Network Mobility Support Goals and Requirements
RFC 4886
Network Working Group T. Ernst
Request for Comments: 4886 INRIA
Category: Informational July 2007
Network Mobility Support Goals and Requirements
Status of This Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The IETF Trust (2007).
Abstract
Network mobility arises when a router connecting a network to the
Internet dynamically changes its point of attachment to the Internet
thereby causing the reachability of the said network to be changed in
relation to the fixed Internet topology. Such a type of network is
referred to as a mobile network. With appropriate mechanisms,
sessions established between nodes in the mobile network and the
global Internet can be maintained after the mobile router changes its
point of attachment. This document outlines the goals expected from
network mobility support and defines the requirements that must be
met by the NEMO Basic Support solution.
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RFC 4886 NEMO Goals July 2007
Table of Contents
1. Introduction ....................................................2
2. NEMO Working Group Objectives and Methodology ...................3
3. NEMO Support Design Goals .......................................5
3.1. Migration Transparency .....................................5
3.2. Performance Transparency and Seamless Mobility .............5
3.3. Network Mobility Support Transparency ......................5
3.4. Operational Transparency ...................................5
3.5. Arbitrary Configurations ...................................5
3.6. Local Mobility and Global Mobility .........................6
3.7. Scalability ................................................7
3.8. Backward Compatibility .....................................7
3.9. Secure Signaling ...........................................7
3.10. Location Privacy ..........................................8
3.11. IPv4 and NAT Traversal ....................................8
3.12. Minimal Impact on Internet Routing ........................8
4. NEMO Basic Support One-Liner Requirements .......................8
5. Security Considerations ........................................10
6. Acknowledgments ................................................11
7. References .....................................................11
7.1. Normative References ......................................11
7.2. Informative References ....................................11
1. Introduction
Network mobility support (see [1] for the related terminology) is
concerned with managing the mobility of an entire network, viewed as
a single unit that changes its point of attachment to the Internet
and thus its reachability in the Internet topology. Such a network
is referred to as a mobile network and includes one or more mobile
routers (MRs), which connect it to the global Internet. Nodes behind
the MR(s) (MNNs) are both fixed (LFNs) and mobile (VMNs or LMNs). In
most cases, the internal structure of the mobile network will be
relatively stable (no dynamic change of the topology), but this is
not always true.
Cases of mobile networks include, for instance:
o Networks attached to people (Personal Area Networks or PANs): a
cell phone with one cellular interface and one Bluetooth interface
together with a Bluetooth-enabled PDA constitute a very simple
instance of a mobile network. The cell phone is the mobile router
while the PDA is used for web browsing or runs a personal web
server.
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RFC 4886 NEMO Goals July 2007
o Networks of sensors and computers deployed in vehicles: vehicles
are increasingly equipped with a number of processing units for
safety and ease of driving reasons, as advocated by ITS
(Intelligent Transportation Systems) applications ([4]).
o Access networks deployed in public transportation (buses, trains,
taxis, aircrafts): they provide Internet access to IP devices
carried by passengers (laptop, camera, mobile phone); host
mobility within network mobility or PANs; network mobility within
network mobility, i.e., nested mobility (see [1] for the
definition of nested mobility).
o Ad-hoc networks connected to the Internet via an MR: for instance,
students in a train who need to both set up an ad-hoc network
among themselves and get Internet connectivity through the MR
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