While the vision of fully automated road traffic implies the total disappearance of traffic jams, the implications of mixed traffic on the traffic flow are still unclear. Currently, the presented automated vehicles react defensively to human misbehaviour. Therefore, a significant reduction of the traffic flow is anticipated for the hybrid traffic - while the overall traffic congestion is expected to grow through empty runnings, especially for the commercial transport. In the following, the term automated vehicle describes a vehicle that drives without a human driver but still needs a fixed start- and endpoint as well as a route definition. This means that the car is able to change lanes to overtake, but it does not take turns on its own accord for a more efficient route.
Based on the results of the second phase, the traffic flow will be predicted and optimised in different environments (e.g., highway, inner city) with increasing grades of automation by cooperation of traffic modeling, data analysis, and communication. The overall aim is to minimise the total dwell time of all vehicles inside the traffic network. For this purpose, the microscopic traffic simulation models will be extended by communicating automated vehicles in order to allow the simulation of different realizations of the behaviour of these vehicles and to elaborate the potentials for further optimisation. The traffic prediction is then performed based on these models.
In so-called closed-loop-scenarios, strategies for traffic control will be developed with deep reinforcement learning methods that also consider human drivers, which only follow the developed model sporadically. The central as well as the local exchange of the required data will follow the privacy-by-design paradigm in order to protect the distribution of sensitive mobility patterns, for example, through application of homeomorphic encryption.
For the provision of Ultra-reliable Low Latency Communication (URLLC) in a Vehicle-to-Everything (V2X) context, available knowledge about the mobility behaviour of vehicles and information about the topology of the surrounding environment will be leveraged for predictive routing, handover, and resource allocation as well as dynamic antenna steering in order to optimise decision processes within 5G networks. The respective methods will furthermore be integrated into the predictive Channel-aware Transmission (pCAT) scheme that was developed in the second phase and evaluated in field tests.
| Geis/etal/2022a |
Geis, Melina and Sliwa, Benjamin and Bektas, Caner and Wietfeld, Christian.
TinyDRaGon: Lightweight Radio Channel Estimation for 6G Pervasive Intelligence.
In
IEEE Future Networks World Forum (FNWF),
Montreal, Canada,
2022.
|
| Roth/Liebig/2022a |
Roth, Andreas and Liebig, Thomas.
Transforming PageRank into an Infinite-Depth Graph Neural Network.
In
Joint European Conference on Machine Learning and Knowledge Discovery in Databases,
Springer,
2022.
|
| Roth/Liebig/2022b |
Roth, Andreas and Liebig, Thomas.
Forecasting Unobserved Node States with spatio-temporal Graph Neural Networks.
In
International Conference on Data Mining Workshops,
IEEE,
2022.
|
| Schippers/etal/2022a |
Schippers, Hendrik and Schüler, Cedrik and Sliwa, Benjamin and Wietfeld, Christian.
System Modeling and Performance Evaluation of Predictive QoS for Future Tele-Operated Driving.
In
nnual IEEE International Systems Conference (SysCon),
2022.
|
| Schueler/etal/2022a |
Schüler, Cedrik and Gebauer, Tim and Patchou, Manuel and Wietfeld, Christian.
QoE Evaluation of Real-Time Remote Operation with Network Constraints in a System-of-Systems.
In
Annual IEEE International Systems Conference (SysCon),
2022.
|
| Shao/etal/2021a |
Xiaoting Shao and Alejandro Molina and Antonio Vergari and Karl Stelzner and Robert Peharz and Thomas Liebig and Kristian Kersting.
Conditional Sum-Product Networks: Modular Probabilistic Circuits via Gate Functions.
In
International Journal of Approximate Reasoning,
pages 298-313,
2022.
|
| Sliwa/etal/2022a |
Benjamin Sliwa and Melina Geis and Caner Bektas and Melisa López and Preben Mogensen, and Christian Wietfeld.
DRaGon: Mining latent radio channel information from geographical data leveraging deep learning.
In
2022 IEEE Wireless Communications and Networking Conference (WCNC),
Austin, Texas, USA,
2022.
|
| Bektas/etal/2021a |
Caner Bektas and Dennis Overbeck and Christian Wietfeld.
SAMUS: Slice-Aware Machine Learning-based Ultra-Reliable Scheduling.
In
2021 IEEE International Conference on Communications (ICC),
Montreal, Canada,
2021.
|
| Bektas/etal/2021b |
Caner Bektas and Cedrik Schüler and Robert Falkenberg and Philipp Gorczak and Stefan Böcker and Christian Wietfeld.
On the Benefits of Demand-Based Planning and Configuration of Private 5G Networks.
In
2021 IEEE Vehicular Networking Conference (VNC),
Virtual Event,
2021.
|
| Eckermann/Wietfeld/2021a |
Fabian Eckermann and Christian Wietfeld.
SDR-based open-source C-V2X traffic generator for stress testing vehicular communication.
In
2021 IEEE 93rd Vehicular Technology Conference (VTC-Spring),
Helsinki, Finland,
2021.
|
| Haferkamp/etal/2021a |
Marcus Haferkamp and Benjamin Sliwa and Christian Wietfeld.
A Low Cost Modular Radio Tomography System for Bicycle and Vehicle Detection and Classification.
In
2021 Annual IEEE International Systems Conference (SysCon),
Vancouver, Canada,
2021.
|
| Haritz/etal/2021a |
Haritz, Pierre and Pfahler, Lukas and Liebig, Thomas and Kotthaus, Helena.
Self-Supervised Source Code Annotation from Related Research Papers.
In
Proceedings of the PhD Forum of the 21st IEEE International Conference on Data Mining,
pages 1083-1084,
2021.
|
| Heimann/etal/2021a |
Karsten Heimann and Benjamin Sliwa and Manuel Patchou and Christian Wietfeld.
Modeling and Simulation of Reconfigurable Intelligent Surfaces for Hybrid Aerial and Ground-based Vehicular Communications.
2021.
|
| Patchou/etal/2021a |
Manuel Patchou and Benjamin Sliwa and Christian Wietfeld.
Flying Robots for Safe and Efficient Parcel Delivery Within the COVID-19 Pandemic.
In
2021 IEEE 15th International Systems Conference,
Vancouver, Canada,
2021.
|
| Roth/etal/2021a |
Roth, Andreas and Wüstefeld, Konstantin and Weichert, Frank.
A Data-Centric Augmentation Approach for Disturbed Sensor Image Segmentation.
In
Journal of Imaging,
Vol. 7,
No. 10,
2021.
|
| Sachweh/etal/2021a |
Timon Sachweh and Daniel Boiar and Thomas Liebig.
Differentially Private Learning from Label Proportions.
In
Proceedings of the ECML Workshop on Parallel, Distributed, and Federated Learning,
pages accepted,
2021.
|
| Schueler/etal/2021a |
Cedrik Schüler and Manuel Patchou and Benjamin Sliwa and Christian Wietfeld.
Robust machine learning-enabled routing for highly mobile vehicular networks with PARRoT in ns-3.
In
Proceedings of the 2021 Workshop on Ns-3,
Virtual,
2021.
|
| Schueler/etal/2021b |
Schüler, Cedrik and Sliwa, Benjamin and Wietfeld, Christian.
Towards Machine Learning-Enabled Context Adaption for Reliable Aerial Mesh Routing.
In
2021 IEEE 94th Vehicular Technology Conference (VTC-Fall),
Virtual Event,
2021.
|
| Sliwa/etal/2021a |
Benjamin Sliwa and Cedrik Schüler and Manuel Patchou and Christian Wietfeld.
PARRoT: Predictive ad-hoc routing fueled by reinforcement learning and trajectory knowledge.
In
2021 IEEE 93rd Vehicular Technology Conference (VTC-Spring),
Helsinki, Finland,
2021.
|
| Sliwa/etal/2021b |
Benjamin Sliwa and Rick Adam and Christian Wietfeld.
Client-Based Intelligence for Resource Efficient Vehicular Big Data Transfer in Future 6G Networks.
In
IEEE Transactions on Vehicular Technology,
2021.
|
| Vranken/etal/2021a |
Tim Vranken and Benjamin Sliwa and Christian Wietfeld and Michael Schreckenberg.
Adapting a cellular automata model to describe heterogeneous traffic with human-driven, automated, and communicating automated vehicles.
In
Physica A: Statistical Mechanics and its Applications,
2021.
|
| Ali/etal/2020a |
Samad Ali and Walid Saad and Nandana Rajatheva and Kapseok Chang and Daniel Steinbach and Benjamin Sliwa and Christian Wietfeld and Kai Mei and Hamid Shiri and Hans-Jürgen Zepernick and Thi My Chinh Chu and Ijaz Ahmad and Jyrki Huusko and Jaakko Suutala and Shubhangi Bhadauria and Vimal Bhatia and Rangeet Mitra and Saidhiraj Amuru and Robert Abbas and Baohua Shao and Michele Capobianco and Guanghui Yu and Maelick Claes and Teemu Karvonen and Mingzhe Chen and Maksym Girnyk and Hassan Malik.
6G White Paper on Machine Learning in Wireless Communication Networks.
2020.
|
| Eckermann/etal/2020a |
Fabian Eckermann and Philipp Gorczak and Christian Wietfeld.
Cooperative Validation of CAM Position Information Using C-V2X.
In
2020 IEEE 92th Vehicular Technology Conference (VTC-Fall),
Victoria, B.C., Canada,
2020.
|
| Gueldenring/etal/2020a |
Johannes Güldenring and Philipp Gorczak and Fabian Eckermann and Manuel Patchou and Janis Tiemann and Fabian Kurtz and Christian Wietfeld.
Reliable Long-Range Multi-Link Communication for Unmanned Search and Rescue Aircraft Systems in Beyond Visual Line of Sight Operation.
In
Drones,
Vol. 4,
No. 2,
MDPI,
2020.
|
| Gueldenring/Wietfeld/2020a |
Johannes Gueldenring and Christian Wietfeld.
Scalability Analysis of Context-Aware Multi-RAT Car-to-Cloud Communication.
In
2020 IEEE 92th Vehicular Technology Conference (VTC-Fall),
Victoria, B.C., Canada,
IEEE,
2020.
|
| Heimann/etal/2020a |
Karsten Heimann and Janis Tiemann and Stefan Böcker and Christian Wietfeld.
Cross-Bearing based Positioning as a Feature of 5G Millimeter Wave Beam Alignment.
In
IEEE 91st Vehicular Technology Conference (VTC-Spring),
Antwerp, Belgium,
2020.
|
| Heimann/etal/2020b |
Heimann, Karsten and Marsch, Adrian and Sliwa, Benjamin and Wietfeld, Christian.
Reflecting Surfaces for Beyond Line-Of-Sight Coverage in Millimeter Wave Vehicular Networks.
In
IEEE Vehicular Networking Conference (VNC),
2020.
|
| Sanders/Liebig/2020a |
Sanders, Cedric and Liebig, Thomas.
Knowledge Discovery on Blockchains: Challenges and Opportunities.
In
Proceedings of the ECML Workshop on Parallel, Distributed, and Federated Learning,
2020.
|
| Schoenberger/etal/2020a |
Schönberger, Lea and von der Brüggen, Georg and Chen, Kuan-Hsun and Sliwa, Benjamin and Youssef, Hazem and Ramachandran, Aswin and Wietfeld, Christian and ten Hompel, Michael and Chen, Jian-Jia.
Offloading Safety- and Mission-Critical Tasks via Unreliable Connections.
In
32nd Euromicro Conference on Real-Time Systems (ECRTS),
2020.
|
| Shao/etal/2020a |
Xiaoting Shao and Alejandro Molina and Antonio Vergari and Karl Stelzner and Robert Perharz and Thomas Liebig and Kristian Kersting.
Conditional Sum-Product Networks: Composing Neural Networks into Probabilistic Tractable Models.
In
Proceedings of the 10th International Conference on Probabilistic Graphical Models,
2020.
|
| Sliwa/etal/2020a |
Benjamin Sliwa and Robert Falkenberg and Christian Wietfeld.
Machine learning for resource-efficient data transfer in mobile crowdsensing.
In
Fa-Long Luo (editors),
Machine Learning for Future Wireless Communications,
John Wiley & Sons Inc,
2020.
|
| Sliwa/etal/2020b |
Benjamin Sliwa and Robert Falkenberg and Christian Wietfeld.
Towards cooperative data rate prediction for future mobile and vehicular 6G networks.
In
2nd 6G Wireless Summit (6G SUMMIT),
Levi, Finland,
IEEE,
2020.
|
| Sliwa/etal/2020d |
Benjamin Sliwa and Niko Piatkowski and Christian Wietfeld.
The channel as a traffic sensor: Vehicle detection and classification based on radio fingerprinting.
In
IEEE Internet of Things Journal,
2020.
|
| Sliwa/etal/2020e |
Benjamin Sliwa and Manuel Patchou and Karsten Heimann and Christian Wietfeld.
Simulating hybrid aerial- and ground-based vehicular networks with ns-3 and LIMoSim.
In
Proceedings of the 2020 Workshop on Ns-3,
Gaithersburg, Maryland, USA,
2020.
|
| Sliwa/etal/2020f |
Benjamin Sliwa and Manuel Patchou and Christian Wietfeld.
The Best of Both Worlds: Hybrid Data-Driven and Model-Based Vehicular Network Simulation.
In
2020 IEEE Global Communications Conference (GLOBECOM),
Taipei, Taiwan,
2020.
|
| Sliwa/Wietfeld/2020a |
Benjamin Sliwa and Christian Wietfeld.
A Reinforcement Learning Approach for Efficient Opportunistic Vehicle-to-Cloud Data Transfer.
In
2020 IEEE Wireless Communications and Networking Conference (WCNC),
Seoul, South Korea,
2020.
|
| Thrane/etal/2020a |
Jakob Thrane and Benjamin Sliwa and Christian Wietfeld and Henrik Christiansen.
Deep Learning-based Signal Strength Prediction Using Geographical Images and Expert Knowledge.
In
2020 IEEE Global Communications Conference (GLOBECOM),
Taipei, Taiwan,
2020.
|
| Buschjaeger/etal/2019a |
Buschjäger, Sebastian and Liebig, Thomas and Morik, Katharina.
Gaussian Model Trees for Traffic Imputation.
In
Proceedings of the International Conference on Pattern Recognition Applications and Methods (ICPRAM),
pages 243 - 254,
SciTePress,
2019.
|
| Heimann/etal/2019a |
Karsten Heimann and Philipp Gorczak and Caner Bektas and Felix Girke and Christian Wietfeld.
Software-Defined End-to-End Evaluation Platform for Quality of Service in Non-Standalone 5G Systems.
In
2019 Annual IEEE International Systems Conference (SysCon),
IEEE,
2019.
|
| Heimann/etal/2019b |
Heimann, Karsten and Tiemann, Janis and Yolchyan, Davit and Wietfeld, Christian.
Experimental 5G mmWave Beam Tracking Testbed for Evaluation of Vehicular Communications.
In
IEEE 2nd 5G World Forum (5GWF) (WF-5G'19),
2019.
|
| Patchou/etal/2019a |
Manuel Patchou and Benjamin Sliwa and Christian Wietfeld.
Unmanned Aerial Vehicles in Logistics: Efficiency Gains and Communication Performance of Hybrid Combinations of Ground and Aerial Vehicles.
In
IEEE Vehicular Networking Conference (VNC) 2019,
Los Angeles, USA,
2019.
|
| Sanders/Liebig/2019a |
Sanders, Cedric and Liebig, Thomas.
Knowledge Discovery on Blockchains: Challenges and Opportunities.
In
arXiv preprint arXiv:1904.07104,
2019.
|
| Shao/etal/2019a |
Xiaoting Shao and Alejandro Molina and Antonio Vergari and Karl Stelzner and Robert Peharz and Thomas Liebig and Kristian Kersting.
Conditional Sum-Product Networks: Imposing Structure on Deep Probabilistic Architectures.
In
Proceedings of the 3rd Workshop on Tractable Probabilistic Modeling at ICML2019,
pages accepted,
2019.
|
| Sliwa/etal/2019a |
Benjamin Sliwa and Stefan Falten and Christian Wietfeld.
Performance evaluation and optimization of B.A.T.M.A.N. V routing for aerial and ground-based mobile ad-hoc networks.
In
2019 IEEE 89th Vehicular Technology Conference (VTC-Spring),
Kuala Lumpur, Malaysia,
2019.
|
| Sliwa/etal/2019b |
Benjamin Sliwa and Thomas Liebig and Tim Vranken and Michael Schreckenberg and Christian Wietfeld.
System-of-systems modeling, analysis and optimization of hybrid vehicular traffic.
In
2019 Annual IEEE International Systems Conference (SysCon),
Orlando, Florida, USA,
IEEE,
2019.
|
| Sliwa/etal/2019c |
Sliwa, Benjamin and Falkenberg, Robert and Liebig, Thomas and Piatkowski, Nico and Wietfeld, Christian.
Boosting Vehicle-to-cloud Communication by Machine Learning-enabled Context Prediction.
In
IEEE Transactions on Intelligent Transportation Systems,
2019.
|
| Sliwa/etal/2019d |
Benjamin Sliwa and Manuel Patchou and Christian Wietfeld.
Lightweight simulation of hybrid aerial- and ground-based vehicular communication networks.
In
2019 IEEE 90th Vehicular Technology Conference (VTC-Fall),
Honolulu, Hawaii, USA,
2019.
|
| Sliwa/etal/2019e |
Benjamin Sliwa and Robert Falkenberg and Christian Wietfeld.
Machine Learning for Resource-Efficient Data Transfer in Mobile Crowdsensing.
In
Fa-Long Luo (editors),
Machine Learning for Future Wireless Communications,
pages 137-156,
John Wiley & Sons, Ltd,
2019.
|
| Sliwa/Wietfeld/2019a |
Benjamin Sliwa and Christian Wietfeld.
Towards data-driven simulation of end-to-end network performance indicators.
In
2019 IEEE 90th Vehicular Technology Conference (VTC-Fall),
Honolulu, Hawaii, USA,
2019.
|
| Sliwa/Wietfeld/2019b |
Benjamin Sliwa and Christian Wietfeld.
Empirical analysis of client-based network quality prediction in vehicular multi-MNO networks.
In
2019 IEEE 90th Vehicular Technology Conference (VTC-Fall),
Honolulu, Hawaii, USA,
2019.
|
| Sliwa/Wietfeld/2019c |
Benjamin Sliwa and Christian Wietfeld.
LIMoSim: A Framework for Lightweight Simulation of Vehicular Mobility in Intelligent Transportation Systems.
In
Antonio Virdis and Michael Kirsche (editors),
Recent Advances in Network Simulation: The OMNeT++ Environment and its Ecosystem,
pages 347--363,
Springer,
2019.
|
| Sliwa/Wietfeld/2019d |
Benjamin Sliwa and Christian Wietfeld.
Data-driven network simulation for performance analysis of anticipatory vehicular communication systems.
In
IEEE Access,
2019.
|
| Becker/Schreckenberg/2018a |
Becker, Merlin and Schreckenberg, Michael.
Effiziente rechnergestützte Berechnung und Visualisierung von Mindestzugfolgezeiten.
In
Eisenbahntechnische Rundschau,
Vol. 1+2,
No. 67,
pages 30--34,
2018.
|
| Eckermann/etal/2018a |
Fabian Eckermann and Philipp Gorczak and Christian Wietfeld.
tinyLTE: Lightweight, ad hoc deployable cellular network for vehicular communication.
In
IEEE Vehicular Technology Conference (VTC-Spring),
2018.
|
| Falkenberg/etal/2018b |
Robert Falkenberg and Benjamin Sliwa and Nico Piatkowski and Christian Wietfeld.
Machine Learning Based Uplink Transmission Power Prediction for LTE and Upcoming 5G Networks using Passive Downlink Indicators.
In
2018 IEEE 88th IEEE Vehicular Technology Conference (VTC-Fall),
Chicago, USA,
2018.
|
| Heimann/etal/2018a |
Heimann, Karsten and Tiemann, Janis and Böcker, Stefan and Wietfeld, Christian.
On the Potential of 5G mmWave Pencil Beam Antennas for UAV Communications: An Experimental Evaluation.
In
22nd International ITG Workshop on Smart Antennas (WSA 2018),
2018.
|
| Molina/etal/2018a |
Molina, Alejandro and Munteanu, Alexander and Kersting, Kristian.
Core Dependency Networks.
In
Proceedings of the 32nd AAAI Conference on Artificial Intelligence (AAAI),
2018.
|
| Monhof/etal/2018a |
Stefan Monhof and Marcus Haferkamp and Benjamin Sliwa and Christian Wietfeld.
Payload-size and deadline-aware scheduling for upcoming 5G networks: Experimental validation in high-load scenarios.
In
2018 IEEE 88th IEEE Vehicular Technology Conference (VTC-Fall),
Chicago, USA,
2018.
|
| Monhof/etal/2018b |
Stefan Monhof and Stefan Böcker and Janis Tiemann and Christian Wietfeld.
Cellular Network Coverage Analysis and Optimization in Challenging Smart Grid Environments.
In
2018 IEEE International Conference on Communications, Control, and Computing Technologies for Smart Grids (SmartGridComm),
Aalborg, Denmark,
IEEE,
2018.
|
| Pillmann/etal/2018a |
Johannes Pillmann and Benjamin Sliwa and Christian Wietfeld.
The autoMat CVIM - A scalable data model for automotive big data marketplaces.
In
19th IEEE International Conference on Mobile Data Management (MDM),
Aalborg, Denmark,
2018.
|
| Pillmann/etal/2018b |
Johannes Pillmann and Daniel Behnke and Benjamin Sliwa and Matthias Priebe and Christian Wietfeld.
Efficient and reliable car-to-cloud data transfer empowered by BBR-enabled network coding.
In
2018 IEEE 88th IEEE Vehicular Technology Conference (VTC-Fall),
Chicago, USA,
2018.
|
| Sliwa/etal/2018a |
Sliwa, Benjamin and Liebig, Thomas and Falkenberg, Robert and Pillmann, Johannes and Wietfeld, Christian.
Efficient machine-type communication using multi-metric context-awareness for cars used as mobile sensors in upcoming 5G networks.
In
Proceedings of the 87th Vehicular Technology Conference: VTC2018-Spring,
IEEE,
2018.
|
| Sliwa/etal/2018b |
Benjamin Sliwa and Marcus Haferkamp and Manar Al-Askary and Christian Wietfeld.
A radio-fingerprinting-based vehicle classification system for intelligent traffic control in smart cities.
In
2018 Annual IEEE International Systems Conference (SysCon),
Vancouver, Canada,
IEEE,
2018.
|
| Sliwa/etal/2018c |
Benjamin Sliwa and Thomas Liebig and Robert Falkenberg and Johannes Pillmann and Christian Wietfeld.
Machine learning based context-predictive car-to-cloud communication using multi-layer connectivity maps for upcoming 5G networks.
In
2018 IEEE 88th IEEE Vehicular Technology Conference (VTC-Fall),
Chicago, USA,
2018.
|
| Sliwa/etal/2018d |
Benjamin Sliwa and Thomas Liebig and Robert Falkenberg and Johannes Pillmann and Christian Wietfeld.
Resource-efficient transmission of vehicular sensor data using context-aware communication.
In
19th IEEE International Conference on Mobile Data Management (MDM),
Aalborg, Denmark,
2018.
|
| Sliwa/etal/2018e |
Benjamin Sliwa and Nico Piatkowski and Marcus Haferkamp and Dennis Dorn and Christian Wietfeld.
Leveraging the channel as a sensor: Real-time vehicle classification using multidimensional radio-fingerprinting.
In
2018 IEEE 21st International Conference on Intelligent Transportation Systems (ITSC),
Maui, Hawaii, USA,
2018.
|
| Sliwa/etal/2018f |
Benjamin Sliwa and Johannes Pillmann and Maximilian Klaß and Christian Wietfeld.
Exploiting map topology knowledge for context-predictive multi-interface car-to-cloud communication.
In
2018 IEEE 88th IEEE Vehicular Technology Conference (VTC-Fall),
Chicago, USA,
2018.
|
| Tiemann/etal/2018a |
Janis Tiemann and Ole Feldmeier and Christian Wietfeld.
Supporting Maritime Search and Rescue Missions through UAS-based Wireless Localization.
In
IEEE Global Communications Conference Workshops (GLOBECOM Workshops), The 9th International Workshop on Wireless Networking and Control of Unmanned Autonomous Vehicles (Wi-UAV),
Abu Dhabi, United Arab Emirates,
IEEE,
2018.
|
| Vranken/etal/2018a |
Tim Vranken and Benjamin Sliwa and Christian Wietfeld and Michael Schreckenberg.
Performance comparison of dynamic vehicle routing methods for minimizing the global dwell time in upcoming smart cities.
In
2018 IEEE 88th IEEE Vehicular Technology Conference (VTC-Fall),
Chicago, USA,
2018.
|
| Becker/etal/2017a |
Becker, Merlin and Habel, Lars and Schreckenberg, Michael.
Analytical Method for the Precise and Fast Prediction of Railway Running Times.
In
IEEE 5th Conference on Models and Technologies for Intelligent Transportation Systems (MT-ITS),
IEEE,
Naples, Italy,
2017.
|
| Bette/etal/2017a |
Bette, Henrik M. and Habel, Lars and Emig, Thorsten and Schreckenberg, Michael.
Mechanisms of jamming in the Nagel-Schreckenberg model for traffic flow.
In
Physical Review E,
Vol. 95,
No. 012311,
2017.
|
| Haferkamp/etal/2017a |
Marcus Haferkamp and Benjamin Sliwa and Christoph Ide and Christian Wietfeld.
Payload-Size and Deadline-Aware Scheduling for Time-critical Cyber Physical Systems.
In
Wireless Days 2017,
Porto, Portugal,
2017.
|
| Haferkamp/etal/2017c |
Marcus Haferkamp and Manar Al-Askary and Dennis Dorn and Benjamin Sliwa and Lars Habel and Michael Schreckenberg and Christian Wietfeld.
Radio-based Traffic Flow Detection and Vehicle Classification for Future Smart Cities.
In
IEEE Vehicular Technology Conference (VTC-Spring) Workshop on Connecting All Things for Enabling Smart Cities (CONTEST),
Sydney,
2017.
|
| Krause/etal/2017a |
Krause, Sebastian M. and Habel, Lars and Guhr, Thomas and Schreckenberg, Michael.
The importance of antipersistence for traffic jams.
In
Europhysics Letters (EPL),
Vol. 118,
No. 38005,
2017.
|
| Mladenov/etal/2017b |
Mladenov, Martin and Belle, Vaishak and Kersting, Kristian.
The Symbolic Interior Point Method.
In
Satinder Singh and Shaul Markovitch (editors),
Proceedings of the 31st AAAI Conference on Artificial Intelligence (AAAI),
AAAI Press,
2017.
|
| Molina/etal/2017a |
Molina, Alejandro and Natarajan, Sriraam and Kersting, Kristian.
Poisson Sum-Product Networks: A Deep Architecture for Tractable Multivariate Poisson Distributions.
In
Proceedings of the 31st AAAI Conference on Artificial Intelligence (AAAI),
pages 2357--2363,
2017.
|
| Pillmann/etal/2017a |
Johannes Pillmann and Benjamin Sliwa and Jens Schmutzler and Christoph Ide and Christian Wietfeld.
Car-To-Cloud Communication Traffic Analysis Based on the Common Vehicle Information Model.
In
IEEE Vehicular Technology Conference (VTC-Spring),
2017.
|
| Pillmann/etal/2017b |
Johannes Pillmann and Benjamin Sliwa and Christian Kastin and Christian Wietfeld.
Empirical evaluation of predictive channel-aware transmission for resource efficient car-to-cloud communication.
In
IEEE Vehicular Networking Conference (VNC),
Torino, Italy,
2017.
|
| Pillmann/etal/2017c |
Johannes Pillmann and Christian Wietfeld and Adrian Zarcula and Thomas Raugust and Daniel Calvo Alonso.
Novel Common Vehicle Information Model (CVIM) for Future Automotive Vehicle Big Data Marketplaces.
In
IEEE Intelligent Vehicles Symposium.,
2017.
|
| Sliwa/etal/2017a |
Benjamin Sliwa and Robert Falkenberg and Christian Wietfeld.
A Simple Scheme for Distributed Passive Load Balancing in Mobile Ad-hoc Networks.
In
IEEE Vehicular Technology Conference (VTC-Spring),
Sydney,
2017.
|
| Sliwa/etal/2017b |
Benjamin Sliwa and Johannes Pillmann and Fabian Eckermann and Christian Wietfeld.
LIMoSim: A lightweight and integrated approach for simulating vehicular mobility with OMNeT++.
In
OMNeT++ Community Summit 2017,
Bremen, Germany,
2017.
|
| Sliwa/etal/2017c |
Sliwa, Benjamin and Pillmann, Johannes and Eckermann, Fabian and Habel, Lars and Schreckenberg, Michael and Wietfeld, Christian.
Lightweight joint simulation of vehicular mobility and communication with LIMoSim.
In
IEEE Vehicular Networking Conference (VNC),
Torino, Italy,
2017.
|
| Habel/etal/2015a |
Habel, Lars and Molina, Alejandro and Zaksek, Thomas and Kersting, Kristian and Schreckenberg, Michael.
Traffic simulations with empirical data -- How to replace missing traffic flows?.
In
Knoop, Victor L. and Daamen, Winnie (editors),
Traffic and Granular Flow '15,
pages 491-498,
Springer,
2016.
|
| Habel/etal/2016a |
Habel, Lars and Ide, Christoph and Wietfeld, Christian and Schreckenberg, Michael.
Improving Vehicular Traffic Simulations Using Real-Time Information on Environmental Conditions.
In
IEEE Vehicular Technology Conference (VTC Fall),
IEEE,
Montreal, Canada,
IEEE,
2016.
|
| Habel/Schreckenberg/2016a |
Habel, Lars and Schreckenberg, Michael.
Analysis of Asymmetric Lane Changing in a CA-Based Highway Traffic Model.
In
Journal of Cellular Automata,
Vol. 11,
No. 4,
pages 351-361,
2016.
|
| Ide/etal/2016a |
Christoph Ide and Robert Falkenberg and Dennis Kaulbars and Christian Wietfeld.
Empirical Analysis of the Impact of LTE Downlink Channel Indicators on the Uplink Connectivity.
In
IEEE Vehicular Technology Conference (VTC-Spring),
IEEE,
Nanjing, China,
2016.
|
| Mladenov/etal/2016a |
Mladenov, Martin and Heinrich, Danny and Kleinhans, Leonard and Gonsior, Felix and Kersting, Kristian.
RELOOP: A Python-Embedded Declarative Language for Relational Optimization.
In
Working Notes of the First AAAI Workshop on Declarative Learning Based Programming (DeLBP),
AAAI Press,
2016.
|
| Niehoefer/etal/2016a |
Niehöfer, Brian and Schweikowski, Florian and Wietfeld, Christian.
LOcal interferenCe compensATion (LOCATe) for GNSS-based Lane-Specific Positioning of Vehicles.
In
IEEE Vehicular Technology Conference (VTC-Spring),
IEEE,
Nanjing, China,
2016.
|
| Sliwa/etal/2016a |
Benjamin Sliwa and Christoph Ide and Christian Wietfeld.
An OMNeT++ based Framework for Mobility-aware Routing in Mobile Robotic Networks.
In
OMNeT++ Community Summit 2016,
2016.
|
| Sliwa/etal/2016b |
Sliwa, Benjamin and Behnke, Daniel and Ide, Christoph and Wietfeld, Christian.
B.A.T.Mobile: Leveraging mobility control knowledge for efficient routing in mobile robotic networks.
In
IEEE GLOBECOM 2016 Workshop on Wireless Networking, Control and Positioning of Unmanned Autonomous Vehicles (Wi-UAV),
Washington D.C., USA,
IEEE,
2016.
|
| Tiemann/etal/2016a |
Janis Tiemann and Johannes Pillmann and Stefan Böcker and Christian Wietfeld.
Ultra-wideband Aided Precision Parking for Wireless Power Transfer to Electric Vehicles in Real Life Scenarios.
In
IEEE Vehicular Technology Conference (VTC-Fall),
IEEE,
Montréal, Canada,
2016.
|
| Yang/etal/2016a |
Yang, Shuo and Khot, Tushar and Kersting, Kristian and Natarajan, Sriraam.
Learning Continuous-Time Bayesian Networks in Relational Domains: A Non-Parametric Approach.
In
Proceedings of the 30th AAAI Conference on Artificial Intelligence (AAAI),
AAAI Press,
2016.
|
| Zaksek/Schreckenberg/2016a |
Zaksek, Thomas and Schreckenberg, Michael.
Fractal Analysis Of Empirical And Simulated Traffic Time Series.
In
Knoop, Victor L. and Daamen, Winnie (editors),
Traffic and Granular Flow '15,
Springer,
2016.
|
| Hadiji/etal/2015b |
Hadiji, Fabian and Molina, Alejandro and Natarajan, Sriraam and Kersting, Kristian.
Poisson Dependency Networks: Gradient Boosted Models for Multivariate Count Data.
In
Machine Learning Journal (MLJ),
Vol. 100,
No. 2,
pages 477-507,
2015.
|
| Ide/etal/2015a |
Ide, Christoph and Hadiji, Fabian and Habel, Lars and Molina, Alejandro and Zaksek, Thomas and Schreckenberg, Michael and Kersting, Kristian. and Wietfeld, Christian.
LTE Connectivity and Vehicular Traffic Prediction based on Machine Learning Approaches.
In
IEEE 82nd Vehicular Technology Conference (VTC-Fall),
Boston, USA,
2015.
|
| Ide/etal/2015b |
Ide, Christoph and Nick, Michael and Kaulbars, Dennis and Wietfeld, Christian.
Forecasting Cellular Connectivity for Cyber-Physical Systems: A Machine Learning Approach.
In
Conference on Machine Learning for Cyber Physical Systems and Industry 4.0 (ML4CPS),
Lemgo, Germany,
2015.
|
| Ide/etal/2015c |
Ide, Christoph and Dusza, Bjoern and Wietfeld, Christian.
Client-based control of the interdependence between LTE MTC and human data traffic in vehicular environments.
In
IEEE Transactions on Vehicular Technology,
Vol. 64,
No. 5,
pages 1856-1871,
IEEE,
2015.
|
| Kaulbars/etal/2015a |
Kaulbars, D. and Schweikowski, F. and Wietfeld, C..
Spatially Distributed Traffic Generation for Stress Testing the Robustness of Mission-Critical Smart Grid Communication.
In
Accepted for presentation at IEEE GLOBECOM 2015 Workshop on SmartGrid Resilience,
San Diego, USA,
2015.
|
| Habel/Schreckenberg/2014a |
Habel, Lars and Schreckenberg, Michael.
Asymmetric Lane Change Rules for a Microscopic Highway Traffic Model.
In
Proc. of 11th International Conference on Cellular Automata for Research and Industry (ACRI),
Vol. 8751,
pages 620--629,
Krakow, Poland,
Springer,
2014.
|
| Haegerling/etal/2014a |
Hägerling, Christian and Ide, Christoph and Wietfeld, Christian.
Coverage and Capacity Analysis of Wireless M2M Technologies for Smart Distribution Grid Services.
In
accpeted for publication at IEEE SmartGridComm,
Venice, Italy,
2014.
|
| Ide/etal/2014a |
Ide, Christoph and Habel, Lars and Knaup, Timo and Schreckenberg, Michael and Wietfeld, Christian.
Interaction between Machine-Type Communication and H2H LTE Traffic in Vehicular Environments.
In
Proc. of IEEE 79th Vehicular Technology Conference (VTC-Spring),
Seoul, Korea,
2014.
|
| Ide/etal/2014b |
Ide, Christoph and Piontek, Kai and Wietfeld, Christian.
Identifying LTE Connectivity Hot Spots in Vehicular Environments: A Learning Approach.
In
GI/ITG KuVs Fachgespräch Inter-Vehicle Communication,
Luxembourg City, Luxembourg,
2014.
|
| Liou/etal/2014a |
Liou, Ren-Huang and Lin, Yi-Bing and Sung, Yingrong Coral and Liu, Pang-Cheng and Wietfeld, Christian.
Performance of CS Fallback for Long Term Evolution Mobile Network.
In
accepted for IEEE Transactions on Vehicular Technology,
2014.
|
| Liou/etal/2014b |
Liou, Ren-Huang and Ide, Christoph and Dusza, Bjoern and Wietfeld, Christian.
QoE-Aware LTE Radio Link Control Parameters for Voice over IP in Vehicular Environments.
In
IEEE 79th Vehicular Technology Conference (VTC-Spring),
Seoul, Korea,
2014.
|
| Niehoefer/etal/2014a |
Niehoefer, Brian and Schweikowski, Florian and Lehnhausen, Sarah and Wietfeld, Christian.
Cloud-aided SDR Solution for Lane-Specific Vehicle Positioning via Local Interference Compensation.
In
Proc. of IEEE Aerospace Conference (AEROSPACE),
Big Sky, USA,
2014.
|
| Rohde/etal/2014a |
Rohde, Sebastian and Ide, Christoph and Kolanczyk, Tim and Wietfeld, Christian.
Local Overload Compensation through LTE System Level Interference Control in Realistic Scenarios.
In
IEEE 79th Vehicular Technology Conference (VTC-Spring),
Seoul, Korea,
2014.
|
| Wietfeld/etal/2014a |
Wietfeld, Christian and Ide, Christoph and Dusza, Bjoern.
Resource Efficient Mobile Communications for Crowd-Sensing.
In
Proceedings of 51st ACM/EDAC/IEEE Design Automation Conference (DAC),
pages 1-6,
San Francisco, USA,
IEEE,
2014.
|
| Dusza/etal/2013a |
Dusza, Bjoern and Ide, Christoph and Cheng, Liang and Wietfeld, Christian.
An Accurate Measurement-Based Power Consumption Model for LTE Uplink Transmissions.
In
Proc. of IEEE INFOCOM (Poster),
Turin, Italy,
IEEE,
2013.
|
| Dusza/etal/2013b |
Dusza, Bjoern and Ide, Christoph and Boek, Patrick-Benjamin and Wietfeld, Christian.
Optimized Cross-Layer Protocol Choices for LTE in High-Speed Vehicular Environments.
In
Proc. of the 9th IEEE International Wireless Communications and Mobile Computing Conference (IWCMC 2013),
Cagliari, Italy,
2013.
|
| Dusza/etal/2013c |
Dusza, Bjoern and Ide, Christoph and Wietfeld, Christian.
Quantitative Bewertung des Einflusses von Kontext- und Systemparametern auf die Batterie-Laufzeit von LTE Endgeräten.
In
Proc. of the 18th VDE/ITG Fachtagung Mobilkommunikation,,
Osnabrück, Germany,
VDE press,
2013.
|
| Dusza/etal/2013d |
Dusza, Bjoern and Ide, Christoph and Cheng, Liang and Wietfeld, Christian.
CoPoMo: A Context-Aware Power Consumption Model for LTE User Equipment.
In
Transactions on Emerging Telecommunications Technologies (ETT),
Vol. 24,
No. 6,
pages 615-632,
Wiley,
2013.
|
| Ide/etal/2013a |
Ide, Christoph and Kurtz, Fabian and Wietfeld, Christian.
Cluster-Based Vehicular Data Collection for Efficient LTE Machine-Type Communication.
In
IEEE 78th Vehicular Technology Conference (VTC-Fall),
Las Vegas, USA,
IEEE,
2013.
|
| Ide/etal/2013b |
Ide, Christoph and Dusza, Bjoern and Wietfeld, Christian.
Performance of Channel-Aware M2M Communications based on LTE Network Measurements.
In
24th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC),
London, UK,
2013.
|
| Niehoefer/etal/2013a |
Niehoefer, Brian and Subik, Sebastian and Wietfeld, Christian.
The CNI Open Source Satellite Simulator based on OMNeT++.
In
6th OMNeT++ Workshop,
Cannes, France,
2013.
|
| Niehoefer/etal/2013b |
Niehoefer, Brian and Schweikowski, Florian and Wietfeld, Christian.
Smart Constellation Selection for Precise Vehicle Positioning in Urban Canyons using a Software-Defined Receiver Solution.
In
20th Symposium on Communications and Vehicular Technology,
Namur, Belgium,
2013.
|
| Dusza/etal/2012b |
Dusza, Björn and Ide, Christoph and Wietfeld, Christian.
Interference Aware Throughput Measurements for Mobile WiMAX over Vehicular Radio Channels.
In
Proc. of the IEEE Wireless Communications and Networking Conference (WCNC) Workshop on Wireless Vehicular Communications and Networks (WVCN),
Paris, France,
IEEE,
2012.
|
| Dusza/etal/2012c |
Dusza, Bjoern and Ide, Christoph and Wietfeld, Christian.
Utilizing Unused Network Capacity for Battery Lifetime Extension of LTE Devices.
In
Proc. of the IEEE International Conference on Communications (ICC),
Ottawa, Canada,
IEEE,
2012.
|
| Ide/etal/2012a |
Ide, Christoph and Dusza, Bjoern and Wietfeld, Christian.
Energy Efficient LTE-Based Floating Car Data Collection for Dynamic Traffic Forecasts.
In
Proc. of the IEEE International Conference on Communications (ICC),
Ottawa, Canada,
IEEE,
2012.
|
| Ide/etal/2012b |
Ide, Christoph and Dusza, Bjoern and Putzke, Markus and Mueller, Christian and Wietfeld, Christian.
Influence of M2M Communication on the Physical Resource Utilization of LTE.
In
Proc. of the 11th Wireless Telecommunications Symposium (WTS 2012),
London, UK,
IEEE,
2012.
|
| Ide/etal/2012c |
Ide, Christoph and Dusza, Bjoern and Putzke, Markus and Wietfeld, Christian.
Channel Sensitive Transmission Scheme for V2I-based Floating Car Data Collection via LTE.
In
Proc. of IEEE International Conference on Communications (ICC),
pages 7151-7156,
Ottawa, Canada,
IEEE,
2012.
|
| Ide/etal/2012d |
Ide, Christoph and Knaup, Timo and Niehoefer, Brian and Weber, Daniel and Habel, Lars and Schreckenberg, Michael and Wietfeld, Christian.
Efficient Floating Car Data Transmission via LTE for Travel Time Estimation of Vehicles.
In
Proc. of IEEE 76th Vehicular Technology Conference (VTC-Fall),
pages 1-5,
Québec City, Canada,
IEEE,
2012.
|
| Ide/etal/2012e |
Ide, Christoph and Duzsa, Bjoern and Wietfeld, Christian.
Performance Evaluation of V2I-Based Channel Aware Floating Car Data Transmission via LTE.
In
15th International IEEE Conference on Intelligent Transportation Systems - ITSC,
Anchorage, USA,
IEEE,
2012.
|
| Niehoefer/etal/2012a |
Niehoefer, Brian and Lehnhausen, Sarah and Wietfeld, Christian.
Optimizing-Strategies for a Time-Efficient Evaluation of Position-Specific Communication Aspects in Disaster Relief Scenarios.
In
Proc. of IEEE 1st AESS European Conference on European Satellite Telecommunications (ESTEL),
pages 1-6,
Rome, Italy,
IEEE,
2012.
|
| Niehoefer/etal/2012b |
Niehoefer, Brian and Lehnhausen, Sarah and Wietfeld, Christian.
Combined Analysis of Local Ionospheric and Multipath Effects for Lane-Specific Positioning of Vehicles within Traffic Streams.
In
Proc. of 6th ESA Workshop on Satellite Navigation Technologies (NaviTech),
Noordwijk, The Netherlands,
2012.
|
| Ide/etal/2011a |
Ide, Christoph and Dusza, Bjoern and Wietfeld, Christian.
Mobile WiMAX Performance Measurements with Focus on Different QoS Targets.
In
LANMAN,
IEEE,
2011.
|
| Maschek/etal/2011a |
Maschek,Thomas and Konrad, Benedikt and Deuse, Jochen and Hermanns, Gerhard and Weber, Daniel and Schreckenberg, Michael.
Verkehrsforschung in der Produktionsflussanalyse - Übertragung von Modellen der statistischen Physik auf die Analyse von Produktionssystemen.
In
ZWF - Zeitung für wirtschaftlichen Fabrikbetrieb,
Vol. 106,
No. 11,
pages 833--837,
2011.
|
| Niehoefer/etal/2011a |
Niehoefer, Brian and Lewandowski, Andreas and Wietfeld, Christian.
Evaluation of the Localization Accuracy of Satellite Systems for Traffic Flow Predictions.
In
ION GNSS 2011,
2011.
|
| Vranken/2022a |
Vranken, Tim.
Verkehrsdynamik unter dem Einfluss automatisierter Fahrzeuge.
Universität Duisburg-Essen,
2022.
|
| Sliwa/2021a |
Benjamin Sliwa.
Resource-Efficient Vehicle-to-Cloud Communications Leveraging Machine Learning.
TU Dortmund,
2021.
|
| Niehoefer/2016a |
Brian Niehöfer.
Modellbasierte Interferenzkompensation für die satellitengestützte Ortung in urbanen Szenarien.
TU Dortmund,
2016.
|
| Ide/2015a |
Ide, Christoph.
Resource-Efficient LTE Machine-Type Communication in Vehicular Environments.
2015.
|
| Lewandowski/etal/2010a |
Lewandowski, A. and Niehöfer, B. and Wietfeld, C..
Galileo Search-and-Rescue: Performance Aspects and new Service Capabilities.
In
International Journal on Satellite Communication and Networking, Special Issue: Emergency and Disaster Communication Systems Via Satellite,
Wiley,
2010.
|
| Lewandowski/Wietfeld/2010a |
Lewandowski , A. and Wietfeld , C..
A comprehensive Approach for optimizing ToA- Localization in harsh Industrial Environments.
In
IEEE Position, Location and Navigation Symposium (PLANS), Indian Wells, CA,
Vol. 1,
pages 1-10,
IEEE,
2010.
|
| Niehoefer/etal/2009a |
B. Niehöfer and R. Burda and C. Wietfeld and F. Bauer and O. Lüert.
GPS Community Map Generation for Enhanced Routing Methods based on Trace-Collection by Mobile Phones.
In
1st International Conference on Advances in Satellite and Space Communications (SPACOMM), Colmar (ausgezeichnet mit einem Best Paper Award),
pages 156 - 161,
2009.
|
| Lewandowski/etal/2008a |
Lewandowski, A. and Burda, R. and Subik, S. and Wietfeld, C..
A Multiscale Simulation Environment for Performance Evaluation of high reliable heterogeneous Communication Networks.
In
European Simulation and Modelling Conference (ESM),
Le Havre, France,
2008.
|
| Michaelis/etal/2008b |
Michaelis, Stefan and Lewandowski, Andreas and Daniel, Kai and Yousaf, Zarrar and Wietfeld, Christian.
A comprehensive mobility management solution for handling peak load in cellular network scenarios.
In
6th ACM International Symposium on Mobility Management and Wireless Access (MobiWac),
Vancouver,
2008.
|
| Yousaf/etal/2008c |
Yousaf , F. Zarrar and Bauer , C. and Wietfeld , C..
An Accurate and Extensible Mobile IPv6 (xMIPV6) Simulation Model for OMNeT++.
In
1st International Conference on Simulation Tools and Techniques for Communications, Networks and Systems (SIMUTools), Marseille, France,
pages 1-8,
ACM/ICST,
2008.
|
| Selten/etal/2007a |
R. Selten and T. Chmura and T. Pitz and S. Kube and M. Schreckenberg.
Commuters Route Choice Behaviour.
In
Games and Economic Behavior,
Vol. 58,
No. 2,
pages 394 - 406,
2007.
|
| Wolff/etal/2007a |
Wolff , A. and Michaelis , S. and Schmutzler , J. and Wietfeld , C..
Network-centric Middleware for Service Oriented Architectures across Heterogeneous Embedded Systems.
In
11th International IEEE EDOC Conference, Middleware for Web Services Workshop,
Vol. 1,
pages 105-108,
Annapolis, MD, USA,
IEEE,
2007.
|
| Weber/etal/2006a |
D. Weber and R. Chrobok and S. Hafstein and F. Mazur and A. Pottmeier and M. Schreckenberg.
OLSIM: Inter-Urban Traffic Information.
In
T. Böhme and V.M. Larios Rosillo and H. Unger and H. Unger (editors),
Innovative Internet Community Systems,
pages 296-306,
Springer,
2006.
|
| Chrobok/2005a |
Chrobok, R..
Theory and Application of Advanced Traffic Forecast Methods.
Dissertation, Universität Duisburg-Essen,
2005.
|
| Hafstein/etal/2004a |
S. F. Hafstein and R. Chrobok and A. Pottmeier and M. Schreckenberg and F. Mazur.
A High-Resolution Cellular Automata Traffic Simulation Model with Application in a Freeway Traffic Information System.
In
Computer-Aided Civil and Infrastructure Engineering,
Vol. 19,
No. 5,
pages 338-350,
2004.
|
| Selten/etal/2004a |
R. Selten and M. Schreckenberg and T. Chmura and T. Pitz and S. Kube and S.F. Hafstein and R. Chrobok, A. Pottmeier and J. Wahle.
Experimental Investigation of Day-to-Day Route-Choice Behavior and Network Simulations of Autobahn Traffic in North Rhine-Westphalia.
In
R. Selten and M. Schreckenberg (editors),
Human Behaviour and Traffic Networks,
pages 1-21,
Springer,
2004.
|
