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Multimob Status Pages

Multicast Mobility (Concluded WG)
Int Area: √Čric Vyncke, Erik Kline | 2009-Sep-09 — 2014-Dec-01 

2013-07-23 charter

Multicast Mobility (multimob)


 Current Status: Active

     Stig Venaas <stig@venaas.com>
     Behcet Sarikaya <sarikaya@ieee.org>

 Internet Area Directors:
     Brian Haberman <brian@innovationslab.net>
     Ted Lemon <ted.lemon@nominum.com>

 Internet Area Advisor:
     Brian Haberman <brian@innovationslab.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/

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

     - 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

     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)

All charter page changes, including changes to draft-list, rfc-list and milestones:

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