NEtwork MObility By: Kristin Belanger

Contents Introduction Introduction Mobile Devices Mobile Devices Objectives Objectives Security Security Solution Solution Organizations Organizations NEMO Basic Support NEMO Basic Support Bi-directional Tunnels Bi-directional Tunnels Problem Solving Problem Solving Route Optimization Route Optimization

Introduction Network Mobility – Network Mobility – “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” “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” When mobile device changes globally When mobile device changes globally

Mobile Devices Examples Examples Personal Area Networks Personal Area Networks PDA’s PDA’s Cell phones Cell phones Sidekicks Sidekicks OnStar* OnStar*

Objectives Challenges facing IPv4 and IPv6 Challenges facing IPv4 and IPv6 NEMO Basic Support NEMO Basic Support Changes in protocols Changes in protocols Security Security RFC’s RFC’s

Security Authentication Authentication Authorization Authorization Confidentiality Confidentiality

Solution Support group Support group Different levels of complexity Different levels of complexity Interfaces Interfaces Rules and requirements Rules and requirements IP layer IP layer Traffic must pass through bi-directional tunnel Traffic must pass through bi-directional tunnel Must support mobile nodes, routers, hosts Must support mobile nodes, routers, hosts Preserve connections established through interface Preserve connections established through interface

Organizations MIPv6 Home Network MIPv6 Home Network NEMO Extended Home Network NEMO Extended Home Network NEMO Aggregated Home Network NEMO Aggregated Home Network Virtual Home Network Virtual Home Network NEMO Mobile Home Network NEMO Mobile Home Network

NEMO Basic Support Continuous activity Continuous activity Solves problems with bi-directional tunnel Solves problems with bi-directional tunnel Connectivity to different hardware Connectivity to different hardware Multi-homed Multi-homed Home agent – router on home network Home agent – router on home network Anchor point along with nodes Anchor point along with nodes Nested mobile networks Nested mobile networks

Bi-directional Tunnels Connection mobile router – home agent Connection mobile router – home agent Secure Secure Can create many problems Can create many problems Diverting traffic Diverting traffic New established tunnel New established tunnel Split traffic with many tunnels Split traffic with many tunnels

Problem Solving Failure Tolerance Failure Tolerance Failure Detection Failure Detection Path Exploration Path Exploration Path Selection Path Selection Re-homing Re-homing

Route Optimization SPF problem SPF problem Data must go through home agent Data must go through home agent Causes congestion Causes congestion Bottleneck in home network Bottleneck in home network Increased delay Increased delay Solution? Solution? Direct path Direct path Longer route = packet delay Longer route = packet delay Shorter route = increase load on network Shorter route = increase load on network

Conclusion Very complex problem Very complex problem Constant changing information Constant changing information Problems Problems Will continue to grow Will continue to grow More problems More problems

Questions?