Staff

• Reinforcement learning for wireless communications
• Resource allocation in wireless networks
• Resilience and performance guarantees

Lehre

• Fundamentals of Reinforcement Learning

Publikationen

2022

• S. Dongare, A. Ortiz, and Klein, A. „Deep Reinforcement Learning for Task Allocation in Energy Harvesting Mobile Crowdsensing“, IEEE Global Communications Conference (Globecom), Rio de Janeiro, Brazil, 2022. Accepted
• M. Wirth, A. Ortiz and A. Klein. “Risk-Aware Mulit-Armed Bandits forVehicular Communications„, IEEE 95th Vehicular Technology Conference(VTC-Spring)', Helsinki, Finland, 2022.
• B. Simon, S. Dongare, T. Mahn, A. Ortiz and A. Klein, „Delay- and Incentive-Aware Crowdsensing: A Stable Matching Approach for CoverageMaximization“, In IEEE International Conference on Communications. Seoul, South Korea, May, 2022

2021

• K. Kiekenap, A. Ortiz and A. Klein. „Energy-Optimal Short PacketTransmission for Time-Critical Control“, IEEE 94th Vehicular TechnologyConference (VTC2021-Fall) 2021, Virtual, 2021.
• A. Ortiz, T. Weber and A. Klein. „Multi-Agent Reinforcement Learning forEnergy Harvesting Two-Hop Communications with a Partially ObservableSystem State“ IEEE Transactions on Green Communications and Networking5(1), 2021.

2020

• B. Yilmaz, A. Ortiz and A. Klein. „Delay Minimization for Edge Computingwith Dynamic Server Computing Capacity: A Learning Approach(wird in neuem Tab geöffnet)“'IEEE Global Communications Conference (Globecom)', Taipei, Taiwan, 2020.

2019

• A. Ortiz, A. Asadi, G. H. Sim, D. Steinmetzer and M. Hollick, „SCAROS: AScalable and Robust Self-backhauling Solution for Highly Dynamic Millimeter-Wave Networks,“, IEEE Journal on Selected Areas in Communications, vol. 37, pp. 2585-2698, Dec 2019.
• A. Ortiz, A. Asadi, M. Engelhardt, A. Klein & M. Hollick, „CBMoS: Combinatorial Bandit Learning for Mode Selection and Resource Allocation in D2D Systems,“ IEEE Journal on Selected Areas in Communications, vol. 37, pp. 2225-2238, Oct 2019.
• A. Ortiz, T. Weber & A. Klein, „Resource Allocation in Energy HarvestingMultiple Access Scenarios via Combinatorial Learning,“ in Proc. IEEE International Workshop on Signal Processing Advances in WirelessCommunications (SPAWC), Cannes, France, Jul 2019.
• F. Hohmann, A. Ortiz & A. Klein, „Optimal Resource Allocation Policy forMulti-Rate Opportunistic Forwarding,“ in Proc. IEEE Wireless Communicationsand Networking Conference (WCNC), Marrakech, Morocco, Apr 2019.

2018 and older

• A. Ortiz, T. Weber & A. Klein, "A Two-Layer Reinforcement LearningSolution for Energy Harvesting Data Dissemination Scenarios," in Proc. IEEE International Conference on Acoustics, Speech and Signal Processing(ICASSP), Calgary, Canada, Apr 2018.
• A. Ortiz, H. Al-Shatri, X. Li, T. Weber & A. Klein, "Reinforcement Learningfor Energy Harvesting Decode-and-Forward Two-Hop Communications," IEEE Transactions on Green Communications and Networking, vol. 1, pp. 309-319, Sep 2017.
• C. Meurisch, T. Nguyen, M. Kromm, A. Ortiz, R. Mogk & M. Mühlhäuser, "DisVis 2.0: Decision Support for Rescue Missions Using Predictive DisasterSimulations with Human-Centric Models," in Proc. International Conference onComputer Communications and Networks (ICCCN), Calgary, Canada, Jul 2017.
• X. Li, A. Ortiz, H. Al Shatri, A. Klein & T. Weber, "Delay-Constrained Data Transmission for Energy Harvesting Transmitter," in Proc. 11th International ITG Conference on Systems, Communications and Coding (SCC), Hamburg, Germany, Feb 2017
• A. Ortiz, H. Al-Shatri, X. Li, T. Weber & A. Klein, "A Learning Based Solutionfor Energy Harvesting Decode-and-Forward Two-Hop Communications," in Proc. IEEE Global Communications Conference (Globecom), Washington, USA, Dec. 2016.
• A. Ortiz, H. Al-Shatri, X. Li, T. Weber & A. Klein, "Reinforcement Learningfor Energy Harvesting Point-to-Point Communications," in Proc. IEEE International Conference on Communications, Kuala Lumpur, Malaysia, May2016.
• A. Ortiz, H. Al Shatri, X. Li, T. Weber & A. Klein, "Throughput Maximizationin Two-Hop Energy Harvesting Communications," in Proc. IEEE TwelfthInternational Symposium on Wireless Communication Systems ISWCS, Brussels, Belgium, Aug 2015.
• A. Ortiz, H. Degenhardt & A. Klein, "A Resource Requirement AwareTransmit Strategy for Non-Regenerative Multi-Way Relaying," in Proc. IEEE Wireless Communication and Networking Conference (WCNC), New Orleans, USA, Mar 2015.