Location Conveyance for the Session Initiation Protocol
RFC 6442
Internet Engineering Task Force (IETF) J. Polk
Request for Comments: 6442 Cisco Systems
Category: Standards Track B. Rosen
ISSN: 2070-1721 J. Peterson
NeuStar
December 2011
Location Conveyance for the Session Initiation Protocol
Abstract
This document defines an extension to the Session Initiation Protocol
(SIP) to convey geographic location information from one SIP entity
to another SIP entity. The SIP extension covers end-to-end
conveyance as well as location-based routing, where SIP
intermediaries make routing decisions based upon the location of the
Location Target.
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/rfc6442.
Copyright Notice
Copyright (c) 2011 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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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.
Polk, et al. Standards Track [Page 1]
RFC 6442 Location Conveyance in SIP December 2011
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Table of Contents
1. Introduction ....................................................3
2. Conventions and Terminology Used in This Document ...............4
3. Overview of SIP Location Conveyance .............................4
3.1. Location Conveyed by Value .................................4
3.2. Location Conveyed as a Location URI ........................5
3.3. Location Conveyed though a SIP Intermediary ................6
3.4. SIP Intermediary Replacing Bad Location ....................7
4. SIP Extensions for Geolocation Conveyance .......................8
4.1. The Geolocation Header Field ...............................8
4.2. The Geolocation-Routing Header Field ......................11
4.2.1. Explaining Geolocation-Routing Header-Value
States .............................................12
4.3. 424 (Bad Location Information) Response Code ..............14
4.4. The Geolocation-Error Header Field ........................15
4.5. Location URIs in Message Bodies ...........................19
4.6. Location Profile Negotiation ..............................19
5. Geolocation Examples ...........................................20
5.1. Location-by-Value (in Coordinate Format) ..................20
5.2. Two Locations Composed in Same Location Object Example ....21
6. Geopriv Privacy Considerations .................................23
7. Security Considerations ........................................24
8. IANA Considerations ............................................26
8.1. IANA Registration for the SIP Geolocation Header Field ....26
8.2. IANA Registration for the SIP Geolocation-Routing
Header Field ..............................................26
8.3. IANA Registration for Location Profiles ...................27
8.4. IANA Registration for 424 Response Code ...................27
8.5. IANA Registration of New Geolocation-Error Header Field ...28
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