能支援群播服務之分波多工被動式光學網路的架構

A WDM Passive Optical Network Architecture for Multicasting Services

林澤賢(Tse-Hsien Lin)

指導教授 ： 吳和庭

國立臺北科技大學/機電學院/資訊工程系所/碩士(2005年)

https://doi.org/10.6841/NTUT.2005.00185

摘要

隨著網際網路的發展以及使用者數量不斷增長，通訊網路所需的頻寬亦與日俱增。在目前，擷取網路頻寬的不足，已成為寬頻網路應用發展之最大障礙之一。因此，在本論文中，我們探討及研究如何利用分波多工被動式光纖網路做為寬頻接取網路的基本架構，以滿足未來寬頻接取網路支援各式服務之需求。
本論文中，我們主要的架構是在光線路終端設備〈Optical Line Terminal, OLT〉上是以一個陣列波導光柵〈Arrayed Waveguide Grating, AWG〉和多個可調式波長之雷射訊號發射器〈Tunable Lasers, TLs〉所構成的，而在用戶端光網路單元〈Optical Network Unit, ONU〉上則以一個可調式波長之雷射訊號發射器和一個可調式波長之接收器〈Tunable Receiver〉所構成的。而在此架構上，可以利用頻寬路由與廣播的特性，做到在接取網路端達成群播封包與單一封包下載傳送，也可以利用陣列波導光柵這個元件的特性，做到頻寬再利用的特性。而在此架構下，若無適當的排程機制會使得在使用者端產生接收碰撞的狀況發生。所以在此論文中，提出了一個群播排程演算法，並且比較封包在SUCCESS-DWA PON與本論文所提的網路架構之單點傳輸效能以及比較在AWG-Based架構和PSC-Based架構之間的群播封包傳輸效能。最後，我們將擴充性的問題加入到我們所提出的網路架構上，並且與其他的網路架構做比較。

關鍵字

陣列波導光柵 ； 波長路由 ； 波長再利用 ； 排程機制

並列摘要

With the advance of internet, application and the increase of internet users, the bandwidth requirement of broadband network is ever increasing. Currently, the limited bandwidth provided by the access networks has become the main bottleneck for future internet developments. Thus, in this thesis, we investigate the usage of WDM PON technology as the broadband access networks to provide sufficient network bandwidth for next generation broadband access networks.
In this thesis, we first propose a new WDM PON architecture. The AWG and many TLs constitute the key components of OLT in this network. The ONU consists of one TL and one TR. We utilize the wavelength-routing capability of the AWG and the broadcast feature of the PSC to support the unicast and multicast packet transmission efficiently. In addition, we design a proper scheduling mechanism for such network architecture to resolve the potential receiver collision problems. By using simulation result, we compare the achieved performances with those from SUCCESS-DWA PON, AWG-based architecture and PSC-based architecture. Last, we study the scalability issues related to our proposed architecture as well as aforementioned other architectures.

並列關鍵字

Arrayed-Waveguide Grating ； Wavelength-routing ； Wavelength spatial reuse ； Scheduling Algorithm

參考文獻

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[2] Glen Kramer and Gerry Pesavento, “Ethernet Passive Optical Access Network (EPON): Building a Next-Generation Optical Access Network,” Communications Magazine, IEEE , Volume: 40 , Issue: 2 , Feb. 2002, Pages:66 - 73

[3] Fu-Tai An, Kyeong Soo Kim, Yu-Li Hsueh, Matthew Rogge, Wei-Tao Shaw, and Leonid Kazovsky, “Evolution, Challenges and Enabling Technologies for Future WDM-Based Optical Access Networks,” Joint Conference on Information Sciences, September 2003

[4] W.T. Tseng and S.Y. Kou, “A combinational media access protocol for multicast traffic in single-hop WDM LANs,” Proc. IEEE GLOBECOM’98, 1998, pp.294 - 299

[5] H.-C. Lin and C.-H. Wang, “A hybrid Multicast Scheduling Algorithm for Single-Hop WDM Networks,” Proc. IEEE INFOCOM’2001, 2001, pp. 169-178.