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Senior Researcher
Group Involvement, NEC Laboratories Europe
Space and Terrestrial Systems
Research Interests
- Intelligent and Resilient Wireless Systems
- Agentic Systems and Generative AI
Conferences
- Marco Palena, Jose A. Ayala-Romero, Andres Garcia-Saavedra, and Carla Fabiana Chiasserini. "SPIFF: Selective Preservation of Image Fidelity for Bandwidth-constrained Heterogeneous Networks." IEEE INFOCOM 2026.
- Fatih Aslan, Jose A. Ayala-Romero, Andres Garcia-Saavedra, Xavier Costa-Pérez, and George Iosifidis. "FairRIC: Real-Time Fair Allocation in O-RAN with Shared Computing." IEEE INFOCOM 2025.
- Jordi Pérez-Romero, J. Xavier Salvat Lozano, Jose A. Ayala-Romero, Oriol Sallent, Anna Umbert, Juan Sánchez-González, and Xavier Costa-Pérez. "Comparative Analysis of Reconfigurable Intelligent Surfaces and Relay Nodes for Energy Saving." 2025 Joint European Conference on Networks and Communications & 6G Summit (EuCNC/6G Summit). IEEE, 2025.
- Leonardo Lo Schiavo, Jose A. Ayala-Romero, Andres Garcia-Saavedra, Marco Fiore, and Xavier Costa-Pérez. "YinYangRAN: Resource Multiplexing in GPU-Accelerated Virtualized RANs." IEEE INFOCOM 2024.
- Jose A. Ayala-Romero, Leonardo Lo Schiavo, Andres Garcia-Saavedra, and Xavier Costa-Pérez. "Mean-Field Multi-Agent Contextual Bandit for Energy-Efficient Resource Allocation in vRANs." IEEE INFOCOM 2024.
- Jose A. Ayala-Romero, Andres Garcia-Saavedra, and Xavier Costa-Pérez. "Risk-Aware Continuous Control with Neural Contextual Bandits." Proceedings of the AAAI Conference on Artificial Intelligence. 2024.
- Ethan Sanchez Hidalgo, J. Xavier Salvat Lozano, Jose A. Ayala-Romero, Andres Garcia-Saavedra, Xi Li, and Xavier Costa-Pérez. "MemorAI: Energy-Efficient Last-Level Cache Memory Optimization for Virtualized RANs." IEEE ICMLCN 2024. Best paper award.
- Jose A. Ayala-Romero, Péter Mernyei, Bichen Shi, and Diego Mazón. "KRAF: A Flexible Advertising Framework using Knowledge Graph-Enriched Multi-Agent Reinforcement Learning." ACM CIKM 2022 - Proceedings of the 31st ACM International Conference on Information & Knowledge Management. 2022
- Jose A. Ayala-Romero, Andres Garcia-Saavedra, Xavier Costa-Pérez, and George Iosifidis. "EdgeBOL: Automating energy-savings for mobile edge AI." ACM CoNEXT 2021 - Proceedings of the 17th International Conference on emerging Networking EXperiments and Technologies. 2021.
- Jose A. Ayala-Romero, Ihtisham Khalid, Andres Garcia-Saavedra, Xavier Costa-Pérez, and George Iosifidis. "Experimental evaluation of power consumption in virtualized base stations." ICC 2021-IEEE International Conference on Communications. IEEE, 2021.
- Jose A. Ayala-Romero, Andres Garcia-Saavedra, Xavier Costa-Pérez, and George Iosifidis. "Bayesian online learning for energy-aware resource orchestration in virtualized rans." IEEE INFOCOM 2021-IEEE Conference on Computer Communications. IEEE, 2021.
- Apostolos Galanopoulos, Jose A. Ayala-Romero, Douglas J. Leith, and George Iosifidis. "AutoML for video analytics with edge computing." IEEE INFOCOM 2021-IEEE Conference on Computer Communications. IEEE, 2021.
- Apostolos Galanopoulos, Jose A. Ayala-Romero, Douglas J. Leith, and George Iosifidis. "Bayesian online learning for mec object recognition systems." GLOBECOM 2020-2020 IEEE Global Communications Conference. IEEE, 2020.
- Jose A. Ayala-Romero, Andres Garcia-Saavedra, Marco Gramaglia, Xavier Costa-Perez, Albert Banchs, and Juan J. Alcaraz. "vrAIn: A deep learning approach tailoring computing and radio resources in virtualized RANs." ACM MOBICOM 2019 - The 25th Annual International Conference on Mobile Computing and Networking. 2019.
- Jose A. Ayala-Romero, Andres Garcia-Saavedra, Marco Gramaglia, Xavier Costa-Perez, Albert Banchs, and Juan J. Alcaraz. "vrAIn Proof-of-Concept--A Deep Learning Approach for Virtualized RAN Resource Control." ACM MOBICOM 2019 - The 25th Annual International Conference on Mobile Computing and Networking. 2019.
Journals
- Girma M. Yilma, Jose A. Ayala-Romero, Andres Garcia-Saavedra, and Xavier Costa-Pérez. "TelecomRAG: Taming telecom standards with retrieval augmented generation and LLMs." ACM SIGCOMM Computer Communication Review 54.3 (2025): 18-23.
- Ethan Sanchez Hidalgo, Jose A. Ayala-Romero, Josep Xavier Salvat Lozano, Andres Garcia-Saavedra, and Xavier Costa-Pérez. "AegisRAN: A fair and energy-efficient computing resource allocation framework for vRANs." IEEE Transactions on Mobile Computing 24.10 (2025): 9441-9457.
- Nikolaos Apostolakis, Marta Sierra-Obea, Marco Gramaglia, Jose A. Ayala-Romero, Andres Garcia-Saavedra, Marco Fiore, Albert Banchs, and Xavier Costa-Pérez. "Quantum Computing in the RAN with Qu4Fec: Closing Gaps Towards Quantum-based FEC Processors." Proceedings of the ACM on Measurement and Analysis of Computing Systems 9.2 (2025): 1-25.
- Fatih Aslan, George Iosifidis, Jose A. Ayala-Romero, Andres Garcia-Saavedra, and Xavier Costa-Pérez. "Fair Resource Allocation in Virtualized O-RAN Platforms." Proceedings of the ACM on Measurement and Analysis of Computing Systems 8.1 (2024): 1-34.
- Jose A. Ayala-Romero, Andres Garcia-Saavedra, Xavier Costa-Pérez, and George Iosifidis. "EdgeBOL: a bayesian learning approach for the joint orchestration of vRANs and mobile edge AI." IEEE/ACM Transactions on Networking 31.6 (2023): 2978-2993.
- J. Xavier Salvat, Jose A. Ayala-Romero, Lanfranco Zanzi, Andres Garcia-Saavedra, and Xavier Costa-Pérez. "Open Radio Access Networks (O-RAN) Experimentation Platform: Design and Datasets." IEEE Communications Magazine 61.9 (2023): 138-144.
- Jose A. Ayala-Romero, Andres Garcia-Saavedra, Xavier Costa-Pérez, and George Iosifidis. "Orchestrating Energy-Efficient vRANs: Bayesian Learning and Experimental Results." IEEE Transactions on Mobile Computing (2021).
- Jose A. Ayala-Romero, Andres Garcia-Saavedra, Marco Gramaglia, Xavier Costa-Perez, Albert Banchs, and Juan J. Alcaraz. " vrAIn: Deep Learning based Orchestration for Computing and Radio Resources in vRANs." IEEE Transactions on Mobile Computing 21.7 (2020): 2652-2670.
- Fahri Wisnu Murti, Jose A. Ayala-Romero, Andres Garcia-Saavedra, Xavier Costa-Pérez, and George Iosifidis. "An optimal deployment framework for multi-cloud virtualized radio access networks." IEEE Transactions on Wireless Communications 20.4 (2020): 2251-2265.
- Jose A. Ayala-Romero, Juan J. Alcaraz, Andrea Zanella, and Michele Zorzi. "Online learning for energy saving and interference coordination in hetnets." IEEE Journal on Selected Areas in Communications 37.6 (2019): 1374-1388.