pREST: a REST-based protocol for pervasive systems

Abstract

The convergence of embedded systems and wireless communication enables interconnection of electronic devices to render control and provide information to the user: Offices, apartments, and public spaces are or in nearfuture will be able to deliver information and services to their occupants ranging from instant Internet access to confrguration and control in a context dependent, personalized way.Despite progressing internemorking and sophistication, we are still dealing with islands of functionality rather than the invisible computer envisioned by Mark Weise,: We believe that the spread and acceptance of smart environments will depend on common standards as well as a simple and jexible way to access data and devices and compose services from existing ones. A good example of such a system is the World Wide Web, whose success is mainly due to the simplicity with which all kinds of content can be published and referenced.We present an access protocol to bring the Web's simplicity and holistic view on data and services to pervasive systems. Our approach is based on the Representational State Transfer architectural style and emphasizes abstraction of data and services as resources, interoperation via self describing data and service orchestration with loosely typed components. A particular concern is to pmvide for functionality in the absence of proxy nodes or infrastructure services like directory servers.

Interacting with the SOA-Based Internet of Things: Discovery, Query, Selection, and On-Demand Provisioning of Web Services

“…Thus, while the WSN platforms are rather heterogeneous, the services that the sensor nodes can offer share significant similarities and could be (re)deployed on-demand per developer request. In the work presented here we build upon existing research on device integration through services [8], [9], [10], [15]. Our key contribution is the service discovery process for real-world services initially introduced in [16].…”

Resource‐Oriented Architecture

“…Although HTTP introduces a communication overhead and increases average response latency, in many pervasive scenarios this overhead does not affect user experience [17], [12]. For example, we have argued [9] that the performance of using HTTP as a data exchange protocol is mostly sufficient for common pervasive scenarios, especially when only few users are accessing the same resource simultaneously (200 ms average response time was reported with 100 concurrent users on a 1.1 GHz server).…”

“…However it focuses mainly on the discovery of devices and not on how to provide their functionality on the Web. Closer to our work, [16] and in particular [17] consider the use of REST-like architectures for sensor networks. We build upon these approaches and propose a systematic implementation of the RESTful constraints (see Section III-A) and extend the model with the use of standard Web syndication such as using Atom.…”

Bringing pervasive embedded networks to the service cloud: A lightweight middleware approach

“…The work presented in this research paper is partially based on previous existing works that dealt with adapting classical service approaches to embedded systems [11,12]. The main contribution of our research is the design, development and evaluation of a middleware platform that enables Service-Oriented Computing in pervasive embedded networks by providing lightweight protocols and mechanisms making both "horizontal" and "vertical" interactions easier (see Fig.…”