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
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	Drafts.		Drafts.
	skipping to change at page 1, line 35		skipping to change at page 1, line 42
	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
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	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
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			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.
	skipping to change at page 24, line 25		skipping to change at page 24, line 25
	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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