傳輸電力控制在隨意無線網路環境中是指各傳輸節點針對每傳輸封包，選擇適當傳輸電力去達到目的端。傳輸電力控制影響了訊號的強弱，決定收到訊號的鄰近節點，也決定可能造成頻寬競爭的訊號干擾。因此，傳輸電力控制影響了整個無線網路的效能，如網路吞吐量、節點間傳輸的延遲以及能量的消耗量。
在本論文中，我們提出一個建構在路由協定上分散式的傳輸電力控制方法，以不降低網路吞吐量情況下且達到減少能量的消耗。我們的動機是在原本的路徑上尋找更多的中繼節點幫忙做傳輸。相較於最小固定傳輸電力的方法 [26]，我們使用多種傳輸電力的選擇，達到較低的延遲及網路產量。我們也針對移動性的隨意無線網路，預測節點移動性，確保封包傳輸率。

Transmission power control in wireless ad hoc networks is to select a proper transmission power to transmit packets to the intended receivers at each node. Transmission power control affects the transmitting signal strength, so it determines the neighboring nodes that can hear the transmitting signal, and creates excessive interference which may cause contention at the neighboring nodes. As a result, it affects the performance of the network, such as network throughput, end-to-end latency and energy consumption.
In this thesis, we propose a distributed transmission power control scheme, which does not degrade throughput and reduces energy consumption, on routing protocols. The main idea of our proposed scheme is to discover more intermediate nodes to help forward packets between the original forwarding nodes pairs which discovered by the shortest-path based routing protocols. Our proposed approach also is a variable-range transmission power control based protocol, thus it can achieve lower latency and higher network capacity while compared with the common-range minimum transmission power control protocol [26]. We also expect the mobility of nodes to adjust the transmission power to ensure a high packet delivery ratio in the wireless mobile ad hoc networks.

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