7th Summer School on Telecommunications

1
Calypso - Broadband Service Architecture

• 7th Summer School on Telecommunications
• Juhana Räsänen
• Helsinki University of Technology
• Laboratory of Telecommunications Software and
  Multimedia

2
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

3
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?

4
Scenario
?
Backbone
STB
Service and content providers
Network operator
Customers
5
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

6
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

7
Calypso platform
Control workstation

• An active, controllable network element
• An API for connection management
• Execution environment for 3rd party services
• Networking over TCP/IP
• Java as programming language

JavaVM framework
Service
Service
Service
Service
Service
TCP/IP
Network API
Switch, router, firewall
8
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

9
Example ISP service
Internet Service Agent
Internet Applications
Agent
Calypso platform
Appl
Appl
Appl
Daemon
Client
Appl
Appl
STB / PC
Router / firewall
Access switch
End user terminal
The Internet
10
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

11
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

12
Current Calypso

• Basic platform, capable of controlling a network
  of VTTs 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

13
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
• JiniTM and NanoServer by Sun?