An Analysis of Two Cooperative Caching Techniques for Streaming Media in Residential Neighborhoods

Abstract

Domical is a recently introduced cooperative caching technique for streaming media (audio and video clips) in wireless home networks. It employs asymmetry of the available link bandwidths to control placement of data across the caches of different devices. A key research question is what are the merits of this design decision. To answer this question, we compare Domical with DCOORD, a cooperative caching technique that ignores asymmetry of network link bandwidths in its caching decisions. We perform a qualitative and quantitative analysis of these two techniques. The quantitative analysis focuses on startup latency defined as the delay incurred from when a device references a clip to the onset of its display. Obtained results show Domical enhances this metric significantly when compared with DCOORD inside a wireless home network. The qualitative analysis shows DCOORD is a scalable technique that is appropriate for networks consisting of many devices. While Domical is not appropriate for such networks, we do not anticipate a home network to exceed more than a handful of wireless devices.

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Cite this paper

@inproceedings{Ghandeharizadeh2009AnAO, title={An Analysis of Two Cooperative Caching Techniques for Streaming Media in Residential Neighborhoods}, author={Shahram Ghandeharizadeh and Shahin Shayandeh and Yasser Altowim and DCOORD Domical}, year={2009} }