近年來，由於接取網路(Access Network)技術的蓬勃發展，出現許多令人為之振奮的技術，如光纖混合同軸電纜(Hybrid Fiber Coaxial, HFC)、數位用戶迴路(Digital Subscriber Line, DSL)、全球互通微波存取(Worldwide Interoperability for Microwave Access, WiMAX)與光纖到府(Fiber to the Home, FTTH)等等技術；其中使用乙太被動式光纖網路(Ethernet Passive Optical Network, EPON)的光纖到府技術，具有距離遠(可達20公里)、頻寬大(上傳/下傳皆為1 Gbps)與群播天性(Multicast Natural)等優點，使得乙太被動式光纖網路非常適合用來提供頻寬需求大的服務，因此造就了頻寬需求大的應用如雨後春荀般的大量冒出，像是網路電話(Voice over IP, VoIP)、互動遊戲(Interactive Game)、視頻會議(Video Conferencing)和網際網路協定電視(Internet Protocol TV, IPTV)等，其中又以網際網路協定電視被視為是一項殺手級的運用(Killer Application)。
固然乙太被動式光纖網路非常適合用於提供網際網路協定電視，但是由於接取網路與核心網路(Core Networks)先天上的頻寬落差，針對高頻寬需求的網際網路協定電視而言，在其經由核心網路到接取網路時，若沒有一套有效的允入控制來決定哪些網際網路協定電視頻道可以進入接取網路中，而只是無止盡的讓網際網路協定電視頻道不斷的進入乙太被動式光纖網路(EPON)中，那麼網際網路協定電視服務勢必癱瘓整個接取網路，造成資料、聲音與影像(合稱Triple-play)這些服務的封包隨意的被丟棄(Drop)，而大大的降低了triple-play服務的服務品質(Quality of Service)。因此本論文針對運行網際網路協定電視服務於乙太被動式光纖網路中提供一套熱門頻道優先的允入控制演算法。

The evolution of technologies in access network are expediting much quicker in the recent year, such as Digital Subscriber Line (DSL), Wireless Network (WiFi and WiMAX), Cable Network (Hybrid Fiber Coaxial, HFC) and Ethernet Passive Optical Network (EPON). The downlink/uplink bandwidth increase dramatically. Thus more and more bandwidth-intensive applications are emerging, such as Voice over IP (VoIP), video conferencing, interactive gaming and IPTV (Internet Protocol Television, IPTV).
In the access technologies mentioned above, Ethernet Passive Optical Network (EPON) with high speed downlink bandwidth is suitable for carrying Internet Protocol Television (IPTV) service. Many papers had proposed some multicast mechanisms to make EPON carry IPTV real. However, without an effective admission control to determine which IPTV channel requests from users can enter the EPON, the high bandwidth demand of IPTV service will paralyze the EPON. In this thesis, we propose a popular channel first (PCF) admission control (AC) algorithm for deploying IPTV service over EPON. Finally, simulation results show that our propose algorithm can improve the bandwidth utilization (more scalable) and can satisfy more IPTV channel requests.

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