Testing of sensor observation services

Abstract

Recently, sensor webs have been increasingly used to monitor and sense a multitude of observations for various applications, from simple phenomena, such as air pollution measurements, to complex events, for instance perimeter security, or effluent tracking. Therefore, the performance of sensor data delivery mechanisms is becoming more and more important to ensure that services dependent upon sensor web technology perform satisfactorily. In the Open Geospatial Consortium (OGC) Sensor Web Enablement (SWE) framework, Sensor Observation Service (SOS) is a standard web service interface responsible for requesting, filtering, and retrieving sensor observations. In this paper, we present initial results from a quantitative analysis of SOS servers' performance. To do this, we measured the response time and transferred data volume, the response size, of three SOS servers -52North, MapServer, and Deegree -based on different test scenarios. The results are illustrated and discussed. Our findings can be helpful: (i) to understand how different parameters affect the SOS servers; (ii) to help SOS developers identify areas for improvement of their SOS; and (iii) to help application developers and users make informed decisions about their choice of SOS server.

A Sensor Web for Real-Time Groundwater Data Monitoring in Morocco

“…These works and other recent studies [26]- [28] have come to the same conclusion that Deegree SOS has the fastest response time independently of the volume of the data processed. Indeed, "Deegree SOS" is suitable for more complex situations, whereas "52˚ North" is more suited for average data volumes.…”

Performance Testing of istSOS under High Load Scenarios

“…Despite some SOS implementation being available on the market, at the current knowledge of the authors, no studies on performance of any SOS software are available in the literature to evaluate their applicability in real cases. Poorazizi et al [34] evaluated the performance of three SOS software implementations in serving data under varying number of sensors and filters on area and time interval but only under normal condition (a single user). The performance evaluation of SOS implementations under high loads (concurrent users) and varying data serving scenarios mimicking existing environmental monitoring network is currently not available in literature.…”

Identificação e tratamento dos problemas de desempenho de redes de sensores expostas por arquiteturas orientadas a serviço

“…Estudos que analisam desempenho no contexto dos serviços SWE podem ser encontrados em (McFerren et al, 2009;Tamayo et al, 2011Tamayo et al, , 2012Poorazizi et al, 2012). Todavia, trabalhos que exploram diferentes tipos de serviços, alterações nos filtros utilizados no acesso a esses serviços, variações nas quantidades de clientes e requisições não foram encontrados, sinalizando uma lacuna na literatura.…”

“…Em (Poorazizi et al, 2012) é apresentado um estudo complementar ao trabalho realizado em (McFerren et al, 2009 (Tamayo et al, 2012) é apresentada uma avaliação de desempenho dos padrões SWE em um ambiente de computação móvel. Nesse estudo, os autores avaliaram o desempenho de smartphones no processamento de documentos com observações de sensores obtidas através do SOS.…”