TCP Performances in a Hybrid Broadcast/Telecommunication System

  • Davy Darche
  • Francis Lepage
  • Eric Gnaedinger
Conference paper
Part of the IFIP International Federation for Information Processing book series (IFIPAICT, volume 162)


High speed cable/ADSL connections are rapidly becoming the standard for Internet at home. Conversely, mobile network operators only offer low bit rate data services to their 2.5G users, and 3G will not be in full swing for another couple of years. In this context, the cooperation between a mobile telecommunication network and a broadcast network can be a suitable alternative to enhance this offer with high speed e-mail, web browsing, file download or even peer-to-peer services. This paper presents a network architecture based on the coupling of a GPRS uplink with a DVB-T downlink, to provide Internet connectivity for unicast and multicast services. We first study the GPRS network and show the issues raised by specific use of this return channel. Then, we analyse, using simulations, how to tune the TCP parameters to increase the GPRS/DVB-T hybrid network performances. Finally, we describe the network architecture of the deployed system, and evaluate its performances.


Hybrid network cooperation asymmetry TCP GPRS DVB-T 


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Copyright information

© International Federation for Information Processing 2005

Authors and Affiliations

  • Davy Darche
    • 1
  • Francis Lepage
    • 2
  • Eric Gnaedinger
    • 2
  1. 1.TDF 1Metz
  2. 2.CRAN, CNRS UMR 7039Université Henri Poincaré NANCYVandoeuvre-les-Nancy CedexFrance

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