Dynamic Sharing in CBRS Band May Not Translate to Other Bands, FCC Warns

The dynamic sharing framework the FCC adopted for the 3.5 GHz citizens broadband radio service band may not translate elsewhere, said a Friday report to Congress. The FCC responded to instruction in the Spectrum Pipeline Act and earlier took comment on rule changes and on proposals to open 1 GHz of spectrum between 6 GHz and 56 GHz (see 1809120043). Commissioners didn’t vote on the 14-page report, by the Wireless Bureau and Office of Engineering and Technology. Work on the 3.5 GHz band is bearing fruit, the report said. “Intended to protect incumbent uses while encouraging innovative technologies and services," it "has fostered significant investment in the 3.5 GHz band,” the FCC said. “Most comments … coalesced around the adoption of a wait-and see-approach before the Commission decides to apply these techniques elsewhere.” Groups like the WinnForum are looking at similar sharing in other bands, the FCC said. “It is too soon to know whether other bands may be suitable for licensed or unlicensed use based on the techniques used in the 3.5 GHz band.” The 3.5 GHz rule changes were approved 3-1 at the October commissioners' meeting (see 1810230037). The staff report defends the changes. They "set the stage to: (1) promote investment in the band; (2) encourage rapid and robust network deployment; and (3) protect federal and non-federal incumbent users,” the report said. On proposals to reallocate spectrum for broadband above 6 GHz, the regulator “has made spectrum available for unlicensed use of the 64-71 GHz band and licensed fixed and mobile use in the 24 GHz, 28 GHz, 37 GHz, 39 GHz, and 47 GHz bands,” the report said. It notes the 6 GHz NPRM also approved in October (see 1810230038). The document said fixed service operators “heavily” use that band. “More than 27,000 licenses are issued for point-to-point operations” there, it said: “This proceeding has not been finalized and may not ultimately require use of automated frequency control systems throughout the band or involve a full one gigahertz of spectrum."