Belghoul, Farouk (2005) Mécanismes de Gestion de Mobilité Généralisée dans un Système Hétérogène Fixe/Mobile. PhD thesis Telecom, Institut Eurécom - Communication Mobile, ENST.

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Abstract

Le support de la mobilité dans les protocoles réseaux existants est devenu primordial, à cause du nombre croissant d'utilisateurs de terminaux mobiles désirant garder une connexion constante au réseau, tout en se déplaçant librement à travers des segments de réseaux d'accès sans fil hétérogènes.
Le protocole de routage dominant dans les architectures réseaux filaires est IP "Internet protocole". Ce protocole est en passe de dominer aussi le mode des réseaux sans fils. Ainsi, il est naturel d'introduire des mécanismes de gestion de mobilité basés sur IP, dont un processus de handover (passage d'une point d'accès radio à une autre point) efficace et flexible afin de garantir aux utilisateurs une qualité de service minimale de transmission des donnés. En effet, un handover inefficace génère de la latence, de la gigue et des pertes de paquets. La transmission des données est affectée et dégrade la qualité de services de l'application utilisant les services du réseau.
Dans cette thèse, nous examinons et analysons d'abord la complexité et l'efficacité des principales techniques de handover et de gestion de mobilité basée sur IP. Les résultats de cette analyse seront ensuite exploités pour présenter finalement notre proposition de soft handover basé sur IPv6. Cette solution permettra l'extension de mobile IPv6 avec une gestion efficace, transparente et locale du multihoming. Bien sur la duplication des flux est bidirectionnel entre le réseau et le mobile et permet un changement de point d'accès au réseau sans perte de données.
Nous analysons ensuite les performances de notre approche à travers des résultats de simulations. Ces simulations sont effectuées dans un simulateur développé par notre équipe nommé Gemini2. Cette partie inclut également une comparaison des performances par rapport au fast handover bicasting et Mobile IPv6 basique.
Finalement, le dernier chapitre de la thèse inclut notre expérience de l'implémentation d'un prototype mobile multi interfaces et un testbed mobile IPv6 soft handover. Cette implémentation a comme but principal la validation de nos travaux. Ce banc de test nous permettra, en plus, d'analyser les performances du soft handover dans des conditions réelles et avec différents types d'applications et de flux multimédia.

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Table of content

Contents
I. INTRODUCTION - 12
1. TERMINOLOGY - 13
2. PROBLEM OVERVIEW - 14
3. OUTLINE OF THE DISSERTATION - 15
4. PHD RELATED PUBLICATIONS AND APPLICATIONS - 16
II. STATE OF THE ART - 18
1. HANDOVER IN MOBILE COMMUNICATION SYSTEMS - 18
2. INTERNET PROTOCOL NEXT GENERATION - 20
2.1. Expanded Addressing Capability and Autoconfiguration Mechanisms - 20
2.2. Simplification of the Header Format - 23
2.3. Improved Support for Extensions and Options - 25
2.4. IPv6 in IPv6 Packet Encapsulation "IPv6 Tunnels" - 27
3. INTERNET PROTOCOL AND MOBILITY REQUIREMENTS - 29
3.1. Mobile IP - 32
4. CONCLUSION - 34
III. ANALYTICAL STUDY OF IP BASED HANDOVER MANAGEMENT PROTOCOLS - 36
1. INTRODUCTION - 36
2. MOBILE IP - 38
3. MOBILE IPV6 - 39
4. HIERARCHICAL MOBILE IP - 42
5. SMOOTH HANDOVER - 45
6. FAST HANDOVER - 47
7. HANDOVER COMPARISON SUMMARY - 50
8. SPECIAL CASE STUDIES, HANDOVER EFFECTS ON TCP - 53
8.1. TCP Response to Lost Packets - 53
8.2. TCP versions & packet loss - 54
8.3. MIPv4 & MIPv6 handovers - 54
8.4. Fast Handover - 55
8.5. Smooth handover - 56
9. CONCLUSION - 57
IV. PROPOSED MECHANISMS TO INTRODUCE IPV6 SOFT HANDOVER IN MOBILEIPV6 - 58
1. PROBLEM OVERVIEW - 58
2. MULTIHOMING AND MOBILE REGISTRATION - 61
2.1. Multihoming in mobile IPv6 - 61
2.2. Existing Design Possibilities - 63
2.3. Soft Handover Multihoming Design Requirement - 64
2.4. D&M router for MIPv6 multihoming and Soft-handover management - 65
2.5. Description of registration and signaling procedure - 66
2.6. Signaling messages for mobile IPv6 soft handover - 69
3. IPV6 FLOWS DUPLICATION PROCESS - 72
3.1. Downlink duplication process - 72
3.2. Uplink duplication process - 76
4. IPV6 FLOWS MERGING PROCESS - 77
5. HANDOVER PROCESS - 80
6. SOFT HANDOVER ANALYSIS - 82
7. CONCLUSION - 83
V. SIMULATION RESULTS AND PERFORMANCES ANALYSIS - 86
1. SIMULATION ENVIRONMENT - 87
2. PERFORMANCES METRICS - 92
3. SIMULATION SCENARIOS - 92
4. BASIC MOBILE IPV6 AND SOFT HANDOVER PERFORMANCES - 94
5. PROTOCOLS PERFORMANCES COMPARISON - 100
6. CONCLUSION - 109
VI. HIERARCHICAL D&M AGENTS ARCHITECTURE - 110
1. HIERARCHICAL ARCHITECTURE PROPOSAL - 110
2. HIERARCHICAL ARCHITECTURE PERFORMANCE EVALUATION - 114
3. CONCLUSION - 116
VII. MOBILE & TESTBED IMPLEMENTATION - 118
1. IMPLEMENTATION ENVIRONMENT - 120
1.1. Linux Operation System - 120
1.2. Mobile IP for Linux (MIPL) Environment - 122
2. IMPLEMENTATION DESIGN - 123
2.1. Assumptions and Limitations of the Platform - 123
2.2. D&M Router - 124
2.3. Mobile Node - 126
3. TEST BED CONFIGURATION AND MEASUREMENT ENVIRONMENT - 129
4. MEASUREMENTS AND EVALUATION - 131
4.1. ICMP6 Bidirectional flows - 135
4.2. UDP Performances - 137
5. CONCLUSION - 141
VIII. CONCLUSION & OUTLOOK - 142
REFERENCES - 145
APPENDIX A - 152
"DESCRIPTION OF EXTENDED MODULES, FUNCTION AND DATA STRUCTURES IN TEST BED IMPLEMENTATION" - 152

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