Diameter ITU-T Rw Policy Enforcement Interface Application
RFC 5431

Network Working Group                                             D. Sun
Request for Comments: 5431                                Alcatel-Lucent
Category: Informational                                       March 2009

       Diameter ITU-T Rw Policy Enforcement Interface Application

Status of This Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

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   document authors.  All rights reserved.

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Abstract

   This document describes the need for a new pair of IANA Diameter
   Command Codes to be used in a vendor-specific new application, namely
   for the ITU-T Rec. Q.3303.3 - Rw interface used to send a request/
   response for authorizing network Quality of Service (QoS) resources
   and policy enforcement in a network element, as one of the
   recommendations of the International Telecommunication Union -
   Telecommunication Standardization Sector (ITU-T).

Table of Contents

   1. Introduction ....................................................2
   2. Terminology .....................................................2
   3. Diameter ITU-T Rw Policy Enforcement Interface ..................3
   4. IANA Considerations .............................................3
      4.1. Application Identifier .....................................3
      4.2. Command Codes ..............................................4
      4.3. AVP Codes ..................................................4
   5. Security Considerations .........................................4
   6. Acknowledgements ................................................4
   7. References ......................................................5
      7.1. Normative References .......................................5
      7.2. Informative References .....................................5

Sun                          Informational                      [Page 1]
RFC 5431                   ITU-T Rw Interface                 March 2009

1.  Introduction

   This document summarizes the use of Diameter codes in a newly defined
   realization of a specification for authorizing network QoS resources
   and policy enforcement [Q.3303.3].  A new pair of Command Codes have
   been assigned by IANA.  This document summarizes the uses of newly
   defined Diameter codes (Command Codes, AVP, vendor-specific
   application id).  When combined with the Diameter Base protocol, this
   application's specification [Q.3303.3] satisfies the requirements of
   [Y.2111] of the International Telecommunication Union -
   Telecommunication Standardization Sector (ITU-T) to send a request
   and receive a response for controlling the policy enforcement.

   The Diameter realization of this application assumes the use of the
   Diameter Base protocol, as per RFC 3588, and extends it only for a
   specific application using a vendor-id (ITU-T), a vendor-specific
   application ID (16777256), a new Command Code (315), and new
   attribute-value pairs (AVPs), which are defined in the vendor-
   specific namespace.

   This application is used to authorize network QoS resources and
   policy enforcement (including the amount of bandwidth, QoS class, and
   traffic flow processing) as an extension of the Diameter application
   [RFC4006].  The request is based on the Diameter extensibility
   discussions in the DIME WG that led to the conclusion that it is
   better to define new Command Codes whenever the ABNF of a command is
   modified by adding, removing, or semantically changing a required AVP
   in order to avoid interoperability problems.  The document is
   utilizing authorization and accounting functionality, and the entire
   exchange is related to users utilizing applications that require QoS
   treatment.  This approach is consistent with the practice and
   experience gained since the publication of [RFC3588] (see for example
   [RFC5224]), which is now under revision by the DIME Working Group who
   will provide a revised set of recommendations and procedures for IANA
   considerations [DIME].

2.  Terminology

   In the base Diameter specification [RFC3588], Section 1.4 defines
   most of the terminology used in this document.  Additionally, the
   terms and acronyms defined in Section 3 and Section 4 of [Q.3303.3]
   are used in this document.

Sun                          Informational                      [Page 2]