A Comparison of Block-Based and Clip-Based Cooperative Caching Techniques for Streaming Media in Wireless Home Networks

  • Authors:
  • Shahram Ghandeharizadeh;Shahin Shayandeh

  • Affiliations:
  • Department of Computer Science, University of Southern California, USA 90089;Department of Computer Science, University of Southern California, USA 90089

  • Venue:
  • WASA '09 Proceedings of the 4th International Conference on Wireless Algorithms, Systems, and Applications
  • Year:
  • 2009

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Abstract

Wireless home networks are widely deployed due to their low cost, ease of installation, and plug-and-play capabilities with consumer electronic devices. Participating devices may cache continuous media (audio and video clips) in order to reduce the demand for outside-the-home network resources and enhance the average delay incurred from when a user references a clip to the onset of its display (startup latency). In this paper, we focus on a home network consisting of a handful of devices configured with a mass storage device to cache data. A cooperative caching technique may manage the available cache space at the granularity of either a clip or individual blocks of a clip. The primary contribution of this paper is to evaluate these two alternatives using realistic specifications of a wireless home network, identifying factors that enable one to outperform the other.