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I-D ACTION:draft-jain-miplr-01.txt

A New Internet-Draft is available from the on-line Internet-Drafts directories.

	Title		: Mobile IP with Location Registers (MIP-LR)
	Author(s)	: R. Jain, J. Burns, M. Bereschinsky, C. Graff
	Filename	: draft-jain-miplr-01.txt
	Pages		: 24
	Date		: 24-Jul-01
This document is intended only to provide information to the Internet
community.  The Mobile IP (MIP) protocol for IP version 4 provides
continuous Internet connectivity to mobile hosts, without requiring any
changes to existing routers and higher-layer applications.  This
document describes an alternative protocol, Mobile IP with Location
Registers (MIP-LR), where the sender first queries a database, called a
Location Register, to obtain the recipients current location.  MIP-LR
is designed for operation in tactical military environments, enterprise
environments or within logical administrative domains, as it requires a
sending host to be aware which hosts implement the MIP-LR protocol.
MIP-LR gives up the transparency of MIP for several benefits in the
areas of survivability, performance and interoperability. 
MIP-LR improves survivability for situations where the mobile's home
network is particularly vulnerable (e.g. in the forward area of a
battlefield), by allowing location registers to be placed and
replicated outside the home network.  This document describes how
replicated location registers can be managed by Translation Server or
Quorum schemes.  In terms of performance, MIP-LR avoids triangle
routing and tunneling, and reduces the load on the home network as well
as the home agents.  MIP-LR provides improved interoperability with
protocols such as RSVP for providing QoS guarantees.  Finally, MIP-LR
is interoperable with MIP, such that hosts which implement only MIP can
continue to operate as expected (provided the provisions required by
MIP, such as Home and Foreign Agents, are appropriately provided)
without gaining any of the benefits of MIP-LR.  We have developed a
working version of the MIP-LR protocol running on Linux hosts.

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