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SMART-ITS Résumé de rapport

Project ID: IST-2000-25428
Financé au titre de: FP5-IST
Pays: Finland

Smart-Its context architecture

The project has developed a context architecture for collective context information management of low power wireless sensor modules. This architecture is called smart-it. In our smart-it context architecture previously published SW architectures are merged together in a novel way to manage context information. The smart-it context architecture is the first context managing architecture for collective of low power sensor modules. In the context architecture the context information is handled from artefact perspective.

The developed context architecture offers formal structures to develop context management SW for the application of ubiquitous computing with smart-it technology. It specifies SW architecture structure, API, and information interchange format. It supports also collective context recognition functionality. We think that our context architecture can make application developer’s implementation work easier in several ways. The advances of smart-it context architecture for SW developers:
- Formal architecture structure for context management SW.

- Specified API to access context information: access to context resources of smart-its network.

- Formal context description for interchange.

- Support for implementation of collective features.

- Reuse and maintenance of code is easier.

- Better readability of different developers’ code.

The context architecture enables the formal way to create application specific recognition modules for use of applications. In several application experiments we found that artefact centric context information management is suitable for context aware application of ubiquitous computing.

In general sense, the collectiveness of smart-its enables resource sharing (sensing, computation, memory and computation) to increase performance or to save energy. The single smart-its can also share some context with other smart-its. The collectiveness of artefacts enables new kind of application creation where people can work in ad hoc collectivities.

By using collective context recognition we can achieve several benefits compared to centralized context recognition. Benefits are related to reliability, resource saving and recognition of more complex contexts. More reliable context recognition is one benefit, which can be implemented by using collective features. In that case, several smart-its recognize the same context equally in the same area and results can thus be summarized. Common measurement fact is that several measurements are more reliable than single measurement this is also valid in the case of context recognition. The multiple context recognition increases fault tolerance because one faulty smart-its does not prevent recognition.

The work on context architecture has been published in various conference articles in international scientific conferences. The smart-its context architecture has also been presented in national seminars and conferences.

In concept level, it is possible to apply the ideas of smart-it context architecture in current mobile terminals and embedded computers in the co-operation of device manufacturer.

Negotiations are under way for implementing the context architecture in certain products on mobile phone platform.

Reported by

Technical Research Centre of Finland
Kaitovayla 1
90571 Oulu
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