© NEC Europe Ltd., NDL-E Heidelberg, 2001

Localized Mobility Management Localized Mobility Management &&

FastFast Mobile IP Handoffs Mobile IP Handoffs in heterogeneous networksin heterogeneous networks

NEC Mobile Internet Group:H. Hartenstein, B. Lamparter, M. Liebsch, K. Paul,

X. Pérez, A. Sarma, R. Schmitz, D. Westhoff

mobicom @ CCRLE.NEC.DE

NEC Network Laboratories, Heidelberg

June 2001

ITG Fachgruppe 5.2.4ITG Fachgruppe 5.2.4IP and MobilityIP and Mobility

© NEC Europe Ltd., NDL-E Heidelberg, 2001

Mobile IPMobile IPBackground & OverviewBackground & Overview

Background• Wireless access to the Internet is becoming commonplace• User‘s interest is in a seamless connection for voice and data

(Internet) via heterogeneous access technologies• Current GSM/GPRS solutions do not support heterogeneous

wireleless/wireline accessOverview• Mobile IP represents a basic link-layer independent approach

towards ‚mobile Internet‘, based on the IP protocol• Desirable goal of Mobile IP is to provide uninterrupted services

for roaming users in heterogeneous access networks

© NEC Europe Ltd., NDL-E Heidelberg, 2001

Network ArchitectureNetwork Architecture- IST Project Moby Dick -- IST Project Moby Dick -

W-CDMA

W-CDMA

W-CDMA

802.11

802.11

Ethernet

Domain C

Domain D

Domain A

Domain B

Backbone

Inter-technology hand-off

Intra-domain hand-off

Inter-domain hand-off

Home AgentAAAHomeQoS Server

Mobility ServerAAALocal

Policy Server

© NEC Europe Ltd., NDL-E Heidelberg, 2001

Open Issues Open Issues for recent for recent Mobile IPv6 Mobile IPv6

scenarioscenario

• Uninterrupted services for moving mobile devices, i.e., micro-mobility extensions to Mobile IP

Fast Handoff• Support a variety of access technologies• QoS• Paging• Security (AAA) and Privacy• (Header Compression)

© NEC Europe Ltd., NDL-E Heidelberg, 2001

NEC – MIP Handoff Activities NEC – MIP Handoff Activities

• Results– Prototype of a Mobile IPv4 fast handoff mechanism via ‘Simultaneous

Bindings’, including recent analysis for real-time UDP-traffic and TCP performance in case of a handoff

• Ongoing work– Analysis of Micro-Mobility extensions for Mobile IPv6 (recent IETF

Internet Drafts), to provide localized, fast handoff schemes for intra-administrative-domain handoffs

– Analysis of hierarchical vs. non-hierarchical approaches, e.g., by means of ns-simulations

• Future activities– Evaluation and implementation of the appropriate handoff mechanism

for recent environments and scenarios (e.g., IST project ‘Moby Dick’)

© NEC Europe Ltd., NDL-E Heidelberg, 2001

Hierarchical Approaches / LMMHierarchical Approaches / LMMe.g., Regional Registratione.g., Regional Registration

INET

HA CN

Administrative

domain

HA Home Agent

CN Correspondent NodeGMA Gateway Mobility AgentMAR Mobile Aware RouterReg. COA Regional Care-of address

GMAReg. COA

GMAReg. COA

Administrative

domain Router

Local COA

© NEC Europe Ltd., NDL-E Heidelberg, 2001

Non-hierarchical ApproachesNon-hierarchical Approaches‘Fast Handoffs in MIPv6’-Draft‘Fast Handoffs in MIPv6’-Draft

INET

HA CN

Router

Handoff

Bicasting

In case of a handoff,

packets destined for the Mobile Node are bicasted (duplicated) during the handoff phase;

i.e., when the MN handoffs, packets already arrive at the new point of attachment.

© NEC Europe Ltd., NDL-E Heidelberg, 2001

Comparison & EvaluationComparison & Evaluation

The approaches are to be analysed via ns-simulations, considering parameters, like:

• Handoff latency• End-to-end delay• Signalling load• Scalability• Route optimisation• Link delay / wireless delay• etc.

© NEC Europe Ltd., NDL-E Heidelberg, 2001

Thank you!Thank you!

Questions?Questions?