近十年來隨著無線通訊的普及，越來越多的使用者相繼經由無線環境進行通訊，而Ad hoc網路就是這種熱門的通訊系統之ㄧ。其系統架構不外乎是建立傳送路徑來進行相互通訊。但就目前基本的路由機制如: DSR、AODV 等皆沒有提出一套機制用來避免網路擁塞，是故當網路中傳送的資料量過多時，有些即時需求(real-time)的資料便無法順利傳送成功，或因為超過延遲時間的限制而導致封包的拋棄，進而造成系統效能降低的反面效果。

本論文以DSR為主要的架構，提出一套允許控制的機制，除了根據頻寬估測來做允許控制以保證資料的傳送之外，並加入多重路徑的觀念，用來提升路徑維護的效能。經模擬結果發現，除了可成功的控制網路流量之外，也提升了傳送的效率，並同時減低了延遲的時間。

For the past ten years, wireless communication becomes more and more popular, much people use the communication by way of the wireless environment, and Ad hoc network is one of the popular communication systems. Its system construction establishes the transmission path to carry on the intercommunication. However, the elementary routing protocol likes DSR and AODV have no mechanism to avoid network congestion. When the network loading becomes heavy, some real-time traffic will be convey un-success or be dropped because of the packet delay exceeds it’s delay upper bound. Therefore, the system efficiency will be decreased.

We propose an admission control based on DSR. It not only contains bandwidth reservation to guarantee the transfer of flow, but also contains multi-path to improve the route maintenance. According to simulation results, we find system traffic effectively will be controlled. It also increases the transmission efficiency and decreases the delay of packet transfer.

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