目前都會型區域網路，隨著傳輸資料量快速增加，架構在波長分割多工 (Wavelength Division Multiplexing; WDM) IP封包傳送將取代傳統光纖網路(SONET)傳送。而以波長分割多工網路IP封包傳送的方式需要新的存取協定來使多個網路節點更有效的分享網路頻寬。本論文提出一個將IP封包直接架構在WDM環狀網路上的傳輸存取協定，是以載波感測多重存取控制機制(Carrier Sense Multiple Access; CSMA)為基礎，再加上讓載波在資料通道上有優先 (Carrier Preemption; CP)於節點傳送資料的新協定；這個協定我們稱為CSMA/CP。
再者目前傳統的IP封包僅提供盡量傳送(Best Effort)方式，而以服務品質(Quality of Service; QoS)的IP傳送方式已成為多媒體傳送的重要課題。本論文接著提出具有服務品質的CSMA/CP (QoS-aware CSMA/CP)存取協定；本協定利用CSMA/CP與QoS的機制來提供具全光式且服務品質在WDM環狀網路傳送IP封包。
經過分析與模擬的結果，證明新的存取協定是有效率而且實用；此網路架構與協定將是下一代都會型網路不錯的選擇。

As data traffic increase rapidly, IP over WDM (Wavelength Division Multiplexing) transport will replace conventional SONET transport in current metropolitan area networks. Such networks will require new MAC protocols to efficiently share network bandwidth among multiple network nodes. The thesis describes and evaluates a novel Carrier Sense Multiple Access with Carrier Preemption (CSMA/CP) MAC protocols for IP over WDM ring networks.
Moreover since the traditional IP provides the best effort service only, supporting IP packets with QoS (Quality of Service) transfer has become a crucial issue for multimedia transmission. The thesis accordingly proposes QoS-aware CSMA/CP MAC protocol. It uses the concepts of CSMA/CP and the QoS mechanism to support all-optical and QoS-aware transferring of the IP packets of the nodes in the WDM ring networks.
Analysis and simulation results show that the proposed MAC protocols are efficient and practical and will be an excellent candidate for next-generation metro networks.

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