Handover mechanisms in next generation heterogeneous wireless ...

More documents

Recommendations

Info

TRUST ASSISTED HANDOVER ALGORITHM FOR RELIABLE HANDOVER 5.7 Conclusion Current known handover approaches such as the MHOA, which were designed for dealing with the network heterogeneities can not deal with the coexistence of multiple network operators. Other solutions such as network-controlled and mobile-controlled operator lists specified by IETF have been proposed to address this deficiency, but only as an add-on to network selection [72]. Unfortunately, they are unable to effectively support the changes of network trust relationship between networks. Current handover solutions have to rely on other mechanisms that appear as an add-on to support AAA in a handover rather than forming an integral part of their handover algorithms. The trust-assisted handover algorithm is presented to address this problem, since it is anticipated that it would become common as more and more independent operators are involved in interworking. The proposed THOA algorithm provides an efficient and flexible approach to deal with complex network trust relationship during a mobile’s handover decision making. At the mobile terminal, the network trust information about neighbours that is sent by the serving network is fed into the mobile’s handover decision algorithm. Either the mobile user or its home network operator can set handover policies to adjust the THOA ETS, and thus influence handover AAA delay. The simulation results showed that the THOA can provide a more reliable handover, and result in a 35% reduction in handover delay compared with the MHOA. By tuning the THOA ETS, it was shown that traffic can be evenly distributed among the POAs. It was shown that the implementation of the THOA would not compromise QoS, which is a very important consideration in deploying real wireless networks. - 110 -
Chapter 6 PROXY BASED AUTHENTICATION LOCALISATION 6.1 Introduction SCHEME FOR HANDOVER In Next Generation Networks, a number of heterogeneous and distributed wireless networks are expected to converge and have a common all-IP network architecture [6] These technologies could range from Wireless Local Area Network (WLAN) such as IEEE 802.11, to the third generation (3G) cellular networks such as Universal Mobile Telecommunications System (UMTS). These heterogeneous wireless networks are expected to co-exist as overlay networks and enable ubiquitous data services and provide very high data rates in strategic locations [4]. The interworking of different wireless systems and the demand for ubiquitous services present enormous challenges to network security [13, 52]. The trust model for wireless network is identified by three mutual trust relations between network entities [52]: two explicit trust relations between a Mobile Host (MH) and its home network, and between the home network and the Access Network (AN), in addition to one implicit trust relation between the MH and the AN as shown in Figure 6.1. The implicit trust relation between the MH and the AN is often dynamically established during the handover attachment to the AN. The MH and the AN must verify each other during the handover to make sure that both hold a trust relation to MH’s home network. Such identity verification in a handover, better known as mutual authentication, often needs the involvement of the home network. - 111 -
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 and 10:
LIST OF FIGURES Figure 7.2 A generi
Page 11 and 12:
ABSTRACT New access technologies su
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
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
DYNAMIC NEIGHBOUR TRUST INFORMATION
Page 71 and 72: DYNAMIC NEIGHBOUR TRUST INFORMATION
Page 93 and 94: Chapter 5 TRUST ASSISTED HANDOVER A
Page 95 and 96: TRUST ASSISTED HANDOVER ALGORITHM F
Page 121: TRUST ASSISTED HANDOVER ALGORITHM F
Page 125 and 126: PROXY BASED AUTHENTICATION LOCALISA
Page 147 and 148: MULTI-INTERFACE MOBILE MODEL FOR ME
Page 169 and 170: CONCLUSIONS AND FUTURE RESEARCH WOR
Page 171 and 172: CONCLUSIONS AND FUTURE RESEARCH WOR
Page 173 and 174:
CONCLUSIONS AND FUTURE RESEARCH WOR
Page 175 and 176:
ABBREVIATIONS 3G 3rd Generation Wir
Page 177 and 178:
ABBREVIATIONS LS Location Server MH
Page 179 and 180:
ABBREVIATIONS THOA Trust Assisted H
Page 181 and 182:
REFERENCES [12] C. Politis, T. Oda,
Page 183 and 184:
REFERENCES [37] Wi-Fi Alliance, "Wi
Page 185 and 186:
REFERENCES presented at IEEE Intern
Page 187 and 188:
REFERENCES [90] R. Verdone and A. Z
Page 189:
REFERENCES [116] K. E. Malki and H.
show all

Handover mechanisms in next generation heterogeneous wireless ...

Create successful ePaper yourself

Delete template?

Save as template?