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Data-Only Emergency Calls
draft-ietf-ecrit-data-only-ea-07

Document type: Active Internet-Draft (ecrit WG)
Document stream: IETF
Last updated: 2014-02-14
Intended RFC status: Unknown
Other versions: plain text, xml, pdf, html

IETF State: WG Document
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: I-D Exists
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ECRIT                                                           B. Rosen
Internet-Draft                                             NeuStar, Inc.
Intended status: Standards Track                          H. Schulzrinne
Expires: August 18, 2014                                     Columbia U.
                                                           H. Tschofenig
                                                  Nokia Siemens Networks
                                                       February 14, 2014

                       Data-Only Emergency Calls
                  draft-ietf-ecrit-data-only-ea-07.txt

Abstract

   RFC 6443 'Framework for Emergency Calling Using Internet Multimedia'
   describes how devices use the Internet to place emergency calls and
   how Public Safety Answering Points (PSAPs) can handle Internet
   multimedia emergency calls natively.  The exchange of multimedia
   traffic typically involves a SIP session establishment starting with
   a SIP INVITE that negotiates various parameters for that session.

   In some cases, however, the transmission of application data is
   everything that is needed.  Examples of such environments include a
   temperature sensors issuing alerts, or vehicles sending crash data.
   Often these alerts are conveyed as one-shot data transmissions.
   These type of interactions are called 'data-only emergency calls'.
   This document describes a container for the data based on the Common
   Alerting Protocol (CAP) and its transmission using the SIP MESSAGE
   transaction.

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 18, 2014.

Rosen, et al.            Expires August 18, 2014                [Page 1]
Internet-Draft          Data-Only Emergency Calls          February 2014

Copyright Notice

   Copyright (c) 2014 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 . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Architectural Overview  . . . . . . . . . . . . . . . . . . .   4
   4.  Protocol Specification  . . . . . . . . . . . . . . . . . . .   6
     4.1.  CAP Transport . . . . . . . . . . . . . . . . . . . . . .   6
     4.2.  Profiling of the CAP Document Content . . . . . . . . . .   7
     4.3.  Sending a Data-Only Emergency Call  . . . . . . . . . . .   8
   5.  Error Handling  . . . . . . . . . . . . . . . . . . . . . . .   8
     5.1.  425 (Bad Alert Message) Response Code . . . . . . . . . .   9
     5.2.  The AlertMsg-Error Header Field . . . . . . . . . . . . .   9
   6.  Updates to the CAP Message  . . . . . . . . . . . . . . . . .  11
   7.  Call Backs  . . . . . . . . . . . . . . . . . . . . . . . . .  11
   8.  Handling Large Amounts of Data  . . . . . . . . . . . . . . .  11
   9.  Example . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  15
   11. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  17
     11.1.  Registration of the 'application/emergencyCall.cap+xml'
            MIME type  . . . . . . . . . . . . . . . . . . . . . . .  17
     11.2.  IANA Registration of Additional Data Block . . . . . . .  18
     11.3.  IANA Registration for 425 Response Code  . . . . . . . .  18
     11.4.  IANA Registration of New AlertMsg-Error Header Field . .  19
     11.5.  IANA Registration for the SIP AlertMsg-Error Codes . . .  19
   12. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  20
   13. References  . . . . . . . . . . . . . . . . . . . . . . . . .  20

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