Adaptive Proxy-Assisted Cache Scheme for Multiple-version Video Transmission

Abstract

This work describes the process of efficiently streaming a set of multiple-version videos from a remote server via proxy to a variety of heterogeneous and asynchronous clients that request different quality of the video according to their profiles. The process focuses on reducing transmission cost by caching the optimal version of the video. A set of proxy-based delivery schemes are proposed by integrating the proxy caching with the reactive transmission schemes such as batching or patching. The optimal proxy prefix cache allocation is calculated for each transmission scheme to identify cache length of all versions of each video to minimize the aggregate transmission cost. As a result, it enhances the quality of video transmission. Experimental results demonstrate that for either the batching or patching transmission scheme, the proposed cache scheme can lead to significant transmission cost reduction.