An XML Datalink Message Exchange Model (DMXM) for command and control data sharing

ATC services use datalink communication systems such as FANS/ACARS, FAA DCIS and EUROCONTROL DLS/Link2000+. This communication domain, specific for ANSP safety applications, uses dedicated Communication Service Provider (CSP) networks, such as Rockwell Collins (ARINC) and SITA. A need has been identified in the broader aviation community to share the updated status of ATC instructions and clearances with stakeholders other than the ANSPs. This information sharing capability should use the widely-accepted XML data format in order to leverage open publish/subscribe services, and SWIM architecture and governance. Therefore, a standard data model and interface should be defined. This paper explores the creation of a new “XM”, Datalink Messaging Exchange Model (DMXM), for datalink information sharing. Datalink messages and communication functions supported by current FANS 1/A (RTCA DO-258A/EUROCAE ED-100A) and ATN-B2 (RTCA DO-350/EUROCAE ED-228) service standards are identified for inclusion in the model. The relevant ATC communication service (AFN/CM, CPDLC, ADS-C) messages are discussed, and a preliminary XML syntax example is described based. An assessment of the architectures supporting services using this scheme is also introduced. DMXM can enable the use of a common reference data model for datalink information globally, such as through SWIM, integrated with the ATM Information Reference Model (AIRM). Aviation industry data exchange standards (e.g. ACRIS) can also benefit from the use of this information. Targeted users of applications for DMXM include airline dispatchers, pilots, airport operation control centers, and fixed-based operators such as ground handlers. DMXM will provide the aviation community with a standard data model enabling ATC consumer applications using interoperable semantics, thus achieving a higher productivity rate at a lower cost and a shorter time to deployment. Such applications will support common situational awareness for controlled flights and enable collaborative decision making among stakeholders.