On November 2, 2022, the FCC's Office of Engineering and Technology (OET) announced that it had conditionally approved 13 Automated Frequency Coordination (AFC) systems designed to enable shared use of the 6 GHz band between licensed and unlicensed devices.
By preventing harmful interference to incumbent licensed microwave links, AFC will make available 1200 MHz of high-value, mid-band spectrum to Wi-Fi 6E devices operating at standard power levels – which, in turn, will deliver to consumers increasingly faster speeds, lower latency, and better coverage.
The consumer popularity of Wi-Fi is both immense and steadily growing. Consequently, existing unlicensed spectrum in the 2.4 GHz and 5 GHz bands long has been subject to overcrowding. More capacity, particularly contiguous swaths able to support wider Wi-Fi channels – and, thus, faster speeds – was needed.
In response, the FCC in April 2020 adopted a Report and Order opening the 6 GHz band to flexible unlicensed use, including Wi-Fi.
A December 28, 2021, post to the FSF Blog reported that the D.C. Circuit largely upheld that agency action in AT&T Services, Inc. v. FCC.
The following day, FSF President Randolph May in a Press Release heralded that decision "because of the way the court broadly viewed the exercise of the Commission's core spectrum management responsibilities" and for "emphasizing the considerable degree of deference to be accorded to the FCC regarding technical spectrum management matters."
Integral to the Commission's conclusion that unlicensed devices can operate at standard power levels in the 6 GHz band both indoors and outdoors without causing harmful interference to incumbent licensed users is the role to be played by the AFC spectrum use coordination system.
(By contrast, the agency determined that indoor-only devices could operate safely at lower power levels without AFC. As a result, such devices are available today in the retail marketplace as well as from broadband Internet service providers.)
By paving the way for testing to begin, OET's conditional approval of 13 AFC database systems represents a noteworthy step forward in wireless networking – not only Wi-Fi 6E, but also Wi-Fi 7, the under-development successor specification recently demonstrated for Commissioners and agency staff by Intel Corporation and Broadcom Inc.
As those companies described in a slide deck filed in ET Docket 18-295 and GN Docket No. 17-183, Wi-Fi 7 expands network capacity by a factor of 5, latency by up to a factor of 100, and further improves coverage.
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