Ontology-driven adaptive sensor networks

Abstract

A wireless sensor network deployed in an area of interest is affected by variations in environmental conditions associated with that area. It must adapt to these variations in order to continue functioning as desired by the user. We present a novel, two-phase solution to the wireless sensor network adaptivity problem. In the first phase, nodes in the network, organized as clusters, execute an efficient algorithm to dynamically calibrate sensed data. Each node provides its current energy level and the state of each on-board sensor to a cluster-head. In the second phase, each clusterhead executes an efficient, ontology-driven algorithm to determine the future state of the network under existing conditions, based on information received from each sensor node. We describe an example application scenario to show how our two-phase solution can be employed to enable a realworld wireless sensor network to adapt itself to variations in environmental conditions.

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“…However, the main problem today is that there are no standards or recommendations regarding the requirements for such equipment (electrical signals, communicational protocols and compatibility of software). There are merely some suggestions ( [35][36][37] [39] and CESN [40]) are merely descriptions of sensors, other like OntoSensor [41] are also capable of describing 'components', or like OOSTethys 'processes' in addition. Their conclusion gives the statement that a "combination of OntoSensor and the CSIRO ontology represents the current limit of expressive capability for semantic sensors" [38], but none of them is able to deal with the whole context of sensor descriptions.…”

Semantic web based architecture for managing hardware heterogeneity in wireless sensor network

“…In the paper [Avancha, et al (2004)] ontologies are used for enabling an adaptive WSN, i.e. optimal sensor nodes operating modes.…”

Exploiting Web Technologies to Build Autonomic Wireless Sensor Networks

“…Regarding the use of ontologies, a pioneer work defines an ontology for sensor nodes [11], which seeks to capture the most important sensor features to describe their functionalities and current state. Such work has similarities with ours in the sense that the contextual information is described by ontologies, with the goal of adapting the WSN behavior to different execution states.…”