Fence Monitoring – Experimental Evaluation of a Use Case for Wireless Sensor Networks (2008)
Georg Wittenburg, Kirsten Terfloth, Freddy López Villafuerte, Tomasz Naumowicz, Hartmut Ritter, Jochen Schiller
Abstract. In-network data processing and event detection on resourceconstrained devices are widely regarded as distinctive and novel features of wireless sensor networks. The vision is that through...
Low-Power Image Transmission in Wireless Sensor Networks using ScatterWeb Technology (2008)
Achim Liers, Hartmut Ritter, Jochen Schiller
ScatterWeb, a distributed, heterogeneous platform for the ad-hoc deployment of sensor networks, offers hardware and open, fully documented software for the deployment of embedded sensor networks....
Mobile Phone Gaming (A Follow-up Survey of the Mobile Phone Gaming Sector and its Users) (2008)
Tobias Fritsch, Hartmut Ritter, Jochen Schiller
Abstract: Over the last decade the importance of network games has seen a tremendous growth. A large part includes the size reduction of the handheld devices. Mobile gaming in a wireless environment...
Departement Informatik, ETH Zürich (2008)
Eth Zürich, Kay Römer (editor, Zinaida Benenson, Rwth Aachen, Friedemann Mattern, Eth Zürich, ...
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Holger Kirchner, Daniel Glöckner, Gerald Bieber, Sven Gabrecht, Daniela Nicklas, Susanne Bürklen, ...
dar. Ist ein mobiles Endgerät in der Lage, die aktuelle Position des Benutzers zu bestimmen, kann diese Information von der Anwendung berücksichtigt werden – man spricht dabei allgemein von...
Hartmut Ritter, Kirsten Terfloth, Georg Wittenburg, Jochen Schiller (hrsg, Gi/itg Kuvs Fachgespräch, Drahtlose Sensornetze, ...
Native ATM Interfaces in C and Java: Implementation and Experiences (2007)
Stefan Dresler, Robert Lisak, Hartmut Ritter, Hajo R. Wiltfang
ATM, the asynchronous transfer mode, represents a flexible transmission technology, which offers a set of new services to the user. In order to take advantage of ATM's strength and to be able to...
Traffic shaping in end systems attached to qos-supporting networks (2007)
informatik.uni-karlsruhe.de Quality of Service (QoS) supporting network architectures, like the Differentiated Services architecture, require a certain agreement regarding service levels. Traffic...
Advanced Mechanisms for Available Rate Usage in ATM and Differentiated Services Networks (2007)
Dirk Holzhausen, Hartmut Ritter, Klaus Wehrle
The Available Bit Rate (ABR) service category was defined for ATM networks in order to provide a minimal guaranteed rate while letting a user exploit additional unused capacity from other service...
Improving the Performance of TCP on guaranteed bandwidth connections (2007)
Hartmut Ritter, Klaus Wehrle, Lars Wolf
Abstract. This paper discusses the performance of the Transmission Control Protocol under two aspects: First, the future Internet will provide some kind of service differentiation and bandwidth...
Fence monitoring - experimental evaluation of a use case for wireless sensor networks (2007)
Georg Wittenburg, Kirsten Terfloth, Freddy López Villafuerte, Tomasz Naumowicz, Hartmut Ritter, Jochen Schiller
Abstract. In-network data processing and event detection on resourceconstrained devices are widely regarded as distinctive and novel features of wireless sensor networks. The vision is that through...
ScatterWeb - Low Power Sensor Nodes and Energy Aware Routing (2005)
Jochen Schiller, Achim Liers, Hartmut Ritter, Rolf Winter, Thiemo Voigt
ScatterWeb, a distributed, heterogeneous platform for the ad-hoc deployment of sensor networks offers hardware together with open, fully documented software for the deployment of embedded sensor...
Experimental Evaluation of Lifetime Bounds for (2005)
Wireless Sensor Networks, Hartmut Ritter, Jochen Schiller
In this paper we present a method for experimental lifetime measurements of sensor networks. Despite the importance of experimental validation, none of the lifetime models proposed so far has been...
Connecting Wireless Sensornets with TCP/IP Networks (2004)
Adam Dunkels, Juan Alonso, Thiemo Voigt, Hartmut Ritter, Jochen Schiller
Abstract. Wireless sensor networks are based on the collaborative efforts of many small wireless sensor nodes, which collectively are able to form networks through which sensor information can be...
Connecting Wireless Sensornets with TCP/IP Networks (2004)
Adam Dunkels, Juan Alonso, Thiemo Voigt, Hartmut Ritter, Jochen Schiller
Abstract. Wireless sensor networks are based on the collaborative efforts of many small wireless sensor nodes, which collectively are able to form networks through which sensor information can be...
Solar-Aware clustering in wireless sensor networks (2004)
Energy conservation plays a crucial in wireless sensor networks since such networks are designed to be placed in hostile and non-accessible areas. While battery-driven sensors will run out of battery...
A Partition Detection System for Distributed Mobile Games (2004)
Hartmut Ritter, Rolf Winter, Jochen Schiller
Recently, a significant amount of attention has been directed toward Mobile Multiplayer Games. Current games are still limited to a few players and often rely on a server based structure, but it...
A Survey of Gamers Expectations of Future Mobile Gaming Trends (2004)
Hartmut Ritter, Rolf Winter, Jochen Schiller
In the recent past several companies have launched new products for the mobile gaming market. That includes mobile gaming devices [1, 2, 3], but also middleware [4] was developed aiming at meeting...
Hartmut Ritter, Thiemo Voigt, Jochen Schiller, Min Tian
Multiplayer games for mobile wireless devices are becoming increasingly popular. Many modern devices such as PDAs or mobile telephones are equipped with Bluetooth interfaces. Bluetooth facilitates...
A Highly Flexible Testbed for Studies of ad-hoc Network Behaviour (2003)
Hartmut Ritter, Min Tian, Thiemo Voigt, Jochen Schiller
Studies of mobile ad-hoc networks are often based on simulation and their underlying, necessarily simplified assumptions of physical reality. In order to analyse the practical problems we built our...
Solar-aware Routing in Wireless Sensor Networks (2003)
Thiemo Voigt, Hartmut Ritter, Jochen Schiller
In wireless sensor networks energy is a valuable but not necessary scarce resource. While it is often assumed that nodes in sensor networks are powered by batteries, other energy sources such as...
Utilizing solar power in wireless sensor networks (2003)
Thiemo Voigt, Hartmut Ritter, Jochen Schiller
Sensor networks are designed especially for deployment in adverse and nonaccessible areas without a fixed infrastructure. Therefore, energy conservation plays a crucial role for these networks. We...
A flexible Multiplexing Mechanism for Supporting Quality of Service in Mobile Environments (2001)
According to current trends in the area of mobile communication, mobile devices rapidly gain significance. These trends go hand in hand with the growing demand for a mobile and wireless access to a...
A flexible Multiplexing Mechanism for Supporting Quality of Service in Mobile Environments (2001)
According to current trends in the area of mobile communication, mobile devices rapidly gain significance. These trends go hand in hand with the growing demand for a mobile and wireless access to a...
DiffServ in the Web: Different Approaches for Enabling better Services in the World Wide Web (2000)
Hartmut Ritter, Thorsten Pastoors, Klaus Wehrle
Abstract. The paper discusses several approaches to use the Differentiated Services Architecture for providing better services to the users of the World Wide Web. In the future Internet a user wants...
DiffServ in the Web: Different Approaches for Enabling better Services in the World Wide Web (2000)
Hartmut Ritter, Thorsten Pastoors, Klaus Wehrle
Abstract. The paper discusses several approaches to use the Differentiated Services Architecture for providing better services to the users of the World Wide Web. In the future Internet a user wants...
Netzwerk-Management und Hochleistungskommunikation XIX. Seminar WS 1998/99 (1999)
Dorner, Elmar, Gan, Meng, Ritter, Hartmut, Schiller, Jochen, [Hrsg.]
Der vorliegende Interne Bericht enthält die Beiträge zum Seminar "Netzwerk-Management und Hochleistungs-Kommunikation", das im Wintersemester 1998/99 zum neunzehnten Mal stattgefunden hat. Die...
Netzwerkmanagement und Hochgeschwindigkeits- Kommunikation. Teil XVII (1998)
Dorner, Elmar, Dresler, Stefan, Hofmann, Markus, Ritter, Hartmut, Schiller, Jochen, Seitz, Jochen, ...
Der vorliegende Interne Bericht enthält die Beiträge zum Seminar "Netzwerk-Management und Hochgeschwindigkeits- Kommunikation, das im Wintersemester 1997/98 zum siebzehnten Mal stattgefunden hat....