Aeronautical Air-Ground Data Link Communications by Mohamed Slim Ben Mahmoud, Christophe Guerber, Nicolas

By Mohamed Slim Ben Mahmoud, Christophe Guerber, Nicolas Larrieu, Alain Pirovano, Jos? Radzik

This e-book bargains with air-ground aeronautical communications. the most objective is to offer the reader a survey of the at present deployed, rising and destiny communications structures devoted to electronic information communications among the plane and the floor, specifically the information hyperlink. these verbal exchange platforms convey particular houses really to these normal for terrestrial communications. during this booklet, the process architectures are extra particularly thought of from the entry to the applying layers as radio and actual functionalities have already been addressed intimately in others books.

The first half is an advent to aeronautical communications, their particular techniques, homes, standards and terminology. the second one half provides the at the moment used structures for air floor communications in continental and oceanic zone. The 3rd half enlightens the reader at the rising and destiny communique structures and a few prime study initiatives interested in this scope. eventually, prior to the realization, the fourth half provides numerous major demanding situations and learn instructions presently less than investigation.

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23 h, 56 min and 4 s. The satellite is thus seen as a fixed point in the sky, and permanent communications can be provided. Three geostationary satellites provide complete Earth coverage, with the noticeable exception of the poles. The advantages of a geostationary orbit from a geometry perspective are, however, accompanied by constraints in the design of the communication system. The long distance to be traveled by the radio signal rises a significant propagation time of about 125 ms between satellite and ground.

In this case, the ground system will have to handle both protocol stacks. ATN also defines the Context Management (CM) application which is equivalent to the AFN application in FANS 1/A: it is responsible for logging on to the ATC system, exchanging application addresses and versions along with flight plan data, so that the ground system is able to correlate a given flight plan and radar plot, with a set of application addresses. For a more detailed description of operational usage of and guidance material on data link for ATSC, refer to [ICA 13b].

Note that for these frames, the HDLC Poll/Final bit will be set to 1. On acceptance of the handover, a timer (TG5) will be activated on both sides to silently disconnect the old link after a few seconds. This delay will allow reestablishing the subnetwork connections if necessary (ATN only). As a subnetwork layer virtual circuit is only valid on the underlying link layer connection on which it has been established, each of the established circuits will be reestablished when a handoff is performed.

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