SDP-based Data Channel Negotiation
draft-ietf-mmusic-data-channel-sdpneg-05

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Document Type Active Internet-Draft (mmusic WG)
Last updated 2015-10-14 (latest revision 2015-10-05)
Replaces draft-ejzak-mmusic-data-channel-sdpneg
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MMUSIC                                                     K. Drage, Ed.
Internet-Draft                                               M. Makaraju
Intended status: Standards Track                     J. Stoetzer-Bradler
Expires: April 7, 2016                                    Alcatel-Lucent
                                                                R. Ejzak
                                                               J. Marcon
                                                            Unaffiliated
                                                         October 5, 2015

                   SDP-based Data Channel Negotiation
                draft-ietf-mmusic-data-channel-sdpneg-05

Abstract

   The Real-Time Communication in WEB-browsers (RTCWeb) working group is
   charged to provide protocols to support direct interactive rich
   communications using audio, video, and data between two peers' web-
   browsers.  For the support of data communication, the RTCWeb working
   group has in particular defined the concept of bi-directional data
   channels over SCTP, where each data channel might be used to
   transport other protocols, called sub-protocols.  Data channel setup
   can be done using either the in-band Data Channel Establishment
   Protocol (DCEP) or using some out-of-band non-DCEP protocol.  This
   document specifies how the SDP offer/answer exchange can be used to
   achieve such an out-of-band non-DCEP negotiation.  Even though data
   channels are designed for RTCWeb use initially they may be used by
   other protocols like, but not limited to, the CLUE protocol.  This
   document is intended to be used wherever data channels are used.

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
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on April 7, 2016.

Drage, et al.             Expires April 7, 2016                 [Page 1]
Internet-Draft     SDP-based Data Channel Negotiation       October 2015

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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Applicability Statement . . . . . . . . . . . . . . . . . . .   5
   5.  SDP Offer/Answer Negotiation  . . . . . . . . . . . . . . . .   5
     5.1.  SDP Syntax  . . . . . . . . . . . . . . . . . . . . . . .   5
       5.1.1.  SDP Attribute for Data Channel Parameter Negotiation    5
         5.1.1.1.  dcmap Attribute . . . . . . . . . . . . . . . . .   5
         5.1.1.2.  dcmap Multiplexing Category . . . . . . . . . . .   7
         5.1.1.3.  dcmap-stream-id Parameter . . . . . . . . . . . .   7
         5.1.1.4.  label Parameter . . . . . . . . . . . . . . . . .   7
         5.1.1.5.  subprotocol Parameter . . . . . . . . . . . . . .   8
         5.1.1.6.  max-retr Parameter  . . . . . . . . . . . . . . .   8
         5.1.1.7.  max-time Parameter  . . . . . . . . . . . . . . .   8
         5.1.1.8.  ordered Parameter . . . . . . . . . . . . . . . .   8
       5.1.2.  Sub-Protocol Specific Attributes  . . . . . . . . . .   9
         5.1.2.1.  dcsa Attribute  . . . . . . . . . . . . . . . . .   9
         5.1.2.2.  dcsa Multiplexing Category  . . . . . . . . . . .  10
     5.2.  Procedures  . . . . . . . . . . . . . . . . . . . . . . .  10
       5.2.1.  Managing Stream Identifiers . . . . . . . . . . . . .  10
       5.2.2.  Negotiating Data Channel Parameters . . . . . . . . .  11
       5.2.3.  Opening a Data Channel  . . . . . . . . . . . . . . .  12
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