C. Kurth, K.M. Göschka, and W. Kampichler (Austria)
VoIP, SIP, Voice Communication Center, Radio Service
VoIP is increasingly used in voice communication systems, where connecting to radios is an important feature. Previous publications have shown the feasibility of a basic radio service, using standard signaling protocols like the Session Initiation Protocol. Besides managing the access to a radio channel, air traffic control as well as public safety applications require advanced radio service features. Therefore, we present signaling mechanisms for providing frequency cross coupling based on a dynamic master slave model. Approaches for frequency forward and frequency intercom supplement the feature sets for modern voice communication centers, followed by audio delay tests as proof of feasibility.
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