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A Novel Domain Re-organizing Algorithm for Network-Layer Mobility Management in 4G Networks

A Novel Domain Re-organizing Algorithm for Network-Layer Mobility Management in 4G Networks. Jianwen Huang, Ruijun Feng, Lei Liu, Mei Song, Junde Song Communications, Circuits and Systems, 2004. ICCCAS 2004 Date:2006/03/22 Reporter : Bor-Shyang Liang. Outline. Introduction

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A Novel Domain Re-organizing Algorithm for Network-Layer Mobility Management in 4G Networks

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  1. A Novel Domain Re-organizing Algorithm for Network-Layer Mobility Management in 4G Networks Jianwen Huang, Ruijun Feng, Lei Liu, Mei Song, Junde Song Communications, Circuits and Systems, 2004. ICCCAS 2004 Date:2006/03/22 Reporter : Bor-Shyang Liang

  2. Outline • Introduction • Hierarchical Mobile IPv6 Management • Motivation • Domain Re-organizing Algorithm • Simulation scenario and result analysis • Conclusion

  3. Introduction • Network-Layer Mobility Management (NMM) combines the mobile communication technology and IP technology to form an enhancedmobility management for next generation All-IP wireless/mobile Internet. • By extending Mobile IP protocol, the functions of hierarchical NMM is implemented.

  4. Hierarchical Mobile IPv6 Management (HMIPv6) • When high handoff frequently happens between two neighboring ARs, which are in the different domains respectively, it will cause a lot of inter-domain handoff signaling cost and delay.

  5. Motivation • How to adjust the network topology to against the fact that user mobility characteristics are always in changing?

  6. Domain Re-organizing Algorithm • Using real-time measurement to make different cells with highest handoff frequency into the same domain. • inter-domain handoff -> intra-domain handoff

  7. Domain Re-organizing Scheme • Whole Network • AN={a, b, c, d, e, f, g, …} • Pre-planned MAP domain set • MN={(a, b, g, f), (d, e, h, i), (c, e, j, k),…} ={M1, M2, M3, …} • The set of neighbor cells of special cell • N(a)={b, c, d, e, f, g} • Handoff times between cell i and cell j between t

  8. Domain Re-organizing Scheme (Cont.) • Tight neighbor cells • Assume |N(i)|=ni, cell j is not under the same MAP domain as cell i, HFi,j(t) > λ/ni (λ: weight factor) => j is one of the set Nt(i) • Nt(a)={e, d} • Benefit gained form the algorithm • λ1: intra-handoff cost factor λ2: inter-handoff cost factor (λ2 >= λ1) cell j is not under the same domain as cell i

  9. Domain Re-organizing Algorithm (Cont.) • Assume Nt(a) = {d,e} (HFa,d(t) > λ/6, HFa,e(t) > λ/6)

  10. Domain Re-organizing Scheme (Cont.)

  11. Simulation scenario • Simulation • Tool : NS2 • Area : 400m x 400m • 802.11b wireless AP : 7 • Radio transmission range : 100m • Cell overlap distance : 20m • Data Rate : 11Mb/s • Mobile Node :28 (MAP1<->MAP2:20) • MAP • MAP1={1, 3}, MAP2={2, 5}, MAP3={4, 6, 7} • Connected with ARs • Bandwidth = 10Mb/s, delay = 2ms • HA connected with network • Bandwidth =100Mb/s, delay = 16ms

  12. Signaling Cost v.s. Speed of MNs

  13. Comparison of handoff delay before and after reorganizing scheme

  14. Conclusion • A good algorithm can make inter-handoff change to inter-handoff so that the signaling cost and handoff delay can be reduced. • May frequent attachment process bring extra overhead to the network?

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