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In conventional wireless sensor networks, sinks collect data from sensors and/or aggregators and interact with end-user applications via centralized gateways. However, there exist application scenarios where this modus operandi may not be suitable. In such cases it is preferable that the applications interact directly with the sensors. This paper proposes a Web- service based architecture with an overlaid UDDI for these cases. It also presents simulation results for these scenarios to demonstrate performance gains.
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Glitho et al. (2007) studied this question.