Standards Contributions

IETF logo

I've been a long-time participant in the Internet Engineering Task Force (IETF) where I played a key role in developing globally deployed multimedia transport and signalling protocol standards (RTP, SDP) that underpin globally deployed video conferencing and telephony platforms, and contributed to the development of the Transport Services Framework.

I previously co-chaired the RTP Media Congestion Avoidance Techniques (2016-2023), 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-).

IETF logo

I have been Chair of the Internet Research Task Force (IRTF) since 2019. The IRTF is a parallel organisation to the IETF that promotes research of importance to the evolution of the Internet protocols, applications, architecture and technology. In this role, I led the process of chartering the Usable Formal Methods and Research and Analysis of Standard-Setting Processes research groups, promoting a principled approach to protocol specification and a deeper understanding of Internet governance in the IETF. I also managed the IRTF response to the COVID-19 pandemic. As IRTF Chair, I serve as an ex-officio member of the Internet Architecture Board and the RFC Series Approval Board.

I previously 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 (2020-2024), EPSRC EP/S036075/1 (2020-2024), 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).