draft-ietf-mmusic-sdp-cs-02.txt   draft-ietf-mmusic-sdp-cs-03.txt 
MMUSIC WG M. Garcia-Martin MMUSIC WG M. Garcia-Martin
Internet-Draft Ericsson Internet-Draft Ericsson
Intended status: Standards Track S. Veikkolainen Intended status: Standards Track S. Veikkolainen
Expires: April 25, 2010 Nokia Expires: August 21, 2010 Nokia
October 22, 2009 February 17, 2010
Session Description Protocol (SDP) Extension For Setting Up Audio and Session Description Protocol (SDP) Extension For Setting Up Audio and
Video Media Streams Over Circuit-Switched Bearers In The Public Video Media Streams Over Circuit-Switched Bearers In The Public
Switched Telephone Network (PSTN) 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 Status of this Memo
This Internet-Draft is submitted to IETF in full conformance with the This Internet-Draft is submitted to IETF in full conformance with the
provisions of BCP 78 and BCP 79. provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet- other groups may also distribute working documents as Internet-
Drafts. Drafts.
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and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt. http://www.ietf.org/ietf/1id-abstracts.txt.
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html. 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 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. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents in effect on the date of Provisions Relating to IETF Documents
publication of this document (http://trustee.ietf.org/license-info). (http://trustee.ietf.org/license-info) in effect on the date of
Please review these documents carefully, as they describe your rights publication of this document. Please review these documents
and restrictions with respect to this document. carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
Abstract 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 This document may contain material from IETF Documents or IETF
for using the Session Description Protocol (SDP) Offer/Answer model Contributions published or made publicly available before November
for establishing audio and video media streams over circuit-switched 10, 2008. The person(s) controlling the copyright in some of this
bearers in the Public Switched Telephone Network (PSTN). 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 Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Conventions Used in This Document . . . . . . . . . . . . . . 5 2. Conventions Used in This Document . . . . . . . . . . . . . . 5
3. Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 5 3. Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. Overview of Operation . . . . . . . . . . . . . . . . . . . . 6 4. Overview of Operation . . . . . . . . . . . . . . . . . . . . 6
4.1. Example Call Flow . . . . . . . . . . . . . . . . . . . . 6 4.1. Example Call Flow . . . . . . . . . . . . . . . . . . . . 6
5. Protocol Description . . . . . . . . . . . . . . . . . . . . . 8 5. Protocol Description . . . . . . . . . . . . . . . . . . . . . 8
5.1. Level of Compliance . . . . . . . . . . . . . . . . . . . 8 5.1. Level of Compliance . . . . . . . . . . . . . . . . . . . 8
skipping to change at page 21, line 21 skipping to change at page 21, line 21
c=IN IP4 192.0.2.5 c=IN IP4 192.0.2.5
a=sescap:1 1,3 a=sescap:1 1,3
a=sescap:2 2,4 a=sescap:2 2,4
a=creq:med-v0,ccap-v0 a=creq:med-v0,ccap-v0
a=acap:1 cs-correlation:uuie:2890W284hAT452612908awudfjang908 a=acap:1 cs-correlation:uuie:2890W284hAT452612908awudfjang908
a=acap:2 setup:actpass a=acap:2 setup:actpass
a=acap:3 connection:new a=acap:3 connection:new
a=tcap:1 PSTN a=tcap:1 PSTN
m=audio 49170 RTP/AVP 0 8 3 m=audio 49170 RTP/AVP 0 8 3
a=mcap:1 - a=mcap:1 -
a=ccap:1 PSTN E164 +15551234 a=ccap:1 PSTN E164 +15551234 9
a=pcfg:1 a=pcfg:1
a=pcfg:2 m=1 t=1 c=1 a=1,2,3 a=pcfg:2 m=1 t=1 c=1 a=1,2,3
m=video 49174 RTP/AVP 34 m=video 49174 RTP/AVP 34
a=mcap:2 - a=mcap:2 -
a=ccap:2 PSTN E164 +15551234 a=ccap:2 PSTN E164 +15551234 9
a=pcfg:3 a=pcfg:3
a=pcfg:4 m=2 t=1 c=2 a=1,2,3 a=pcfg:4 m=2 t=1 c=2 a=1,2,3
Figure 6: SDP offer with alternative media (1) Figure 6: SDP offer with alternative media (1)
Upon receiving the SDP offer descibed in Figure 6, Bob decided to Upon receiving the SDP offer descibed in Figure 6, Bob decided to
select the circuit-switched bearer and generates the answer described select the circuit-switched bearer and generates the answer described
in Figure 7 in Figure 7
v=0 v=0
o=- 2890973824 2890987289 IN IP4 192.0.2.7 o=- 2890973824 2890987289 IN IP4 192.0.2.7
s= s=
t=0 0 t=0 0
a=setup:active a=setup:active
a=connection:new a=connection:new
a=cs-correlation:uuie:2890W284hAT452612908awudfjang908 a=cs-correlation:uuie:2890W284hAT452612908awudfjang908
m=audio - PSTN - m=audio 9 PSTN -
c= PSTN E164 +1551234 c= PSTN E164 +1551234
m=video - PSTN - m=video 9 PSTN -
c=PSTN E164 +1551234 c=PSTN E164 +1551234
a=acfg:2 a=acfg:2
Figure 7: SDP answer with circuit-switched media (2) Figure 7: SDP answer with circuit-switched media (2)
7. IANA Considerations 7. IANA Considerations
This document instructs IANA to register a number of SDP tokens This document instructs IANA to register a number of SDP tokens
according to the following data. according to the following data.
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10.2. Informative References 10.2. Informative References
[3GPP.24.008] [3GPP.24.008]
3GPP, "Mobile radio interface Layer 3 specification; Core 3GPP, "Mobile radio interface Layer 3 specification; Core
network protocols; Stage 3", 3GPP TS 24.008 3.20.0, network protocols; Stage 3", 3GPP TS 24.008 3.20.0,
December 2005. December 2005.
[I-D.garcia-mmusic-sdp-misc-cap] [I-D.garcia-mmusic-sdp-misc-cap]
Garcia, M., Veikkolainen, S., and R. Gilman, Garcia, M., Veikkolainen, S., and R. Gilman,
"Miscellaneous Capabilities Negotiation in the Session "Miscellaneous Capabilities Negotiation in the Session
Description Protocol (SDP)", Description Protocol (SDP)",
draft-garcia-mmusic-sdp-misc-cap-01 (work in progress), draft-garcia-mmusic-sdp-misc-cap-01 (work in progress),
July 2009. July 2009.
[I-D.ietf-mmusic-sdp-capability-negotiation] [I-D.ietf-mmusic-sdp-capability-negotiation]
Andreasen, F., "SDP Capability Negotiation", Andreasen, F., "SDP Capability Negotiation",
draft-ietf-mmusic-sdp-capability-negotiation-10 (work in draft-ietf-mmusic-sdp-capability-negotiation-10 (work in
progress), May 2009. progress), May 2009.
[I-D.ietf-mmusic-sdp-media-capabilities] [I-D.ietf-mmusic-sdp-media-capabilities]
Gilman, R., Even, R., and F. Andreasen, "SDP media Gilman, R., Even, R., and F. Andreasen, "SDP media
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