傳統同步數位架構接取網路 (Synchronous Digital Hierarchy Access Network) 在傳遞 IP 封包或 Ethernet 框架時，多使用 HDLC (High-level Data Link Control) 或 ATM (Asynchronous Transfer Mode) 的封裝形式。HDLC 的封裝形式雖然簡單，但是傳輸效能無法精確掌控，也不能滿足未來對網路服務品質更高的要求控管。ATM 儘管功能強大，但是相對的網管也十分複雜，對於簡單或小型的網路應用而言很不經濟。

GFP (Generic Framing Procedure) 格式的使用可以改進 HDLC 的效能並降低系統的複雜度；但是目前GFP 在快速路由、服務品質控管、路徑保護等流量工程方面並沒有相關配套機制。因此，引入多重協定標籤交換技術 (MPLS, Multi-Protocol Label Switch) 不但可以加速封包傳遞，也讓 GFP 封包可以在光纖傳輸網路間進行交換並達到全域性的流量工程控管。

本研究除了分別探討 GFP 與 MPLS 的相關研究外，也嘗試使用 GFP 承載 MPLS 封包的實作，最後以點對點的網路形式測試效能並探討其優缺點。

In current internet communication, the High-level Data Link Control (HDLC) or Asynchronous Transfer Mode (ATM) protocol is used to deliver IP packets or Ethernet frames through the Synchronous Digital Hierarchy Access Network. Although the encapsulation of HDLC protocol is simple, the transmission efficiency can not be precisely measured and assured. It can also not meet the higher required quality of service for future applications. ATM supports sophisticated traffic engineering features, but its operations are very complex. It is not an economy scale for simple point-to-point applications over broadband switching networks.

Generic Framing Procedure (GFP) provides the utilities for encapsulating fixed or variable length packets over Synchronous Digital Hierarchy (SDH) or Optical Transport Network (OTN) protocols. Using GFP (Generic Framing Procedure) transport can improve the efficiency of HDLC and reduce the system complexity. However, GFP transport is now short of traffic engineering mechanisms, e.g. fast rerouting, quality of service, path protection. Multi-Protocol Label Switch (MPLS) can deliver the packets over the internet quickly by using switching mechanism.

The object of this thesis is to evaluate the performance of MPLS over GFP. Both of GFP and MPLS are evaluated firstly. Then the implementation of MPLS over GFP is described. The experimental results for point-to-point network are discussed. It is shown that the cooperation with MPLS can not only deliver packet faster, but also switch GFP frame over the optical networks with sophisticated global traffic controlling mechanisms.

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