Live multimedia streaming is becoming one of the dominant sources of internet traffic, much of which is sent over best-effort networks, i.e. along paths with a wide variety of characteristics. The multimedia traffic should be transmitted using a robust and effective congestion control mechanism to protect the network from congestion collapse. The RTP Circuit Breaker (RTP-CB) is a candidate solution that causes a sender to cease transmission when RTCP message feedback indicates excessive congestion. This paper studies RTP/UDP video traffic and the impact of its bursty behaviour on the network. It considers the potential limitations of using a RTP-CB with video traffic. We found that the bursty nature of a typical video flow can cause the RTP-CB to either prematurely cease transmission or to react too late. To reduce the likelihood of this happening, we suggest the use of a smoothing buffer in conjunction with the RTP-CB and propose design criteria for this buffer. Our experiments confirm the effectiveness of the proposed approach for different video streams.
FOUGH, N., VERDICCHIO, F. and FAIRHURST, G. 2013. Exploration of RTP circuit breaker with applications to video streaming. In Proceedings of the 14th Annual postgraduate symposium on the convergence of telecommunications, networking and broadcasting 2013 (PGNET 2013), 24-25 June 2013, Liverpool, UK. Liverpool: Liverpool John Moores University. Hosted on Academia [online]. Available from: https://www.academia.edu/5546559/Exploration_of_RTP_Circuit_Breaker_with_Applications_to_Video_Streaming