Multicast Mobility (multimob)
-----------------------------

 Charter
 Last Modified: 2011-03-27

 Current Status: Active Working Group

 Chair(s):
     Stig Venaas  <stig@venaas.com>
     Behcet Sarikaya  <sarikaya@ieee.org>

 Internet Area Director(s):
     Ralph Droms  <rdroms.ietf@gmail.com>
     Jari Arkko  <jari.arkko@piuha.net>

 Internet Area Advisor:
     Jari Arkko  <jari.arkko@piuha.net>

 Mailing Lists: 
     General Discussion:multimob@ietf.org
     To Subscribe:      https://www.ietf.org/mailman/listinfo/multimob
     Archive:           http://www.ietf.org/mail-archive/web/multimob/current/maillist.html

Description of Working Group:

The Multicast mobility (multimob) working group provides guidance
 for supporting multicast in a mobile environment. The scope of work
 will be limited to Proxy Mobile IPv6, IGMPv3/MLDv2 protocols and
 listener mobility. The group will work on extensions of Proxy Mobile
 IPv6 to improve its capability to handle multicast efficiently. Work
 requiring modifications to IGMPv3/MLDv2 is out of scope in this
 stage of this working group, however, as are modifications to
 multicast routing protocols.

 Specific goals for the group are: 

 - A solution to the tunnel convergence problem by separating
   multicast routing from a mobility anchor. Possible techniques are
   using native infrastructure, using a dedicated mobility anchor
   etc.

 - Mechanisms to optimize multicast traffic during a handover. Such
   mechanisms may include context transfer functionality.

 - Mechanisms needed to support multicast source mobility. Both any
   source multicast and source specific multicast source mobility
   will be covered.

 - Document the configuration of IGMPv3/MLDv2 in mobile environments

 The group shall primarily focus on Proxy Mobile IPv6 (PMIPv6) based
 networks when looking at the first three items. It is possible but
 not required that the solutions are applicable also for Mobile IPv6
 (MIPv6) based networks.

 For background, the PMIPv6 specification as defined in RFC 5213 does
 not describe how to support multicast. Some forms of multicast
 support can, however, be built in the involved nodes by using
 existing capabilities of multicast protocols and the underlying
 mobility protocols. The working group has already documented how
 existing mechanisms can be used to support multicast, without
 requiring any additions or changes to message types and parameters
 specified in RFC 5213, and assuming an unmodified mobile host. The
 current goals of the working group relate to improving the
 efficiency of this base solution.

 IGMPv3/MLDv2 has been specified for wired networks with shared links.
 Mobile nodes have needs that are specific to wireless networks and
 mobility (e.g. entering a dormant mode to conserve battery power,
 minimizing the latency for joining and leaving a group in support of
 movement).

 In performing its work, the working group will work closely with
 both the mobility community (NETEXT WG) and the multicast community
 (MBONED WG). The group will consider both source specific multicast
 and any source multicast multicast models.

 Future work, subject to rechartering, may study/evaluate extensions
 to IGMPv3/MLDv2 to support better operation in mobile environments.

 Goals and Milestones:

   Nov 2010       Initial version of a document on how to tune IGMPv3/MLDv2 for 
                mobility 

   Apr 2011       Submit a document on how to tune IGMPv3/MLDv2 for mobility, for 
                publication as either Informational or Best Current Practice 

   Jun 2011       Initial version of document on PMIPv6 routing optimizations to 
                avoid tunnel convergence problem 

   Nov 2011       Initial version of document on PMIPv6 multicast source mobility 
                solution 

   Nov 2011       Initial version of document on PMIPv6 handover optimizations 

   Jun 2012       Submit PMIPv6 routing optimizations document to IESG for 
                publication as Internet Standard 

   Nov 2012       Submit PMIPv6 handover optimizations document to IESG for 
                publication as Internet Standard 

   Nov 2012       Submit PMIPv6 multicast source mobility solution to IESG for 
                publication as Internet Standard 

   Dec 2012       Decision to include additional optimization work involving 
                extensions to IGMPv3 or MLDv2 

   Dec 2012       Recharter based on the above decisions (or close the group if 
                no new work is needed) 


 Internet-Drafts:

  No Current Internet-Drafts.

 Request For Comments:

  RFC   Stat Published     Title
------- -- ----------- ------------------------------------
RFC6224 I    Apr 2011    Base Deployment for Multicast Listener Support in Proxy 
                       Mobile IPv6 (PMIPv6) Domains