csperkins.org

Congestion Control for Real-Time Media

Provision of congestion control is a significant open issue for interactive real-time networked multimedia systems. Numerous congestion control algorithms have been proposed, but they frequently conflict with the demands of interactive multimedia applications. My paper “Building Adaptive Applications: On The Need For Congestion Control” (an invited paper presented at the 17th SPIE/IS&T International Symposium on Electronic Imaging, San Jose, CA, USA, January 2005) outlines some of the issues.

My research has focussed on the effects of jitter and reordering on congestion controlled transport protocols, on TCP friendly rate control, and on the integration of real time applications with the Datagram Congestion Control Protocol (DCCP).

Effects of Jitter and Reordering

Evaluation of the effects of network timing jitter and packet reordering on multimedia applications. Design of congestion control protocols to decouple response to loss and reordering. Comparison with TCP and TCP-Friendly Rate Control.

RTP over DCCP

Developing a mapping of the Real-time Transport Protocol (RTP) onto the Datagram Congestion Control Protocol (DCCP).

Developing a UDP encapsulation of DCCP:

Opinions expressed are my own, and do not represent those of my employers or the organisations that fund my research.