37th Annual IEEE Conference on Local Computer Networks (2012)
Clearwater Beach, FL, USA USA
Oct. 22, 2012 to Oct. 25, 2012
Tomas Kupka , University of Oslo, Simula Research Laboratory, Norway
Pal Halvorsen , University of Oslo, Simula Research Laboratory, Norway
Carsten Griwodz , University of Oslo, Simula Research Laboratory, Norway
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, we analyze the TCP performance of such live on-off sources, and we investigate possible improvements in order to increase the resource utilization on the server side. We observe that the problem is the bandwidth wastage because of the synchronization of the on period. We investigate four different techniques to mitigate this problem. We first evaluate the techniques on pure on-off traffic using a fixed quality and then repeat the experiments with quality adaptation.
TV, Protocols, Performance evaluation, TCP, live HTTP streaming, adaptation strategy
T. Kupka, P. Halvorsen and C. Griwodz, "Performance of on-off traffic stemming from live adaptive segmented HTTP video streaming," 37th Annual IEEE Conference on Local Computer Networks(LCN), Clearwater Beach, FL, USA USA, 2012, pp. 401-409.