Nomadic computing—an opportunity
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Nomadic computing is a term for describing computing environments where the nodes are mobile and have only ad hoc interactions with each other. Evidently, context aware applications are a key ingredient in such environments. However, nomadic nodes may not always have the capability to sense their environment and infer their exact context. Hence, applications carried by the nodes will not be able to execute properly. In this paper, we propose an architecture for collaborative exchange of contextual information in an ad hoc setting. This approach is called "context foraging" and is used for disseminating contextual information based on a publish/subscribe scheme. We present the algorithms required for such architecture along with the dynamic event indexing techniques used by the system. The efficiency of the suggested approach is assessed through simulation results. Our proposal is investigated and implemented in the context of the ICT IPAC Project.