矽基液晶技術在通訊網路之應用

本論文採用矽基液晶（LCoS, Liquid Crystal on Silicon）技術，提出全光網路架構設計，元件包括可重構光分插多工器（ROADM, Reconfigurable OpticalAdd-Drop Multiplexer）、L2/L3光分封交換機、光纖調度及量測交換系統。L2/L3光分封交換機採用光輸出緩衝器設計。只有光封包的頭轉換（Header Conversion）為電信號以便控制輸入端光波轉向，讓該封包的內容可以經由光波轉向傳送到輸出端。當一個以上之封包信號光波需到達相同的目地輸出端時，則採用光輸出緩衝器儲存多餘的封包。為了保持原有的服務封包順序，優先等級機制和循環算法的公平性在光輸出緩衝器將被採用。所有輸入端的光波是採用LCoS技術轉向到輸出端。最後光流量交換機採用輸入緩衝器，可快速的把大資料傳送到輸出端，採用光流量交換機主要目的是可減少光的反射數量。同時為了未來大量的影音數據傳輸，也將採用光流量交換機組成全光內容傳遞網路。

關鍵字

矽基液晶；可重構光分插多工器； L2/L3光分封交換機；光纖調度及量測交換系統；光輸出緩衝器；光流量交換機；全光內容傳遞網路

並列摘要

In this paper, an all-optical network including the ROADMs, the L2/L3 optical packet switches, and the fiber optical cross connection for fiber scheduling and measurement based on LCoS (Liquid Crystal on Silicon) technologies is proposed. The L2/L3 optical packet switches are designed with optical output buffers. Only the header of optical packets is converted to electronic signals to control the wavelength of input ports and the packet payloads can be transparently destined to their output ports. An optical output buffer is designed to queue the packets when more than one incoming packet should reach to the same destination output port. For preserving service-packet sequencing and fairness of routing sequence, a priority scheme and a round-robin algorithm are adopted at the optical output buffer. The wavelength of input ports is designed for routing incoming packets using LCoS technology. Finally, the proposed optical flow switch with input buffers can quickly transfer the big data to the output ports and the main purpose of the optical flow switch is to reduce the number of reflections. The all-optical content delivery network is composed of the optical flow switches for a large number of audio and video data transmissions in the future.

並列關鍵字

LCoS ； ROADM ； L2/L3 optical packet switch ； fiber optical cross connection ； optical output buffer ； optical flow switch ； content delivery network

主題瀏覽