期刊
SENSORS
卷 20, 期 22, 页码 -出版社
MDPI
DOI: 10.3390/s20226542
关键词
dependability; mathematical modelling; availability; wireless sensor networks; visual sensing; coverage failures
资金
- Norte Portugal Regional Operational Programme (NORTE 2020), under the PORTUGAL 2020 Partnership Agreement, through the European Social Fund (ESF) [NORTE-08-5369-FSE-000003]
- Brazilian CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico) Agency [204691/2018-4]
In critical industrial monitoring and control applications, dependability evaluation will be usually required. For wireless sensor networks deployed in industrial plants, dependability evaluation can provide valuable information, enabling proper preventive or contingency measures to assure their correct and safe operation. However, when employing sensor nodes equipped with cameras, visual coverage failures may have a deep impact on the perceived quality of industrial applications, besides the already expected impacts of hardware and connectivity failures. This article proposes a comprehensive mathematical model for dependability evaluation centered on the concept of Quality of Monitoring (QoM), processing availability, reliability and effective coverage parameters in a combined way. Practical evaluation issues are discussed and simulation results are presented to demonstrate how the proposed model can be applied in wireless industrial sensor networks when assessing and enhancing their dependability.
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