CBRS stands for Citizens Broadband Radio Service. It is a wireless communication framework in the United States that allows shared access to a portion of the 3.5 GHz spectrum band for various purposes, including broadband connectivity.

CBRS operates on a three-tiered sharing model, consisting of Incumbent Access, Priority Access, and General Authorized Access. Incumbent Access is reserved for existing users, such as government and military organizations. Priority Access provides licensed access to specific entities, such as businesses or educational institutions. General Authorized Access allows unlicensed access to the CBRS spectrum by any user meeting certain requirements.

The CBRS framework enables efficient spectrum utilization and promotes innovation in wireless services and applications. It is particularly useful for deploying private LTE networks, improving wireless connectivity in rural areas, and supporting various Internet of Things (IoT) applications.

To access the CBRS spectrum, devices need to be certified as CBRS-compatible and adhere to the rules and regulations set forth by the Federal Communications Commission (FCC).

Overall, CBRS plays a significant role in expanding wireless connectivity options, promoting competition, and enabling new use cases in the United States by providing shared access to the 3.5 GHz spectrum band.