Handover mechanisms in next generation heterogeneous wireless ...

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MULTI-INTERFACE MOBILE MODEL FOR MEDIA INDEPENDENT HANDOVER Figure 7.13 ADI vs. Handover delay (with cross-layer trigger) Figure 7.14 ADI vs. Handover delay (without cross-layer trigger) - 152 -
MULTI-INTERFACE MOBILE MODEL FOR MEDIA INDEPENDENT HANDOVER The experiment moves further to transport layers. The TCP sequence number of the non real time traffic being carried from the CN to the MH is used for performance evaluation. The experimental results for cross-layer trigger and non cross-layer trigger are illustrated in Figure 7.15 and Figure 7.16 respectively. For the MH with the crosslayer trigger, the interruption of packet transmission during the handover at the radio overlap area is not obvious due to the short handover delay (around 40ms). But, the TCP transmission gap in the handover at the non-radio-overlap area is noticeable because of lack of radio coverage (illustrated as handover in the non-overlap area in Figure 7.15). The cross-layer trigger makes the TCP sequence curve fairly smooth. In contrast, the data transmission in non cross-layer trigger case has a longer breaking time, as demonstrated in Figure 7.16. The larger ADI can result in an excessive transmission recovery time. It is found that TCP retransmission mechanism has contributed to a TCP transmission break in handover. It is observed that the transmission break of 50s is incurred in radio overlap areas when ADI = 4s. Figure 7.15 TCP sequence number (with cross-layer trigger) - 153 -
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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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DYNAMIC NEIGHBOUR TRUST INFORMATION
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Chapter 5 TRUST ASSISTED HANDOVER A
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TRUST ASSISTED HANDOVER ALGORITHM F
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Page 113 and 114: TRUST ASSISTED HANDOVER ALGORITHM F
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Page 181 and 182: REFERENCES [12] C. Politis, T. Oda,
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