verizon and AT&T.
Advancing Affordable Broadband and Emerging Technologies
FCC Chair Brendan Carr emphasized that the auction will drive innovation in next-generation wireless services while supporting affordable broadband expansion for communities nationwide.
Preparations for Generational Upgrades
The FAA is expected to adopt new radio altimeter standards prior to the auction, ensuring that 5G and future 6G services can operate without disrupting aviation safety.
The FCC’s proposed Upper C-band auction represents a major step in balancing technological advancement with public safety, opening the door for enhanced connectivity, faster networks, and the early rollout of 6G innovations in the United States.
GSMA today said commercial 6G rollouts are likely to begin in China, Japan, South Korea, the US, the GCC states, Europe, Vietnam and India. By 2040, 6G connections could surpass 5 billion, or about half of all global mobile connections.
Baburajan Kizhakedath
