光纖分波多工被動星狀耦合器網路之高效能媒介存取控制方法設計與效能分析

Design and Performance Analysis of a High-Performance Medium Access Control Scheme for an Optical WDM Passive Star Coupler Network

張憲騰(Shien-Teng Chang)

指導教授 ： 趙一芬

元智大學/電機通訊學院/電機工程學系/碩士(2013年)

https://doi.org/10.6838/YZU.2013.00262

摘要

在這篇論文中，有個重點在於提出的方法是一個可以藉由不同具有擴充性的節點架構去達到公平分配傳送並和效能達到很好平衡的演算法。除此之外，當在設計這個媒介存取控制機制時，還有一個重要的議題就是系統成本的考量。
為了找出低成本的系統硬體，每個節點去搭配具有擴充彈性的高成本TT-TR或者低成本的TT-FR去增加更有效率的頻寬分配。在本質上，整個系統架構是受媒介存取控制機制所控制。我們提出來的媒介存取控制機制根據了頁框架構的資料排程，展現出很高效率且很公平的頻寬分配。因為頁框架構降低了碰撞問題的影響並且為了去調節公平的使用頻寬，使用了優先輪流傳送的方式。除了上述之外，為了達到節省頻寬的因素，不透過額外的通道去傳送控制訊息。我們模擬的結果證明了，我們提出的方法搭配不同的節點架構，在不同的系統負荷之下達到了期望的效果。此外，在伺服端節點與用戶端節點的傳送環境之下，在所有節點皆為TT-FR時，平均延遲會造成上升很高，幸好發現當只要改變在接收大量資料的伺服端節點架構為TT-TR，就可以改善整體的平均延遲，也明顯得到降低了整個系統成本。

關鍵字

媒介存取控制機制 ； 公平的頻寬分配 ； 具有擴充彈性硬體 ； 低成本的系統硬體

並列摘要

In the thesis, it is important that the proposed scheme is able to achieve good balance between fairness and throughput by different scalable node architectures. In addition, the system cost is also an important issue that has to be addressed when designing the media access control (MAC). In order to find the low cost of system hardware, each node has flexible node architecture that is equipped with high-cost TT-TR or low-cost TT-FR resulting in an increase in bandwidth efficiency. In essence, the system architecture is governed by a MAC scheme. The proposed scheme embodies a highly efficient and fair bandwidth allocation in accordance with frame based data scheduling. Because the frame based is reduced the impact of the collisions and used a preferentially rotate transmission method for regulating a fair use of bandwidth. Besides, the control information is not transmitted through an additional channel that is achieved the effect of saving bandwidth. Our simulation results show that different node architectures with the proposed method achieve exceptional performance under a wide range of traffic loads and burstiness. In addition, under server-client traffic pattern, the mean delay of TT-FR system drops. Fortunately, only changing the server node (which receives large amount of traffic) to TT-TR greatly improves the overall mean delay, resulting in significantly reducing the system cost.

並列關鍵字

media access control ； a fair use of bandwidth ； flexible node architecture ； the low cost of system hardware

參考文獻

[1] Papadimitriou, G.I., Papazoglou, C., Pomportsis, A.S., “Optical Switching: Switch Fabrics, Techniques, and Architectures,” IEEE Journal of Lightwave Technology, vol. 21, no. 2, pp. 384-405, Feb. 2003.

[2] J. McDonough, “Moving Standards to 100 GbE and Beyond,” IEEE Communications Magazine, vol. 45, no. 11, pp. 6-9, Nov.2007.

[3] R. Ramaswami, “Multi-Wavelength Lightwave Networks,” IEEE Communication Magazine, vol. 31,no.2, pp. 78-88,Feb. 1993.

[4] Paul Green, “Progress in Optical Networking,”IEEE Communications Magazine, vol. 39, no. 1, pp. 54-61, Jan. 2001.

[5] Dirceu Cavendish, “Evolution of Optical Transport Technologies: from SONET/SDH to WDM, ”IEEE Communication Magazine, vol. 38, no. 6, pp. 164-172, Jun. 2000.