Handover mechanisms in next generation heterogeneous wireless ...

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LIST OF TABLES LIST OF TABLES Table 3.1 UMTS security algorithms [45] ...................................................................... 39 Table 5.1 An example of network trust coefficient table for network selection ............. 90 Table 5.2 Simulation parameters..................................................................................... 99 Table 6.1 A list of the PBAL trust association model related keys .............................. 119 - x -
ABSTRACT New access technologies such as IEEE 802.11 Wireless LAN are emerging as a new means of public wireless access. Working on public unlicensed bands, they are capable of providing high speed data services, but small radio coverage. The third generation cellular networks such as Universal Mobile Telecommunications System (UMTS) provide wide radio coverage, but have limited data rates. An integration of these heterogeneous wireless networks is expected to be an effective means of providing high speed data access in wide radio coverage in the Next Generation (NG) wireless networks. When a mobile user moves across these networks, it has to perform handover to maintain its services. During a handover, it is pivotal to guarantee both service continuity and service quality, which ensure that handover can be made seamlessly. To provide ubiquitous services, an extensive collaboration between network operators is anticipated to be an economic solution. Providing seamless handover and ubiquitous services in heterogeneous wireless networks presents many new research challenges. The objective of this thesis is to develop new handover management techniques for supporting seamless handover and facilitating ubiquitous services in heterogeneous wireless networks. More specifically, new techniques for dealing with the extensive collaboration of NG network operators, and new techniques that enable the interworking of heterogeneous wireless technologies. Regarding the extensive collaboration of network operators, a neighbour network trust information retrieval scheme is proposed for global roaming. With this scheme, an access network can obtain network trust information of its nearby access networks without relying on direct links with them. The retrieved trust information can be provided to an attached mobile user later to assist it with global roaming. Next, a handover decision algorithm that uses network trust information is presented. The proposed algorithm guarantees much more reliable handover in a multiple-operator - xi -
Page 1 and 2: Handover Mechanisms in Next Generat
Page 3 and 4: ACKNOWLEDGMENT First of all, I woul
Page 5 and 6: TABLE OF CONTENTS 4.4.2 Power Save
Page 7 and 8: LIST OF FIGURES LIST OF FIGURES Fig
Page 9: LIST OF FIGURES Figure 7.2 A generi
Page 13 and 14: Chapter 1 INTRODUCTION New access t
Page 15 and 16: INTRODUCTION becomes available. Han
Page 17 and 18: INTRODUCTION The above multipliciti
Page 19 and 20: INTRODUCTION network trust pattern
Page 21 and 22: INTRODUCTION 1.3 Related Publicatio
Page 23 and 24: INTRODUCTION TECHNICAL REPORTS XIII
Page 25 and 26: HANDOVER MANAGEMENT horizontally. H
Page 27 and 28: HANDOVER MANAGEMENT The objective o
Page 29 and 30: HANDOVER MANAGEMENT air interface,
Page 31 and 32: HANDOVER MANAGEMENT proposed archit
Page 33 and 34: HANDOVER MANAGEMENT Access point (A
Page 35 and 36: HANDOVER MANAGEMENT users. Moreover
Page 37 and 38: HANDOVER MANAGEMENT For IEEE 802.11
Page 39 and 40: HANDOVER MANAGEMENT The two schemes
Page 41 and 42: HANDOVER MANAGEMENT When a MH is mo
Page 43 and 44: 3.1 Introduction Chapter 3 HANDOVER
Page 45 and 46: SECURITY FOR HANDOVER ACROSS HETERO
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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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Chapter 6 PROXY BASED AUTHENTICATIO
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PROXY BASED AUTHENTICATION LOCALISA
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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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