Filtering Location Notifications in the Session Initiation Protocol (SIP)
RFC 6447
Document | Type | RFC - Proposed Standard (January 2012; No errata) | |
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Authors | Brian Rosen , Hannes Tschofenig , Rohan Mahy | ||
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). |
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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 publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must 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 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 inShow full document text