DAtalink

Data Link Initiation Capabilities (DLIC) enabling data link communication between ATC Ground and aircraft systems. DLIC is initiated when the aircraft wants to use Aeronautical Telecommunication Network (ATN) for communication purposes.

The DLIC service provides the log-on procedure to the ATN and exchanges the required application information. The DLIC process supports addressing requirements for Air Traffic Service Communication applications such as Controller Pilot Data Link Communications (CPDLC) and Automatic Dependent Surveillance (ADS);

The DLIC supports the update of application information;

The DLIC service propagates application information, implementing the contact procedure a given time before the centre exit;

Controller Pilot Data Link Communications (CPDLC) application provides the ATS facility with Datalink communications services. Two main services have to be considered: ACM and ACL;

The ATC Communications Management (ACM) service provides automated assistance to the aircrew, current and next controllers for conducting the transfer of ATC communications;

The ATC Clearance (ACL) service provides the controller with the capability to issue clearances and requests for information. The pilot is provided with the capability to respond to messages, to request clearances and information and to report information;

Pilot Preference Down-link (PPD) automates the provision to the Controllers of the Aircrew preferences (the way their flight is to be conducted) and allows for the provision of those parameters to the Controllers even before the aircraft reaches their sector.