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Dynamic System Adaptability and Context Manipulation

Explore the challenges of context manipulation in adaptive systems, focusing on scalability, performance, and lack of semantic support. Understand the complex relationships between context, profiles, and actors in dynamic environments.

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Dynamic System Adaptability and Context Manipulation

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  1. User/App Characterization Ugur Cetintemel Guerney Hunt Ravi Jain Anupam Joshi Ryu Masuoka Jignesh Patel Jean Scholtz Ouri Wolfson Arkady Zaslavsky

  2. Motivation • Cardinality of the actor set • Dynamic/unpredictable nature of current context • Scalability & performance • Lack of support for semantics in current systems • Complexity of context dependencies

  3. Relationship between context, profile and actors • Name • Colour • Sport • … More control More static profile 1:n or 1:1 ??? actor • Location • Time • Tennis score • … less control less static • Human • Device • Software context

  4. Context • Context abstractions • Using context • Manipulating context information • Interpreting context • Detecting, sensing & discovering context

  5. System Adaptability • Adjustment of the system (actors + context + associations) to dynamic context • Reasons include minimizing cost, optimizing performance, etc • Internal & external adaptation • Monitoring • Reactivity & proactivity • Black box & feedback loop

  6. Priorities, open issues • Association between actors & context • Metacontext ??? Formalisms ??? • Inter- & intra- context dependencies • Storing, Retrieving, Accessing context info • Resource description & discovery • Context privacy & security • Scaling: zillions of actors, context attributes and associations • Minimizing human distraction • Composition, engineering and debugging of pervasive systems

  7. Links • Middleware, OMG • Software engineering , component SE • Telcos(Ericsson, Nokia, Motorola, Siemens) • Wireless networks • Hardware vendors • Operating systems • Software agents & AI • HCI • WWW, semantic web

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