© Siemens AG 2001 1 CoC Flexible Service Networking Service Composition – Scenarios and Research Challenges Jochen Sauter Corporate Technology Siemens.

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Presentation transcript:

© Siemens AG CoC Flexible Service Networking Service Composition – Scenarios and Research Challenges Jochen Sauter Corporate Technology Siemens AG Visit of UCB, 06/12/01

© Siemens AG CoC Flexible Service Networking Scenario A: Online Banking Service (Wide-area service infrastructure) Authentication Service ATM Finder Service Accounts Mgmt Service Online Broker Service Service Provider A (Bank) Service Provider B (Online Broker) Service X Service Provider X Wide-area service infrastructure Fixed/Mobile User Service Browser Fixed/Mobile Terminal Wireline/Wireless Access Composite Banking Service Portal Provider (Bank) Service Portal

© Siemens AG CoC Flexible Service Networking Scenario B: Music Service (Local service infrastructure) CD Service HiFi set (fixed) DVD Service DAT Service Jukebox Service Jukebox (fixed) Wireless Access Direct Access Mobile User MP3 Service Portable MP3 player Service Browser Mobile Terminal (PDA, Cell Phone) Composite Music Service Wireless Access Local service infrastructure Transcoding Service Fixed User Service Browser Fixed Terminal (Desktop PC, …) Wireless Access Point

© Siemens AG CoC Flexible Service Networking Core Requirements  Method/Approach to perform/define composition  Efficient and seamless interaction of service building blocks  Composition over provider boundaries  Optimal selection of service path through network  Consistency guarantees during composition  Fault-tolerance and Recovery  End-to-end Security

© Siemens AG CoC Flexible Service Networking Optional Requirements  Uniform look and feel for user  Transparent way of charging/billing/licensing  Use of standard technologies (protocols / formats / languages etc.)  Tool support (visual modeling/composition without need to write program code)

© Siemens AG CoC Flexible Service Networking Research Challenges (I)  Description format/language for building block services:  Service interfaces  Service properties/capabilities  Description format/language for composition:  Service structure (static)  Service collaboration (dynamic)  Constraints which limit composition  High Availability of Services

© Siemens AG CoC Flexible Service Networking Research Challenges (II)  Security issues:  Authentication between two boundaries that provide a composed service together  End-to-end security  Fault-tolerance/Recovery:  Failure of one/several building blocks does not compromise overall function  Self-healing service relationships  Error handling and Crash recovery  Automatic session transfer to other appropriate service

© Siemens AG CoC Flexible Service Networking Research Challenges (III)  Profile-based discovery and matching of services:  Criteria for selection (costs, feature set, availability,...)  Wide Area Discovery protocols  Peer-to-peer discovery  Scalability:  For a large number of users  For a large number of building-block services  Preservation of consistency:  Service contracts / Automated compliance checking  Resolution of conflicts

© Siemens AG CoC Flexible Service Networking Contact at Siemens CT  Jochen Sauter Siemens AG, CT SE 2 Phone: +49 (89)