NCTA officials and members spoke with aides to all five FCC commissioners about Samsung Electronics America’s request for a waiver for a 5G base station radio that works across citizens broadband radio service and C-band spectrum (see 2309130041). Cable companies objected earlier (see [Ref:2401050052). Technical analysis demonstrates that Samsung’s multiband radio “and others sure to follow based on its theory would increase the median noise in the CBRS band by roughly 11 dB, harming the services existing CBRS users are providing to consumers,” said a filing posted Tuesday in docket 23-98. Approval of the waiver “would set a troubling precedent by allowing future parties to disregard emissions limits and other protections, undermining the Commission’s ability to manage interference.” Among those represented on the calls were Comcast, Charter Communications and Cox Enterprises.
Commenters disagreed sharply on what mechanisms the FCC should use to make available unassigned licenses in its inventory absent general auction authority. Comments were posted Tuesday in docket 24-72. The FCC sought comment in March on the first anniversary of the expiration of its general auction authority (see 2403070062). Wireless carriers said grants of special temporary authority (STA) are the best alternative. Unlicensed advocates hailed the benefits of dynamic spectrum sharing.
Top DOD officials stressed the continuing military importance of the lower 3 GHz band as DOD and NTIA kick off a study of the band that the national spectrum strategy requires (see 2403120056). DOD and other administration officials during a Monday event at CTIA stressed the importance of developing more sophisticated ways of sharing spectrum. The National Spectrum Consortium also sponsored the event.
DOD on Wednesday released a redacted version of the Emerging Mid-Band Radar Spectrum Sharing Feasibility Assessment (EMBRSS), which DOD and NTIA forwarded to Congress in September (see 2309280087). The report examines military systems located in lower 3 GHz spectrum, with an eye on potential sharing but not on clearing as sought by CTIA and carriers.
Samsung Electronics America and others refuted objections NCTA raised against Samsung's request for an FCC waiver for a 5G base station radio that works across citizens broadband radio service and C-band spectrum (see [Ref:2309130041). “Samsung’s proposed 3.5/3.7 GHz multiband radio will have substantially the same radiofrequency profile as a standalone 3.7 GHz radio collocated with a standalone 3.5 GHz radio” with no “practical impact” on CBRS deployments “when compared to the deployment of two standalone radios,” said a filing posted Monday in docket 23-93. Ericsson, Qualcomm and Verizon also signed the filing. NCTA opposition “in the face of measured test data demonstrates this is best understood as a collateral attack on the Commission’s rule limiting the out-of-band emissions from 3.7 GHz base stations into the CBRS band,” they said. The general objection to a current FCC rule should be dismissed as “irrelevant and improper to this waiver proceeding, especially because Samsung is not seeking a waiver of the 3.7 GHz OOBE limits.”
CTIA is hopeful a legislative vehicle will be found soon that will restore general FCC auction authority, more than a year after it lapsed, CTIA Senior Vice President-Spectrum Umair Javed said Wednesday during a Georgetown Center for Business and Public Policy webcast. “It sort of feels like there’s a lot of smoke, and maybe not fire yet,” Javed said. He hopes a bill floated by Sen. Ted Cruz, R-Texas, will provide the needed “spark.”
Policymakers shouldn’t forget the potential of very high frequency spectrum, the mmWave Coalition said last week in response to the National Science Foundation’s request for information (RFI) on the national spectrum research and development plan, which is part of the national spectrum strategy. The comments have yet to be posted by NSF. Most 5G and 6G discussions so far are focused on lower frequencies, the coalition said. “A key reason for this is that it is hard to justify a business case for sub-THZ mobile spectrum use at present as there are now basic technical questions, technological hurdles, and cost issues, yet these are fertile and active areas of research which may eventually lead to compelling opportunities for mobile use in this spectrum,” the group said. The coalition cited a growing need for wireless backhaul, “especially in rural, underserved areas often where fixed wireless access is vital for rural households, and often backhaul requirements cannot always be implemented in fiber technology, due to installation urgency requirements, local terrain features that delay or block installation, cost, or short term requirements that make fiber optic installation uneconomical.” The Dynamic Spectrum Alliance said the RFI is on target in the areas it suggests for research. “Efficiency, dynamic spectrum access and management, automated interference mitigation, and coexistence modeling are all areas in which the DSA and our members have keen interest and extensive experience,” the alliance said: “We also fully support efforts to study the economic-, market-, social-, and human-centric aspects of increasing spectrum access.” DSA called on the NSF to take into account innovative licensing frameworks that are already working, including the citizens broadband radio service band and 6 GHz. “Given the historical success of the variety of spectrum sharing techniques in different bands designed to protect different incumbents … there is no one size fits all solution to spectrum sharing,” DSA said. AT&T urged the administration to more clearly define the term dynamic spectrum sharing. The definition should include an “examination of full-power licensed use” and “development of a basis for predictable times and/or geographies in which dynamically shared spectrum can be used,” AT&T said. The carrier urged more work on interference mitigation techniques and not restricting research to “mere ‘on/off’ spectrum access controls.” The definition should seek “to define co-channel and adjacent channel interference environments to incorporate into network design and operation.”
NTIA is facing increasing pressure from carriers for additional spectrum for full-power licensed use, and from interests favoring a more open-ended approach, especially in the lower 3 GHz and 7/8 GHz bands, as the agency finalizes an implementation plan for the national spectrum strategy, due for release March 14. DOD is defending its systems in the bands targeted by carriers. Meanwhile, there are questions about how much longer Scott Harris, NTIA senior spectrum adviser, will remain at the agency after the implementation plan is released, industry officials told us.
Seventeen cable companies and other Wi-Fi advocates, spectrum sharing advocates, and defense and aeronautics companies Monday released a letter sent to NTIA about implementation of the national spectrum strategy. It warned against “anti-competitive efforts, modeled after China’s goals, to clear the 3 GHz and 7 GHz bands for exclusive licensing to a small handful of legacy carriers.” NTIA is set to release the plan March 14 (see 2402090059). “The decisions made … will directly affect the nation’s ability to maintain and promote our global competitiveness, national security, and national security technology leadership with our allies,” the letter said: “We urge the NTIA to adopt an Implementation Plan that is aggressive in expanding the pie for a wide variety of public, commercial, and national security uses.” The plan should focus on “accelerating the development and adoption” of spectrum sharing technologies and coexistence frameworks, the letter said. It noted the success of sharing in the 6 GHz band and the citizens broadband radio service band. Signers included the American Library Association, Charter Communications, Comcast, Cox Communications, the Dynamic Spectrum Alliance, Federated Wireless, Deere & Company, Lockheed Martin, NCTA, the Open Technology Institute, Public Knowledge, Midcontinent Communications, the Schools, Health & Libraries Broadband Coalition, Spectrum for the Future, WifiForward and the Wireless ISP Association.
The Information Technology and Innovation Foundation called on regulators to rethink their spectrum sharing approach, refocusing on a top tier providing licenses for full-power use of a band, with reliable access at all times. “The dichotomy between dynamic spectrum sharing and exclusive licensing is a false one,” ITIF said in a report released Monday: “Reliable, full-power access is possible within a dynamic sharing framework if the FCC auctions super-priority rights to commercial users.” ITIF cited the model provided by the citizens broadband radio service band, which offered three tiers, with priority access licenses (PALs) sold in an FCC auction, with lesser rights than the incumbent Navy systems the rules are designed to protect. “We should not confuse the particulars of that band with the principles of the dynamic sharing system,” the report said. “In a band with significantly fewer incumbency interests, rights amenable to proponents of exclusive, shared, and unlicensed spectrum can coexist within a dynamic sharing system with only a minor alteration: Instead of just protecting incumbents and auctioning PALs that are secondary to the incumbents’ rights, the FCC should also auction licenses for the same type of rights the Navy has in the CBRS band.” ITIF noted widespread industry criticism of how CBRS works. Part of the reason “for decrying CBRS is that it should hardly qualify as ‘sharing’ when the federal incumbent retains the right to do whatever it wants whenever and wherever it wants,” the report said. ITIF noted there have been no reports of Navy systems suffering harmful interference since CBRS was launched. “Any party that thinks the Navy has reliable, full-power access in the current CBRS band should leap at the opportunity to get the same deal in another band,” ITIF said.