Chen-Da Hou

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Web of Things (WoT) makes it possible to connect tremendous embedded devices to web in Representational State Transfer (REST) style. Some lightweight RESTful protocols have been proposed for the WoT to replace the HTTP protocol running on embedded devices. However, they keep the principal characteristic of the REST style. In particular, they support(More)
As sensor networks are increasingly being deployed, there will be more sensors available in the same region, making it strategic to select the suitable ones to execute users’ applications. We propose a task execution framework, named sTaskAlloc, to execute application energy efficiently by two main parts. First, considering that the energy consumption of an(More)
In order to simplify programming for building sensor networks, macro-programming methods have been proposed in prior work. Most of them are designed for the dedicated networks and specific scenarios where devices are mostly homogeneous. Nevertheless the methods rarely consider those shared networks which are composed of heterogeneous devices, e.g., sensors,(More)
The lightweight RESTful protocols, such as CoAP and SeaHttp, have been proposed for web-based sensor network (WBSN), which provides web service on resource-constrained devices. In general, because sensing data are spatially correlated in sensor network, it is efficient to request a group of devices located in nearby area. Thus group requesting is a typical(More)
The lightweight RESTful protocols, such as CoAP, have been proposed to provide web service on resource constrained devices. However, these devices normally operate in battery and work in sleeping mode most time to prolong lifetime. Consequently it is difficult to maintain persistent end-to-end connection and leads to the high access delay for web requests.(More)
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