| Summary: | 碩士 === 國立臺北科技大學 === 資訊工程系碩士班 === 91 === Optical fiber, with its ample bandwidth and extremely low bit error rate in transmission, has evolved to be the best choice of transmission medium for high-speed communication networks. Therefore, optical network structure has been popularity on assignment for discussion. In the thesis, first, we study of delay line optical switch architecture. Second, we design and probe efficient fairness access control schemes for FT-TR all-optical WDM packet switching slotted ring network.
First, we propose a new efficient contention resolution switching architecture which can be used in all optical networks. The proposed solution is built upon an original 2-stage multi-buffer delay lines Quadro (M-Quadro) switch node. By incorporating buffer lines into the M-Quadro architecture and employing a novel switch control strategy, denote as LAVS, the switching node can effectively reduce the packet deflection probability. It is shown via simulation that such a switching fabric with buffer lines exhibits better performance and efficiency than that achieved by the M-Quadro architecture.
Second, we propose fairness control algorithms which can effectively resolve fairness problem on data transmission for FT-TR all-optical WDM packet switching slotted ring network. The fairness access protocol, Multi Fair and Efficient Cyclic Control Algorithm (M-FECCA), to achieve global fairness property for such a full-duplex spatial-reuse WDM ring. This scheme can yield high network throughput levels while still maintaining a guaranteed bandwidth-sharing property. Furthermore, in order to avoid receiver collision on data transmission that may lead unfairness occurred locally in the ring. We then propose a local fairness access protocol, the Round Robin Control Algorithm (RRC) by employing the concept of TDMA. As the simulation result, by using FECCA and RRC fairness control algorithm can increase the effectiveness to achieve a high network throughput and decrease the propagation delay time of data transmission for FT-TR all-optical WDM packet switching slotted ring network.
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