NEtwork MObilityNEtwork MObility

By: Kristin BelangerBy: Kristin Belanger

ContentsContents

IntroductionIntroduction Mobile DevicesMobile Devices ObjectivesObjectives SecuritySecurity SolutionSolution OrganizationsOrganizations NEMO Basic SupportNEMO Basic Support Bi-directional TunnelsBi-directional Tunnels Problem SolvingProblem Solving Route OptimizationRoute Optimization

IntroductionIntroduction

Network Mobility – Network Mobility – ““when a router connecting a network to when a router connecting a network to

the Internet dynamically changes its the Internet dynamically changes its point of attachment to the Internet point of attachment to the Internet thereby causing the reachability of the thereby causing the reachability of the said network to be changed in relation said network to be changed in relation to the fixed Internet topology”to the fixed Internet topology”

When mobile device changes globallyWhen mobile device changes globally

Mobile DevicesMobile Devices

ExamplesExamples Personal Area NetworksPersonal Area Networks

PDA’sPDA’s Cell phonesCell phones SidekicksSidekicks OnStar*OnStar*

ObjectivesObjectives

Challenges facing IPv4 and IPv6Challenges facing IPv4 and IPv6 NEMO Basic SupportNEMO Basic Support Changes in protocolsChanges in protocols

SecuritySecurity RFC’sRFC’s

SecuritySecurity

AuthenticationAuthentication AuthorizationAuthorization ConfidentialityConfidentiality

SolutionSolution

Support groupSupport group Different levels of complexityDifferent levels of complexity InterfacesInterfaces

Rules and requirementsRules and requirements IP layerIP layer Traffic must pass through bi-directional tunnelTraffic must pass through bi-directional tunnel Must support mobile nodes, routers, hostsMust support mobile nodes, routers, hosts Preserve connections established through Preserve connections established through

interfaceinterface

OrganizationsOrganizations

MIPv6 Home NetworkMIPv6 Home Network NEMO Extended Home NetworkNEMO Extended Home Network NEMO Aggregated Home NetworkNEMO Aggregated Home Network Virtual Home NetworkVirtual Home Network NEMO Mobile Home NetworkNEMO Mobile Home Network

NEMO Basic SupportNEMO Basic Support

Continuous activityContinuous activity Solves problems with bi-directional Solves problems with bi-directional

tunneltunnel Connectivity to different hardwareConnectivity to different hardware Multi-homedMulti-homed Home agent – router on home networkHome agent – router on home network

Anchor point along with nodesAnchor point along with nodes Nested mobile networksNested mobile networks

Bi-directional TunnelsBi-directional Tunnels

Connection mobile router – home Connection mobile router – home agentagent SecureSecure Can create many problemsCan create many problems

Diverting trafficDiverting traffic New established tunnelNew established tunnel Split traffic with many tunnelsSplit traffic with many tunnels

Problem SolvingProblem Solving

Failure ToleranceFailure Tolerance Failure DetectionFailure Detection Path ExplorationPath Exploration Path SelectionPath Selection Re-homingRe-homing

Route OptimizationRoute Optimization

SPF problemSPF problem Data must go through home agentData must go through home agent Causes congestionCauses congestion

Bottleneck in home networkBottleneck in home network Increased delayIncreased delay Solution?Solution?

Direct pathDirect path Longer route = packet delayLonger route = packet delay Shorter route = increase load on networkShorter route = increase load on network

ConclusionConclusion

Very complex problemVery complex problem Constant changing informationConstant changing information

ProblemsProblems Will continue to growWill continue to grow

More problemsMore problems

Questions?Questions?