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Mobility Management in Wireless Mesh Networks Utilizing Location Routing and Pointer Forwarding

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30 diapositives · 495 Views · Jul 26, 2014

Mobility Management in Wireless Mesh Networks Utilizing Location Routing and Pointer Forwarding. Bing Wang. Content . Background & Problem Formulation Wireless Mesh Network Mobility management Proposed Scheme: LMMesh Performance Model – SPN Model Parameterization Performance Analysis

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  1. Mobility Management in Wireless Mesh Networks Utilizing Location Routing and Pointer Forwarding Bing Wang

  2. Content • Background & Problem Formulation • Wireless Mesh Network • Mobility management • Proposed Scheme: LMMesh • Performance Model – SPN Model • Parameterization • Performance Analysis • Conclusion

  3. Wireless Mesh Network

  4. Mobility management • Search: find a mobile user’s current location • Update: update a mobile user’s location • Location information • Gateway: location database • Each MR: routing table • Handoff Management • Location Management • Routing-based • Pointer forwarding

  5. Routing-Based Method • Basic Idea • Mobility management is integrated with routing • Embed location information into regular packet • Good • No additional signaling cost using regular packet to do location update • Bad • Location information may be out-of-date for idle client

  6. Pointer Forwarding Method • K=2 Anchor MR

  7. LMMesh • Objective • Dynamically minimize network cost on a per-user basis • Methodology • Integration of both routing-based and pointer forwarding method. • Feature • Dynamically set the threshold K for the forwarding chain length

  8. Location Search for Internet Sessions

  9. Location Search for Intranet Sessions

  10. Performance Model • The SPN model for LMMesh

  11. Performance Model

  12. Performance Model

  13. Performance Model 6 7

  14. Performance Model 5

  15. Performance Analysis • Define service-to-mobility ratio (SMR) Average packet arrival rate Mobility rate

  16. Performance Analysis • Total communication cost incurred per time unit

  17. Total communication cost vs. K

  18. Optimal K value vs. SMR

  19. Total communication cost vs. ζ

  20. Average forwarding chain length vs. ζ

  21. Total communication cost vs. active ratio

  22. Optimal K value vs. active ratio

  23. Total communication cost vs. SMR

  24. Average forwarding chain length vs. SMR

  25. Total communication cost vs. ζ

  26. Average forwarding chain length vs. ζ Total communication cost v.s. ζ

  27. Total communication cost vs. active ratio

  28. Total communication cost vs. 1/λand1/μ

  29. Conclusion • LMMesh scheme combines routing-based method and pointer forwarding method to minimize overall communication cost of location management. • A SPN model is used to model the scheme and to perform evaluation. • Simulation results show the LMMesh scheme outperforms other location management schemes.

  30. Thank You