Assigning time slot resources for uplink broadcast services

The FAA's Safe Flight 21 and Capstone programs are planning to deploy ground stations supporting broadcast services. Collectively, the term "broadcast services" encompasses three forms of broadcast information: automatic dependent surveillance-broadcast (ADS-B), traffic information services-broadcast (TIS-B) and flight information services broadcast (FIS-B). The Safe Flight 21 and Capstone programs both entail the installation of ground stations (referred to as ground-based transceivers - GBTs) that receive ADS-B information from, as well as transmit TIS-B and FIS-B information to equipped aircraft. The FAA has established a policy supporting two data links for broadcast services: 1090 Extended Squitter, and the Universal Access Transceiver (UAT). The initial ground infrastructures of both the Safe Flight 21 and Capstone programs are primarily limited to UAT. Therefore the focus of this paper is on the UAT data link.