European Space Agency

SIMPLE - Satellite Interactive Multimedia Platform for Low-cost Earth-stations


The target of SiMPLE was the development of new services:

  • Automatic multicast Web cache content updating

  • Automatic selection and delivery of content

  • Decentralised software system for distribution of information

  • Easy and efficient method of multicasting multimedia Internet content


The advantages of the SiMPLE Software System are:

  • Tremendous saving of (satellite) bandwidth

  • One-to-many delivery of any content

  • Sophisticated filtering and selection both at server and client

  • Seamless integration into standard proxy configurations

  • Avoiding problems introduced by TCP over Satellite through two new, state-of-the-art protocols, ODC and RRMP

  • Built upon reliable IPmulticast and UDP

  • Suitable for any content distributor, e.g. ISPs or companies with many scattered sites


The results of SiMPLE Software System developments are:

  • Multicast proxies

  • In advance selection and delivery services

  • Scalable and reliable multicast protocols

  • Single user and Multiple user client proxies

  • Integrated front-end applications, mostly Web-based

  • Flexible and secured system maintenance and monitoring

  • Linux and Windows 95/98/NT4.0 based clients

  • Generation of user profiles at server and client side for optimized content distribution




Currently SiMPLE is in its Beta-test phase lasting from July 15th, 1999 until November 15th, 1999.

Official prices and licencing information will be available 4Q99.

Current status

The Project Implementation Review was held in Salzburg on July 1999.


Status date

Thursday, November 29, 2012 - 14:17