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Telcom

In: Computers and Technology

Submitted By rudaruza
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Integrating Wireless Sensor Networks with the Web
Walter Colitti
Vrije Universiteit Brussel - ETRO Pleinlaan 2, 1050 Brussels +32 2 629 10 27

Kris Steenhaut
Vrije Universiteit Brussel - ETRO Pleinlaan 2, 1050 Brussels +32 2 629 29 76

Niccolò De Caro
Vrije Universiteit Brussel - ETRO University of Perugia - DIEI +32 2 629 10 27

wcolitti@etro.vub.ac.be

ksteenha@etro.vub.ac.be

ndecaro@etro.vub.ac.be

ABSTRACT
IPv6 over Low power Wireless Personal Area Networks (6LoWPAN) has accelerated the integration of Wireless Sensor Networks (WSNs) and smart objects with the Internet. At the same time, the Constrained Application Protocol (CoAP) has made it possible to provide resource constrained devices with RESTful web service functionalities and consequently to integrate WSNs and smart objects with the Web. The use of Web services on top of IP based WSNs facilitates the software reusability and reduces the complexity of the application development. This work focuses on RESTful WSNs. It describes CoAP, highlights the main differences with HTTP and reports the results of a simple experiment showing the benefits of CoAP in terms of power consumption compared to HTTP. The paper also describes the design and development of an end-to-end IP based architecture integrating a CoAP over 6LowPAN Contiki based WSN with an HTTP over IP based application. The application allows a user to access WSN data directly from a Web browser. The main system’s building blocks and functionalities are described.

(6LoWPAN) [8]. This new standard enables the use of IPv6 in Low-power and Lossy Networks (LLNs), such as those based on the IEEE 802.15.4 standard [10]. In addition to 6LowPAN, IETF Routing over Low-power and Lossy networks (ROLL) Working Group has designed and specified a new IP routing protocol for smart object internetworking. The protocol is called IPv6 Routing

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