| Summary: | 博士 === 元智大學 === 資訊工程學系 === 103 === Demands for multimedia applications have been rapidly increased during the last decade. It is predicted that a video traffic will be approximately 80 to 90 percent of the global consumer traffic by 2018. IPTV provides subscribers more choices and interactivity, yet provides exciting new revenue and opportunities for the service providers. The major challenge of delivering IPTV content to the end user is the high-bandwidth requirement with providing enough degree of QoS and QoE for users to receive the content smoothly and continuously. The bottleneck to deliver the IPTV services to the end users is the access network. Between the access networks technologies, the Ethernet passive optical network (EPON) is one of the best solution for the intensive application such as IPTV that will be superseded in next years because of the cost-efficient, providing high bandwidth and environmentally friendly manner. However, the current delivery architecture is not efficient enough for IPTV content delivery because the EPON processes the traffic up to link layer that pass through the incoming traffic without concerning about nature of traffic. Moreover, EPON topology cannot handle the traffic among the optical network units (ONUs) or ONU and users without referring to the feeder fiber as intra-traffic. Furthermore the video serving office (VSO) is responsible for multicasting which wastes a huge amount of bandwidth inside the EPON between optical line terminal (OLT) and ONUs. consequently this thesis aims to achieve the high-performance IPTV delivery architecture (i.e., VoD and live) and schemes over EPON with regarding to the architecture enhancement, cross layer protocol design, traffic localization, resource allocation and QoE improvement in order to achieve high performance and robust IPTV streaming. The framework is designed and includes VoD Engine, live IPTV Engine, Cross Layer Protocol Design, Traffic Classifier, Packet Processing Engine and QoS/QoE components to handle different IPTV applications. Where the VoD Engine uses the benefit of distributed caching mechanism to localize the VoD traffic, the Live IPTV Engine provides efficient broadcasting and multicasting IPTV delivery mechanism. The IPTV delivery mechanism based on the video frame buffering is designed to improve the QoE in terms of the startup delay and channel changing time delay. Moreover, the cross layer protocol design approach is employed to remove the restriction of higher layer information access in the data link layer and improve the flexibility of the system. Simulation results show that the proposed framework, architectures and delivery mechanisms significantly improves the QoE and QoS in terms of system throughput, mean packet delay, packet loss, jitter and zap time.
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