Dr.-Ing. Svilen Ivanov

Former Assistant

Otto-von-Guericke-University Magdeburg

| 2013 | 2012 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 |

2013

Svilen Ivanov, Edgar Nett
Localization-Based Radio Model Calibration for Fault-Tolerant Wireless Mesh Networks
Industrial Informatics, IEEE Transactions on , vol.9, no.1, pp.246-253, Feb. 2013

2012

Svilen Ivanov, Edgar Nett
Achieving Fault-Tolerant Network Topology in Wireless Mesh Networks (Buchkapitel)
Wireless Mesh Networks - Efficient Link Scheduling, Channel Assignment and Network Planning Strategies, ISBN: 978-953-51-0672-2 ; DOI: 10.5772/50173
http://www.intechopen.com/articles/show/title/achieving-fault-tolerant-network-topology-in-wireless-mesh-networks
Svilen Ivanov, Edgar Nett
Using Localization for Fault-tolerant Radio Coverage in Wireless Mesh Networks
In Proceedings of 26th IEEE International Parallel and Distributed Processing Symposium (IPDPS 2012), 17th IEEE Workshop on Dependable Parallel, Distributed and Network-Centric Systems (DPDNS 2012), Shanghai, China, 21-25. Mai 2012

2010

Svilen Ivanov and Edgar Nett
Fault-tolerant Base Station Planning ofWireless Mesh Networks in Dynamic Industrial Environments
In Proceedings of the IEEE International Conference 2010 - Emerging Technologies and Factory Automation, 13 - 16 Semptember, 2010, Bilbao, Spain
Svilen Ivanov, Scholz R., Schemmer S. and Schumann R.
Informationssicherheit mit Standardtechnologien: Referenzmodell für risikobasierte Maßnahmenauswahl
atp edition -- Automatisierungstechnische Praxis *7-8*, 222--225.
Svilen Ivanov and Adamczyk, H.
Lebenszyklusorientiertes Risikomanagement in COTS-basierten Systemen
in VDI-Expertenforum "IT Security in der Automation - Verstehen und Handeln!", Frankfurt, Germany
Svilen Ivanov, Scholz R., Schemmer S. and Schumann R.
Security in der drahtlosen Automatisierung: Ein Referenzmodell hilft bei der risikobasierten Maßnahmenauswahl
in VDI Kongress Automation, Baden-Baden, Germany

2009

Georg Lukas, André Herms, Svilen Ivanov, E. Nett
Dependable Wireless Mesh Networks: An integrated approach
International Journal of parallel, Emergent and Distributed Systems, April 2, 2009
Volume 24, Issue 2 April 2009, pages 151-169
Wireless Mesh Networks (WMNs) are gaining popularity in many application areas because of their low cost and high flexibility. Technically, a WMN forms a distributed network-centric system which aims to provide communication services to the application layer, but has no built-in dependability provisions. To make the network dependable, many problems have to be solved on different layers. With this paper, we describe our ongoing work to provide an integrated solution to increase the dependability of WMNs. Our approach combines network coverage planning on the physical layer, bandwidth management on the link layer and live network monitoring to improve the reliability, availability and maintainability of a WMN. We provide fine-grained means to improve the predictability of the network components, thus making the WMN more dependable. In this paper, we present first results of our work, and describe how they are interleaved.
@article{cite:Lukas2009,
  author = {Georg Lukas and Andr{\'e} Herms and Svilen Ivanov and Edgar Nett},
  title = {{Dependable Wireless Mesh Networks: An Integrated Approach}},
  journal = {International Journal of Parallel, Emergent and Distributed Systems},
  year = {2009},
  month = {April},
  volume = {24},
  number = {2},
  pages = {1--21},
  url = {http://ivs.cs.uni-magdeburg.de/EuK/forschung/publikationen/pdf/2009/ijpeds\_lhin2009.pdf},
  doi = {10.1080/17445760802544086}
}

2008

Georg Lukas, André Herms, Svilen Ivanov, E. Nett
An Integrated Approach for Reliability and Dependability of Wireless Mesh Networks
13th IEEE Workshop on Dependable Parallel, Distributed and Network-Centric Systems DPDNS '08, 2008
Wireless Mesh Networks (WMNs) are gaining popularity in many application areas because of their low cost and high flexibility. Technically, a WMN forms a distributed network-centric system which aims to provide communication services to the application layer, but has no built-in dependability provisions. To make the network dependable, many problems have to be solved on different layers. With this paper, we describe our ongoing work to provide an integrated solution to increase the dependability of WMNs. Our approach combines network coverage planning on the physical layer, bandwidth management on the link layer and live network monitoring to improve the reliability, availability and maintainability of a WMN. We provide fine-grained means to improve the predictability of the network components, thus making the WMN more dependable. In this paper, we present first results of our work, and describe how they are interleaved.
@inproceedings{cite:LHIN2008,
  author = {Georg Lukas and Andr{\'e} Herms and Svilen Ivanov and Edgar Nett},
  title = {An Integrated Approach for Reliability and Dependability of Wireless Mesh Networks},
  booktitle = {13th IEEE Workshop on Dependable Parallel, Distributed and Network-Centric Systems DPDNS '08},
  year = {2008},
  url = {http://ivs.cs.uni-magdeburg.de/EuK/forschung/publikationen/pdf/2008/dependable_wmn_camera_ready.pdf}
}
Svilen Ivanov, E. Nett, Stefan Schemmer
Automatic WLAN Localization for Industrial Automation
in '7th IEEE International Workshop on Factory Communication Systems (WFCS 2008), May 20-23, 2008, Dresden, Germany'.
[PDF]
Georg Lukas, E. Nett, Svilen Ivanov
Distributed Event Synconization for Diagnosing Wireless Mesh Networks
Int. Workshop on Dependable Network Computing and Mobile Systems (DNCMS 08); Naples, Italy, October 5th, 2008
in conjunction with the 27th IEEE Int. SRDS 2008 
@inproceedings{cite:Lukas2008,
  author = {Georg Lukas AND Edgar Nett AND Svilen Ivanov},
  title = {{Distributed Event Synchronization for Diagnosing Wireless Mesh Networks}},
  booktitle = {{Proceedings of the International Workshop on Dependable Network Computing and Mobile Systems, DNCMS'08}},
  year = {2008},
  url = {http://ivs.cs.uni-magdeburg.de/EuK/forschung/publikationen/pdf/2008/dncms08-enett.pdf}
}
Svilen Ivanov, E. Nett
Fault-Tolerant Coverage Planning in Wireless Networks
27th IEEE Int. Symposium on Reliable Distributed Sytems (SRDS), Naples, Italy, October 6-8, 2008
ISBN: 978-0-7695-3410-7 Seiten 175-184
[PDF]
Svilen Ivanov, E. Nett, André Herms
Feedback-controlled WLAN: Achieving Channel-Availability in Mesh Networks
in '7th IEEE International Symposium on Network Computing and Applications (IEEE NCA08), 10 - 12 July, Cambridge, MA USA'.
[PDF]
Svilen Ivanov, Georg Lukas, Stefan Schemmer
Monitoring and Diagnosis for Wireless Real-Time Applications
10. Wirless Technologies Kongresses 2008, Bochum 22-23.09.2008,
ISBN 978-3-89838-608-1, 158-166 
@inproceedings{Lukas2008,
  author = {Georg Lukas and Svilen Ivanov and Stefan Schemmer},
  title = {{Monitoring and Diagnosis for Wireless Real-Time Applications}},
  booktitle = {10. Wirless Technologies Kongresses 2008, Bochum},
  year = {2008}
}

2007

André Herms, Georg Lukas, Svilen Ivanov, Stefan Schemmer
Echtzeitfähigkeit für Mesh-Netzwerke in der Automatisierung
SPS/IPC/Drives 2007, Elektrische Automatisierung - Systeme und Komponenten, Nürnberg, 27.- 29.11.2007
ISBN:978-3-8007-3069-8
Wireless LANs (IEEE 802.11) are increasingly used in industrial applications. Theyreduce cabling costs, increase flexibility and enable mobile applications for maintenance or logistics tasks. Mesh networks provide a self-configuring and - healing wireless backbone for large scale deployments (e.g. in process automation). This paper presents a routing algorithm which provides QoS in wireless mesh networks, thus leveraging their use in industrial applications. It allows reserving bandwidth for real-time flows based on measurements of the physically available bandwidth. Thus it fully utilizes the bandwidth while still preventing congestion. Simulation results demonstrate the reliability of the algorithm and its advantage over previous works.
@inproceedings{cite:Herms2007b,
  author = {Andr{\'e} Herms and Stefan Schemmer and Georg Lukas},
  title = {{Echtzeitfähigkeit für Mesh-Netzwerke in der Automatisierung}},
  booktitle = {Proceedings of {SPS/IPC/DRIVES, Elektrische Automatisierung, Systeme und Komponenten} '07},
  address = {Nurenberg, Germany},
  year = {2007},
  month = {November},
  url = {http://ivs.cs.uni-magdeburg.de/EuK/forschung/publikationen/pdf/2007/sps2007-schemmer_v1.pdf}
}
Svilen Ivanov, André Herms, Georg Lukas
Experimental Validation of the ns-2 Wireless Model using Simulation, Emulation, and Real Network
In Proceedings of the 4th Workshop on Mobile Ad-Hoc Networks (WMAN'07) in conjunction with the 15th ITG/GI - Fachtagung Kommunikation in Verteilten Systemen (KiVS'07), 26. February - 2. March 2007 in Bern, Switzerland,
VDE Verlag, ISBN 978-3-8007-2980-7, pp. 433-444.
Wireless network research in the last years is often based on simulation.Ns-2 is a widely used wireless network simulation tool for this purpose.However, there are no published results about the accuracy of the ns-2 wireless model in the literature so far. In this paper we present a validation of the wireless model of ns-2 done by comparing the network characteristics of a simulated, an emulated, and a real wireless network. In order to show only the relevant differences, we have calibrated the radio propagation model of ns-2 to the real network and have used the same routing protocol implementation and the same application data traffic in all the compared networks. The results show that the packet delivery ratios, the connectivity graphs,and the packet latencies are represented in the model with an average error of 0.3 10 and 57% respectively. Based on these results we conclude that the packet delivery ratios, and network topologies are accurately represented in ns-2, once the simulation parameters are properly adjusted. The accuracy of the packet latencies is lower and therefore statements about latencies in the real network based on the simulation results have a lower validity. Based on these results we provide recommendations for future development of the ns-2.
@inproceedings{cite:Ivanov2007,
  author = {Svilen Ivanov and Andr{\'e} Herms and Georg Lukas},
  title = {{Experimental Validation of the {NS-2} Wireless Model using Simulation, Emulation, and Real Network}},
  booktitle = {Proceedings of the 4th Workshop on Mobile Ad-Hoc Networks (WMAN'07)},
  publisher = {VDE Verlag},
  year = {2007},
  month = {Feb. 26. -- March 2.},
  pages = {433 -- 444},
  url = {http://ivs.cs.uni-magdeburg.de/EuK/forschung/publikationen/pdf/2007/wman07magdeburg.pdf}
}
Svilen Ivanov, Stefan Schemmer
Lokalisierung im WLAN ? Neue Möglichkeiten und ihre Grenzen
9. Wirless Technologies Kongresses 2007, Stuttgart 18-19.09.2007
[PDF]
André Herms, Georg Lukas, Svilen Ivanov
Measurement-Based Detection of Interfering Neighbors for QoS in Wireless Mesh Networks
Mobile and Wireless Communications Summit, 2007. 16th IST, Budapest,Hungary 1-5 July 2007
ISBN:978-963-8111-66-1
Communication in wireless mesh networks based on the IEEE 802.11 WLAN standard is mainly governed by the carrier sensing based medium access. Knowledge about, which nodes influence each other, can improve the performance and is essential for QoS provision in terms of bandwidth guarantees. However, until now only approximations for the determination of station in carrier sense range are used. We present an exact solution by measuring the carrier sense in static wireless mesh networks. Simulation studies and measurements are done that verify the correctness of the protocol and reveal some significant properties of the carrier sense. It is shown that the carrier sense relation is neither strict nor symmetric in the general case, in opposite to the assumptions normally found in literature. We further conclude that for evaluation better simulation models are required that match these properties.
@inproceedings{cite:Herms2007,
  author = {Andr{\'e} Herms and Georg Lukas and Svilen Ivanov},
  title = {Measurement-Based Detection of Interfering Neighbors for {QoS} in Wireless Mesh Networks},
  booktitle = {16th IST Mobile and Wireless Communications Summit 2007, Proceedings of},
  year = {2007},
  url = {http://ivs.cs.uni-magdeburg.de/EuK/forschung/publikationen/pdf/2007/interf-mobilesummit2007.pdf},
  doi = {10.1109/ISTMWC.2007.4299081}
}
Svilen Ivanov, E. Nett, Stefan Schemmer
Planning Available WLAN in Dynamic Production Environments
FeT'2007, 7th IFAC International Conference on Fieldbuses and Networks in Industrial and Embedded Systems, Toulouse, France, November 7 - 9, 2007
[PDF]
André Herms, Georg Lukas, Svilen Ivanov
Precise Admission Control for Bandwidth Reservation in Wireless Mesh Networks
Proceedings of 4th Intl. Conference on Mobile Ad-Hoc and Sensor Networks
MASS'07, Pisa, Italy, October, 2007
ISBN:1-4244-1455-5
Quality of service in wireless mesh networks is an often requested feature for various kinds of applications. A common approach is the establishment of routes based on hop-by-hop reservation of bandwidth. In this paper we address the problems of admission control in wireless mesh networks. We show that the existing solutions suffer from temporal inconsistencies during the distributed admission process, which lead to high admission failure rates of approximately 2% to 10% in typical topologies, even with the best approach. A solution for this problem is presented, based on the two phase commit protocol. It prevents inconsistencies and the corresponding admission failures.
@inproceedings{cite:Herms2007c,
  author = {Andr{\'e} Herms and Svilen Ivanov and Georg Lukas},
  title = {Precise Admission Control for Bandwidth Reservation in Wireless Mesh Networks},
  booktitle = {Proceedings of 4th Intl. Conference on Mobile Ad-Hoc and Sensor Networks {MASS'07}},
  address = {Pisa, Italy},
  year = {2007},
  month = {October}
}

2006

André Herms, Georg Lukas, Svilen Ivanov
Realism in Design and Evaluation of Wireless Routing Protocols
In Proceedings of First international Workshop on Mobile Services and Personalized Environments (MSPE'06)
In this paper we consider the problem of reliable communication in wireless routing protocols. Many routing protocols for wireless networks use assumptions, that are known to be invalid in this special kind of networks. These shortcomings are not detected in the protocol evaluation, because common simulation tools are also based on these assumptions. In this paper we present a more realistic simulation model and a simple way of enabling existing protocols to handle real conditions of wireless propagation. A proof-of-concept implementation is presented and evaluated using simulation and measurements in a real and emulated network.
@inproceedings{cite:awds06,
  author = {Andr{\'e} Herms and Georg Lukas and Svilen Ivanov},
  title = {Realism in Design and Evaluation of Wireless Routing Protocols},
  booktitle = {Proceedings of First international Workshop on Mobile Services and Personalized Environments (MSPE'06)},
  address = {Aachen, Germany},
  year = {2006},
  month = {November},
  volume = {P-102},
  pages = {57--70},
  url = {http://ivs.cs.uni-magdeburg.de/EuK/forschung/publikationen/pdf/2006/awds-mspe.pdf}
}

2005

Daniel Mahrenholz, Svilen Ivanov
Adjusting the ns-2 Emulation Mode to a Live Network
KiVS'05, Kaiserslautern Germany, 28.02. - 03.03.2005.
[PS]

2004

Daniel Mahrenholz, Svilen Ivanov
Real-Time Network Emulation with ns-2
Proceedings of The 8-th IEEE International Symposium on Distributed Simulation and Real Time Applications,
Budapest Hungary, October 21-23, 2004.
[PS]