Our team from the Teleinfrastructure Research Lab at Faculty of Telecommunications, Technical University of Sofia, Bulgaria took part in the Fourth Internal Workshop on Wireless Communications at TU Wien in Vienna, Austria, held during 7–10 April 2026. The visit included Slavcho Neshev, Rumen Doynov, Ivailo Bozhilov, Monika Velichkova, and Dr. Antoni Ivanov and was carried out in connection with the activities of WP2 of the ENCORE-6G project, focused on research excellence and research integrity in the field of integrated sensing and communications.
During the four-day programme, they had the opportunity not only to present their work, but also to engage in vivid discussions with colleagues from TU Wien and partner institutions on a wide range of topics in wireless communications, machine learning, beamforming, radio environment mapping, ray tracing, RIS, ISAC, and digital twins. Particularly interesting were the presentations on AI-based CSI learning, validation of ray-tracing systems in large-scale urban environments, digital twins for industrial 5G systems, radio map estimation from sparse or censored measurements, and calibrated digital-twin channel datasets, all of which sparked valuable discussions on future research directions and possible collaborations.
Our participation also highlighted the active contribution of TU Sofia to the workshop. Monika Velichkova presented work on optimal beam direction determination using deep learning models for obstacle detection, focusing on data-driven beam management and uncertainty-aware prediction. Dr. Antoni Ivanov presented 3D REM-based aerial base station positioning in UAV-assisted networks, exploring the use of three-dimensional radio environment maps for aerial network optimization. Slavcho Neshev presented semantic-aware proactive resource allocation and beamforming for QoS-critical wireless systems, addressing the integration of 3D scene understanding into proactive wireless control. Ivailo Bozhilov contributed with a presentation on deep autoencoder architectures for sparse geometry coding and transmission of sparse point clouds, linking compression, robustness, and efficient 3D content delivery.
The workshop was an excellent opportunity for knowledge exchange, feedback, and deeper scientific dialogue in a strong international research environment. Beyond the presentations themselves, the discussions throughout the event helped refine ideas, connect ongoing efforts across institutions, and strengthen the role of our ENCORE-6G team in advancing research at the intersection of wireless communications, machine learning, and digital representations of complex environments.
