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Table of contents
1 General Introduction
1.1 Evolution of Wi-Fi Networks towards 5G
1.1.1 Wi-Fi Offload and Roaming
1.1.2 Voice over Wi-Fi
1.1.3 5G-oriented Technologies
1.2 Carrier-grade Wi-Fi Networks
1.3 Problem Statement
1.4 Contributions
1.4.1 Personalized and Seamless Access to Wi-Fi Services
1.4.2 NFV- and Cloudlet-based Carrier Wi-Fi Architecture
1.4.3 VNF Placement and Provisioning in Carrier Wi-Fi Network
1.5 Thesis Outline
2 Service Discovery and Access in CarrierWi-Fi Networks
2.1 Introduction
2.2 User Experience and Service Discovery in Wi-Fi Networks: State of the Art
2.2.1 Existing Standards
2.2.1.1 IEEE 802.11u and Hotspot 2.0 (Network Discovery)
2.2.1.2 Wi-Fi Aware (Peer-to-Peer Service Discovery)
2.2.2 Service Discovery Approaches
2.2.2.1 Post-association Service Discovery
2.2.2.2 Pre-association Service Discovery
2.2.3 Summary
2.3 Personalized and Seamless Access to Wi-Fi Services
2.3.1 Pre-association Discovery of Local Services
2.3.2 Unique and Global Service Identifiers
2.4 Analysis
2.4.1 The Client Perspective
2.4.1.1 Link Setup Time
2.4.1.2 Power Consumption
2.4.1.3 User Experience and Satisfaction
2.4.2 The Network Operator Perspective
2.4.2.1 Bandwidth Usage
2.4.2.2 Ease of Deployment
2.5 Use Case Examples
2.6 Conclusion
3 Next-Generation CarrierWi-Fi Architecture
3.1 Introduction
3.2 Background and State of the Art
3.2.1 Evolution of WLAN Architectures
3.2.1.1 Autonomous WLAN Architecture
3.2.1.2 Centralized WLAN Architecture
3.2.1.3 Distributed WLAN Architecture
3.2.1.4 Virtualized WLAN Architecture
3.2.1.5 Summary
3.2.2 Emerging Concepts for Future Wireless Networks
3.2.2.1 Network Function Virtualization
3.2.2.2 Emerging Cloud Computing Models
3.3 NFV- and Cloudlet-based Carrier Wi-Fi Architecture
3.3.1 System Description
3.3.1.1 WLAN Cloudlet
3.3.1.2 Wireless Termination Points
3.3.1.3 Cloud-Based Platform
3.3.2 Benefits and Possible Applications
3.3.2.1 Benefits
3.3.2.2 Possible Application Scenarios
3.3.3 Challenges
3.4 Feasibility and Implementation
3.4.1 Case Study
3.4.2 Implementation Aspects
3.4.3 Performance Evaluation
3.4.3.1 Delay
3.4.3.2 Throughput
3.5 Conclusion
4 Service Management in NFV-oriented CarrierWi-Fi architecture
4.1 Introduction
4.2 Virtual Machine Placement in Virtualized Environments: State of the Art
4.2.1 Analysis of Existing VMP Approaches
4.2.1.1 Optimization Problem Formulation
4.2.1.2 Computing optimized VM placement
4.2.2 Related Literature Review
4.2.2.1 VM Placement across Geographically Distributed Clouds .
4.2.2.2 VM Placement in Hybrid Clouds
4.2.2.3 VNF Placement
4.3 QoS-driven VNF Placement and Provisioning in Edge-Central Carrier Cloud Architecture
4.3.1 System Modeling
4.3.1.1 Performance Model
4.3.1.2 QoS Model
4.3.2 Problem Description and Formulation
4.3.3 Solutions Description
4.3.3.1 Trade-off between Cloudlet Utilization and QoS Violation (To-CUQV)
4.3.3.2 Fixed QoS Violation Threshold (FQVT)
4.3.3.3 Fixed Maximum Cloudlet Utilization level (FMCU)
4.4 Performance Evaluation
4.4.1 Simulation Settings
4.4.2 The Baseline Approach
4.4.3 Performance Metrics
4.4.4 Simulation Results
4.5 Conclusion
5 General Conclusion
5.1 Summary of Contributions
5.2 Future Work
5.3 Publications
5.4 WBA Projects
List of Figures
List of Tables
References
