Network-based Localized Mobility Management BOF (netlmm)

Monday, August 1 at 0900-1000
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CHAIRS:  James Kempf <kempf@docomolabs-usa.com>
         Phil Roberts <Phil.Roberts@motorola.com>

DESCRIPTION:

Local mobility is IP mobility over a restricted geographical, administrative
and IP-topology domain. The Mobile IP community has for several years been
investigating protocols for optimizing localized mobility management.
These protocols are designed to reduce the amount of latency involved in
re-establishing the mobile node's IP packet delivery on a new access router
after handover, and to reduce the amount of signaling between the host and
the possibly topologically distant home agent after handover - while the
Mobile IP binding update and route optimzation is completing. The existing
protocols feature extensive host involvement in localized mobility management,
and a tight coupling with Mobile IP.

Two recent developments in the IETF and the marketplace suggest that a fresh
look at localized mobility management protocols is necessary:

1) Recently, several new protocols have emerged in the IETF for supporting
global mobility management. Although still experimental, the Host Identity
Protocol (HIP) has received much attention from researchers and others, and
has strong momenteum for a prototype deployment on the Internet. In addition,
while not traditionally considered a mobility management protocol, Mobike has
many features of a mobility management protocol, allowing a mobile node with
a VPN tunnel to remain connected during movement between IP links. Both of
these protocols could benefit by having support for localized mobility
management that is agnostic to the global mobility management protocol.

2) Wireless LAN switches are becoming the vehicle of choice for
deploying wireless LAN networks that are easy to manage and that support
seamless local IP mobility. Each wireless LAN switch vendor has their own
proprietary protocol - tightly coupled with the 802.11/802.3 link protocols -
that supports host mobility between IP subnets without requiring any
mobility management code on the host. As a result, these protocols allow
hosts to move across a restricted set of local subnets without changing their
IP address, but only for 802.11 media and only if the network is built with
the same vendor's switches. A standardized, interoperable protocol for
localized mobility management that is independent of the underlying wireless
and wired link media type would benefit interoperable deployments for
wireless LAN and other wireless media.

The common thread between these two developments is new alternatives for IP
mobility that could benefit from minimal host involvement in mobility
management so that the host does not have to change its IP address within
some restricted domain.

In this BOF, we'll discuss the problem and examine how a network-based
localized mobility management protocol could benefit a couple of different
wireless protocols, including the new cellular protocols 802.16 and Super 3G.
We'll then discuss chartering a working group to develop a network-based,
localized mobility management protocol.

Agenda:

Total Time: 1 1/2 hour

5 min. - Agenda discussion, co-chairs

10 min. - Problem statement, James Kempf, DoCoMo Labs USA
A brief description of the problem [1].

10 min. - Requirements and Gap Analysis, Gerardo Giaretta, Telcom Italia Lab
A discussion of some requirements and a comparison of existing
protocols and systems (FMIP + HMIP, dynamically assigned Mobile IP
HA, etc.) against the requirements to illustrate where there are
gaps [2].

10 min. - Localized Mobility Management for 3GPP All IP Networks (AIPN) with
New Access Technology, Katsutoshi Nisida,DoCoMo YRP
A discussion of 3GPP's All IP Network work, new, higher bandwidth
access technology and how 3GPP might benefit from network-based
localized mobility management for IP.

10 min. - Localized Mobility Management and 802.16, TBD
A discussion of the IEEE 802.16e access network and how it might
benefit from network-based localized mobility management for IP.

5 min. - Potential WG charter presentation, Phil Roberts

50 min. - Charter discussion, co-chairs and all

Reference:

[1] http://www.ietf.org/internet-drafts/draft-kempf-netlmm-nohost-ps-00.txt
[2] http://www.ietf.org/internet-drafts/draft-kempf-netlmm-nohost-req-00.txt