© Siemens AG 2001 Software & Systems Architectures - Mobile Computing Proposed Research Topics Cooperation between Siemens and UCB March 27, 2001 Visit of Prof. Katz and Prof. Joseph at CT SE 2

© Siemens AG Software & Systems Architectures - Mobile Computing Service Composition  Def.: Service composition/aggregation = combine low-level basic services to high-level composite services in a dynamic fashion  Subtopics:  Description format/language for service interfaces and properties  Description format/language for service interrelations/interactions  Loose vs. tight coupling of basic services  Preservation of consistency within higher-level services  Matching of services based on service capabilities and user preferences  Cross-section topics:  Security issues  Physical distribution of service space (server vs. client / download)  Technical foundations for new business models  Time frame: 6 – 12 months (depends on level of detail and experience of student) Contact:

© Siemens AG Software & Systems Architectures - Mobile Computing Security & Acceptance of Context-aware Systems  Area of Interest  Context-aware Applications in the Mobile Internet  Example: Weather Information for tomorrow  Open Issues  Users have reservations against context being collected about them and used by untrusted applications  Proposed Concepts  Access Control to Context has to be introduced  Context should be stored „near“ the user  Engines to personalize Applications without revealing Context  Suggested Task  Identification of current situation (use of context, parties involved)  Consideration of cultural aspects (e.g. privacy, security)  Derivation of typical scenarios, requirements for future architectures  Design and implementation of software component Contact:

© Siemens AG Software & Systems Architectures - Mobile Computing Value based Pricing for Mobile Multimedia Services  Future Mobile Networks:  Different services  Current billing schemes do not work  => Pricing based on content needed  Sample Problems:  How to differentiate content?  How to handle interrupted downloads  How to handle prepaid accounts?  Proposed work:  Determine requirements of users/ operators/ service providers and suggest/ prototype solutions Contact: