Transcript ITG Kick Off meeting Fachgruppe IP and `Mobility`

ITG Fachgruppe 5.2.4
IP and Mobility
Localized Mobility Management &
Fast Mobile IP Handoffs
in 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
© NEC Europe Ltd., NDL-E Heidelberg, 2001
Mobile IP
Background & 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 access
Overview
• 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 Architecture
- IST Project Moby Dick Mobility Server
AAALocal
Policy Server
W-CDMA
Intra-domain
hand-off
Home Agent
AAAHome
QoS Server
W-CDMA
Domain B
W-CDMA
Inter-technology
hand-off
802.11
Backbone
Domain C
Inter-domain
hand-off
Domain A
802.11
Ethernet
Domain D
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Open Issues
for recent Mobile IPv6 scenario
• 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)
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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 intraadministrative-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 / LMM
e.g., Regional Registration
HA
CN
INET
Reg. COA
GMA
GMA
Administrative
Local COA
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Administrative
domain
Router
domain
Reg. COA
HA
CN
GMA
MAR
Reg. COA
Home Agent
Correspondent Node
Gateway Mobility Agent
Mobile Aware Router
Regional Care-of address
Non-hierarchical Approaches
‘Fast Handoffs in MIPv6’-Draft
HA
CN
INET
In case of a handoff,
Router
Bicasting
Handoff
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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.
Comparison & 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!
Questions?
© NEC Europe Ltd., NDL-E Heidelberg, 2001