Four major US wireless carriers have recently made voluntary commitments to address aviation safety concerns and allow full use of the C-Band wireless spectrum for 5G use. Verizon, AT&T, T-Mobile US, and UScellular submitted a letter to the Federal Communications Commissions (FCC) outlining their voluntary commitments to support full-power deployments across C-Band while minimizing the operational impact on their C-Band operations.
The FAA had previously expressed concerns that 5G service could interfere with airplane altimeters, which provide critical data on a plane’s height above the ground and are essential for safe landing during bad weather. This had led to brief disruptions at some US airports last year, prompting the voluntary commitments by the wireless carriers.
Verizon and AT&T had already agreed to delay some C-Band 5G usage until July last year, while T-Mobile and UScellular had not begun deployment at the time of the agreement. The latest voluntary commitments are seen as a major step forward and will allow carriers to increase power levels to get to full C-Band use.
The voluntary commitments made by the wireless carriers could last until 2028, according to sources briefed on the matter. The FAA had initially sought to extend some through up to 2033. The FCC has not yet commented on the matter, while the FAA said it continues to work closely to ensure a safe co-existence in the US 5G C-band environment.