Artikel in Tagungsband INPROC-2011-61

Bibliograph.
Daten
Geiger, Lars; Dürr, Frank; Rothermel, Kurt: Adaptive Routing in a Contextcast Overlay Network.
In: Proceedings of the IEEE 7th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob 2011).
Universität Stuttgart : Sonderforschungsbereich SFB 627 (Nexus: Umgebungsmodelle für mobile kontextbezogene Systeme).
S. 1-8, englisch.
IEEE Xplore, 10. Oktober 2011.
DOI: 10.1109/WiMOB.2011.6085340.
Artikel in Tagungsband (Konferenz-Beitrag).
CR-Klassif.C.2.1 (Network Architecture and Design)
C.2.2 (Network Protocols)
C.2.4 (Distributed Systems)
C.2.6 (Internetworking)
Kurzfassung

Context-based communication allows for the dissemination of messages to mobile users with a specified context, i.e., at a location and with certain attribute values. This enables, e.g., a message to students on campus attending a certain class, with information about a study group for an upcoming exam. An overlay network of context-aware routers efficiently disseminate the messages to all matching receivers. Directed forwarding of such messages requires that the routers maintain knowledge about the contexts of connected users. Global knowledge, i.e., each router knowing about every user, scales poorly, though, because of the necessary updates.

To overcome this challenge, a router can selectively propagate context information that actually allows its neighbors to prune a message distribution tree. In this paper, we present an approach to adaptively propagate only those user contexts that offer a reduction in overall system load. The algorithm automatically and locally adapts to the observed messages and user contexts on each node.

Our solution significantly improves the scalability of the system by reducing the overall load by almost 50%.

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Abteilung(en)Universität Stuttgart, Institut für Parallele und Verteilte Systeme, Verteilte Systeme
Projekt(e)SFB-627, A2 (Universität Stuttgart, Institut für Parallele und Verteilte Systeme, Verteilte Systeme)
Eingabedatum2. August 2011
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