GEOPRIV Layer 7 Location Configuration Protocol: Problem Statement and Requirements
RFC 5687

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Internet Engineering Task Force (IETF)                     H. Tschofenig
Request for Comments: 5687                        Nokia Siemens Networks
Category: Informational                                   H. Schulzrinne
ISSN: 2070-1721                                      Columbia University
                                                              March 2010

            GEOPRIV Layer 7 Location Configuration Protocol:
                   Problem Statement and Requirements

Abstract

   This document provides a problem statement, lists requirements, and
   captures design aspects for a GEOPRIV Layer 7 (L7) Location
   Configuration Protocol (LCP).  This protocol aims to allow an end
   host to obtain location information, by value or by reference, from a
   Location Information Server (LIS) that is located in the access
   network.  The obtained location information can then be used for a
   variety of different protocols and purposes.  For example, it can be
   used as input to the Location-to-Service Translation (LoST) Protocol
   or to convey location within the Session Initiation Protocol (SIP) to
   other entities.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   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
   http://www.rfc-editor.org/info/rfc5687.

Tschofenig & Schulzrinne      Informational                     [Page 1]
RFC 5687            GEOPRIV L7 LCP: Problem Statement         March 2010

Copyright Notice

   Copyright (c) 2010 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
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   described in the Simplified BSD License.

Table of Contents

   1. Introduction ....................................................3
   2. Terminology .....................................................3
   3. Scenarios .......................................................4
      3.1. Fixed-Wired Environment ....................................4
      3.2. Mobile Network .............................................7
      3.3. Wireless Access ............................................8
   4. Discovery of the Location Information Server ....................9
   5. Identifier for Location Determination ..........................11
   6. Requirements ...................................................14
   7. Security Considerations ........................................16
   8. Contributors ...................................................17
   9. Acknowledgements ...............................................18
   10. References ....................................................18
      10.1. Normative References .....................................18
      10.2. Informative References ...................................18

Tschofenig & Schulzrinne      Informational                     [Page 2]
RFC 5687            GEOPRIV L7 LCP: Problem Statement         March 2010

1.  Introduction

   This document provides a problem statement, lists requirements, and
   captures design aspects for a GEOPRIV Layer 7 (L7) Location
   Configuration Protocol (LCP).  The protocol has two purposes:

   o  It is used by a device to obtain its own location (referred as
      "Location by Value" or LbyV) from a dedicated node, called the
      Location Information Server (LIS).

   o  It enables the device to obtain a reference to location
      information (referred as "Location by Reference" or LbyR).  This
      reference can take the form of a subscription URI, such as a SIP
      presence-based Uniform Resource Identifier (URI), an HTTP/HTTPS
      URI, or another URI.  The requirements related to the task of
      obtaining an LbyR are described in a separate document, see
      [LBYR-REQS].

   The need for these two functions can be derived from the scenarios
   presented in Section 3.

   For this document, we assume that the GEOPRIV Layer 7 LCP runs
   between the device and the LIS.