Annotated Example SDP for WebRTC
draft-ietf-rtcweb-sdp-14

Document Type Active Internet-Draft (individual)
Authors Suhas Nandakumar  , Cullen Jennings 
Last updated 2020-12-17
Replaces draft-nandakumar-rtcweb-sdp
Stream IETF
Intended RFC status Informational
Formats plain text xml pdf htmlized (tools) htmlized bibtex
Reviews
Stream WG state Submitted to IESG for Publication
Document shepherd Ted Hardie
Shepherd write-up Show (last changed 2018-10-04)
IESG IESG state IESG Evaluation::AD Followup
Consensus Boilerplate Yes
Telechat date
Has a DISCUSS. Has enough positions to pass once DISCUSS positions are resolved.
Responsible AD Murray Kucherawy
Send notices to Ted Hardie <ted.ietf@gmail.com>
IANA IANA review state Version Changed - Review Needed
Network Working Group                                      S. Nandakumar
Internet-Draft                                               C. Jennings
Intended status: Informational                                     Cisco
Expires: 20 June 2021                                   17 December 2020

                    Annotated Example SDP for WebRTC
                        draft-ietf-rtcweb-sdp-14

Abstract

   The Web Real Time Communications (WebRTC) family of protocols defines
   mechanism for direct interactive rich communication using audio,
   video, and data between two peers' web browsers.  With in the WebRTC
   framework, the Session Description Protocol (SDP) is used for
   negotiating session capabilities between the peers.  Such a
   negotiation happens based on the SDP offer/answer exchange mechanism

   This document provides an informational reference in describing the
   role of SDP and the offer/answer exchange mechanism for the most
   common WebRTC use cases.

   This document makes no changes to the SDP offer/answer exchange
   mechanism.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on 20 June 2021.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Nandakumar & Jennings     Expires 20 June 2021                  [Page 1]
Internet-Draft                 SDP4WebRTC                  December 2020

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents (https://trustee.ietf.org/
   license-info) in effect on the date of publication of this document.
   Please review these documents carefully, as they describe your rights
   and restrictions with respect to this document.  Code Components
   extracted from this document must include Simplified BSD License text
   as described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  SDP and WebRTC  . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Offer/Answer and the WebRTC . . . . . . . . . . . . . . . . .   6
   5.  WebRTC Session Description Examples . . . . . . . . . . . . .   6
     5.1.  Some Conventions  . . . . . . . . . . . . . . . . . . . .   7
     5.2.  Basic Examples  . . . . . . . . . . . . . . . . . . . . .   9
       5.2.1.  Audio Only Session  . . . . . . . . . . . . . . . . .   9
       5.2.2.  Audio/Video Session . . . . . . . . . . . . . . . . .  13
         5.2.2.1.  IPv4 Audio/Video Session  . . . . . . . . . . . .  14
         5.2.2.2.  Dual Stack Audio/Video Session  . . . . . . . . .  19
       5.2.3.  Data-only Session . . . . . . . . . . . . . . . . . .  24
       5.2.4.  Audio Call On Hold  . . . . . . . . . . . . . . . . .  26
       5.2.5.  Audio with DTMF Session . . . . . . . . . . . . . . .  30
       5.2.6.  One-way Audio/Video Session - Document Camera . . . .  34
       5.2.7.  Audio, Video Session with BUNDLE Support Unknown  . .  39
       5.2.8.  Audio, Video, and Data Session  . . . . . . . . . . .  45
       5.2.9.  Audioa andVideo Session with BUNDLE Unsupported . . .  50
       5.2.10. Audio, Video BUNDLED, but Data Not BUNDLED  . . . . .  56
       5.2.11. Audio Only, Add Video to BUNDLE . . . . . . . . . . .  62
     5.3.  MultiResolution, RTX, FEC Examples  . . . . . . . . . . .  70
       5.3.1.  Send-only Simulcast Session with 2 Cameras and 2
               Encodings per Camera  . . . . . . . . . . . . . . . .  70
       5.3.2.  Successful SVC Video Session  . . . . . . . . . . . .  78
       5.3.3.  Successful Simulcast Video Session with
               Retransmission  . . . . . . . . . . . . . . . . . . .  82
       5.3.4.  Successful One-way Simulcast Session with 2 resolutions
               and RTX - One resolution rejected . . . . . . . . . .  88
       5.3.5.  Simulcast Video Session with Forward Error
               Correction  . . . . . . . . . . . . . . . . . . . . .  93
     5.4.  Others  . . . . . . . . . . . . . . . . . . . . . . . . .  99
       5.4.1.  Audio Session - Voice Activity Detection  . . . . . .  99
       5.4.2.  Audio Conference - Voice Activity Detection . . . . . 103
Show full document text