• Gives ANSPs full control over datalink provision in whole or part of their airspace
• Optimizes spectrum capacity and improves network performance while reducing costs
• Smoothly integrates with legacy networks and ATC systems
• Provides support for multi-frequency (Model C/D compatible)
• Allows ANSPs to offer added-value infrastructure services to airlines and service providers
• Supports multiple GSIF implementations: no need for aircraft retrofits

An all-inclusive ground datalink infrastructure

ADELIS is a turn-key ground infrastructure solution that relies on a scalable VDL M2 ground stations network adapting to any airspace size or configuration. Multi-frequency operations are managed by a Centralized VDL Mode 2 Management Entity (C-VME) implementing efficient load-balancing mechanisms for an optimized use of the spectrum and network capacity.

It includes ATN air-ground and ground-ground routers as well as an ACARS processor offering, respectively, an IP SNDCF interface and an ARINC 620 / BATAP-MATIP interface with customer ANSPs network infrastructure and ATC systems. Traffic is routed from/to neighbour ANSPs as well as airlines operations centers via an interconnection with legacy CSP networks allowing cross-border ATC communications and seamless airline operations through.

ADELIS comes along with sophisticated performance monitoring and network management functions improving network operations efficiency and quality of the end-to-end service. It also includes recording, billing and reporting functions.

• Supported protocols: SNDCF, ES-IS, IDRP, TP4, ULCS, ASEs (CM, CPDLC, ADS-C), ACARS (A620/A622)
• Interfaces: SNDCF over IP ; BATAP / MATIP Type B
• Scalable architecture supporting over 10000 connections, up to 12 adjacencies
• Provides support for multi-frequency (Model C/D compatible)
• Redundant configuration
• Compliant with European Regulations
• Software Assurance Level AL5

ATN: the Aeronautical Telecommunications Network

ATN, or the Aeronautical Telecommunications Network, is a worldwide network infrastructure designed to support all types of aviation air-ground communications. ATN is currently used in Europe for CPDLC applications (ATN Baseline 1) and also for enhanced Air Traffic Services (ATN Baseline 2), including the Initial 4-Dimension Trajectory concept (enhanced route clearances; 4D trajectory negotiation with ATC).

The current ATN infrastructure relies on the OSI (Open Systems Interconnection) model. However, evolutions are ongoing to implement an IP-based network infrastructure supporting ATN applications: ATN/IPS (Internet Protocol Suite).

The IPS infrastructure will provide an air-ground network offering higher reliability and increased security for both ATC and AOC communications. ATN/IPS will offer a more secure air/ground link between aircraft and ground stations, and will improve the security of the end-to-end transmission of ATC and AOC applications.

The ATN/IPS targeted subnetwork will additionally offer improved datalink performance as well as higher bandwidth. IPS will utilize multiple air-ground links, including the legacy VDL Mode 2 link, Future SatCom (such as SwiftBroadband, Iris Service Evolution), LDACS, and AeroMACS. The implementation of the ATN/IPS network will serve as an enabler for several technological concepts such as 4D-Trajectory-based operations and performance-based operations.