Handover mechanisms in next generation heterogeneous wireless ...

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MULTI-INTERFACE MOBILE MODEL FOR MEDIA INDEPENDENT HANDOVER coordinates the operations. The upper layers (TCP/Applications) are not aware of events in lower layers. Periodically, the HOMgr retrieves metric information through the embedded probes at different layers. In this implementation, the HOMgr employs the signal power based handover decision algorithm [82]. It is assumed that the implemented mobile terminal skips channel scanning process in discovering new POAs, which has been studied in [111]. Authentication is not implemented for handover association. However, the multi-interface with a HOMgr provides sufficient extensibility of accommodating other types of network interface such as GPRS and UMTS. 7.5 Performance Analysis 7.5.1 Single-interface vs. Dual-interface Figure 7.4 illustrates the simulated scenario containing a Mobile Host (MH), Correspondent Node (CN), Home Agent (HA) and Foreign Agent (FA). The HA Access Router (AR) and FA AR are connected to a Wide Area Network (WAN). The CN is attached to the WAN through a fixed link of 5Mbps. The HA Access Point (AP) and FA AP are tuned to different radio channels. They provide partially overlapped radio coverage as shown in the MH’s received signal power (Figure 7.5). The MH starts from the HA, and moves towards the FA at a speed of 20m/s, and then goes back to the HA. The coverage of the HA and FA is a circle of radius 450m. TCP/IP is applied between network nodes. Constant Bit Rate (CBR) traffic with a rate of 672Kbps (equivalent to 210-byte packet is sent every 2.25ms) is carried between the CN and the MH. The simulation was run for mobile terminal with both dual-interface and singleinterface. - 144 -
MULTI-INTERFACE MOBILE MODEL FOR MEDIA INDEPENDENT HANDOVER Figure 7.4 Mobility scenario 1 Figure 7.5 Received signal power at the MH The dual-interface MH is compared with the single-interface MH in regards to their data throughput, end-to-end packet delay and handover delay. The data throughputs of the dual-interface and the single-interface mobile terminals are demonstrated in Figure 7.6 and Figure 7.7 respectively. Both types of mobile terminal show common data transmission characteristics in non radio overlap areas. In the overlap areas, the dual- - 145 -
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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 105 and 106: TRUST ASSISTED HANDOVER ALGORITHM F
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Page 181 and 182: REFERENCES [12] C. Politis, T. Oda,
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