This paper addresses the problem of streaming packetized

media over a lossy packet network through an intermediate

proxy server to a client, in a rate-distortion optimized way. The

proxy, located at the junction of the backbone network and the

last hop to the client, coordinates the communication between the

media server and the client using hybrid receiver/sender-driven

streaming in a rate-distortion optimization framework. The

framework enables the proxy to determine at every instant which

packets, if any, it should either request from the media server or

(re)transmit directly to the client, in order to meet constraints on

the average transmission rates on the backbone and the last hop

while minimizing the average end-to-end distortion. Performance

gains are observed over rate-distortion optimized sender-driven

systems for streaming packetized video content. The improvement

in performance depends on the quality of the network path both

in the backbone network and along the last hop.

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In  IEEE/ACM Trans. Networking

Publisher  IEEE/ACM Transactions on Networking
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