Location Source Parameter for the SIP Geolocation Header Field
draft-ietf-sipcore-locparam-03

Document Type Active Internet-Draft (sipcore WG)
Last updated 2019-09-16
Replaces draft-winterbottom-sipcore-locparam
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SIPCORE                                                  J. Winterbottom
Internet-Draft                               Winterb Consulting Services
Updates: RFC6442 (if approved)                                 R. Jesske
Intended status: Standards Track                        Deutsche Telekom
Expires: March 19, 2020                                       B. Chatras
                                                             Orange Labs
                                                               A. Hutton
                                                                    Atos
                                                      September 16, 2019

     Location Source Parameter for the SIP Geolocation Header Field
                   draft-ietf-sipcore-locparam-03.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.  This document defines the
   location-source parameter so that the entity adding the location
   value to Geolocation header field can identify itself using its
   hostname.

Status of This Memo

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

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   This Internet-Draft will expire on March 19, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Winterbottom, et al.     Expires March 19, 2020                 [Page 1]
Internet-Draft             Location Parameter             September 2019

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (https://trustee.ietf.org/license-info) in effect on the date of
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Rationale . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Example . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   6.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .   5
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
     8.1.  Registration of location-source parameter for Geolocation
           header field  . . . . . . . . . . . . . . . . . . . . . .   6
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   7
     10.2.  Informative References . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

Winterbottom, et al.     Expires March 19, 2020                 [Page 2]
Internet-Draft             Location Parameter             September 2019

1.  Introduction

   The SIP Geolocation specification [RFC6442] describes the
   "Geolocation" SIP header field which is used to indicate that the SIP
   message is conveying location information.  [RFC6442] specifies that
   SIP intermediaries should not add location values to a SIP request
   that already contains location value.  [RFC6442] also states that if
   a SIP intermediary adds location it is fully responsible for
   addressing the concerns of any 424 (Bad Location Information) SIP
   response it receives.  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
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