Proxy Mobile IPv6 (PMIPv6) Multicast Handover Optimization by the Subscription Information Acquisition through the LMA (SIAL)
RFC 7161

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Internet Engineering Task Force (IETF)                     LM. Contreras
Request for Comments: 7161                                Telefonica I+D
Category: Experimental                                     CJ. Bernardos
ISSN: 2070-1721                                                  I. Soto
                                                                    UC3M
                                                              March 2014

       Proxy Mobile IPv6 (PMIPv6) Multicast Handover Optimization
   by the Subscription Information Acquisition through the LMA (SIAL)

Abstract

   This document specifies an experimental multicast handover
   optimization mechanism for Proxy Mobile IPv6 (PMIPv6) to accelerate
   the delivery of multicast traffic to mobile nodes after handovers.
   The mechanism, called Subscription Information Acquisition through
   the LMA (SIAL), is based on speeding up the acquisition of mobile
   nodes' multicast context by the mobile access gateways.  To do that,
   extensions to the current PMIPv6 protocol are proposed.  These
   extensions are not only applicable to the base solution for multicast
   support in Proxy Mobile IPv6, but they can also be applied to other
   solutions developed to avoid the tunnel convergence problem.
   Furthermore, these extensions are also independent of the role played
   by the mobile access gateway within the multicast network (acting as
   either multicast listener discovery proxy or multicast router).

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for examination, experimental implementation, and
   evaluation.

   This document defines an Experimental Protocol for the Internet
   community.  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/rfc7161.

Contreras, et al.             Experimental                      [Page 1]
RFC 7161         PMIPv6 Multicast Handover Optimization       March 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
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   publication of this document.  Please review these documents
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Handover Optimization
           Requirements  . . . . . . . . . . . . . . . . . . . . . .   5
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   6
   3.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   7
   4.  Proxy Mobile IPv6 Extensions  . . . . . . . . . . . . . . . .   8
     4.1.  Active Multicast Subscription Mobility Option . . . . . .   8
       4.1.1.  Option Application Rules  . . . . . . . . . . . . . .   8
       4.1.2.  Option Format . . . . . . . . . . . . . . . . . . . .   9
       4.1.3.  Backward Compatibility with MLDv1 . . . . . . . . . .   9
     4.2.  Multicast Signaling Flag on PBU/PBA Message Headers . . .  10
       4.2.1.  Flag Application Rules  . . . . . . . . . . . . . . .  10
         4.2.1.1.  Registration Process  . . . . . . . . . . . . . .  11
         4.2.1.2.  De-registration Process . . . . . . . . . . . . .  12
       4.2.2.  New Format of Conventional PBU/PBA Messages . . . . .  12
         4.2.2.1.  Proxy Binding Update Message  . . . . . . . . . .  12
         4.2.2.2.  Proxy Binding Acknowledgement Message . . . . . .  13
     4.3.  Messages for Active Multicast Subscription Query  . . . .  13
       4.3.1.  Subscription Query Message  . . . . . . . . . . . . .  13
         4.3.1.1.  Message Application Rules . . . . . . . . . . . .  13
         4.3.1.2.  Message Format  . . . . . . . . . . . . . . . . .  14
       4.3.2.  Subscription Response Message . . . . . . . . . . . .  15
         4.3.2.1.  Message Application Rules . . . . . . . . . . . .  15
         4.3.2.2.  Message Format  . . . . . . . . . . . . . . . . .  15
     4.4.  New PBA Timer in the LMA  . . . . . . . . . . . . . . . .  16
   5.  Handover Signaling Procedures . . . . . . . . . . . . . . . .  17