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Diameter Quality-of-Service Application
RFC 5866

Internet Engineering Task Force (IETF)                       D. Sun, Ed.
Request for Comments: 5866                                Alcatel-Lucent
Category: Standards Track                                      P. McCann
ISSN: 2070-1721                                            Motorola Labs
                                                           H. Tschofenig
                                                  Nokia Siemens Networks
                                                                 T. Tsou
                                                                  Huawei
                                                                A. Doria
                                          Lulea University of Technology
                                                            G. Zorn, Ed.
                                                             Network Zen
                                                                May 2010

                Diameter Quality-of-Service Application

Abstract

   This document describes the framework, messages, and procedures for
   the Diameter Quality-of-Service (QoS) application.  The Diameter QoS
   application allows network elements to interact with Diameter servers
   when allocating QoS resources in the network.  In particular, two
   modes of operation, namely "Pull" and "Push", are defined.

Status of This Memo

   This is an Internet Standards Track document.

   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).  Further information on
   Internet Standards is available in 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/rfc5866.

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
   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

Sun, et al.                  Standards Track                    [Page 1]
RFC 5866                Diameter QoS Application                May 2010

   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.  Framework  . . . . . . . . . . . . . . . . . . . . . . . . . .  5
     3.1.  Network Element Functional Model . . . . . . . . . . . . .  7
     3.2.  Implications of Endpoint QoS Capabilities  . . . . . . . .  8
       3.2.1.  Endpoint Categories  . . . . . . . . . . . . . . . . .  8
       3.2.2.  Interaction Modes between the Authorizing Entity
               and Network Element  . . . . . . . . . . . . . . . . .  9
     3.3.  Authorization Schemes  . . . . . . . . . . . . . . . . . . 10
       3.3.1.  Pull Mode Schemes  . . . . . . . . . . . . . . . . . . 10
       3.3.2.  Push Mode Schemes  . . . . . . . . . . . . . . . . . . 13
     3.4.  QoS Application Requirements . . . . . . . . . . . . . . . 14
   4.  QoS Application Session Establishment and Management . . . . . 17
     4.1.  Parties Involved . . . . . . . . . . . . . . . . . . . . . 17
     4.2.  Session Establishment  . . . . . . . . . . . . . . . . . . 18
       4.2.1.  Session Establishment for Pull Mode  . . . . . . . . . 18
       4.2.2.  Session Establishment for Push Mode  . . . . . . . . . 21
       4.2.3.  Discovery and Selection of Peer Diameter QoS
               Application Node . . . . . . . . . . . . . . . . . . . 24
     4.3.  Session Re-Authorization . . . . . . . . . . . . . . . . . 24
       4.3.1.  Client-Side Initiated Re-Authorization . . . . . . . . 25
       4.3.2.  Server-Side Initiated Re-Authorization . . . . . . . . 26
     4.4.  Session Termination  . . . . . . . . . . . . . . . . . . . 28
       4.4.1.  Client-Side Initiated Session Termination  . . . . . . 28
       4.4.2.  Server-Side Initiated Session Termination  . . . . . . 28
   5.  QoS Application Messages . . . . . . . . . . . . . . . . . . . 29
     5.1.  QoS-Authorization Request (QAR)  . . . . . . . . . . . . . 30
     5.2.  QoS-Authorization-Answer (QAA) . . . . . . . . . . . . . . 31

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