Handover mechanisms in next generation heterogeneous wireless ...

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TRUST ASSISTED HANDOVER ALGORITHM FOR RELIABLE HANDOVER Figure 5.8 Handover delay vs. Trust density vs. Probability of no TA [THOA, ETS=10] Figure 5.9 Handover delay vs. Trust density vs. Probability of no TA [MHOA] 5.6.2 Impact of Effective TAH Scope In this analysis, the effect of adjusting the THOA ETS on handover delay and load balance factor is measured. In the simulation, three typical handover scenarios have been considered: low trust density (0.3), medium trust density (0.6) and high trust density (0.9). When the effective TAH scope ETS is increased in an attempt to make the load fairly distributed among the POAs (shown in Figure 5.11), the MH with the THOA enabled may experience an increase of handover delay in the medium and high trust - 104 -
TRUST ASSISTED HANDOVER ALGORITHM FOR RELIABLE HANDOVER density scenarios (demonstrated in Figure 5.10). However, in the low trust density scenarios, Figure 5.10 shows that the ETS has much limited impact on handover delay. The widening of the ETS in the THOA would result in a better load balance pattern among the access networks as demonstrated in Figure 5.11. But, the LBF tends to go into a stable state. Then, further increase of the ETS would deteriorate the performance. This phenomenon manifests itself on the performance of both handover delay and LBF. The simulation results give guidance on how the THOA can be tuned to meet the performance requirements in various handover scenarios. Figure 5.10 The effect of THOA ETS on handover delay - 105 -
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Handover Mechanisms in Next Generat
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ACKNOWLEDGMENT First of all, I woul
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TABLE OF CONTENTS 4.4.2 Power Save
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LIST OF FIGURES LIST OF FIGURES Fig
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LIST OF FIGURES Figure 7.2 A generi
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ABSTRACT New access technologies su
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Chapter 1 INTRODUCTION New access t
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INTRODUCTION becomes available. Han
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INTRODUCTION The above multipliciti
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INTRODUCTION network trust pattern
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INTRODUCTION 1.3 Related Publicatio
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INTRODUCTION TECHNICAL REPORTS XIII
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HANDOVER MANAGEMENT horizontally. H
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HANDOVER MANAGEMENT The objective o
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HANDOVER MANAGEMENT air interface,
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HANDOVER MANAGEMENT proposed archit
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HANDOVER MANAGEMENT Access point (A
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HANDOVER MANAGEMENT users. Moreover
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HANDOVER MANAGEMENT For IEEE 802.11
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HANDOVER MANAGEMENT The two schemes
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HANDOVER MANAGEMENT When a MH is mo
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3.1 Introduction Chapter 3 HANDOVER
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SECURITY FOR HANDOVER ACROSS HETERO
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Page 65 and 66: SECURITY FOR HANDOVER ACROSS HETERO
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Page 69 and 70: DYNAMIC NEIGHBOUR TRUST INFORMATION
Page 93 and 94: Chapter 5 TRUST ASSISTED HANDOVER A
Page 95 and 96: TRUST ASSISTED HANDOVER ALGORITHM F
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Page 123 and 124: Chapter 6 PROXY BASED AUTHENTICATIO
Page 125 and 126: PROXY BASED AUTHENTICATION LOCALISA
Page 147 and 148: MULTI-INTERFACE MOBILE MODEL FOR ME
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MULTI-INTERFACE MOBILE MODEL FOR ME
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CONCLUSIONS AND FUTURE RESEARCH WOR
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ABBREVIATIONS 3G 3rd Generation Wir
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ABBREVIATIONS LS Location Server MH
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ABBREVIATIONS THOA Trust Assisted H
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REFERENCES [12] C. Politis, T. Oda,
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REFERENCES [37] Wi-Fi Alliance, "Wi
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REFERENCES presented at IEEE Intern
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REFERENCES [90] R. Verdone and A. Z
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REFERENCES [116] K. E. Malki and H.
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