Stefan Aust, Nikolaus Fikouras, Carmelita Görg ITG-Fachgruppe 5.2.4 Kamp-Lintfort, 20.6.01 Mobility Management in Integrated Network Platforms Stefan Aust,

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Presentation transcript:

Stefan Aust, Nikolaus Fikouras, Carmelita Görg ITG-Fachgruppe Kamp-Lintfort, Mobility Management in Integrated Network Platforms Stefan Aust, Nikolaus Fikouras and Carmelita Görg ComNets, University of Bremen, Germany

Stefan Aust, Nikolaus Fikouras, Carmelita Görg ITG-Fachgruppe Kamp-Lintfort, Contents  Problem Description  Integrated Networks  Proposed Solution  TCP over 2.5G/3G Networks  ComNets Testbed  Future Research

Stefan Aust, Nikolaus Fikouras, Carmelita Görg ITG-Fachgruppe Kamp-Lintfort, 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

Stefan Aust, Nikolaus Fikouras, Carmelita Görg ITG-Fachgruppe Kamp-Lintfort, Integrated Networks  Global Roaming  Integration of access networks Wireless and wire-lined  Option of ad hoc networks  Access Freedom  Integration of data and telecommunications  Personal Mobility (between devices)

Stefan Aust, Nikolaus Fikouras, Carmelita Görg ITG-Fachgruppe Kamp-Lintfort, 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

Stefan Aust, Nikolaus Fikouras, Carmelita Görg ITG-Fachgruppe Kamp-Lintfort, 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)

Stefan Aust, Nikolaus Fikouras, Carmelita Görg ITG-Fachgruppe Kamp-Lintfort, ComNets Testbed

Stefan Aust, Nikolaus Fikouras, Carmelita Görg ITG-Fachgruppe Kamp-Lintfort, Network Simulation with NS-2 Screenshot from the Network Animator (NAM)

Stefan Aust, Nikolaus Fikouras, Carmelita Görg ITG-Fachgruppe Kamp-Lintfort, 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

Stefan Aust, Nikolaus Fikouras, Carmelita Görg ITG-Fachgruppe Kamp-Lintfort, 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  N. A. Fikouras and C. Görg. Performance Comparison of Hinted and Advertisement Based Movement Detection Methods for Mobile IP Hand-offs. Communication Networks, 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 IST.  N. A. Fikouras, A. J. Könsgen, and C. Görg. Accelerating Mobile IP Hand-offs through Link- layer Information, An Experimental Investigation with b and Internet Audio. In Proceedings of the International Multiconference on Measurement, Modelling, and Evaluation of Computer-Communication Systems (MMB), Aachen, Germany, September 2001.