近年來由於新世代的寬頻無線存取技術蓬勃發展，WiMAX 與WiFi 已然成為最被受矚目的無線都會網路以及無線區域網路技術。利用WiMAX 的特性可提供WiFi 熱點後置式網路服務，使得散佈在WiMAX 覆蓋範圍內的WiFi 熱點都可透過WiMAX 存取網際網路服務。對於這樣的應用，一個最主要的問題即是如何有效的去設計一個共存的系統以整合此兩種技術。因此，本論文提出一個新穎的整合型架構。在此架構當中，經由利用本論文所提出的WiMAX/WiFi存取點(W2-AP)，可有效的整合WiMAX 與WiFi 兩種異質性網路。在本論文所提出的架構中，WiFi 熱點的媒介存取協定運作方式相似於WiMAX 寬頻無線存取技術。因而，WiFi 熱點可支援以連結為導向的傳輸模式，進而提供與WiMAX一致性的網路服務品質，並且可以降低從WiFi 使用者到WiMAX 基地台的延遲時間。本論文使用Qualnet 軟體模擬所提出的網路架構。經由模擬所得到的數據可驗證本論文所提出的整合型網路架構可有效的使用在無線寬頻的網路環境中。

WiMAX and WiFi have emerged as promising broadband access solutions for the latest generation of wireless MANs and LANs, respectively. Their complementary features enable the use of WiMAX as a backhaul service to connect multiple dispersed WiFi hotspots to the Internet. One of the major problems for enabling WiMAX to provide backhaul service to WiFi hotspots is designing a coexistence system to effectively integrate WiMAX and WiFi techniques. Accordingly, this thesis proposes an integrated architecture utilizing a novel WiMAX/WiFi Access Point (W2-AP) device to effectively combine the WiMAX and WiFi technologies. In the proposed architecture, the protocol operation of the WiFi hotspots is the same as that of the WiMAX system. As a result, the WiFi network can support connection-oriented transmissions and QoS in a similar fashion to the WiMAX system, and thus a considerable improvement in the delay performance is obtained. The numerical results obtained using a Qualnet simulator confirm both the effectiveness and the efficiency of the proposed architecture.

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