SDP for the WebRTC
draft-ietf-rtcweb-sdp-00

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Document Type Active Internet-Draft (rtcweb WG)
Last updated 2015-09-17
Replaces draft-nandakumar-rtcweb-sdp
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Intended RFC status Informational
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Network Working Group                                      S. Nandakumar
Internet-Draft                                               C. Jennings
Intended status: Informational                                     Cisco
Expires: March 20, 2016                               September 17, 2015

                           SDP for the WebRTC
                        draft-ietf-rtcweb-sdp-00

Abstract

   The Web Real-Time Communication [WebRTC] working group is charged to
   provide protocol support for direct interactive rich communication
   using audio, video and data between two peers' web browsers.  With in
   the WebRTC framework, Session Description protocol (SDP) [RFC4566] is
   used for negotiating session capabilities between the peers.  Such a
   negotiation happens based on the SDP Offer/Answer exchange mechanism
   described in [RFC3264].

   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 SDP examples provided in this document is still a work in
   progress, but it aims to align closest to the evolving standards
   work.

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 http://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 March 20, 2016.

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Copyright Notice

   Copyright (c) 2015 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://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 the WebRTC  . . . . . . . . . . . . . . . . . . . . .   3
   4.  Offer/Answer and the WebRTC . . . . . . . . . . . . . . . . .   5
   5.  WebRTC Session Description Examples . . . . . . . . . . . . .   6
     5.1.  Some Conventions  . . . . . . . . . . . . . . . . . . . .   7
     5.2.  Basic Examples  . . . . . . . . . . . . . . . . . . . . .   8
       5.2.1.  Audio Only Session  . . . . . . . . . . . . . . . . .   8
       5.2.2.  Audio/Video Session . . . . . . . . . . . . . . . . .  11
       5.2.3.  Data Only Session . . . . . . . . . . . . . . . . . .  16
       5.2.4.  Audio Call On Hold  . . . . . . . . . . . . . . . . .  19
       5.2.5.  Audio with DTMF Session . . . . . . . . . . . . . . .  23
       5.2.6.  One Way Audio/Video Session - Document Camera . . . .  27
       5.2.7.  Audio, Video Session with BUNDLE Support Unknown  . .  31
       5.2.8.  Audio, Video and Data Session . . . . . . . . . . . .  38
       5.2.9.  Audio, Video Session with BUNDLE Unsupported  . . . .  43
       5.2.10. Audio, Video BUNDLED, but Data (Not BUNDLED)  . . . .  47
       5.2.11. Audio Only, Add Video to BUNDLE . . . . . . . . . . .  52
     5.3.  MultiResolution, RTX, FEC Examples  . . . . . . . . . . .  59
       5.3.1.  Sendonly Simulcast Session with 2 cameras and 2
               encodings     per camera  . . . . . . . . . . . . . .  59
       5.3.2.  Successful SVC Video Session  . . . . . . . . . . . .  65
       5.3.3.  Successful Simulcast Video Session with
               Retransmission  . . . . . . . . . . . . . . . . . . .  70
       5.3.4.  Successful 1-way Simulcast Session with 2 resolutions
               and         RTX - One resolution rejected . . . . . .  74
       5.3.5.  Simulcast Video Session with Forward Error Correction  79
     5.4.  Others  . . . . . . . . . . . . . . . . . . . . . . . . .  83
       5.4.1.  Audio Session - Voice Activity Detection  . . . . . .  83
       5.4.2.  Audio Conference - Voice Activity Detection . . . . .  86
       5.4.3.  Successful legacy Interop Fallback with bundle-only .  90

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