Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks Calypso: System Components and Tools for Media Distribution over Broadband Networks The 6th Summer School on Telecommunications Juhana Räsänen Helsinki University of Technology Laboratory of Telecommunications Software and Multimedia

Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks Background Research team lead by prof. Olli Martikainen ATM research in TOVE project concentrates on standardised B-ISDN style architectures, which build on the existing technology What is the intent of B-ISDN, what kind of service scenarios are there, who are the customers?

Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks Broadband scenario Backbone network STB ? Access networkDomestic customer

Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks Broadband access network Seamless integration of the Internet-like services and stream-based services Open platform for easy service introduction 100’s of users / switch => lightweight signalling Separation of switching and control

Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks Standard ATM / B-ISDN? Good support and performance for stream-based data transport Opening of the streams: Heavyweight signalling! Intelligent terminals and new service concepts vs. IN Troublesome IP support SAAL Q.2931 MTP-3 BISUP Call Control SCCP TCAP BINAP SCP SDP SSP

Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks IP switching? Good support for IP, but no guaranteed streams The networks will remain heterogeneous: everything is not IP Service architecture? –Authentication –Billing & tariffing –User profiles, service portfolios Flow analysis IP routing

Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks Layered control model Groups control functions that are independent of each other into separate layers Fabric Control: Basic ATM switch control Network Control: End-to-end connectivity, control data transport and path reservation Service Control: Execution environment and interfaces for the service applications

Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks Layered control model SCL FCL NCL SCL FCL NCL User terminal Service client NCL Service agent Fabric control 2 Connection control 3 Service access Service ATM 4 4 Service specific connection setup Clients

Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks Calypso architecture Based on the layered control model Service-oriented: a platform for easy service creation and deployment Distributed service logic using Service Agents in a Java-based environment A Service Execution Environment is needed on top of the generic switching platform

Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks Service Agents Java programs executed in the network nodes by the Service Execution Environment (SEE) Responsible for the management of services Provide interfaces to the services for the user side clients (Service Icons) SCL/SEE FCL ATM/AAL NCL ClientsCalypso node SI ATM/AAL NCL SA Terminal Device Controller workstation

Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks Service Execution Environment An environment for SA development –Class framework –Runtime environment –Helper services and tools (authentication, billing...) The interface between the network operator and service providers Dynamic insertion and removal of service agents

Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks Distribution of service logic Service Agents and Service Icons are used for flexible distribution of functionality Data transport provided by the NCL protocols Interfaces between agents and icons can be implemented using eg. CORBA or RMI (Remote Method Invocation) of Java Icons could be implemented as applets

Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks Implementation Service Execution Point –A Linux workstation Service Execution Environment –Implementation in Java because of mobile code and IP support Network Control Layer –Linux IP stack + path reservation protocol based on RSVP Fabric Control Layer –e.g. GSMP Service IP over ATM SA Linux ATM AAL5 SEP SA GSMP RSVP/A SEE

Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks Stream distribution pilot STB / PC SEE MW SA SI Viewer Channel requests Channels Channel Manager Launch Infrared Remote Control Select

Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks Summary Minimum statically defined functionality in the network nodes - the rest is services Support for several service and control architectures simultaneously Flexible distribution of service logic between network nodes, terminals and servers Gaining experience by prototyping services

Summer School on Telecommunications Lappeenranta August Calypso: System Components and Tools for Media Distribution over Broadband Networks Current and future work The media stream distribution application under implementation, demonstrated in the end of -97 “Virtual PBX” project beginning in the autumn First prototype of a Calypso node and the SEE developed concurrently with the pilot projects Further application and service experimenting in MediaPoli project