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Synchronizing Service Boundaries and Elements Based on the Location-to-Service Translation (LoST) Protocol (RFC6739) Disclosure Number: IPCOM000222843D
Original Publication Date: 2012-Oct-01
Included in the Prior Art Database: 2012-Nov-04
Document File: 50 page(s) / 52K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

H. Schulzrinne: AUTHOR [+1]


Since the early days of emergency services, there has been a desire to route emergency calls to Public Safety Answering Points (PSAPs) that are nearest to the location of the emergency caller. For this purpose each PSAP discloses one or more service boundaries so that this information can be used to select the appropriate PSAP and to route the call to it. RFC 5222 [RFC5222] defines this data structure in the following way:

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Internet Engineering Task Force (IETF)                    H. Schulzrinne Request for Comments: 6739                           Columbia University Category: Experimental                                     H. Tschofenig ISSN: 2070-1721                                   Nokia Siemens Networks                                                             October 2012

   Synchronizing Service Boundaries and <mapping> Elements Based on the             Location-to-Service Translation (LoST) Protocol


   The Location-to-Service Translation (LoST) protocol is an XML-based    protocol for mapping service identifiers and geodetic or civic    location information to service URIs and service boundaries.  In    particular, it can be used to determine the location-appropriate    Public Safety Answering Point (PSAP) for emergency services.

   The <mapping> element in the LoST protocol specification encapsulates    information about service boundaries and circumscribes the region    within which all locations map to the same service Uniform Resource    Identifier (URI) or set of URIs for a given service.

   This document defines an XML protocol to exchange these mappings    between two nodes.  This mechanism is designed for the exchange of    authoritative <mapping> elements between two entities.  Exchanging    cached <mapping> elements, i.e., non-authoritative elements, is    possible but not envisioned.  Even though the <mapping> element    format is reused from the LoST specification, the mechanism in this    document can be used without the LoST protocol.

Status of This Memo

   This document is not an Internet Standards Track specification; it is    published for examination, experimental implementation, and    evaluation.

   This document defines an Experimental Protocol for the Internet    community.  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).  Not    all documents approved by the IESG are a candidate for any level of    Internet Standard; see 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

Schulzrinne & Tschofenig      Experimental                      [Page 1]
 RFC 6739                        LoST Sync                   October 2012

 Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the    document authors.  All rights...