Filtering Location Notifications in the Session Initiation Protocol (SIP)
RFC 6447
| Document | Type | RFC - Proposed Standard (January 2012; No errata) | |
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-mahy-geopriv-loc-filters | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | WG Document | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 6447 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Robert Sparks | ||
| IESG note |
LC end Mar 10 The Document Shepherd for this document is Richard Barnes (rbarnes@bbn.com). |
||
| Send notices to | (None) | ||
Internet Engineering Task Force (IETF) R. Mahy
Request for Comments: 6447 Individual
Category: Standards Track B. Rosen
ISSN: 2070-1721 NeuStar
H. Tschofenig
Nokia Siemens Networks
January 2012
Filtering Location Notifications in
the Session Initiation Protocol (SIP)
Abstract
This document describes filters that limit asynchronous location
notifications to compelling events. These filters are designed as an
extension to RFC 4661, an XML-based format for event notification
filtering, and based on RFC 3856, the SIP presence event package.
The resulting location information is conveyed in existing location
formats wrapped in the Presence Information Data Format Location
Object (PIDF-LO).
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6447.
Mahy, et al. Standards Track [Page 1]
RFC 6447 Location Filters January 2012
Copyright Notice
Copyright (c) 2012 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
(http://trustee.ietf.org/license-info) in effect on the date of
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the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Filter Definitions . . . . . . . . . . . . . . . . . . . . . . 4
3.1. Movement . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2. Speed Changes . . . . . . . . . . . . . . . . . . . . . . 5
3.3. Element Value Changes . . . . . . . . . . . . . . . . . . 5
3.4. Entering or Exiting a Region . . . . . . . . . . . . . . . 8
3.5. Location Type . . . . . . . . . . . . . . . . . . . . . . 10
3.6. Rate Control . . . . . . . . . . . . . . . . . . . . . . . 12
4. XML Schema . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5. Security Considerations . . . . . . . . . . . . . . . . . . . 15
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 16
6.1. URN Sub-Namespace Registration for
urn:ietf:params:xml:ns:location-filter . . . . . . . . . . 16
6.2. Schema Registration for location-filter . . . . . . . . . 16
7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 17
8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 17
9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 17
9.1. Normative References . . . . . . . . . . . . . . . . . . . 17
9.2. Informative References . . . . . . . . . . . . . . . . . . 18
Mahy, et al. Standards Track [Page 2]
RFC 6447 Location Filters January 2012
1. Introduction
Conveying location information encapsulated with a Presence
Information Data Format Location Object (PIDF-LO) [RFC4119] document
within SIP is described in [SIP-LOC]. An alternative signaling
approach to location conveyance, which uses asynchronous
communication, is available with the SIP event notification
mechanisms (see RFC 3265 [RFC3265]). This approach conveys location
information in PIDF-LO format using the presence event package
[RFC3856]. This document focuses on the event notification paradigm.
Determining when to send event notifications with location
information is technically more challenging than deciding when to
send other categories of notifications, since location may be
measured as a continuous gradient. Unlike notifications using
discrete-valued quantities, it is difficult to know when a change in
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