--- 1/draft-ietf-mmusic-sdp-cs-02.txt 2010-02-18 13:10:57.000000000 +0100 +++ 2/draft-ietf-mmusic-sdp-cs-03.txt 2010-02-18 13:10:57.000000000 +0100 @@ -1,21 +1,28 @@ MMUSIC WG M. Garcia-Martin Internet-Draft Ericsson Intended status: Standards Track S. Veikkolainen -Expires: April 25, 2010 Nokia - October 22, 2009 +Expires: August 21, 2010 Nokia + February 17, 2010 Session Description Protocol (SDP) Extension For Setting Up Audio and Video Media Streams Over Circuit-Switched Bearers In The Public Switched Telephone Network (PSTN) - draft-ietf-mmusic-sdp-cs-02 + draft-ietf-mmusic-sdp-cs-03 + +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 to IETF in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. @@ -24,39 +31,48 @@ 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." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. - This Internet-Draft will expire on April 25, 2010. + This Internet-Draft will expire on August 21, 2010. Copyright Notice - Copyright (c) 2009 IETF Trust and the persons identified as the + Copyright (c) 2010 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 in effect on the date of - publication of this document (http://trustee.ietf.org/license-info). - Please review these documents carefully, as they describe your rights - and restrictions with respect to this document. - -Abstract + 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 BSD License. - 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). + This document may contain material from IETF Documents or IETF + Contributions published or made publicly available before November + 10, 2008. The person(s) controlling the copyright in some of this + material may not have granted the IETF Trust the right to allow + modifications of such material outside the IETF Standards Process. + Without obtaining an adequate license from the person(s) controlling + the copyright in such materials, this document may not be modified + outside the IETF Standards Process, and derivative works of it may + not be created outside the IETF Standards Process, except to format + it for publication as an RFC or to translate it into languages other + than English. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Conventions Used in This Document . . . . . . . . . . . . . . 5 3. Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 5 4. Overview of Operation . . . . . . . . . . . . . . . . . . . . 6 4.1. Example Call Flow . . . . . . . . . . . . . . . . . . . . 6 5. Protocol Description . . . . . . . . . . . . . . . . . . . . . 8 5.1. Level of Compliance . . . . . . . . . . . . . . . . . . . 8 @@ -912,45 +927,45 @@ c=IN IP4 192.0.2.5 a=sescap:1 1,3 a=sescap:2 2,4 a=creq:med-v0,ccap-v0 a=acap:1 cs-correlation:uuie:2890W284hAT452612908awudfjang908 a=acap:2 setup:actpass a=acap:3 connection:new a=tcap:1 PSTN m=audio 49170 RTP/AVP 0 8 3 a=mcap:1 - - a=ccap:1 PSTN E164 +15551234 + a=ccap:1 PSTN E164 +15551234 9 a=pcfg:1 a=pcfg:2 m=1 t=1 c=1 a=1,2,3 m=video 49174 RTP/AVP 34 a=mcap:2 - - a=ccap:2 PSTN E164 +15551234 + a=ccap:2 PSTN E164 +15551234 9 a=pcfg:3 a=pcfg:4 m=2 t=1 c=2 a=1,2,3 Figure 6: SDP offer with alternative media (1) Upon receiving the SDP offer descibed in Figure 6, Bob decided to select the circuit-switched bearer and generates the answer described in Figure 7 v=0 o=- 2890973824 2890987289 IN IP4 192.0.2.7 s= t=0 0 a=setup:active a=connection:new a=cs-correlation:uuie:2890W284hAT452612908awudfjang908 - m=audio - PSTN - + m=audio 9 PSTN - c= PSTN E164 +1551234 - m=video - PSTN - + m=video 9 PSTN - c=PSTN E164 +1551234 a=acfg:2 Figure 7: SDP answer with circuit-switched media (2) 7. IANA Considerations This document instructs IANA to register a number of SDP tokens according to the following data.