Several changes are likely to be included in the 37 GHz order and Further NPRM set for a commission vote Monday, industry and FCC officials said. Limited changes are possible to the proposed robocall NPRM, which seeks to close a gap in the commission’s Stir/Shaken authentication rules. Both items are expected to be approved by a unanimous vote.
Federated Wireless urged the FCC to consider the success of spectrum sharing in the citizens broadband radio access service and 6 GHz as it moves forward on the 4.9 GHz public safety band. The CBRS spectrum access system (SAS) and 6 GHz automated frequency coordination (AFC) system “enable widespread commercial access to spectrum while protecting existing and evolving incumbent use,” said a filing posted Monday in docket 07-100. As the FCC considers “the requirements and responsibilities” of the 4.9 GHz band manager, it should consider leveraging “proven spectrum management tools and capabilities” such as the SAS and AFC “to ensure efficient and intense utilization of the 4.9 GHz Band in support of public safety missions nationwide,” said Federated, whose representatives met with staff from the Wireless and Public Safety bureaus.
Spectrum sharing is taking off as a concept in nations around the world, speakers said during the Middle East and North Africa (MENA) Spectrum Management Conference, which streamed from Bahrain on Thursday. Sharing technologies is becoming more dynamic as the need for access to spectrum grows, speakers said.
The citizens broadband radio service (CBRS) band uses technology that's “simplistic” and “at this point …obsolete,” so it shouldn’t be considered the best model for sharing, Rysavy Research President Peter Rysavy said. Rysavy spoke as part of an American Enterprise Institute series on spectrum, posted Monday. He also argued that 7/8 GHz spectrum should be allocated for full-power licensed use. CBRS hasn't been very widely used because “it involves coordination between incumbents and secondary users,” and “there’s a very complicated environmental sensing capability that secondary users must rely on to detect” DOD operations.
DOD has floated a compromise to the wireless industry that vacates military-controlled bands to 420 MHz available for FCC auction while maintaining its grip on the 3.1-3.45 GHz band, the main battleground in Capitol Hill’s protracted talks on a compromise airwaves legislative package. DOD’s proposal, first reported by Punchbowl News, circulated as the Senate prepared to move on an amended version of the House-passed budget resolution (H. Con. Res. 14), which will provide a blueprint for a coming reconciliation package that Republicans hope to use to move spectrum legislation (see 2501290057).
A representative of the Open Technology Institute at New America warned an aide to FCC Chairman Brendan Carr against higher power limits and lower out-of-band emissions (OOBE) levels in the citizens broadband radio service band (see 2503130049), said a filing posted Wednesday. “With more than 400,000 base stations deployed by more than 1,000 operators for a wide variety of use cases, it would be fatally disruptive to accede to the demands of a small subset of users to raise power to a level that will inevitably increase interference and reduce channel availability for most other users, especially [general authorized access] users who have just recently built out the vast majority of [CBRS deployments] in reliance on the Commission’s rules,” Michael Calabrese said in the filing in docket 17-258. That is especially true for rural and small communities where hundreds of wireless ISPs “have relied on the Commission’s CBRS rules to invest in equipment sold by [original equipment manufacturers] such as Cambium Networks and Tarana Wireless to offer more affordable fixed wireless broadband services.”
Samsung Electronics America and Ericsson jointly disputed a recent FCC filing by NCTA raising concerns about citizens broadband radio service interference, including by dual-band radios that operate across CBRS and the C band (see 2503060016). Both companies have waiver requests for multiband radios before the regulator. “NCTA’s continuing efforts to put off FCC action on these waivers only serves to delay the public interest benefits the multiband radios will provide: an innovative, efficient, and cost-effective base station that is smaller and has more functionality than separate CBRS and C-band radios,” said a filing posted Friday in docket 23-93. “Multiband radios will support faster deployment through fewer site approvals, lower installation costs, smaller form factor, and more energy efficiency.”
EchoStar disagreed sharply with a recent NCTA study that raised concerns about proposals to relax in-band emissions limits in the citizens broadband radio service band (see 2503060016). Other technical studies “disprove NCTA’s arguments that there is a binary choice between high power use and protecting [general authorized access users], sharing, and incumbents,” said a filing posted Tuesday in docket 17-258. EchoStar’s studies show that power levels and “updating the in-band and out-of-band emission limits will increase spectrum utility without harming federal or commercial incumbents,” EchoStar said, recapping its meeting with an aide to FCC Commissioner Geoffrey Starks.
Verizon representatives met with FCC Wireless Bureau staff to discuss the spectral dynamics of the citizens broadband radio service band. While higher allowed equivalent isotropically radiated power (EIRP) levels create “larger cells, which offer more coverage area, propagation losses are identical, regardless of power level,” said a filing posted Monday in docket 17-258. “The propagation ‘slope’ dictates the ratio of cell edge (cell size area) to interfered area. … This ratio (interference area/cell area) is the same regardless of cell size or allowed EIRP.”
Advocates of keeping most of the current rules for the citizens broadband radio service (CBRS) band intact have been playing defense since the start of President Donald Trump's administration and the ascension of Brendan Carr to chairman of the FCC. Carr has said little in recent weeks but went on record in the past urging an examination of higher power levels, which some view as a threat to growing use of the band.