[IRTF-Announce] MOBOPTS RG Report

[Aaron Falk <falk at ISI.EDU>]

Mobility Optimizations Research Group Report
August 2006

Document Status:

  The RG has successfully completed its work on "Route Optimization
  Enhancements for Mobile IPv6". The RG document went through peer
  review and is currently in the RFC Editor's queue waiting to be
  published as an IRTF RFC.

  The document on "IP address Location Privacy Solutions" is making
  good progress, having gone through two iterations. This document is
  outlining solutions for protecting a device identity (and hence user
  identity) from being revealed as a result of mobility. This in
  practice means devising solutions for protecting the permanent
  device identity (such as a Mobile IP Home Address) from onlookers
  and judicious use of the topologically-consistent locator addresses
  with corresponding nodes.

  There is a new RG document on "L2 Abstractions for L3 Fast
  Handovers". This is the result of the effort on understanding and
  unifying the use of L2 primitives in effecting fast IP handovers
  using an Internet Car testbed being built at Keio University. The
  document is already fairly mature, and is expected to go through the
  review quickly.

  The problem statement draft on Network-Initiated Handovers is now
  being pursued in the IETF MIPSHOP WG. The problem statement draft
  for Multicast and Mobility needs more reviews.

Meetings:

  As with previous meetings, the RG met at Montreal. There is likely
  going to be an informal gathering of many RG members at the MobiArch
  Workshop in December.

RG topics:

  There were two topics which have generated interest lately:
  Transport performance during mobility and Policy implications on
  Mobility. The RG has already discussed a few interesting
  experimental studies on transport protocol performance, including
  TCP throughput during handovers in WLAN and performance of streaming
  during handovers between WLAN and CDMA EVDO networks. As we gain
  better understanding in these areas, there has also been interest in
  the interaction between Upper Layer Protocols and Mobile IP. One
  particular problem is connection persistence if the mobile IP home
  address changes, e.g., due to privacy reasons. The RG discussed the
  available alternatives during the Montreal meeting.

  The RG also discussed the implications of policy on mobility
  protocol design. The intent is first understand where the protocol
  design encounters limitations due to policy and investigate writing
  an informational document on the subject. During the process, a
  better policy architecture itself may evolve, but this is not the
  primary purpose on the exercise. There was considerable debate on
  the topic at the Montreal meeting. This is still at its early
  stages, and the discussion is expected to continue.

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