Localized Mobility Management

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Localized Mobility Management Fast Mobile IP
Handoffs in heterogeneous networks
ITG Fachgruppe 5.2.4 IP and Mobility

• NEC Mobile Internet Group
• H. Hartenstein, B. Lamparter, M. Liebsch, K.
  Paul,
• X. Pérez, A. Sarma, R. Schmitz, D. Westhoff
• mobicom _at_ CCRLE.NEC.DE
• NEC Network Laboratories, Heidelberg
• June 2001

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Mobile IPBackground Overview

• Background
• Wireless access to the Internet is becoming
  commonplace
• Users 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

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Network Architecture- IST Project Moby Dick -
Mobility ServerAAALocalPolicy Server
Intra-domain hand-off
Home AgentAAAHomeQoS Server
Inter-technology hand-off
Inter-domain hand-off
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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
  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)

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Hierarchical Approaches / LMMe.g., Regional
Registration
HA
CN
Reg. COA
GMA
Administrative domain
Administrative domain
Router
HA Home Agent CN Correspondent Node GMA Gateway
Mobility Agent MAR Mobile Aware Router Reg.
COA Regional Care-of address
Local COA
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Non-hierarchical ApproachesFast Handoffs in
MIPv6-Draft
HA
CN
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.
Router
Bicasting
Handoff
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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.

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Thank you!Questions?