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A Seamless Handoff Approach of Mobile IP Protocol for Mobile Wireless Data Network.

A Seamless Handoff Approach of Mobile IP Protocol for Mobile Wireless Data Network. 資研一　黃明祥. Overview. Abstract Introduction Overview of Mobile IP A Seamless Handoff Approach Simulation and Results Conclusion. Abstract.

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A Seamless Handoff Approach of Mobile IP Protocol for Mobile Wireless Data Network.

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  1. A Seamless Handoff Approach of Mobile IP Protocol for Mobile Wireless Data Network. 資研一　黃明祥

  2. Overview • Abstract • Introduction • Overview of Mobile IP • A Seamless Handoff Approach • Simulation and Results • Conclusion

  3. Abstract • Today, mobile high-bandwidth data communications are becoming the next candidate of new targeting business. • In what kind of approach we could make the communication more comfortable and more correct？

  4. Introduction • Mobile IP technique is the most common solution for offering seamless roaming to mobile devices. • There are many problems associated with Mobile IP. Such as : Triangular routing, about tunneling management, etc.

  5. Triangular routing problem

  6. How to solve that problems? • Route optimization is proposed by using binding update. • In this paper, it proposes a seamless handoff mechanism to modify Mobile IP protocol.

  7. Approach • Propose an efficient handoff scheme in a routing table. (named Mobile Routing Table. MRT) • Propose a packet retransmission scheme to reduce the packet loss.

  8. Overview of Mobile IP • Main Components of MIP. • Basic Operations of MIP. • Problems in MIP.

  9. Main Components of MIP • Home Network：the network provide to which MN is registered. (the address is Home Address.) • Foreign Network：every other a MN can connect. • Care-of Address (CoA)IP that MN registers with its home agent.

  10. Main Components of MIP

  11. Basic Operation of MIP • Agent Advertisement messages. • Mobile Agent Discovery. • Registration. • Tunneling. • Binding Update. • Foreign Agent Smooth Handoffs.

  12. Problems in MIP • MIP has a triangular routing problem with a MN roaming from HA to FA. • It causes two problems：。Longer packet transmission time.。The handoff process results in packetloss.

  13. A Seamless Handoff Approach

  14. Difference • Standard Mobile IP：implement a binding cache. • Our Approach：construct an MRT in each mobile agent.(including HA, FA, and router)

  15. Mobile Routing Table (MRT)

  16. Example of MRT

  17. The State Transition

  18. MRT Registration/Update (1/2)

  19. MRT Registration/Update (2/2)

  20. The Proposed Handoff Scheme • Packet transmission CN→MN. • Packet transmission MN→CN. • Inter-network handoff.

  21. CN→MN (1/2)

  22. CN→MN (2/2)

  23. MN→CN

  24. MN Inter-Network Handoff

  25. Packet Retransmission Mechanism

  26. Comparison (1/2) • Δ1：From MN to HA or FA. • Δ2：From FA to MN. • Δ3：From HA to FA or from previous FA to new FA.

  27. Comparison (2/2) • T：Traffic between MN and CN. • N：The numbers of MNs that move from HA to FA.

  28. Simulation and Results (1/4)

  29. Simulations and Results (2/4)

  30. Simulations and Results (3/4)

  31. Simulations and Results (4/4)

  32. Conclusion • Based on MRT scheme, it can：。avoid the triangular routing problem.。a packet retransmission scheme to reduce packet loss during handoff.

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