Registration Event Package Extension for Session Initiation Protocol (SIP) Globally Routable User Agent URIs (GRUUs)
RFC 5628
Network Working Group P. Kyzivat
Request for Comments: 5628 Cisco Systems, Inc.
Category: Standards Track October 2009
Registration Event Package Extension for
Session Initiation Protocol (SIP)
Globally Routable User Agent URIs (GRUUs)
Abstract
RFC 3680 defines a Session Initiation Protocol (SIP) event package
for registration state. This package allows a watcher to learn about
information stored by a SIP registrar, including its registered
contact.
However, the registered contact is frequently unreachable and thus
not useful for watchers. The Globally Routable User Agent URI
(GRUU), defined in RFC 5627, is a URI that is capable of reaching a
particular contact. However this URI is not included in the document
format defined in RFC 3680. This specification defines an extension
to the registration event package to include GRUUs assigned by the
registrar.
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
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described in the BSD License.
Kyzivat Standards Track [Page 1]
RFC 5628 Reg Event GRUU Extension October 2009
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Description . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Notifier Processing of SUBSCRIBE Requests . . . . . . . . . . 4
5. Notifier Generation of NOTIFY Requests . . . . . . . . . . . . 4
6. Subscriber Processing of NOTIFY Requests . . . . . . . . . . . 5
6.1. Managing Temporary GRUU Lifetime . . . . . . . . . . . . . 5
7. Sample reginfo Document . . . . . . . . . . . . . . . . . . . 7
8. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
8.1. Example: Welcome Notice . . . . . . . . . . . . . . . . . 8
8.2. Example: Implicit Registration . . . . . . . . . . . . . . 8
9. XML Schema Definition . . . . . . . . . . . . . . . . . . . . 11
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
10.1. URN Sub-Namespace Registration . . . . . . . . . . . . . . 12
10.2. XML Schema Registration . . . . . . . . . . . . . . . . . 13
11. Security Considerations . . . . . . . . . . . . . . . . . . . 13
12. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 14
13. References . . . . . . . . . . . . . . . . . . . . . . . . . . 14
13.1. Normative References . . . . . . . . . . . . . . . . . . . 14
13.2. Informative References . . . . . . . . . . . . . . . . . . 14
Kyzivat Standards Track [Page 2]
RFC 5628 Reg Event GRUU Extension October 2009
1. Introduction
RFC 3680 [2] defines a Session Initiation Protocol (SIP) [5] event
package for registration state. This package allows a watcher to
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