Event-based radio communication signalling using the session initiation protocol

Abstract

Voice communication for air traffic control has its own and more stringent requirements compared to voice communication in public environments. These include among others faster call setup and extended signalling for radio communication. We present a radio channel model and an architecture for radio communication based on open standards. We show how the session initiation protocol (SIP) and its extensions are used to handle the extended signalling for shared radio access. Furthermore, we show how SIP session timers have to be adopted to achieve faster failure detection. Measurements of the call setup delays and the event notification delays, and their comparison with air traffic control requirements proof the feasibility of the presented concept.