Network Working Group A. Johnston
Internet-Draft Avaya
Intended status: Standards Track J. Rafferty
Expires: October 11, 2013 Dialogic
April 9, 2013
A Mechanism for Transporting User to User Call Control Information in
SIP
draft-ietf-cuss-sip-uui-10
Abstract
There is a class of applications which benefit from using SIP to
exchange User to User Information (UUI) data during session
establishment. This information, known as call control UUI data, is
a small piece of data inserted by an application initiating the
session, and utilized by an application accepting the session. The
rules which apply for a specific application are defined by a UUI
package. This UUI data is opaque to SIP and its function is
unrelated to any basic SIP function. This document defines a new SIP
header field, User-to-User, to transport UUI data, along with an
extension mechanism.
Status of this Memo
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provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on October 11, 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
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Table of Contents
1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Requirements Discussion . . . . . . . . . . . . . . . . . . . 3
4. Normative Definition . . . . . . . . . . . . . . . . . . . . . 5
4.1. Syntax for UUI Header Field . . . . . . . . . . . . . . . 6
4.2. Hex Encoding Definition . . . . . . . . . . . . . . . . . 7
4.3. Source Identity of UUI data . . . . . . . . . . . . . . . 7
5. Guidelines for UUI Packages . . . . . . . . . . . . . . . . . 8
5.1. Extensibility . . . . . . . . . . . . . . . . . . . . . . 10
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
6.1. Registration of User-to-User Header Field . . . . . . . . 11
6.2. Registration of User-to-User Header Field Parameters . . . 11
6.3. Registration of UUI Packages . . . . . . . . . . . . . . . 11
6.4. Registration of UUI Content Parameters . . . . . . . . . . 12
6.5. Registration of UUI Encoding Parameters . . . . . . . . . 12
6.6. Registration of SIP Option Tag . . . . . . . . . . . . . . 12
7. Security Considerations . . . . . . . . . . . . . . . . . . . 13
8. Appendix - Other Possible Mechanisms . . . . . . . . . . . . . 13
8.1. Why INFO is Not Used . . . . . . . . . . . . . . . . . . . 13
8.2. Why Other Protocol Encapsulation UUI Mechanisms are
Not Used . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.3. MIME body Approach . . . . . . . . . . . . . . . . . . . . 14
8.4. URI Parameter . . . . . . . . . . . . . . . . . . . . . . 15
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 16
10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 16
10.1. Informative References . . . . . . . . . . . . . . . . . . 16
10.2. Normative References . . . . . . . . . . . . . . . . . . . 17
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 18
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