Wireless Sensor Networks (WSNs) are envisioned to become an integral part of the Future Internet where they extend the Internet to the physical world. Yet, while Service-Oriented Architectures (SOA) are prospering in Enterprise-IT, wireless sensor networks have -despite contrary prognoses -not found their way into enterprises. A major obstacle is certainly the different and resource-constraint nature of this class of devices. We argue that approaches for the seamless integration with existing, widely deployed SOA technologies such as XML, Web Services, and the Business Process Execution Language (BPEL) are key to the success of WSNs in enterprises. In this paper, we present our approach to integrate WSNs into SOA environments using these technologies in a resource-efficient but fully standard-compliant way. We evaluate our implementation and present a case study.
Designing and modifying sensor network applications demand for IT expertise in the field of distributed systems. Programming paradigms used in application development for sensor networks like object orientation do not refer to the distributed nature of a sensor network application. This represses the usage of sensor network technology as part of industrial applications. In enterprises graphical tools like BPEL and BPMN are used to coordinate distributed processes and overcome the complexity of the interaction among different components. In this work we introduce the GWELS toolbox as graphical process modeling tool to realize the service oriented programming paradigm for sensor networks and ease the development and integration of sensor network applications. We exemplarily design and deploy a sensor network application with GWELS to demonstrate the applicability of our approach.
Wireless Sensor Networks (WSNs) are envisioned to become an integral part of the Future Internet. Together with countless other embedded appliances, such resource-constraint devices will form an Internet of Things (IoT) where all kinds of devices extend the Internet to the physical world. In this vision, the seamless and flexible integration of IoT devices ranging from simple sensor nodes to large scale Enterprise IT servers are the basis for novel applications and business processes not possible before. A major challenge is to master the arising challenges of scale, low resources, and heterogeneity.
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