Tech companies told staff from the FCC Office of Engineering and Technology a two-millisecond duty cycle provision, previously sought by Intel, Meta Platforms, Qualcomm and others, would limit use of the 60 GHz band. The provision would “effectively foreclose making the 60 GHz band a home for a host of next generation, innovative, low-power technologies,” said a filing by Acconeer, Amazon, Google, Infineon Technologies Americas and Texas Instruments, posted Wednesday in docket 21-264. The “window duration over which duty cycle is measured affects the variety of chirp patterns that can be used by low-power frequency-modulated continuous-wave radars in the 60 GHz band,” the companies said.

Gogo already showed "the extremely negligible possibility of harmful interference" from granting its requested waiver of effective radiated power limits for air-to-ground operations in the 849-851 MHz and 894-896 MHz bands, it emailed us Tuesday in response to APCO concerns (see 2206070067). It said the FCC record shows its ongoing efforts to work with public safety interests on their notification and mitigation concerns, and it "was surprised by APCO’s first filing so late in the proceeding. Gogo has been a good neighbor to public safety for decades without interference, and this will continue to be a priority," it said.

The Wi-Fi Alliance urged the FCC to ignore requests to go slow and start approving automated frequency control operators for the 6 GHz band. “As recent ex parte letters to the Commission reveal, parties that have unsuccessfully challenged expanded use of the 6 GHz band in the past have not relented,” the alliance said in a filing posted Tuesday in docket 21-352: “Now, they wish to slow or stop even the grant of conditional authorizations to further test AFC systems. The Commission must reject these groundless efforts and allow the AFC authorization process to proceed.”

The FCC needs to be sure Gogo Business Aviation's requested waiver of effective radiated power limits for air-to-ground operations in the 849-851 MHz and 894-896 MHz bands (see 2107070042) isn't an interference risk to public safety incumbents, APCO said Tuesday in docket 21-282. The agency should require Gogo to do field testing before full operations are authorized, perform its own analysis of the interference potential, and require conditions to mitigate and resolve interference, it said. Rather than just emailing public safety licensees at least 10 days before the new operations, it should have to email and call, notifying relevant 800 MHz regional planning committees and FCC-certified public safety frequency coordinators, it said. APCO also said Gogo transmissions should include a signal identifier. It said Gogo's request would be better handled through a rulemaking proceeding than a waiver. Gogo didn't comment.

The FCC sought comment Tuesday on a December waiver request by proponents of cellular-vehicle-to-everything use of the 5.9 GHz band asking to be able to deploy as soon as possible (see 2112140070). Comment deadlines are to come in a Federal Register notice. The FCC has been under continuing pressure to act on the waiver request (see 2206020050), which was filed by Audi of America, Ford, Jaguar Land Rover, the departments of transportation in Utah and Virginia, Aaeon Technology, Harman International Industries, Panasonic North America and other companies. A second notice Tuesday reminded part 90 intelligent transportation system licensees operating in the band that they must cease operations in the 5850-5895 MHz portion of the band July 5. Both notices were by the Public Safety and Wireless bureaus.

The Competitive Carriers Association urged the FCC to take into account issues faced by smaller carriers if it acts on a proposal by Commissioner Brendan Carr that wireless carriers be required to participate in the now voluntary wireless network resiliency cooperative framework (see 2205160067). “CCA members have been highly proactive in hardening their networks, implementing policies, and deploying resources that will help withstand natural disasters and emergency situations,” said a filing posted Tuesday in docket 21-346: “If the FCC must move forward, CCA encourages the FCC to build in significant flexibility for rural and smaller carriers to reflect their challenges, limited resources, and on the ground realities.”

ATIS Tuesday released a 5G supply chain standard, designed, it said, to make networks more secure. The standard “addresses the 5G supply chain (5G/SC) as a critical function in the design, build, deployment, and operation of 5G assured networks,” the document says. “Securing the 5G information and communications technology supply chain is critical as 5G capabilities expand rapidly in North America,” said ATIS President Susan Miller: Following a request by DOD, “ATIS has brought together leading industry and government partners to develop this standard. We are confident in the standard’s ability to deliver the multiple levels of assurance needed to secure the 5G supply chain.”

Information collection requirements tied to revised rules for wireless emergency alerts, approved by FCC commissioners last year (see 2106170063), went into effect Monday, said a Federal Register notice that day.

With the FCC’s inaugural broadband data collection approaching, CTIA suggested best practices for mapping in-vehicle mobile broadband coverage, in a filing posted Monday in docket 19-195. “Because the Commission has not sought comment on the adoption of standard parameters, despite CTIA’s request to do so, CTIA recommends that providers use two parameters in their in-vehicle coverage maps: one for in-vehicle attenuation … and one for vehicle speed,” CTIA said: “Including these parameters in propagation models and link budgets will help ensure that in-vehicle maps are consistent across providers. The Commission can encourage broad use of these parameters, either by establishing safe harbors for providers who use them or by issuing guidance recommending” them.

The updated RKF Engineering Solutions study on opening the 12 GHz band for 5G (see 2205200038) "tinkers at the margins .... yet perpetuates most of the flaws of its original report" and introduces new ones aimed at masking interference issues, SpaceX said Monday in docket 20-443. Problems include modeling a terrestrial deployment covering only 10% of the population in each license area and assuming the entire 10.7-12.7 GHz band is available for SpaceX downlinks. It said there's no reason to think any of the parameters in RKF's modeling reflect the mobile service the FCC has been asked to create in the band. SpaceX hasn't submitted any engineering declaration on engineering studies that show higher-power terrestrial operations in the 12 Ghz band can coexist with non-geostationary orbit operations there, Dish Network said. It said SpaceX is seemingly ignoring likely problems with its own proposed second-generation constellation while it raises red flags about the 12 GHz band.