以PSC為基礎之光學網路架構與群播機制之研究

隨著網際網路的發展，諸多網路應用服務(隨選視訊，高畫質電視…等)皆需要較大的頻寬；然而此類別的網路應用程式同時也必須提供良好的群播服務，若能有一適合於群播的網路架構結合設計良好的群播機制，將能達到更佳的效率。在本論文中，我們探討及研究數種考量優先權之分波多工光學網路架構並配合適當的群播排程機制，以滿足未來寬頻接取網路群播服務之需求。本論文中，我們主要的架構基本上是由光學線路終端設備、用戶端光學網路單元與被動式星狀光學耦合元件所組成的(PSC-WDM-PON)。配合被動式星狀光學耦合元件的廣播特性，使其架構具有群播封包傳送能力；並且探討與以陣列波導光柵的頻寬路由特性為主的(AWG-WDM-PON)網路架構、數個單一PON組成的(TDM-PON)網路架構下，配合設計適當的排程機制，經由模擬結果驗證各個分波多工光學網路架構的群播封包傳輸效能；除外，並以被動式星狀光學耦合元件探討在區域性光學網路架構上的應用-PSC-Star LAN with Priority。我們所考慮的星狀網路節點除了具有一對可快速調整波長的發射器與接收器存取資料通道，另外具有一對固定波長的發射器與接收器存取預約控制通道與中央排程控制器互相傳遞控制封包。在此架構下，配合具優先權考量的排程機制，我們經由模擬分析此排程機制在單星狀光學網路架構中網路效能的表現。

關鍵字

分波多工光學網路；陣列波導光柵；星狀光學耦合元件；群播排程機制

並列摘要

With the development of internet network, a great deal of network application services (VOD, HDTV…etc) need a lot more bandwidth. But the network application services of this classification must offer good multicast service at the same time. If there can be a network structure suitable for multicast and design the good multicast mechanisms at the same time, can reach better efficiency. In this thesis, we probe into and study some WDM-PON with priority and cooperate with the proper multicast mechanisms to provide sufficient network bandwidth for next generation broadband access networks. In this thesis, we first propose a new WDM PON architecture. Our main network structure is the PSC-WDM PON made up by OLT, ONU and PSC basically. We utilize the broadcast feature of the PSC to support the multicast packet transmission efficiently. In addition, we design a proper scheduling mechanism for such network architecture. By using simulation result, we compare the achieved performances with those from AWG-WDM PON architecture and four TDM-PON architecture. Last, we study the PSC application in the optical LAN-PSC Star LAN with Priority. Propose three different multicast mechanisms for be employment in an asynchronous slotted optical star network. Each network node has a tunable transmitter and receiver for accessing wavelength data channel, and has a fixed transmitter and receiver for communicating with central scheduler through the reservation control channel. By using simulations, we analyze achieved performances obtained by deploying these mechanisms under single star network.

並列關鍵字

WDM-PON ； AWG ； PSC ； Multicast Scheduling Mechanisms

參考文獻

[1] Kyeong Soo Kim, “On the evolution of PON-based FTTH solutions,” Information Sciences—Informatics and Computer Science: An International Journal, Volume 149 , January 2003

[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

[5] Maier, M. Scheutzow, M. and Reisslein, M., “The arrayed-waveguide grating-based single-hop WDM network: an architecture for efficient multicasting,” Selected Areas in Communications, IEEE Journal on, Volume 21, Issue 9, Nov. 2003 Page(s):1414 – 1432

[6] C. Fang, D. H. Du, and A. Pavan, “Design of WDM optical passive star networks with tunable transceivers of limited tuning range,” ICC’98, Vol. 1, pp. 192-196, 1998.

國際替代計量

以PSC為基礎之光學網路架構與群播機制之研究

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