draft-ietf-sipping-multiple-refer-03.txt   draft-ietf-sipping-multiple-refer-04.txt 
SIPPING Working Group G. Camarillo SIPPING Working Group G. Camarillo
Internet-Draft Ericsson Internet-Draft Ericsson
Expires: August 27, 2005 A. Niemi Expires: April 24, 2006 A. Niemi
M. Isomaki M. Isomaki
M. Garcia-Martin M. Garcia-Martin
Nokia Nokia
H. Khartabil H. Khartabil
Telio Telio
February 23, 2005 October 21, 2005
Refering to Multiple Resources in the Session Initiation Protocol (SIP) Refering to Multiple Resources in the Session Initiation Protocol (SIP)
draft-ietf-sipping-multiple-refer-03.txt draft-ietf-sipping-multiple-refer-04.txt
Status of this Memo Status of this Memo
By submitting this Internet-Draft, each author represents that any By submitting this Internet-Draft, each author represents that any
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
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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
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This Internet-Draft will expire on August 27, 2005. This Internet-Draft will expire on April 24, 2006.
Copyright Notice Copyright Notice
Copyright (C) The Internet Society (2005). Copyright (C) The Internet Society (2005).
Abstract Abstract
This document defines extensions to the SIP REFER method so that this This document defines extensions to the SIP REFER method so that this
method can be used to refer servers to multiple resources. These method can be used to refer servers to multiple resources. These
extensions include the use of pointers to Uniform Resource Identifier extensions include the use of pointers to Uniform Resource Identifier
(URI)-lists in the Refer-To header field and the "multiple-refer" SIP (URI)-lists in the Refer-To header field and the "multiple-refer" SIP
option-tag. option-tag.
Table of Contents Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Overview of operation . . . . . . . . . . . . . . . . . . . 3 3. Overview of operation . . . . . . . . . . . . . . . . . . . . 3
4. The multiple-refer SIP Option-Tag . . . . . . . . . . . . . 4 4. The multiple-refer SIP Option-Tag . . . . . . . . . . . . . . 4
5. Suppressing REFER's Implicit Subscription . . . . . . . . . 4 5. Suppressing REFER's Implicit Subscription . . . . . . . . . . 4
6. Behavior of SIP REFER-Issuers . . . . . . . . . . . . . . . 5 6. Behavior of SIP REFER-Issuers . . . . . . . . . . . . . . . . 5
7. Behavior of REFER-Recipients . . . . . . . . . . . . . . . . 5 7. Behavior of REFER-Recipients . . . . . . . . . . . . . . . . . 5
8. Default URI-List Format . . . . . . . . . . . . . . . . . . 5 8. Default URI-List Format . . . . . . . . . . . . . . . . . . . 5
9. Example . . . . . . . . . . . . . . . . . . . . . . . . . . 6 9. Example . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
10. Security Considerations . . . . . . . . . . . . . . . . . . 9 10. Security Considerations . . . . . . . . . . . . . . . . . . . 9
11. IANA Considerations . . . . . . . . . . . . . . . . . . . . 9 11. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
12. References . . . . . . . . . . . . . . . . . . . . . . . . . 9 12. References . . . . . . . . . . . . . . . . . . . . . . . . . . 9
12.1 Normative References . . . . . . . . . . . . . . . . . . 9 12.1. Normative References . . . . . . . . . . . . . . . . . . 9
12.2 Informational References . . . . . . . . . . . . . . . . 10 12.2. Informational References . . . . . . . . . . . . . . . . 10
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . 10 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 11
Intellectual Property and Copyright Statements . . . . . . . 12 Intellectual Property and Copyright Statements . . . . . . . . . . 12
1. Introduction 1. Introduction
The SIP [3] REFER method [5] allows a user agent to request a server The SIP [3] REFER method [5] allows a user agent to request a server
to send a request to a third party. Still, a number of applications to send a request to a third party. Still, a number of applications
need to request a server to initiate transactions towards a set of need to request a server to initiate transactions towards a set of
destinations. In one example, the moderator of a conference may want destinations. In one example, the moderator of a conference may want
the conference server to send BYE requests to a group of the conference server to send BYE requests to a group of
participants. In another example, the same moderator may want the participants. In another example, the same moderator may want the
conference server to INVITE a set of new participants. conference server to INVITE a set of new participants.
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This document defines a new SIP option-tag: "multiple-refer". This This document defines a new SIP option-tag: "multiple-refer". This
option-tag should be registered in the SIP Parameters registry. option-tag should be registered in the SIP Parameters registry.
SIP user agents that place the "multiple-refer" option-tag in a SIP user agents that place the "multiple-refer" option-tag in a
Supported header field understand REFER requests that contain Supported header field understand REFER requests that contain
resource list document describing multiple REFER-Targets. resource list document describing multiple REFER-Targets.
12. References 12. References
12.1 Normative References 12.1. Normative References
[1] Bradner, S., "Key words for use in RFCs to Indicate Requirement [1] Bradner, S., "Key words for use in RFCs to Indicate Requirement
Levels", BCP 14, RFC 2119, March 1997. Levels", BCP 14, RFC 2119, March 1997.
[2] Levinson, E., "Content-ID and Message-ID Uniform Resource [2] Levinson, E., "Content-ID and Message-ID Uniform Resource
Locators", RFC 2392, August 1998. Locators", RFC 2392, August 1998.
[3] Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston, A., [3] Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston, A.,
Peterson, J., Sparks, R., Handley, M., and E. Schooler, "SIP: Peterson, J., Sparks, R., Handley, M., and E. Schooler, "SIP:
Session Initiation Protocol", RFC 3261, June 2002. Session Initiation Protocol", RFC 3261, June 2002.
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[5] Sparks, R., "The Session Initiation Protocol (SIP) Refer [5] Sparks, R., "The Session Initiation Protocol (SIP) Refer
Method", RFC 3515, April 2003. Method", RFC 3515, April 2003.
[6] Rosenberg, J., "Extensible Markup Language (XML) Formats for [6] Rosenberg, J., "Extensible Markup Language (XML) Formats for
Representing Resource Lists", Representing Resource Lists",
draft-ietf-simple-xcap-list-usage-05 (work in progress), draft-ietf-simple-xcap-list-usage-05 (work in progress),
February 2005. February 2005.
[7] Levin, O., "Suppression of Session Initiation Protocol REFER [7] Levin, O., "Suppression of Session Initiation Protocol REFER
Method Implicit Subscription", Method Implicit Subscription",
draft-ietf-sip-refer-with-norefersub-01 (work in progress), draft-ietf-sip-refer-with-norefersub-03 (work in progress),
February 2005. October 2005.
[8] Camarillo, G. and A. Roach, "Requirements and Framework for [8] Camarillo, G. and A. Roach, "Requirements and Framework for
Session Initiation Protocol (SIP)Uniform Resource Identifier Session Initiation Protocol (SIP)Uniform Resource Identifier
(URI)-List Services", draft-ietf-sipping-uri-services-02 (work (URI)-List Services", draft-ietf-sipping-uri-services-03 (work
in progress), December 2004. in progress), April 2005.
12.2 Informational References 12.2. Informational References
[9] Rosenberg, J., "A Session Initiation Protocol (SIP) Event [9] Rosenberg, J., "A Session Initiation Protocol (SIP) Event
Package for Conference State", Package for Conference State",
draft-ietf-sipping-conference-package-10 (work in progress), draft-ietf-sipping-conference-package-12 (work in progress),
March 2005. July 2005.
[10] Johnston, A. and O. Levin, "Session Initiation Protocol Call [10] Johnston, A. and O. Levin, "Session Initiation Protocol Call
Control - Conferencing for User Agents", Control - Conferencing for User Agents",
draft-ietf-sipping-cc-conferencing-06 (work in progress), draft-ietf-sipping-cc-conferencing-07 (work in progress),
November 2004. June 2005.
Authors' Addresses Authors' Addresses
Gonzalo Camarillo Gonzalo Camarillo
Ericsson Ericsson
Hirsalantie 11 Hirsalantie 11
Jorvas 02420 Jorvas 02420
Finland Finland
Email: Gonzalo.Camarillo@ericsson.com Email: Gonzalo.Camarillo@ericsson.com
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