7th Summer School on Telecommunications Lappeenranta August Calypso - Broadband Service Architecture 7th Summer School on Telecommunications Juhana Räsänen Helsinki University of Technology Laboratory of Telecommunications Software and Multimedia

7th Summer School on Telecommunications Lappeenranta August Calypso - Broadband Service Architecture Background Research team at the TCM laboratory of HUT, lead by prof. Olli Martikainen Standard ATM/B-ISDN architecture seemed rigid and complicated New ideas for a service architecture started to form in the end of 1996 Calypso project was officially started in May 1997, funding by TEKES and companies

7th Summer School on Telecommunications Lappeenranta August Calypso - Broadband Service Architecture What were the problems? What will the actual broadband services be? In what kind of networks will those services be delivered? The role and importance of the Internet? Business model: who will provide what? Are B-ISDN and IN based services enough, and if not, what would an alternative service architecture look like?

7th Summer School on Telecommunications Lappeenranta August Calypso - Broadband Service Architecture Scenario Backbone STB ? Network operatorCustomers Service and content providers

7th Summer School on Telecommunications Lappeenranta August Calypso - Broadband Service Architecture Players Customers (private households) buy services produced by service and content providers Network operator offers the infrastructure: –Fibers, cables, switches, routers, etc. –Service platform, on top of which the service providers are able to implement their services Service and content providers are independent of the network operator

7th Summer School on Telecommunications Lappeenranta August Calypso - Broadband Service Architecture Service requirements Service functionality is distributed between clients, servers and the network Services are able to control the network directly through an API Services can be dynamically injected and updated into the network The network must be able to execute 3rd party service code securely

7th Summer School on Telecommunications Lappeenranta August Calypso - Broadband Service Architecture Calypso platform TCP/IP An active, controllable network element An API for connection management Execution environment for 3rd party services Networking over TCP/IP Java as programming language Network API Service JavaVM + framework Control workstation Switch, router, firewall…

7th Summer School on Telecommunications Lappeenranta August Calypso - Broadband Service Architecture Services in Calypso Network component (agent) executed in the Calypso platform execution environment Client component in the end user terminal Client can request the service from the agent using any method that works over TCP/IP The agent controls the network using the API defined by the Calypso platform Certificate-based access control

7th Summer School on Telecommunications Lappeenranta August Calypso - Broadband Service Architecture Example: ISP service STB / PC Calypso platform Internet Service Agent Client Agent Appl Internet Applications Daemon The Internet Router / firewall Access switchEnd user terminal

7th Summer School on Telecommunications Lappeenranta August Calypso - Broadband Service Architecture Certificate-based access control Certificate = cryptographically signed object that lists allowed operations for the holder Service providers buy certificates from the network operator for service deployment SPs sell certificates to the customers for the service access The Calypso execution environment parses the certificates and grants access rights

7th Summer School on Telecommunications Lappeenranta August Calypso - Broadband Service Architecture Summary Calypso service functionality is distributed Services are programmed as regular Java applications, using Calypso APIs Services can be installed dynamically into the network utilizing Java code mobility Certificate-based access control allows easy and secure trade of network resources and services as well as secure execution of 3rd party service code

7th Summer School on Telecommunications Lappeenranta August Calypso - Broadband Service Architecture Current Calypso Basic platform, capable of controlling a network of VTT’s FSR ATM switches Web server with servlet support, used by the other services for management functions Prototype services: ISP service, multicast media stream delivery, “PBX” “Everything is services” -principle: services are composed of other, lower-level services

7th Summer School on Telecommunications Lappeenranta August Calypso - Broadband Service Architecture The future? Service creation, delivery and billing must be easy, secure and flexible for all participants Multicast services will become important, eg. digital TV delivery over broadband networks The Internet will continue to grow Calypso will continue the development of the platform suitable for future service execution Jini TM and NanoServer by Sun?