1. 1 Fast-integrated handover scheme with NEMO support in IEEE 802.16e BWA networks Lei ZHONG School of Electronics and Information Engineering, Tongji University, P.R. China Fuqiang LIU School of Electronics and Information Engineering, Tongji University, P.R. China Yusheng JI National Institute of Informatics (NII) and The Graduate University for Advanced Studies, Japan

2. 2 Outline Introduction Related work Proposed algorithm Analysis and results Conclusion

3. 3 Introduction -demand

4. 4 Introduction -NEMO scenario

5. 5 Outline Introduction Related work Proposed algorithm Analysis and results Conclusion

6. 6 Related work Mobile IPv6 Fast Handovers over IEEE 802.16e Networks (FH80216e) advantage To solve the problem of unacceptable latency for real-time services, FMIPv6 was proposed to performs part of the time-consuming process before actual mobile node handover, reducing handover latency. FH80216e describes how FMIPv6 could be implemented on link layers conforming to the 802.16e specification by introducing some cross- layer triggers. Shortcomings both the two layered handover mechanisms still operate alternately, not in parallel. mainly designed for the node mobility scenarios, suffers from bad performance when serving moving networks due to its extra encapsulation.

7. 7 Related work NEMO basic support protocol Advantage provides native NEMO handover. Shortcomings produces high handover latency due to have no consideration of link-layer handover.

8. 8 Related work NEMO basic support protocol Advantage provides native NEMO handover. Shortcomings produces high handover latency due to have no consideration of link-layer handover.

9. 9 Outline Introduction Related work Proposed algorithm Analysis and results Conclusion

10. 10 Proposed algorithm Network model The typical NEMO scenario is a vehicular network, with the vehicles moving mostly along roads, rails, or flight paths. In such a scenario, advance preparation for an impending handover works quite well.

11. 11 Proposed algorithm Handover operation

12. 12 Outline Introduction Related work Proposed algorithm Analysis and results Conclusion

13. 13 Analysis and results parameters: T frame : Frame duration of IEEE 802.16e OFDMA PHY. T BS_nego : Negotiation delay between the serving BS and the recommended BS in ms. T L2_entry : Latency of IEEE 802.16e network re-entry procedure. T hop : Delay of every routing hop in a wired backbone network. N nar_ha : Distance between the NAR and the HA in hops. N par_ha : Distance between the PAR and the HA in hops. N par_nar : Distance between the NAR and the HA in hops. T dad : Time needed to perform a DAD process. T cn_ha : Link delay between CN and HA.

14. 14 Analysis and results Expressions: Handover latency Service disruption time

15. 15 Analysis and results Handover latency for different frame durations Handover latency for different distances between MR and HA

16. 16 Analysis and results Disruption time for different frame durations Disruption time for different distances between MR and HA

17. 17 Outline Introduction Related work Proposed algorithm Analysis and results Conclusion

18. 18 Conclusion achieves a lower handover latency and service disruption time and, with a buffered router, supports even seamless handover in the network. Compatible and works well together with FH80216e, which supports node mobility.

19. 19 Thanks for your attention. Any question?