On August 16, 2024, the U.S. Federal Communications Commission (FCC) released a Notice of Proposed Rulemaking (NPRM) and Declaratory Ruling seeking to revise the rules for the Citizens Broadband Radio Service (CBRS) band, 3.55-3.7 GHz [1]. While CBRS was developed specifically for the U.S. spectrum regulatory regime, it has inspired similar use of shared, locally licensed spectrum in other countries, for example in the U.K., where Ofcom is seeking to enhance access to shared spectrum in 3.8-4.2 GHz and aligning operational rules with CBRS [2]. This column will briefly summarize the background of the band, existing CBRS deployments and interesting research problems arising from the enhancements proposed in [1].
