Publications

The IIC is a mechanism for more reliably informing “new entrants” in a shared spectrum band when incumbent federal systems are operating in close proximity and thus need to be protected.  New entrant access to the spectrum would be controlled through an enhanced, near-real-time Spectrum Coordination System (SCS).  The IIC could replace extra layers of sharing techniques such as the environmental sensing capability (ESC), which presently is required by the Federal Communications Commission (FCC) for the Citizen Broadband Radio Service (CBRS) in the 3550-3700 MHz band.   

This technical memorandum provides the results of a compatibility assessment between terrestrial GPS L1 coarse/acquisition (C/A) code receivers operating in the 1559-1610 MHz RNSS band and terrestrial operations in the 1526-1536 MHz, 1627.5 1637.5 MHz, and 1646.5-1656.5 MHz bands. The Interdepartment Radio Advisory Committee (IRAC) Technical Focus Group (TFG) assessed compatibility between different categories of GPS L1 C/A code receivers and the proposed terrestrial deployment by examining the degradation in carrier-to-noise density ratio (C/N0), loss-of-lock, position error, and increase in acquisition/reacquisition time for GPS receivers.

The Secure and Trusted Communications Networks Act of 2019 requires NTIA to establish an information sharing program to ensure that small, rural providers have access to the supply chain risk information they need before they make an investment.  To meet this requirement, NTIA established the Communications Supply Chain Risk Information Partnership (C-SCRIP) in July 2020. Section 8 of the Act also requires NTIA within 180 days to submit a plan to the Committee on Energy and Commerce of the House of Representatives and the Committee on Commerce, Science, and Transportation of the Senate for (i) declassifying material, when feasible, to help share information regarding supply chain security risks with trusted providers of advanced communications service and trusted suppliers of communications equipment or services; and (ii) expediting and expanding the provision of security clearances to facilitate information sharing regarding supply chain security risks with trusted providers of advanced communications service and trusted suppliers of communications equipment or services.

This Technical Report provides details about protection of federal operations in the 5.850-5.925 GHz (5.9 GHz) band from new operations considered by the Federal Communications Commission (FCC) as part of the agency’s comprehensive review intended to allow for the highest and best use of the band. As part of its ongoing effort to accommodate new commercial wireless services, the National Telecommunications and Information Administration (NTIA) worked with agencies that operate federal systems in the band to determine the protections needed to permit new commercial services to operate without causing impact to incumbent operations. To facilitate the FCC’s expeditious review of the record, NTIA already submitted to the FCC a letter setting forth the relevant protection requirements derived from the numerous details provided in this Technical Report.