Patent ID: 11881926
Assignee: ROHDE & SCHWARZ GMBH & CO. KG
Field: Control (Instruments)
Classification: CPC H  G | IPC G  H

Claim 14:
15. In an airborne communication system comprising at least one aircraft and a ground station coupled to the at least one aircraft via a communication link, a method of providing secure communication to and from the aircraft, the method comprising the steps of:
generating and transmitting by a ground station, redundant VoIP (Voice over IP) and analogue communication signals simultaneously based on a same audio signal;
receiving at the aircraft the transmitted VoIP communication signal with a transmit radio unit and analogue communication signal with an IP link thereby providing a redundant communication link in which the VoIP communication signal and the analogue communication signal are simultaneously received;
evaluating the received VoIP communication signal and the received analogue communication signal based upon a predefined first criterion related to signal quality and selecting one of the received VOIP communication signal and received analogue signal that fits best the first criterion; and
forwarding only the selected signal to an audio unit of an aircraft crew member to thereby communicate with the aircraft crew member.