被動式乙太光纖網路可以用來解決存取網路中頻寬瓶頸的問題。隨著光網路單元(Optical Network Unit)數量的增加，存取網路中的頻寬需求也跟著有顯著的增長。因此，現今被動式乙太光纖網路的傳輸能力必須獲得提升，以因應末端使用者數目的成長，並且滿足未來新興應用程式的傳輸需求。在本篇論文中，我們提出了一套基於陣列式波導光柵的分波多工被動式乙太光學網路系統，使得上下傳的光纖皆可以分別傳輸多種不同的波長。藉由陣列式波導光柵的使用，也使得我們的架構可以達到波長重覆再利用的特性，並且提供光網路單元之間交互溝通的能力。因此，本架構不僅提供到局端的上傳存取，更能讓末端使用者之間做到真正區域網路傳輸的能力。此外，本架構也考量了向下相容現有的IEEE 802.3ah MPCP通訊協定，並且加入了動態頻寬演算法以及服務品質保證的機制，以達成不同光網路單元間分波多工的存取仲裁。

EPONs have been proposed as a means of overcoming the bandwidth bottleneck problem in local access networks. The traffic demands imposed on an access network increase significantly as the number of ONUs increases. Therefore, the capabilities of current EPONs must be enhanced in order to accommodate the growth in the number of end users anticipated in the near future as emerging applications become increasingly mainstream. Accordingly, this study proposes a novel WDM EPON system based upon an AWG module, in which multiple wavelengths are established in both the upstream and the downstream fibers. The use of the AWG enables the WDM EPON architecture to achieve wavelength spatial-reuse and to provide an intercommunication capability between ONUs. As a result, the architecture not only allows upstream access to the central office, but also facilitates a truly-shared LAN capability amongst the end users. Furthermore, the proposed WDM EPON scheme takes account of the requirement for backward compatibility with the IEEE 802.3ah MPCP protocol and incorporates a DBA scheme and a QoS provisioning mechanism to arbitrate the access of the individual ONUs over the WDM layer.

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