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Availability Issues in Wireless Visual Sensor Networks
DTEC-UEFS, State University of Feira de Santana, Feira de Santana 44036-900, Brazil
IMD-UFRN, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil
DCA-CT-UFRN, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil
IDMEC-FEUP-UP, University of Porto, Porto 4200-465, Portugal
INESC TEC-FEUP-UP, University of Porto, Porto 4200-465, Portugal
* Author to whom correspondence should be addressed.
Received: 18 November 2013; in revised form: 10 December 2013 / Accepted: 28 January 2014 / Published: 12 February 2014
Abstract: Wireless visual sensor networks have been considered for a large set of monitoring applications related with surveillance, tracking and multipurpose visual monitoring. When sensors are deployed over a monitored field, permanent faults may happen during the network lifetime, reducing the monitoring quality or rendering parts or the entire network unavailable. In a different way from scalar sensor networks, camera-enabled sensors collect information following a directional sensing model, which changes the notions of vicinity and redundancy. Moreover, visual source nodes may have different relevancies for the applications, according to the monitoring requirements and cameras’ poses. In this paper we discuss the most relevant availability issues related to wireless visual sensor networks, addressing availability evaluation and enhancement. Such discussions are valuable when designing, deploying and managing wireless visual sensor networks, bringing significant contributions to these networks.
Keywords: wireless visual sensor networks; availability; directional coverage; coverage metrics
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MDPI and ACS Style
Costa, D.G.; Silva, I.; Guedes, L.A.; Vasques, F.; Portugal, P. Availability Issues in Wireless Visual Sensor Networks. Sensors 2014, 14, 2795-2821.
Costa DG, Silva I, Guedes LA, Vasques F, Portugal P. Availability Issues in Wireless Visual Sensor Networks. Sensors. 2014; 14(2):2795-2821.
Costa, Daniel G.; Silva, Ivanovitch; Guedes, Luiz A.; Vasques, Francisco; Portugal, Paulo. 2014. "Availability Issues in Wireless Visual Sensor Networks." Sensors 14, no. 2: 2795-2821.