Session Description Protocol (SDP) Extension For Setting Audio and Video Media Streams Over Circuit-Switched Bearers In The Public Switched Telephone Network (PSTN)
draft-ietf-mmusic-sdp-cs-20
The information below is for an old version of the document | |||
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Document | Type | Active Internet-Draft (mmusic WG) | |
Authors | Miguel GarcĂa , Simo Veikkolainen | ||
Last updated | 2013-06-06 | ||
Replaces | draft-garcia-mmusic-sdp-cs | ||
Stream | IETF | ||
Intended RFC status | Proposed Standard | ||
Formats | pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Flemming Andreasen | ||
IESG | IESG state | IESG Evaluation::AD Followup | |
Consensus Boilerplate | Unknown | ||
Telechat date |
Needs a YES. Needs 9 more YES or NO OBJECTION positions to pass. |
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Responsible AD | Gonzalo Camarillo | ||
IESG note | Flemming Andreasen (fandreas@cisco.com) is the document shepherd. | ||
Send notices to | mmusic-chairs@tools.ietf.org, draft-ietf-mmusic-sdp-cs@tools.ietf.org | ||
IANA | IANA review state | Version Changed - Review Needed |
MMUSIC WG M. Garcia-Martin Internet-Draft Ericsson Intended status: Standards Track S. Veikkolainen Expires: December 08, 2013 Nokia June 06, 2013 Session Description Protocol (SDP) Extension For Setting Audio and Video Media Streams Over Circuit-Switched Bearers In The Public Switched Telephone Network (PSTN) draft-ietf-mmusic-sdp-cs-20 Abstract This memo describes use cases, requirements, and protocol extensions for using the Session Description Protocol (SDP) Offer/Answer model for establishing audio and video media streams over circuit-switched bearers in the Public Switched Telephone Network (PSTN). 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 December 08, 2013. Copyright Notice Copyright (c) 2013 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 Garcia-Martin & VeikkolaExpires December 08, 2013 [Page 1] Internet-Draft PSTN Circuit-Switched Bearers in SDP June 2013 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Conventions Used in This Document . . . . . . . . . . . . . . 4 3. Requirements . . . . . . . . . . . . . . . . . . . . . . . . 4 4. Overview of Operation . . . . . . . . . . . . . . . . . . . . 5 4.1. Example Call Flow . . . . . . . . . . . . . . . . . . . . 5 5. Protocol Description . . . . . . . . . . . . . . . . . . . . 7 5.1. Level of Compliance . . . . . . . . . . . . . . . . . . . 7 5.2. Extensions to SDP . . . . . . . . . . . . . . . . . . . . 7 5.2.1. Connection Data . . . . . . . . . . . . . . . . . . . 7 5.2.2. Media Descriptions . . . . . . . . . . . . . . . . . 8 5.2.3. Correlating the PSTN Circuit-Switched Bearer with SDP 10 5.2.3.1. The "cs-correlation" attribute . . . . . . . . . 11 5.2.3.2. Caller-ID Correlation Mechanism . . . . . . . . . 11 5.2.3.3. User-User Information Element Correlation Mechanism . . . . . . . . . . . . . . . . . . . . 12 5.2.3.4. DTMF Correlation Mechanism . . . . . . . . . . . 14 5.2.3.5. Extensions to correlation mechanisms . . . . . . 15 5.3. Negotiating the correlation mechanisms . . . . . . . . . 15 5.3.1. Determining the Direction of the Circuit-Switched Bearer Setup . . . . . . . . . . . . . . . . . . . . 15 5.3.2. Populating the cs-correlation attribute . . . . . . . 16 5.3.3. Considerations on correlations . . . . . . . . . . . 17 5.4. Considerations for Usage of Existing SDP . . . . . . . . 18 5.4.1. Originator of the Session . . . . . . . . . . . . . . 18 5.4.2. Contact information . . . . . . . . . . . . . . . . . 18 5.5. Considerations for Usage of Third Party Call Control (3PCC) . . . . . . . . . . . . . . . . . . . . . . . . . 19 5.6. Offer/Answer mode extensions . . . . . . . . . . . . . . 19 5.6.1. Generating the Initial Offer . . . . . . . . . . . . 19 5.6.2. Generating the Answer . . . . . . . . . . . . . . . . 21 5.6.3. Offerer processing the Answer . . . . . . . . . . . . 24 5.6.4. Modifying the session . . . . . . . . . . . . . . . . 26 5.7. Formal Syntax . . . . . . . . . . . . . . . . . . . . . . 26 6. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . 27 6.1. Single PSTN audio stream . . . . . . . . . . . . . . . . 27Show full document text