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Wireless Personal Communications

, Volume 74, Issue 1, pp 1–21 | Cite as

Effective Prediction for Video Traffic in Joint WiMAX/Satellite Networks

  • Anastasia Lygizou
  • Nikos Passas
  • Spyros Xergias
  • Lazaros Merakos
Article

Abstract

Combining WiMAX with satellite networks can be advantageous, especially in rural areas or locations affected by environmental factors. However, a satellite network experiences large round trip delays that may deteriorate quality especially for real-time applications. This paper improves the video prediction mechanism used for prediction of the uplink real-time traffic of an integrated satellite and WiMAX network. After a bibliographic search on mechanisms for video prediction in WiMAX and satellite networks, the NLMS (normalized least mean square) algorithm is chosen to be used as part of the existing mechanism, studying three possible alternatives. The first one proposes the implementation of the NLMS algorithm in the WiMAX BS (base station), the second one proposes the implementation of the NLMS algorithm in the satellite terminal, while the third one proposes the implementation of the NLMS algorithm in both the WiMAX BS and the satellite terminal. Simulation results show improved performance of all alternatives, while the best results are given by the second one which also has the lowest complexity in computations and memory.

Keywords

DVB-RCS WiMAX QoS rtPS Video prediction 

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Copyright information

© Springer Science+Business Media, LLC. 2012

Authors and Affiliations

  • Anastasia Lygizou
    • 1
  • Nikos Passas
    • 1
  • Spyros Xergias
    • 1
  • Lazaros Merakos
    • 1
  1. 1.University of AthensAthensGreece

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