近幾年來，綠能通訊的議題逐漸受到重視。在此議題下，我們根據Shannon capacity的公式提出兩個可以提供服務品質保證的特殊節能概念。第一個概念是當干擾降低時，節點可以用較低的傳送功率。第二個概念是當通道較為空閒時，節點可以佔用較多頻寬，以節省傳送功率。

　　為了實現上述兩個節能的概念，我們設計出一個可運用在多重傳輸速率與多躍式無線隨意網路並結合功率控制的跨層架構。藉由我們實驗室提出的分時多工架構，我們可以了解通道的狀況，並動態的調整資料時槽的預約，去節省傳送功率的消耗。經由模擬結果可以證實，我們設計的方法可以在不降低吞吐量的情況下，達到節能的效果。

　　In recent years, green communication has become an important issue. In the thesis, we propose two specific energy-saving concepts offering quality-of-service. First, when interference decreases, node can transmit with less power. Second, when channel is less occupied, node can use more bandwidth to save transmission power.

　　To realize the energy-saving concepts, we design a cross-layer architecture with power control in multi-rate multi-hop wireless ad hoc networks. By TDMA structure our laboratory proposed, we can get aware channel conditions, and adjust time slot on demand to save transmission power. We perform simulations to verify that the proposed scheme can save total energy consumed without decreasing throughput.

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