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Architecting reconfigurable publish/subscribe applications for wireless sensor networks

This paper presents an approach, called LBS, for modelling and implementing the architecture of wireless sensor networks WSNs publish/subscribe Pub/Sub applications using a local broker subcomponent LBS model. Considering the reconfigurability of WSNs applications which is necessary for WSNs middleware, a graph-oriented local broker subcomponent GOLBS model is defined based on the LBS model by integrated WSNs middleware with Pub/Sub. Focusing on the evolution specification of reconfiguration and non-predefined dynamic reconfiguration, we define the notations of what is the GOLBS' graph grammars and GOLBS' graph, and show a derivative procedure. We design and implement a prototype system on GOLBS, called Pub/Sub-GOLBS. Performance evaluations imply that GOLBS can easily be constructed, while ensuring good reconfigurability.