New America Urges Consideration of LPI Rules for Sharing Federal Spectrum

director of the program, said the group filed its report at the NTIA, at the agency's urging, as part of a multistakeholder review process last month and Monday released a public version. “The potential benefits of different rules for indoor-only use are becoming more evident,” the report said, noting the FCC’s 2020 decision to authorize low-power, indoor (LPI) use across the 6 GHz band. Incumbent licensees already are using the spectrum, including more than 50,000 high-power fixed microwave links, the report said: LPI use is limited “to roughly one-fourth the standard power of Wi-Fi, yet is considered extremely useful since the vast majority of internet data (including at least 80% of mobile device data traffic) is transmitted indoors and over Wi-Fi.” LPI in 6 GHz “highlights the potential to authorize indoor-only use in many other bands where users comply with power, device form factor, database coordination, or other technical requirements necessary to protect the primary licensees from harmful interference,” New America said. While LPI in 6 GHz is authorized under Part 15 of the commission’s rules, “LPI can be adopted as part of a licensed-by-rule framework or licensed exclusively to select categories of facilities (such as factories and schools),” the report said. It notes DOD concerns about sharing the lower 3 GHz band, which the military uses broadly. “Similarly, large portions of the 7 GHz band” are “currently used by sensitive military systems in the United States and in Europe (e.g., NATO operations in 7250–7750 MHz).” New America points to five frequency ranges that may be particularly suitable for LPI use: 3100–3450, 7125–7250, 7250–7750 and 2900–3100 MHZ, and 10–10.5 GHz. Of lower 3 GHz it says that “while a dynamic coordination system should enable DOD to share at least portions of the band for low-power use outdoors … a broader underlay authorization for LPI use should be considered as an option for this band.”