Network Mobility (nemo)

In addition to this official charter maintained by the IETF Secretariat, there is additional information about this working group on the Web at:

       Additional NEMO Web Page

Last Modified: 2006-03-30

Additional information is available at tools.ietf.org/wg/nemo

Chair(s):

  • TJ Kniveton <tj@kniveton.com>

  • Thierry Ernst <thierry.ernst@inria.fr>

    Internet Area Director(s):

  • Jari Arkko <jari.arkko@piuha.net>
  • Mark Townsley <townsley@cisco.com>

    Internet Area Advisor:

  • Jari Arkko <jari.arkko@piuha.net>

    Technical Advisor(s):

  • Steven Bellovin <smb@cs.columbia.edu>

    Mailing Lists:

    General Discussion: nemo@ietf.org
    To Subscribe: nemo-request@ietf.org
    Archive: http://www.ietf.org/mail-archive/web/nemo/index.html

    Description of Working Group:

    The NEMO Working Group is concerned with managing the mobility of an
    entire network, which changes, as a unit, its point of attachment to
    the Internet and thus its reachability in the topology. The mobile
    network includes one or more mobile routers (MRs) which connect it to
    the global Internet.

    A mobile network is assumed to be a leaf network, i.e. it will not
    carry transit traffic. However,it could be multihomed, either with a
    single MR that has multiple attachments to the internet, or by using
    multiple MRs that attach the mobile network to the Internet.

    Initially,the WG will assume that none of the nodes behind the MR will
    be aware of the network's mobility, thus the network's movement needs
    to be completely transparent to the nodes inside the mobile
    network. This assumption will be made to accomodate nodes inside the
    network that are not generally aware of mobility.

    A basic approach for network mobility support is for each Mobile
    Router to have a Home Agent, and use bidirectional tunneling between
    the MR and HA to preserve session continuity while the MR moves. The
    MR will acquire a Care-of-address from its attachment point much like
    what is done for Mobile Nodes using Mobile IP. This approach allows
    nesting of mobile networks, since each MR will appear to its
    attachment point as a single node.

    The WG will take a stepwise approach by standardizing some basic
    support mechanisms based on the bidirectional tunneling approach, and
    at the same time study the possible approaches and issues with
    providing more optimal routing than can be had with (potentially
    nested) tunneling. However, the WG is not chartered to actually
    standardize a solution to such route optimization for mobile networks
    at this point in time.

    The WG will work on:

    - A threat analysis and security solution for the basic problem
    (tunneling between HA and MR)

    - A solution to the basic problem for both IPv4 and IPv6. The solution
    will allow all nodes in the mobile network to be reachable via
    permanent IP addresses, as well as maintain ongoing sessions as the MR
    changes its point of attachment within the topology. This will be done
    by maintaining a bidirectional tunnel between the MR and its Home
    Agent. The WG will investigate reusing the existing Mobile IPv6
    mechanisms for the tunnel management, or extend it if deemed
    necessary.

    - An informational document which specifies a detailed problem
    statement for route optimization and looks at various approaches to
    solving this problem. This document will look into the issues and
    tradeoffs involved in making the network's movement visible to some
    nodes, by optionally making them "NEMO aware". The interaction between
    route optimization and IP routing will also be described in this
    document. Furthermore, security considerations for the various
    approaches will also be considered.

    The WG will:

    - Ensure that solutions will scale and function for the different
    mobile network configurations, without requiring changes to
    Correspondent Nodes in the Internet. All solutions will aim at
    preserving route aggregation within the Internet and will satisfy an
    acceptable level of security (a thorough survey of new threats and an
    analysis of their severity will be conducted)

    - Ensure that various mechanisms defined within other IETF WGs will be
    useful for mobile networks. To achieve this, the NEMO WG will interact
    with other WGs when needed, and may place requirements on the
    protocols developed by those WGs.

    The WG will not:

    - consider routing issues inside the mobile network. Existing routing
    protocols (including MANET protocols) can be used to solve these
    problems.

    Goals and Milestones:

    Done  Submit terminology and requirements documents (for Basic support).
    Done  Submit NEMO Basic Support to IESG
    Done  Submit WG draft -00 on Threat Analysis and Security Requirements for NEMO.
    Done  Submit WG draft -00 on Multihoming Problem Statement
    Done  Submit WG draft -00 on NEMO Basic Support Usages
    Done  Submit WG draft -00 on Prefix Delegation for NEMO
    Done  Submit WG draft -00 on MIB for NEMO Basic Support
    Aug 2005  Submit Terminology as Informational to IESG
    Aug 2005  Submit Goals and Requirements as Informational to IESG
    Aug 2005  Submit WG draft -00 on Analysis of the Solution Space for Route Optimization
    Nov 2005  Shut down or recharter the WG to solve route optimization

    Internet-Drafts:

    Network Mobility Support Goals and Requirements (30151 bytes)
    Network Mobility Support Terminology (40773 bytes)
    NEMO Home Network models (44654 bytes)
    Analysis of Multihoming in Network Mobility Support (95276 bytes)
    NEMO Management Information Base (60805 bytes)
    Network Mobility Route Optimization Problem Statement (59968 bytes)
    DHCPv6 Prefix Delegation for NEMO (22379 bytes)
    Mobile Network Prefix Delegation (43413 bytes)
    Network Mobility Route Optimization Solution Space Analysis (99881 bytes)
    IPv4 Network Mobility (NEMO) Basic Support Protocol (39599 bytes)

    Request For Comments:

    Network Mobility (NEMO) Basic Support Protocol (RFC 3963) (75955 bytes)
    IETF Secretariat - Please send questions, comments, and/or suggestions to ietf-web@ietf.org.

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