Efficient Peer-to-Peer Data Dissemination in Mobile Ad-Hoc Networks
ICPPW '02 Proceedings of the 2002 International Conference on Parallel Processing Workshops
Dissemination asynchrone d'information en mode peer-to-peer dans les réseaux ad-hoc
UbiMob '04 Proceedings of the 1st French-speaking conference on Mobility and ubiquity computing
CenWits: a sensor-based loosely coupled search and rescue system using witnesses
Proceedings of the 3rd international conference on Embedded networked sensor systems
CTS '06 Proceedings of the International Symposium on Collaborative Technologies and Systems
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Many research projects have defined applications that are claimed to operate in a MANet environment. Consider for instance these software tools that make it possible to share information (files, databases, etc.). It appears that most of the proposed solutions require a central server. Such a server makes it possible to store and then distribute a coherent copy of the data to the mobile units of the system, thus providing some sort of data consistency. This approach does not work in a real world MANet environment, where the presence of a central server cannot be guaranteed. We believe that the applications that really work in a MANet context are those that do not require global consistency. In this paper we present an application that we have designed and implemented and that makes it possible to share a document among the mobile nodes of a MANet. We furthermore decided to consider MANets without any specific networking layer, and to be more specific MANETs without routing. The major originalities of our solution are that: - it works in a real MANet environment (nodes are really mobile and can be turned on or off at any time); - it makes it possible to modify the shared data without any central server, still ensuring consistency. Of course the price to pay is a number of limitations that we describe.