Standards Contributions

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I'm a long-time participant in the Internet Engineering Task Force (IETF). I develop transport protocol and signalling standards, with a focus on real-time networked multimedia. I also work on transport services and APIs for the post-Sockets network, the implications of QUIC on applications and network operations, and how best to specify network protocols.

I'm co-chair of the RTP Media Congestion Avoidance Techniques working group, and previously co-chaired the Audio/Video Transport (1998-2008) and Multiparty Multimedia Session Control (2000-2007) working groups. I was a member of the Transport Area Directorate (2006-2015), and I'm a member of the Transport Area Review Team (2015-).

I contributed to MPEG-4 Systems in the Moving Picture Experts Group of the International Standards Organisation.

RTP: Audio and Video for the Internet

I'm author of RTP: Audio and Video for the Internet (Addison-Wesley, 2003). This book describes protocols and algorithms for transport of real-time multimedia over IP networks. It combines standards and research experience to explain the basics of RTP-based telephony, conferencing and streaming media applications.

Standards News

IETF Contributions by Meeting

I contributed to the following IETF meetings:

IETF Contributions by Name

I'm an author of the following active Internet-drafts:

A complete list of the Internet-drafts that I've worked on is also available.

Published Internet Standards and Other IETF RFCs

I authored the following IETF RFCs:


My participation in the IETF and IRTF has been funded by the following organisations: Rakuten Mobile (2020-2023), EPSRC EP/S036075/1 (2020-2023), EPSRC EP/R04144X/1 (2018-2020), Huawei (2010-2017, 2019-2020), EU StandICT (2018-2019), Ericsson (2009,2012-2014), Cisco (2007-2012), UK National e-Science Centre (2003-2007), NSF #0230738 (2002-2003), DARPA (2000-2003), EU FP4 MERCI and MECCANO (1996-2000).