Location Source Parameter for the SIP Geolocation Header Field
draft-winterbottom-sipcore-locparam-00

• Status
• IESG evaluation record
• IESG writeups
• Email expansions
• History

• Versions
• 00
• 01
• 02
• 03

SIPCORE                                                  J. Winterbottom
Internet-Draft                               Winterb Consulting Services
Updates: RFC6442 (if approved)                                 R. Jesske
Intended status: Standards Track                        Deutsche Telekom
Expires: August 19, 2017                                      B. Chatras
                                                             Orange Labs
                                                               A. Hutton
                                                                   Unify
                                                       February 15, 2017

     Location Source Parameter for the SIP Geolocation Header Field
               draft-winterbottom-sipcore-locparam-00.txt

Abstract

   There are some circumstances where a geolocation header field may
   contain more than one location value.  Knowing the identity of the
   node adding the location value allows the recipient more freedom in
   selecting the value to look at first rather than relying solely on
   the order of the location values.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 19, 2017.

Copyright Notice

   Copyright (c) 2017 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

Winterbottom, et al.     Expires August 19, 2017                [Page 1]
Internet-Draft             Location Parameter              February 2017

   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 . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Rationale . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Example . . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   6.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .   5
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
     8.1.  Registration of loc-src Parameter for geolocation header
           field . . . . . . . . . . . . . . . . . . . . . . . . . .   6
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   6
     10.2.  Informative References . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

Winterbottom, et al.     Expires August 19, 2017                [Page 2]
Internet-Draft             Location Parameter              February 2017

1.  Introduction

   The SIP geolocation specification [RFC6442] describes a SIP header
   field that is used to indicate that the SIP message is conveying
   location information.  The specification suggests that only one
   location value should be conveyed.  However, some communications
   architectures, such as 3GPP [TS23-167] and ETSI [M493], prefer to use
   information provided by edge-proxies or acquired through the use of
   core-network nodes, before using information provided solely by user
   equipment (UE).  These solutions don't preclude the use of UE
   provided location but require a means of being able to distinguish
   the identity of the node adding the location value to the SIP message
   from that provided by the UE.  [RFC6442] stipulates that the order of
   location values in the geolocation header field aligns with the order
   in which they were added to the header field.  Whilst this order
   provides guidance to the recipient as to which values were added to
   the message earlier in the communication chain, it does not provide