Mobility Management in Integrated Network Platforms

1
Mobility Management in Integrated Network
Platforms

• Stefan Aust, Nikolaus Fikouras and Carmelita Görg
• ComNets, University of Bremen, Germany
• aust,niko,cg_at_comnets.uni-bremen.de

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Contents

• Problem Description
• Integrated Networks
• Proposed Solution
• TCP over 2.5G/3G Networks
• ComNets Testbed
• Future Research

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Problem Description

• Wide range of access networks
• Wide range of devices
• Different devices in every environment
• Separate devices for data and tele-communications
• Internet is not mobile enabled

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Integrated Networks

• Global Roaming
• Integration of access networks
• Wireless and wire-lined
• Option of ad hoc networks
• Access Freedom
• Integration of data and tele- communications
• Personal Mobility (between devices)

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Proposed Solution

• A solution should be based on the Internet
  Protocol
• Integrates hetero/homogeneous networks
• Bearer for data/telecommunications
• Global Roaming
• Mobile Internet Protocol
• Internet roaming
• Transparent to higher layers
• Does not interrupt communications
• Access Freedom
• Session Initiation Protocol
• Personal mobility
• Terminal-type negotiation
• Terminal capability negotiation
• Caller and callee authentication
• Multicast support

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TCP/IP over 2.5G/3G Networks

• Optimization Mechanisms for TCP over 2.5G/3G
  networks
• Large window size
• Large initial window
• MTU larger than default IP MTU (Maximum Transfer
  Unit)
• Path MTU discovery
• Selective acknowledgments (SACK)
• Explicit congestion notification (ECN)
• Comparison between TCP over 2.5G/3G networks and
  WAP Wireless Profiled TCP (WP-TCP)
• Selective acknowledgment (TCP-SHOULD, WAP-MUST)

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ComNets Testbed
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Network Simulation with NS-2
Screenshot from the Network Animator (NAM)
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Future Research

• Multi-interface end-devices
• Mobile IP provides mobility management for the
  total of communications
• End-devices should utilise multiple interfaces
  simultaneously
• Bandwidth Aggregation, QoS, Cost, Local Services,
  Distance to peer
• Mobile Aware Stacks
• Mobile IP is a transparent solution
• Other layers are not mobile aware
• Other layers provide resistances to mobility
• Improve performance through mobile awareness
• Ad hoc networks
• Heterogeneous, multi-hop, Internet compatible
• Investigate performance
• Personal Mobility, Security Requirements, Service
  Location

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Publications

• N. A. Fikouras and C. Görg. Performance
  Comparison of Hinted and Advertisement Based
  Movement Detection Methods for Mobile IP
  Hand-offs. In Proceedings of the European
  Wireless 2000, Dresden, Germany, September 2000.
  
• N. A. Fikouras and C. Görg. Performance
  Comparison of Hinted and Advertisement Based
  Movement Detection Methods for Mobile IP
  Hand-offs. Communication Networks, 2001. To
  Appear in Elsevier Science, Communication
  Networks.
• N. A. Fikouras, C. Görg, and I. Fikouras.
  Achieving Integrated Network Platforms through
  IP. In Proceedings of the Wireless World Research
  Forum Kick-Off Meeting 2001 (WWRF), Munich,
  Germany, March 2001. IST.
• N. A. Fikouras, A. J. Könsgen, and C. Görg.
  Accelerating Mobile IP Hand-offs through
  Link-layer Information, An Experimental
  Investigation with 802.11b and Internet Audio. In
  Proceedings of the International Multiconference
  on Measurement, Modelling, and Evaluation of
  Computer-Communication Systems (MMB), Aachen,
  Germany, September 2001.