OGC® Sensor Web Enablement: Overview and High Level Architecture
GeoSensor Networks
A Framework of Spatial Sensor Web
SITIS '07 Proceedings of the 2007 Third International IEEE Conference on Signal-Image Technologies and Internet-Based System
IEEE Internet Computing
CTS '09 Proceedings of the 2009 International Symposium on Collaborative Technologies and Systems
SemSOS: Semantic sensor Observation Service
CTS '09 Proceedings of the 2009 International Symposium on Collaborative Technologies and Systems
A distributed geospatial infrastructure for Sensor Web
Computers & Geosciences
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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.