Requirements for an End-to-End Session Identification in IP-Based Multimedia Communication Networks
RFC 7206

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Internet Engineering Task Force (IETF)                          P. Jones
Request for Comments: 7206                                  G. Salgueiro
Category: Informational                                          J. Polk
ISSN: 2070-1721                                            Cisco Systems
                                                                L. Liess
                                                        Deutsche Telekom
                                                               H. Kaplan
                                                                  Oracle
                                                                May 2014

           Requirements for an End-to-End Session Identifier
             in IP-Based Multimedia Communication Networks

Abstract

   This document specifies the requirements for an end-to-end session
   identifier in IP-based multimedia communication networks.  This
   identifier would enable endpoints, intermediate devices, and
   management and monitoring systems to identify a session end-to-end
   across multiple SIP devices, hops, and administrative domains.

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/rfc7206.

Jones, et al.                 Informational                     [Page 1]
RFC 7206         Requirements for End-to-End Session ID         May 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. Conventions Used in This Document ...............................3
   3. Terminology .....................................................4
      3.1. What Does the Session Identifier Identify? .................4
      3.2. Communication Session ......................................5
      3.3. End-to-End .................................................6
   4. Session Identifier Use Cases ....................................6
      4.1. End-to-End Identification of a Communication Session .......6
      4.2. Protocol Interworking ......................................6
      4.3. Traffic Monitoring .........................................7
      4.4. Tracking Transferred Sessions ..............................7
      4.5. Session Signal Logging .....................................8
      4.6. Identifier Syntax ..........................................8
      4.7. 3PCC Use Case ..............................................9
   5. Requirements for the End-to-End Session Identifier ..............9
   6. Related Work in Other Standards Organizations ..................10
      6.1. Coordination with the ITU-T ...............................10
      6.2. Requirements within 3GPP ..................................11
   7. Security Considerations ........................................11
   8. Acknowledgments ................................................12
   9. Contributors ...................................................12
   10. References ....................................................12
      10.1. Normative References .....................................12
      10.2. Informative References ...................................12

Jones, et al.                 Informational                     [Page 2]
RFC 7206         Requirements for End-to-End Session ID         May 2014

1.  Introduction

   IP-based multimedia communication systems like SIP [1] and H.323 [2]
   have the concept of a "call identifier" that is globally unique.  The
   identifier is intended to represent an end-to-end communication
   session from the originating device to the terminating device.  Such
   an identifier is useful for troubleshooting, session tracking, and
   so forth.

   Unfortunately, there are a number of factors that mean that the