在隨意網路上結合排程與功率控制之研究

在本篇論文中我們探討在Ad Hoc網路環境下結合排程與功率控制的跨階層的設計來解決多重存取的問題，研究的動機為如何降低多用戶(Multiuser)的干擾和減少功率的消耗以增加傳輸量與延長電池的壽命。我們重點放在鄰近點的傳輸，當使用者要傳輸資料封包時必須限制其SINR值，避免功率過度的消耗。經由排程的演算法決定哪些使用者可以傳輸，先一步將大部份的干擾消除這是無法用單純的功率控制做到。而在功率控制方面，也可以更進一步的減少干擾與功率的消耗。在本篇論文中除了探討這最佳化的演算法外，並根據這演算法另外衍生出2個演算法與最佳化的演算法做比較與分析。

關鍵字

排程；功率控制

並列摘要

In this thesis, we introduce a cross-layer design framework which joints scheduling and power control to solve the multiple access problem in the wireless ad hoc networks. The motivation for this study is twofold, one is to limit the multiuser interference to increase the single-hop throughput, and the other is to reduce the power consumption to prolong the battery life. We focus on the next neighbor transmissions where nodes are required to send information packets to their respective receivers subject to a constraint on the signal-to-interference-and- noise ratio. The power control scheme is used to reduce the cochannel interference and the power consumption. On the other hand, the scheduling algorithm is used to determine which user can transmit the information packet so as to eliminate the strong level of interference (e.g., self-interference) that cannot be overcome by the power control. In addition to the study of the optimum algorithm, we further study another two algorithms that are based on the optimum algorithm, and we also make comparisons among the studied algorithms.