Service Composition Scenarios for Next Generation Networks Bhaskaran Raman, ICEBERG, EECS, U.C.Berkeley Presentation at Siemens, Munich, June 2001

Background Operational Model: –Independent service providers deploy independent services in the network –Portal providers, or service brokers, combine these services to enable new functionality Subscriber user Service broker Service mgt. Access network operator Core network operator Value added service providers Value added service providers Value added service providers Content providers Content providers Content providers

Outline Day in the life of a student –Scenario descriptions –Diagrammatic representation of scenarios –Control relationships between services –Data flow Summary and discussion

Scenario 1: Check bus-schedule at bus-stop Cellular-phone GPS service to find user location Bus schedule on the web Traffic conditions on bus route SMS Gateway to send estimated time of arrival of bus Service portal

Scenario 2: Pay bus-fare Cellular-phone Service portal Authentication service to check for student discount Online banking service for making payment SMS Gateway to send confirmation

Scenario 3: Streaming music on PDA PDA Service portal Personal preference service to get user’s favorite music Streaming media server Transcoding service Online CD store to extract prices Proxy service

Scenario 4: Important pushed to cellular-phone Cellular-phone Service portal Texttospeech Transcoding service Gateway service

Scenario 5: Streaming video on handheld/PC PDA Service portal PC at home Transcoding service Video-on-demand system with school lectures Redirection service

Scenario 6: Networked game, with Picture-in-Picture PC at home Service portal Game server News extraction service – insert news headlines at the bottom of game-screen

Types of Services Data sources –Web server –Streaming media server –Game server Transformation agents –Transcoding –Rate-adaptation –Adding content (ad insertion) –Text-to-Speech Redirection service Gateway services

Types of Services (Continued) Security/authentication service Location service (GPS) Storage services –Preference/registry –Files –Databases (e.g., online bank) Caching services Billing service (3 rd party billing) End-client Billing service (metering) Data source

Discussion Topics Type and granularity of composable services –Codecs, Storage, Search, Caching… –Is this reasonable? For a single service provider, what are the arguments for distributing a service, rather than centralizing it? –Ease of management versus availability/performance benefits Compute servers, possibly provided by third party required for composable services –Is this reasonable? What is the commercial activity on this front?

Discussion Topics (Continued) Billing service –Can this be a third party service? –Is this approach taken in current networks? Is there a technical argument for service composition? –Separation of functionality, and ease of management, are business model arguments Other composable services? Other applications involving service composition?

Discussion Topic List Type and granularity of composable services –Codecs, Storage, Search, Caching… –Is this reasonable? For a single service provider, what are the arguments for distributing a service, rather than centralizing it? –Ease of management versus availability/performance benefits Compute servers, possibly provided by third party required for composable services –Is this reasonable? What is the commercial activity on this front? Billing service –Can this be a third party service? –Is this approach taken in current networks? Is there a technical argument for service composition? –Separation of functionality, and ease of management, are business model arguments Other composable services? Other applications involving service composition?

Feedback Splitter service – when a device gets access to an additional network (wavelan) – send video on wavelan, continue audio on cellular network