This file was created by the TYPO3 extension bib --- Timezone: CEST Creation date: 2024-04-19 Creation time: 21-03-12 --- Number of references 11 inproceedings 2010-kunz-mascots-horizon 2010 8 18 172-181 The simulation models of wireless networks rapidly increase in complexity to accurately model wireless channel characteristics and the properties of advanced transmission technologies. Such detailed models typically lead to a high computational load per simulation event that accumulates to extensive simulation runtimes. Reducing runtimes through parallelization is challenging since it depends on detecting causally independent events that can execute concurrently. Most existing approaches base this detection on lookaheads derived from channel propagation latency or protocol characteristics. In wireless networks, these lookaheads are typically short, causing the potential for parallelization and the achievable speedup to remain small. This paper presents Horizon, which unlocks a substantial portion of a simulation model's workload for parallelization by going beyond the traditional lookahead. We show how to augment discrete events with durations to identify a much larger horizon of independent simulation events and efficiently schedule them on multi-core systems. Our evaluation shows that this approach can significantly cut down the runtime of simulations, in particular for complex and accurate models of wireless networks. horizon fileadmin/papers/2010/2010-kunz-mascots-horizon.pdf Online IEEE Computer Society

Los Alamitos, CA, USA

Proceedings of the 18th Annual Meeting of the IEEE/ACM International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS'10), Miami, FL, USA Miami, FL, USA 18th Annual Meeting of the IEEE/ACM International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS'10) August 17-19, 2010 en 978-0-7695-4197-6 1526-7539 10.1109/MASCOTS.2010.26 1 GeorgKunz OlafLandsiedel JamesGross StefanGötz FarshadNaghibi KlausWehrle inproceedings 2010-heer-pisa-sa 2010 8 2 1 588-593 With the goal of providing ubiquitous wireless services (e.g., tourist guides, environmental information, pedestrian navigation), municipal wireless networks are currently being established all around the world. For municipalities, it is often challenging to achieve the bandwidth and coverage that is necessary for many of the envisioned network services. At the same time, Wi-Fi-sharing communities achieve high bandwidth and good coverage at a very low cost by capitalizing on the dense deployment of private access points in urban areas. However, from a technical, conceptual, and security perspective, Wi-Fi sharing community networks resemble a patchwork of heterogeneous networks instead of one well-planned city-wide network. This patchwork character stands in stark contrast to a uniform, secure platform for public and commercial services desirable for the economic success of such a network. Hence, despite its cost-efficiency, the community-based approach cannot be adopted by municipalities easily. In this paper, we show how to realize municipal wireless services on top of a Wi-Fi-sharing infrastructure in a technically sound and economically attractive fashion. In particular, we focus on how to securely provide services to mobile clients with and without client-side software support. Our solution cleanly separates the roles of controlling and administering the network from providing bandwidth and wireless access. With this separation, commercial ISPs and citizens with their private Wi-Fi can contribute to the network infrastructure. This allows municipalities in turn to focus their resources on municipal wireless services. mobile_access http://www.comsys.rwth-aachen.de/fileadmin/papers/2010/2010-heer-icc-pisa-sa.pdf Print IEEE Press

Washington, DC, USA

International Conference on Computer Communication Networks, ICCCN 2010, Zurich Zurich, Switzerland International Conference on Computer Communication Networks, ICCCN 2010 en 978-1-4244-7114-0 10.1109/ICCCN.2010.5560103 1 TobiasHeer ThomasJansen RenéHummen HannoWirtz StefanGötz EliasWeingaertner KlausWehrle inproceedings 201004IPSNbitschratmote 2010 4 12 432--433 In this work, we present RatMote, a new wireless sensor node for subterranean animal habitat monitoring. RatMote has been developed for project RatPack, which aims at creating a new method for behavioral research on rats in their natural environment using wireless sensor nodes. Recent development in microcontroller architecture allowed us to design a sensor node which calculates up to 22 times more operations per mAh than the widely used TelosB node. This significant performance and efficiency increase allows us to perform computationally demanding algorithms inside the node, needed for vocalization analysis, localization, and mapping. Demo Abstract RatPack fileadmin/papers/2010/2010-04-IPSN-bitsch-ratmote.pdf http://doi.acm.org/10.1145/1791212.1791291 Online ACM

New York City, NY, USA

IPSN '10 Proceedings of the 9th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN 2010), Stockholm, Sweden ACM Stockholm, Sweden 9th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN 2010) April 12-16, 2010 en 978-1-60558-988-6 http://doi.acm.org/10.1145/1791212.1791291 1 Jó AgilaBitsch Link ThomasBretgeld AndréGoliath KlausWehrle inproceedings 2010-percomws-heer-munifi Proceedings of the Sixth IEEE PerCom Workshop on Pervasive Wireless Networking (PWN 2010), IEEE. 2010 4 2 1 588 - 593 Municipal Wi-Fi networks aim at providing Internet access and selected mobile network services to citizens, travelers, and civil servants. The goals of these networks are to bridge the digital divide, stimulate innovation, support economic growth, and increase city operations efficiency. While establishing such urban networks is financially challenging for municipalities, Wi-Fi-sharing communities accomplish good coverage and ubiquitous Internet access by capitalizing on the dense deployment of private access points in urban residential areas. By combining Wi-Fi communities and municipal Wi-Fi, a collaborative municipal Wi-Fi system promises cheap and ubiquitous access to mobile city services. However, the differences in intent, philosophy, and technical realization between community and municipal Wi-Fi networks prevent a straight-forward combination of both approaches. In this paper, we highlight the conceptual and technical challenges that need to be solved to create collaborative municipal Wi-Fi networks. mobile_access http://www.comsys.rwth-aachen.de/fileadmin/papers/2010/2010-heer-percomws-collaborative-municipal-wi-fi.pdf Print IEEE Press

Washington, DC, USA

Proceedings of the Sixth IEEE PerCom Workshop on Pervasive Wireless Networking (PWN 2010), Mannheim, Germany. Mannheim, Germany Sixth IEEE PerCom Workshop on Pervasive Wireless Networking (PWN 2010) April 02, 2010 en 978-1-4244-6605-4 10.1109/PERCOMW.2010.5470505 TobiasHeer RenéHummen NicolaiViol HannoWirtz StefanGötz KlausWehrle inproceedings DBLP:conf/webist/ChristophGK10 2010 4 2 48-54 Print Joaquim Filipe and José Cordeiro INSTICC Press WEBIST 2010, Proceedings of the 6th International Conference on Web Information Systems and Technologies, Valencia, Spain en 978-989-674-025-2 UtaChristoph DanielGötten Karl-HeinzKrempels inbook 2010-02-book-alizai-hardware-and-systems 2010 2 1 99-117 http://www.network-simulation.info/ http://www.amazon.com/Modeling-Tools-Network-Simulation-Wehrle/dp/3642123309 Print Springer LNCS Chapter 7 Modeling and Tools for Network Simulation EN 978-3-642-12330-6 Muhammad HamadAlizai LeiGao TorstenKempf OlafLandsiedel book 2010-kai-euras2 2010 print EURAS

Hamburg, DE

en 978-3-86130-245-2 1 Jean-ChristopheGraz KaiJakobs inproceedings Eisenblaetter10 2010 227 -236 Proc. of the 8th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks (WiOpt'10) AndreasEisenblätter Hans-FlorianGeerdes JamesGross OscarPuñal JonasSchweiger inproceedings 201003GarciaEffContAwareAccControlPMS 2010 Proceedings of the First IEEE PerCom Workshop on Pervasive Healthcare OscarGarcia-Morchon KlausWehrle inproceedings 201006GarciaIFIPTM 2010 ManyapplicationsrunningontheInternetoperateinfullyor semi-distributed fashion including P2P networks or social networks. Dis- tributed applications exhibit many advantages over classical client-server models regarding scalability, fault tolerance, and cost. Unfortunately, the distributed system operation also brings many security threats along that challenge their performance and reliability. In particular, faulty or mis- behaving nodes cannot collude to subvert the system operation. This paper addresses the above threats by applying cooperative security techniques to relevant distributed systems in the Internet. Our goal is to present methods that allow the peers to bootstrap basic trust relation- ships at the time of joining a distributed network and remove the peers if trust is lost. We consider the specific security caveats of the analyzed sys- tems, investigate the applicability of existing cooperative security-based protocols, and propose general design guidelines for cooperative-security protocol in described distributed systems. Print Springer

Berlin

Proceedings of IFIPTM 2010 - 4th International Conference on Trust Management Morioka, Japan 4th International Conference on Trust Management en 978-3-642-13445-6 1 DmitriyKuptsov OscarGarcia-Morchon KlausWehrle AndreiGurtov inproceedings 201006GarciaSacmat 2010 Medical sensor networks allow for pervasive health monitoring of users in hospitals, at home, or on the way. The privacy and confidentiality of medical data need to be guaranteed at any moment to make sure that unauthorized parties cannot retrieve confidential information. This is a great challenge due to two main reasons. First, wireless sensors are resource-constrained devices that limit the applicability of traditional solutions. Second, the access control system must be context-aware and adapt its security settings to ensure the users' safety during, e.g., medical emergencies. To solve these issues, this paper presents a modular context-aware access control system tailored to pervasive medical sensor networks in which the access control decisions and the response delay depend upon the health acuteness of a user. Our system extends traditional role-based access control systems by allowing for context-awareness in critical, emergency, and normal access control situations. We further present a lightweight encoding for our modular access control policies as well as an access control engine efficiently running on resource-constrained sensor nodes. Finally, we analyze how the proposed access control system suits existing security architectures for medical sensor networks.

Pittsburgh, USA

Proceedings of ACM Symposium on Access Control Models and Technologies (SACMAT'10) ACM 978-1-4503-0049-0 10.1145/1809842.1809864 1 OscarGarcia-Morchon KlausWehrle