| 1. |
- Forsström, Stefan, et al.
(författare)
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MediaSense - an Internet of Things Platform for Scalable and Decentralized Context Sharing and Control
- 2012
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Ingår i: ICDT 2012, The Seventh International Conference on Digital Telecommunications. - : International Academy, Research and Industry Association (IARIA). - 9781612081939 ; , s. 27-32
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Konferensbidrag (refereegranskat)abstract
- Research in Internet-of-Things infrastructures has so far mainly been focused on connecting sensors and actuators to the Internet, while associating these devices to applications via web services. This has contributed to making the technology accessible in areas such as smart-grid, transport, health, etc. These early successes have hidden the lack of support for sensor-based applications to share information and limitations in support for applications to access sensors and actuators globally. We address these limitations in a novel open-source platform, MediaSense. MediaSense offers scalable, seamless, real-time access to global sensors and actuators via hetero- geneous network infrastructure. This paper presents a set of requirements for Internet-of-Things applications support, an overview of our architecture, and application prototypes created in order to verify the approach in a test bed with users connected from heterogeneous networks.
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| 2. |
- Walters, Jamie, et al.
(författare)
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A Context-Relational Approach for the Internet of Things
- 2012
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Ingår i: EMERGING 2012, The Fourth International Conference on Emerging Network Intelligence. - : International Academy, Research and Industry Association (IARIA). - 9781612082394 ; , s. 49-55
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Konferensbidrag (refereegranskat)abstract
- Context-centric applications and services are premised on the ability to readily respond to changes in context. Centralized approaches to enabling this are undermined by their dependencies on DNS naming services while decentralized approaches using DHT variants have been centred on the provisioning of the underlying context information, creating information-centric rather than context-centric solutions. A dynamic Internet of Things mandates a new paradigm; approaches storing, discovering and associating context entities relevant to their context state. In this paper, we explore such a paradigm, and with the implementation of a prototype, show the advantages of moving towards the notion of context-state centricity on the Internet of Things.
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| 3. |
- Walters, Jamie, et al.
(författare)
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A Distributed Framework for Organizing an Internet of Things
- 2012
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Ingår i: Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering. - Berlin, Heidelberg : Springer. - 9783642294785 ; , s. 231-247
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Konferensbidrag (refereegranskat)abstract
- Applications on a future Internet of Things require the provisioning of current, relevant and accurate context information to end-points. Context information existing globally require organization into object-oriented models available locally in APIs as current, relevant and accurate views. Moreover, such applications require support for the highly dynamic interactions influencing continual changes in global context information. Existing approaches, such as the web services, are unable to provide this support partly due to the presupposed existence of a network service brokering context information, relying on DNS; or adopting a presence model for context which does not adequately scale. To this end, we propose a distributedframework for the interconnection of end-points and co-located agent entities, whereby agents are provided with local views of a relevant subset of global context information. We show how to achieve relevant local current views of global context information via ranking in an object-oriented context model. The distributed approach realizes the provisioning of context information in real-time, i.e., with predictable time bounds. Finally, we demonstrate the feasibility of the approach in a prototype based on P-Grid. © 2012 ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering.
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| 4. |
- Walters, Jamie, et al.
(författare)
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Evolving Presentity-Based Context Schemas by Estimating Context Proximity
- 2012
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Ingår i: Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering. - Berlin, Heidelberg : Springer. - 9783642323034 ; , s. 137-152
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Konferensbidrag (refereegranskat)abstract
- The definition of what constitutes context proximity has remained largely unexplored but accepted as being a fundamental issue towards realising an architecture of connected things. Existing solutions aimed at enabling context awareness are often undermined by their dependencies on centralized architectures limited with respect to their scalability. Our previous work proposed the use of the so called Context Schema; an encapsulated representation of the information points constituting the context of a presentity. Building such a schema requires support for determining set members limited by some metric; a proximity metric. In this paper, we propose an algorithm for estimating the context proximity among presentities, enabling complete schemata of entities relevant to, and expressing the current context of a presentity. Secondly we propose an extension of a gossiping algorithm to optimize the ability create schemata as one traverses a vast and dynamic connected things infrastructure. © 2012 ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering.
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