Mobility for IP: Performance, Signaling and Handoff Optimization (mipshop)
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Charter
Last Modified: 2008-04-18
Current Status: Active Working Group
Chair(s):
Stefano Faccin <
[email protected]>
Vijay Devarapalli <
[email protected]>
Internet Area Director(s):
Jari Arkko <
[email protected]>
Mark Townsley <
[email protected]>
Internet Area Advisor:
Jari Arkko <
[email protected]>
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Archive:
http://www.ietf.org/mail-archive/web/mipshop/index.html
Description of Working Group:
Mobile IPv6 specifies routing support to permit IP hosts using IPv6 to
move between IP subnetworks while maintaining session continuity.
Mobile IPv6 supports transparency above the IP layer, including
maintenance of active TCP connections and UDP port bindings.
To accomplish this, the mobile node notifies its home agent (and
potentially also its correspondent nodes) of the current binding
between its home address and its care of address. This binding allows
a
mobile node to maintain connectivity with the Internet as it moves
between subnets.
Depending on what steps a mobile node must perform on a new subnet, the
lag between when the mobile node has layer 2 connectivity and when it
begins sending and receiving packets on the new link may be
substantial. A mobile node must first detect at layer 3 that its point
of attachment has changed, then it must perform configuration on the
new link, including router discovery and configuring a new care of
address. After that, the mobile node must perform binding updates with
the home address and any correspondent nodes. Since many layer 2
mobility technologies require that the mobile node drop its link
connectivity to the old subnet when moving, any packets between the
correspondent node and the mobile node sent or in-flight during this
time arrive at the old care of address, where they are dropped. Such
packet loss may have significant adverse effects.
The Mobile IP Working group had previously been developing two
technologies to address the issues of signaling overhead and handoff
latency/packet loss:
- Hierarchical Mobile IPv6 mobility management (HMIPv6)
HMIPv6 deals with reducing the amount and latency of signaling
between a MN, its Home Agent and one or more correspondents by
introducing the Mobility Anchor Point (MAP) (a special node
located in the network visited by the mobile node). The MAP acts
somewhat like a local home agent for the visiting mobile node by
limiting the amount of signaling required outside the MAP's
domain.
- Fast Handovers for Mobile IPv6 (FMIPv6)
FMIPv6 reduces packet loss by providing fast IP connectivity as
soon as a new link is established. It does so by fixing up the
routing during link configuration and binding update, so that
packets delivered to the old care of address are forwarded to the
new. In addition, FMIPv6 provides support for preconfiguration of
link information (such as the subnet prefix) in the new subnet
while the mobile node is still attached to the old subnet. This
reduces the amount of preconfiguration time in the new subnet.
These two technologies can be used separately or together to reduce or
eliminate signaling overhead and packet loss due to handoff delays in
Mobile IPv6.
Scope of MIPSHOP:
The MIPSHOP Working Group will complete the FMIPv6 and HMIPv6 work
begun in the Mobile IP Working Group. Specifically, the WG will:
1) Complete the specification of HMIPv6 protocol.
2) Complete the specification of FMIPv6 protocol.
Because work (ongoing or originating) in other working groups may
suggest changes or alternative designs for HMIPv6 and FMIPv6, these
specifications will be advanced as Experimental RFCs until more
experience is obtained with IP mobility in IPv6.
3) Complete work on a set of requirements for "Localized Mobility
Management (LMM)", whereby a Mobile Node is able to continue
receiving packets in a new subnet before the corresponding changes
in either the Home Agent or Correspondent Node binding. It is the
intention that the requirements be consistent with the FMIPv6 and
HMIPv6 protocols; in the event that there are inconsistencies, they
will be documented.
4) Complete work on the applicability of FMIPv6 in the specific case
of 802.11 networks for advancement as Informational RFC.
There are security issues that arise because of the highly dynamic
nature of the security relationships between, say, a mobile node and
its mobility anchor points, or between a mobile node and its access
routers in a fast handover scenario. The working group is not required
to provide solutions to all these issues before publishing its
experimental and informational protocols. The working group will
document the security requirements and the shortcomings of the
solutions in the corresponding protocol specifications. This will
provide valuable feedback to other groups or subsequent efforts.
Goals and Milestones:
Done Working Group Last Call on draft-ietf-mipshop-hmip-xx.txt
Done Working Group Last Call on
draft-ietf-mipshop-lmm-requirements-XX.txt
Done Working Group Last Call on draft-ietf-mipshop-fmipv6-xx.txt
Done Discuss Last Call comments and security analyses at IETF 58
Done Submit draft draft-ietf-mipshop-lmm-requirements-XX.txt to IESG
for consideration of publication as Informational
Done Submit draft-ietf-mipshop-fmipv6-xx.txt to IESG for
consideration of publication as Experimental
Done Submit draft-ietf-mipshop-hmip-xx.txt to IESG for consideration
of publication as Experimental
Done Working Group Last Call on draft-ietf-mipshop-80211fh-xx.txt
for Informational
Done Submit draft-ietf-mipshop-80211fh-xx.txt to IESG for
consideration of publication as Informational
Done Working Group Last Call on draft-ietf-mipshop-cga-cba-XX.txt
Done Working Group Last Call on draft-ietf-mipshop-mis-ps
Done Submit draft-ietf-mipshop-cga-cba to IESG for publication as
Proposed Standard
Done Working Group Last Call on draft-ietf-mipshop-fmipv6-rfc4068bis
Done Working Group Last Call on draft-ietf-mipshop-handover-key-send
Done Submit draft-ietf-mipshop-mis-ps to IESG for publication as
Informational RFC
Done Working Group Last Call on draft-ietf-mipshop-rfc4041bis
Done Working Group Last Call on draft-ietf-mipshop-3gfh
Done Working Group Last Call on draft-ietf-mipshop-fh80216e
Done Submit draft-ietf-mipshop-fmipv6-rfc4068bis to IESG for
publication as Proposed Standard
Done Submit draft-ietf-mipshop-handover-key-send to IESG for
publication as Proposed Standard
Done Submit draft-ietf-mipshop-3gfh to IESG for publication as
Informational RFC
Dec 2007 Submit draft-ietf-mipshop-4140bis to IESG for publication as
Proposed Standard
Done Submit draft-ietf-mipshop-fh80216e to IESG for publication as
Informational RFC
Jan 2008 Working Group Last Call on draft-ietf-mipshop-mih-support
Feb 2008 Submit draft-ietf-mipshop-mih-support to IESG for publication
as Proposed Standard
Internet-Drafts:
Posted Revised I-D Title <Filename>
------ ------- --------------------------------------------
Apr 2006 Mar 2008 <draft-ietf-mipshop-fh80216e-07.txt>
Mobile IPv6 Fast Handovers over IEEE 802.16e Networks
May 2006 Apr 2008 <draft-ietf-mipshop-3gfh-07.txt>
Mobile IPv6 Fast Handovers for 3G CDMA Networks
May 2006 Apr 2008 <draft-ietf-mipshop-fmipv6-rfc4068bis-07.txt>
Mobile IPv6 Fast Handovers
Mar 2007 Oct 2007 <draft-ietf-mipshop-handover-key-03.txt>
Distributing a Symmetric FMIPv6 Handover Key using SEND
Mar 2007 Apr 2008 <draft-ietf-mipshop-4140bis-02.txt>
Hierarchical Mobile IPv6 Mobility Management (HMIPv6)
Dec 2007 Apr 2008 <draft-ietf-mipshop-mstp-solution-02.txt>
Mobility Services Framework Design
Request For Comments:
RFC Stat Published Title
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RFC4068 E Jul 2005 Fast Handovers for Mobile IPv6
RFC4140 E Aug 2005 Hierarchical Mobile IPv6 mobility management (HMIPv6)
RFC4260 I Jan 2006 Mobile IPv6 Fast Handovers for 802.11 Networks
RFC4866 PS May 2007 Enhanced Route Optimization for Mobile IPv6
RFC5164 I Mar 2008 Mobility Services Transport: Problem Statement
