| 1. |
- Dobslaw, Felix, 1983-, et al.
(författare)
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An Object-Oriented Model in Support of Context Aware Mobile Applications
- 2010
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Ingår i: Mobile Wireless Middleware, Operating Systems, and Applications. - Berlin Hedielberg : Springer Verlag. - 9783642177576
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Konferensbidrag (refereegranskat)abstract
- Intelligent and context-aware mobile services require users and applications to share information and utilize services from remote locations. Thus, context information from the users must be structured and be accessible to applications running in end-devices. In response to this challenge, we present a shared object-oriented meta model for a persistent agent environment. The approach enables agents to be context aware facilitating the creation of ambient intelligence demonstrated by a sensor-based scenario. The agents are context-aware as agent actions are based upon sensor information, social information, and the behavior of co-agents.
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| 2. |
- Forsström, Stefan, et al.
(författare)
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Dissemination of Anonymised Context Information by Extending the DCXP Framework
- 2010
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Ingår i: Lecture Notes of the Institute for Computer Sciences Social Informatics and Telecommunications Engineering Volume 32. - : Springer. ; , s. 57-66
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Konferensbidrag (refereegranskat)abstract
- The increasing ubiquity of context aware services and systems has been primarily underpinned by the use of centralised servers employing protocols that do no scale well for real time distribution and acquisition of neither sensor data nor dependent services.Any shift from this generic sensor framework mandated a new thinking where sensor data was capable of being propagated in real time using protocols and data models which serve to reduce unnecessary communication overhead. DCXP is proposed as an alternative architecture for the real time distribution of context information to ubiquitous mobile services.As a P2P based distributed protocol, it inherently poses the challenge of user anonymity across the system. In this paper we briefly present DCXP along with further work to enable the anonymised dissemination of sensor information within the architecture.Such a solution would have a negligible impact on the overall scalability and performance of DCXP.
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| 3. |
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| 4. |
- Forsström, Stefan, et al.
(författare)
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Location-Based Ubiquitous Context Exchange in Mobile Environments
- 2010
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Ingår i: Lecture Notes of the Institute for Computer Sciences Social Informatics and Telecommunications Engineering Vol 68. - : Springer. ; , s. 177-187
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Konferensbidrag (refereegranskat)abstract
- Context-aware applications and services require ubiquitous access to context information of users. The limited scalability of centralized servers used in the provisioning of context information mandates the search for scalable peer-to-peer protocols. Furthermore, unnecessary signaling must be avoided in large-scale context networks, when location-based services only require nodes in a certain area with which to communicate context. To this end, we propose a lightweight model for composing and maintaining unstructured location-scoped networks of peer-to-peer nodes, which gossips in order to ensure quality of service for each user. The model is implemented in a prototype application running in a mobile environment, which is evaluated with respect to real-time properties. This model can also be extended to include more context dimensions, other than location.
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| 5. |
- 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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| 6. |
- Kanter, Theo, 1954-, et al.
(författare)
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Distributed Context Support for Ubiquitous Mobile Awareness Services
- 2009
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Ingår i: 2009 Fourth International ICST Conference on Communications and Networking in China. ChinaCom'09.. - : IEEE conference proceedings. - 9781424443376 ; , s. 869-873
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Konferensbidrag (refereegranskat)abstract
- Context-aware applications and services require ubiquitous access to context information about the users or sensors such as preferences, spatial & environmental data, available connectivity, and device capabilities. Systems for the brokering or the provisioning of context data via wireless networks do so with centralized servers or by employing protocols that do not scale well with real-time distribution capabilities. In other cases, such as the extending of presence systems, the data models are limited in expressive capabilities and consequently incur unnecessary signaling overhead. This paper presents a distributed protocol, the Distributed Context eXchange Protocol (DCXP), and an architecture for the real-time distribution of context information to ubiquitous mobile services: We present the architecture and its principle operation in a sample ubiquitous mobile awareness service. Preliminary results indicate that our approach scales well for the ubiquitous provision of context data in real-time to clients on the Internet via 3G wireless systems. Performed measurements show that DCXP can reduce the time to process context data with a factor of 20 compared to similar approaches.
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| 7. |
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| 8. |
- Kanter, Theo, et al.
(författare)
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Distributed Immersive Participation as Crowd-Sensing in Culture Events
- 2014
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Ingår i: Journal of Virtual Worlds Research. - : Virtual Worlds Institute, Inc.. - 1941-8477. ; 7:2
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Tidskriftsartikel (refereegranskat)abstract
- This article investigates new forms for creating and enabling massive and scalable participatory immersive experiences in live cultural events, characterized by processes, involving pervasive objects, places and people. The multi-disciplinary research outlines a new paradigm for collaborative creation and participation towards technological and social innovation, tapping into crowd-sensing. The approach promotes user-driven content-creation and offsets economic models thereby rewarding creators and performers. In response to these challenges, we propose a framework for bringing about massive and real-time presence and awareness on the Internet through an Internet-of-Things infrastructure to connect artifacts, performers, participants and places. Equally importantly, we enable the in-situ creation of collaborative experiences building on relevant existing and stored content, based on decisions leveraging multi-criteria clustering and proximity of pervasive information, objects, people and places. Finally, we investigate some new ways for immersive experiences via distributed computing but pointing forward to the necessity to do more with regard to collaborative creation.
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| 9. |
- Kanter, Theo, et al.
(författare)
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Scenarios, Research Issues, and Architecture for Ubiquitous Sensing
- 2010
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Ingår i: Mobile Networks and Management. - Berlin, Heidelberg : Springer Berlin Heidelberg. ; , s. 285-297, s. 285-297
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Konferensbidrag (refereegranskat)abstract
- This paper describes research issues and work-in-progress concerning ubiquitous sensing. We present scenarios where the current approaches are deficient in addressing the needs for ubiquitous sensing in services and applications on the Future Internet, involving the massive sharing of information from sensors via heterogeneous networks. We propose an information-centric architecture for real-time ubiquitous sensing which capitalizes on the proposed locator/identifier split, thus extending the Network of Information (NetInf) approach. From this we identify the challenges for which we present work-in-progress within the framework of the EU-funded MediaSense project. Firstly, we integrate sensors as addressable objects, exposed by means of sensor gateways and relocatable abstract interfaces. Sensor information is thus made available to applications solely based on identity. Secondly, sensor information is made available in a distributed data model towards searching and browsing. Finally, we evaluate the effectiveness of the architecture in proof-of-concept applications for intelligent commuting, environmental monitoring and seamless media transfer, utilizing two different sensor platforms.
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| 10. |
- Kanter, Theo, 1954-, et al.
(författare)
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The MediaSense Framework
- 2009
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Ingår i: Proceedings - 2009 4th International Conference on Digital Telecommunications, ICDT 2009. - New York : IEEE conference proceedings. - 9780769536958 ; , s. 144-147
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Konferensbidrag (refereegranskat)abstract
- Mobile telecommunication is evolving rapidly. People no longer only communicate with each other regardless of time and place, but also share other information that is important for tasks with which they are involved. In response to this growing trend the MediaSense framework addresses the intelligent delivery of any information to any host, anywhere, based on context-aware information regarding personal preferences, presence information, and sensor values. This includes another challenge to achieve seamless delivery, especially of multimedia content, and multimodal services via heterogeneous connections.
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