The service consists of a set of defined procedures for some mission types where there may be an impact on ATC; for example crossing certain types of controlled airspace under prescribed conditions. The procedures ensure clear and unambiguous drone operation, and provide an appropriate flow of information between the drone operators and ATC. Such procedures will allow drones to fly in controlled airspace and near airports with more flexibility and procedural approval/rejection based on agreed rules.
The reference for this definition is the "European ATM Master Plan: Roadmap for the safe integration of drones into all classes of airspace". On-going Research activities on U-space may update this definition in future datasets.