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Versions: 00 01 02 RFC 5431

Diameter Maintenance and                                          D. Sun
Extensions (DIME)                                         Alcatel-Lucent
Internet-Draft                                             July 14, 2008
Intended status: Informational
Expires: January 15, 2009


       Diameter ITU-T Rw Policy Enforcement Interface Application
                     draft-sun-dime-itu-t-rw-01.txt

Status of this Memo

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Abstract

   This document describes the need for a new pair of IANA Diameter
   Command Codes and a new vendor-specific Application ID 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/responses for controlling the
   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 . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  4
   3.  Diameter ITU-T Rw Policy Enforcement Interface . . . . . . . .  5
   4.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  6
     4.1.  Application Identifier . . . . . . . . . . . . . . . . . .  6
     4.2.  Command Codes  . . . . . . . . . . . . . . . . . . . . . .  6
     4.3.  AVP Codes  . . . . . . . . . . . . . . . . . . . . . . . .  6
   5.  Security Considerations  . . . . . . . . . . . . . . . . . . .  7
   6.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . .  8
   7.  References . . . . . . . . . . . . . . . . . . . . . . . . . .  9
     7.1.  Normative References . . . . . . . . . . . . . . . . . . .  9
     7.2.  Informative References . . . . . . . . . . . . . . . . . .  9
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 10
   Intellectual Property and Copyright Statements . . . . . . . . . . 11
























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1.  Introduction

   This document summarizes the use of Diameter codes in a newly defined
   realization of a specification for controlling the policy
   enforcement.  A new pair of Command Codes and a new vendor-specific
   Application ID are requested to be assigned by IANA.  The 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
   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 (TBD), a new Command Code (TBD), and new AVPs defined
   in the vendor-specific namespace.
































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2.  Terminology

   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.













































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3.  Diameter ITU-T Rw Policy Enforcement Interface

   The Rw interface is used for information exchange to apply policy
   decisions between the Policy Decision Point (PDP) and the Policy
   Enforcement Point (PEP).

   It allows the PDP to push the admission decisions to the PEP.  It
   also allows the PEP to request the admission decisions from the PDP
   when path-coupled resource reservation mechanisms are in use.  The
   main information is conveyed by the Rw interface:

   o  Resources reservation and/or allocation request for media flows;
   o  QoS handling request such as packet marking and policing to use;
   o  Gate control (opening/closing) request for a media flow;
   o  NAPT and NAT traversal requesting the necessary address mapping
      information;
   o  Resource usage information request and report for media flows
   The detailed descriptions of the Diameter Policy Enforcement
   interface ITU-T Rw can be found in Section 5 of the [Q.3303.3].
































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4.  IANA Considerations

   This section provides guidance to the Internet Assigned Numbers
   Authority (IANA) regarding registration of values related to the
   Diameter protocol, in accordance with BCP 26 [RFC5226].

   This document defines values in the namespaces that have been created
   and defined in the [RFC3588].  The IANA Considerations section of
   that document details the assignment criteria.  Values assigned in
   this document, or by future IANA action, must be coordinated within
   this shared namespace.

4.1.  Application Identifier

   IANA is requested to allocate a vendor-specific application ID for
   the application [Q.3303.3] from the 16777216-4294967294 range.

   Registry:
   ID values            Name           Reference
   ----------------------------------------------
   to be assigned       ITU-T Rw       Section 7.2.1 of ITU-T Q.3303.3

4.2.  Command Codes

   IANA is requested to allocate command code values for the following
   commands defined in Section 7.4 of [Q.3303.3] from the Command Code
   namespace defined in [RFC3588].


Registry:
Code Value        Name                          Reference
-------------------------------------------------------------
to be assigned    Policy-Install-Request (PIR)  Section 7.4.1 of ITU-T Q.3303.3
to be assigned    Policy-Install-Answer  (PIA)  Section 7.4.2 of ITU-T Q.3303.3

4.3.  AVP Codes

   The values 1010~1018 are assigned by ITU-T to the following AVPs
   within the ITU-T vendor-ID 11502 namespace: PI-Request-Type AVP, PI-
   Request-Number AVP, Traffic-Descriptor-UL AVP, Traffic-Descriptor-DL
   AVP, Maximum-Burst-Size AVP, Committed-Data-Rate AVP, Committed-
   Burst-Size AVP, Excess-Burst-Size, Removal-Cause AVP.

   See Table 1/Q.3303.3 in Section 7.3.1 of [Q.3303.3] for the detailed
   information of AVP codes, value type and flag rules.






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5.  Security Considerations

   This document describes the Diameter Policy Enforcement Application.
   It builds on top of the Diameter Base protocol and the same security
   considerations described in [RFC3588] are applicable to this
   document.  No further extensions are required beyond the security
   mechanisms offered by [RFC3588].












































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6.  Acknowledgements

   The author would like to thank Dan Romascanu, Hannes Tschofenig and
   Tina Tsou for their help and support.  Finally, the author would like
   to thank Alcatel-Lucent, as most of the effort put into this document
   was done while he was in their employ.













































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7.  References

7.1.  Normative References

   [Q.3303.3]
              ITU-T Recommendation Q.3303.3, "Resource control protocol
              no. 3 (rcp3): Protocol at the Rw interface between the
              Policy Decision Physical Entity (PD-PE) and the Policy
              Enforcement Physical Entity (PE-PE): Diameter", 2008.

   [RFC3588]  Calhoun, P., Loughney, J., Guttman, E., Zorn, G., and J.
              Arkko, "Diameter Base Protocol", RFC 3588, September 2003.

7.2.  Informative References

   [RFC5226]  Narten, T. and H. Alvestrand, "Guidelines for Writing an
              IANA Considerations Section in RFCs", May 2008.

   [Y.2111]   ITU-T Recommedation Y.2111, "Resource and admission
              control functions in Next Generation Networks",
              September 2006.






























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Author's Address

   Dong Sun
   Alcatel-Lucent
   600 Mountain Ave
   Murray Hill, NJ  07974
   USA

   Phone: +1 908 582 2617
   Email: dongsun@alcatel-lucent.com









































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