Proxy‐assisted P2P and multicast transmission schemes for layered‐video streaming over wireless networks
Yung‐Cheng Kao, Chung‐Nan Lee · International Journal of Communication Systems · 2009
Abstract This work describes the process of efficiently streaming a set of layered‐videos from a remote server via proxy of the base station to multiple heterogeneous and asynchronous clients in wireless networks, such as the WiMAX network, which are devices that request different layers of the video according to their profiles. The process focuses on that the transmission cost savings for cachingXlayers of a video are not only from requests onXlayers, but also from requests on layers that are lower thanXlayers. A set of proxy‐assisted transmission schemes are proposed for layered‐video streaming by integrating the proxy caching with reactive transmission schemes, peer‐to‐peer mesh networks and base station multicast capability. The optimal proxy prefix cache allocation is calculated for each transmission scheme to identify the cache layer and cache length of each video to minimize the aggregate transmission cost. Experimental results demonstrate that an adaptive proxy‐assisted transmission scheme can lead to significant transmission cost savings. Copyright © 2009 John Wiley & Sons, Ltd.