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Multiple Gateways Project

Multiple Gateways Project. E6951 2002 Spring Professor Campbell Group members: Adrija Biswas, Will Jenkins, Charalampos Mantelis, Naoya Seta, Nil Unerdem. Objectives. Modify the current Cellular IP implementation, so as to support multiple gateways

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Multiple Gateways Project

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  1. Multiple Gateways Project E6951 2002 Spring Professor Campbell Group members: Adrija Biswas, Will Jenkins, Charalampos Mantelis, Naoya Seta, Nil Unerdem

  2. Objectives Modify the current Cellular IP implementation, so as to support multiple gateways Verify the modified protocol using the ns simulator

  3. Approach CH GW1 GW2 RBS RBS BS3 BS1 BS2 BS4 MH

  4. NS-2 Simulator Periodiccall Random Load Generator UpdateLoad{} Global Write gw1_load gw2_load Main Module Call Gateway Switcher Read LoadCheckGW{} SwitchGW{} Call Switch-watchdog{} Periodiccall

  5. Main Module • Topology Setup • Initialization of Nodes • Link Setup • Traffic patterns setup • Initialization of Gateway Switcher and Random Number Generator modules

  6. Random Load Generator • Periodically generates random numbers for each gateway • Updates load variables

  7. Gateway Switcher • Periodically checks load value • Compares to threshold • Switches gateway

  8. Up-link NS-2 Simulator • Gateway • Set global load-variable • Random Number Generator (Exponential) • Base-Station • Load balancing • Check load-variable • Gateway switching • Mobile Host • Watchdog module

  9. Down-link NS-2 Simulator • Gateway • Handoff • Similar to hard handoff (potential packet loss) • Base-Station • Routing • Reverse path routing • Mobile Host

  10. Future Proposals • Load Balancing implemented through Gateway Beacons • Some sort of semi-soft handoff during gateway switch • Mesh topology (dynamic configuration) – with base stations broadcasting to one another.

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