Guidelines for End-to-End Support of the RTP Control Protocol (RTCP) in Back-to-Back User Agents (B2BUAs) (RFC8079)
Original Publication Date: 2017-Feb-01
Included in the Prior Art Database: 2017-Feb-23
Internet Society Requests For Comment (RFCs)
L. Miniero: AUTHOR [+2]
Session Initiation Protocol (SIP) [RFC3261] Back-to-Back User Agents (B2BUAs) are SIP entities that can act as a logical combination of both a User Agent Server (UAS) and a User Agent Client (UAC). As such, their behaviour is not always completely adherent to standards and can lead to unexpected situations. [RFC7092] presents a taxonomy of the most commonly deployed B2BUA implementations and describes how they differ in terms of the functionality and features they provide.
Internet Engineering Task Force (IETF) L. Miniero Request for Comments: 8079 Meetecho Category: Standards Track S. Garcia Murillo ISSN: 2070-1721 Medooze V. Pascual Oracle February 2017
Guidelines for End-to-End Support of the RTP Control Protocol (RTCP) in Back-to-Back User Agents (B2BUAs)
SIP Back-to-Back User Agents (B2BUAs) are often designed to also be on the media path, rather than just to intercept signalling. This means that B2BUAs often implement an RTP or RTP Control Protocol (RTCP) stack as well, thus leading to separate multimedia sessions that the B2BUA correlates and bridges together. If not disciplined, this behaviour can severely impact the communication experience, especially when statistics and feedback information contained in RTCP messages get lost because of mismatches in the reported data.
This document defines the proper behaviour B2BUAs should follow when acting on both the signalling plane and media plane in order to preserve the end-to-end functionality of RTCP.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 7841.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc8079.
al. Standards Track [Page 1]
RFC 8079 RTCP Translation in B2BUAs February 2017
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