By Mohamed Slim Ben Mahmoud, Christophe Guerber, Nicolas Larrieu, Alain Pirovano, Jos? Radzik
This ebook bargains with air-ground aeronautical communications. the most target is to offer the reader a survey of the at present deployed, rising and destiny communications platforms devoted to electronic facts communications among the plane and the floor, specifically the knowledge hyperlink. these conversation structures express particular houses quite to these primary for terrestrial communications. during this e-book, the procedure architectures are extra particularly thought of from the entry to the appliance layers as radio and actual functionalities have already been addressed intimately in others books.
The first half is an creation to aeronautical communications, their particular suggestions, houses, standards and terminology. the second one half provides the at present used structures for air floor communications in continental and oceanic region. The 3rd half enlightens the reader at the rising and destiny verbal exchange platforms and a few best study tasks interested in this scope. eventually, earlier than the belief, the fourth half provides a number of major demanding situations and study instructions presently lower than investigation.
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Extra resources for Aeronautical Air-Ground Data Link Communications
P stands for Packet. The P channel is dedicated to the communications from Earth stations (GES) to the aircraft (AES). GES transmits a continuous carrier and multiplexes data (Time Division Multiplex (TDM)). The P channel carries both signaling and data packets. Aircraft recover data by address filtering. The main benefits of the TDM access are its simplicity and capability to multiplex unicast (from GES to one single aircraft), multicast (from GES to a group of aircraft) and broadcast traffic (from GES to all aircraft).
6. LEO satellites alternative, brief presentation of Iridium Iridium is a system of communication satellites in low Earth orbits. The satellites are placed at an altitude of 781 km. Sixty-six active satellites are needed to provide complete coverage of the Earth, 10 spare satellites are also deployed for system reliability [ICA 10a]. The system management is relatively complex, since the visibility period of each satellite is limited (about 10 min), which involves handover during communications.
Other simulation campaigns were performed by EUROCONTROL with the intent to study p-value influence on performances and multichannel deployment scenarios. Simulations showed that some performance improvements may be achieved by fine tuning the value of the probability and in particular by using a higher value for ground stations than for aircraft. Finally, the simulation tool was also used to evaluate the number of additional VDL 2 channels to be operated so as to cope with increasing Link 2000+ equipage ratios to support ATN CPDLC application in Europe.
Aeronautical Air-Ground Data Link Communications by Mohamed Slim Ben Mahmoud, Christophe Guerber, Nicolas Larrieu, Alain Pirovano, Jos? Radzik