Author: | O. Waldhorst, C. Lindemann | links: | DownloadBibtex |
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Source: | Proc. 14. GI / ITG Fachtagung Kommunikation in Verteilten Systemen (KiVS), pp. 29-40, Kaiserslautern, Germany, February 2005 | ||
This paper presents an approach for exchanging presence information
between users of an instant messaging system in a mobile ad hoc network. As
major feature, presence information is transferred when mobile users get in
direct contact, similar to the spread of an infections disease. By exploiting node mobility, presence information is epidemically distributed throughout the
network, effectively overcoming network partitions. We show how to apply the
Passive Distributed Indexing Protocol, which implements a general-purpose
lookup service for mobile applications building upon epidemic data
dissemination, for implementing the exchange of presence information. The
effectiveness of the approach is illustrated in a simulation study using the
network simulator ns-2. Building upon the results, we present the architecture
of a mobile instant messaging system that supports the widely adopted
Extensible Messaging and Presence Protocol (XMPP), an IETF standardized
protocol for instant messaging.