Sánchez Agüero, VíctorFas-Millán, Miguel ÁngelValera Pintor, FranciscoVidal Fernández, IvánPaniagua Tineo, AlejandroLópez da Silva, Rafael A.Manjón, José Manuel2023-03-132023-03-132022-01-242021 IEEE Globecom Workshops (GC Wkshps): proceedings, Madrid, Spain, 7-11 December 2021. IEEE, cop. 2021.978-1-6654-2390-8https://hdl.handle.net/10016/36818Proceeding of 2021 IEEE Globecom Workshops (GC Wkshps), Madrid, Spain, 7-11 December 2021.Recent efforts to manage Unmanned Aerial Vehicle (UAV) operations in European civilian environments have resulted in the development of U-space, the European Union’s UAS Traffic Management (UTM) concept of operations. This paper presents the primary purposes of the H2020 Labyrinth project (mainly focusing on the communications architecture), which has as its main challenge to create and validate UAV applications through the research and development of path-planning algorithms and new UTM services. In addition, this article performs a preliminary validation of a communications prototype (including three communication alternatives) with real equipment of the National Institute of Aerospace Technology (INTA) of the Spanish Ministry of Defense. The presented results show the functionality of the prototypes and serve as a starting point to develop the requirements defined in the communications architecture.6eng© 2021 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved.Unmanned aerial vehicles (UAV)Unmanned traffic management (UTM)U-SpaceGround control station (GCS)Communications frameworkconference paperTelecomunicacioneshttps://doi.org/10.1109/GCWkshps52748.2021.9682019open access162021 IEEE Globecom Workshops (GC Wkshps): proceedings, Madrid, Spain, 7-11 December 2021.CC/0000034091