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Group 1. “Issues in CA adaptation”

This article explores the main issues in context-aware adaptation, including representing context, attributes, distribution, and mechanisms for static and runtime adaptation. It also discusses identifying relevant context, deciding adaptation activities, and the role of different stakeholders in the adaptation process.

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Group 1. “Issues in CA adaptation”

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  1. Group 1. “Issues in CA adaptation” J. Matevska-Meyer D. Ayed M. Sjölund P. Rigole G. Rey O. Virtanen

  2. Main Issues • Representing Context • Attributes (i.e. similar to metainformation) • XML/database • Ontologies • Standards (CC/PP, OWL etc.) • Distribution • History • Reasoning (from low-level to high-level) • Identifying the relevant context • Identifying the components to be adapted • Deciding/choosing adaptation activities • Mechanisms for actual adaptation: • Static (i.e. design time) • Runtime

  3. Identifying the components to be adapted • Deciding/choosing adaptation activities • Who (signal to change) • Designer • User (depends of the user), presented a list: adapt, don’t adapt • The system • Environment (e.g. a nearby printer) • An application • Why • Change: • System • Requirements (e.g. user) • When • Asap • The system decides its appropriate • Where • Not in Norway…

  4. Mechanisms for actual adaptation • Static (i.e. design time) • Context-aware deployment plan • Semantic compatibility (e.g. would the system satisfy its specification after adaptation) • Runtime • Context-aware deployment plan • Runtime information included • Consistency checks • Component replacement, deletion/addition • Bindings replacement, deletion/addition • Attribute tweaking

  5. Open Issues • Structural change at runtime • Availability, persistency (e.g. keep state) • …

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