Networking

Performance of On-Off Traffic Stemming From Live Adaptive Segmented HTTP Video Streaming

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Executive Summary

A large number of live segmented adaptive HTTP video streaming services exist in the Internet today. These quasi-live solutions have been shown to scale to a large number of concurrent users, but the characteristic on-off traffic pattern makes TCP behave differently compared to the bulk transfers the protocol is designed for. In this paper, the authors analyze the TCP performance of such live on-off sources, and they investigate possible improvements in order to increase the resource utilization on the server side. They observe that the problem is the bandwidth wastage because of the synchronization of the on period. They investigate four different techniques to mitigate this problem.

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