超寬頻無線通訊介質存取層之設計與實作

Abstract

超寬頻(Ultra WideBand)無線通訊是目前工業界最受矚目的新興無線通訊技術。它不僅是行動裝置之間互相溝通的高速傳輸媒介，也被期待成為家用電器用以傳遞資料的革命性新發展。由於超寬頻無線通訊可以被應用在各種不同的裝置上，如數位電視，MP3撥放器，個人電腦，或是數位個人助理等,作為互相溝通的橋樑。所以我們必須還要根據不同的應用來考慮傳輸網路的服務品質和傳輸量需求。 本篇論文將會針對各種不同的無線網路的介質存取層對於介質分配的機制作研究和討論。探討在超寬頻無線通訊的特性下，研究出最適合超寬頻無線通訊所需要的運作機制。除了考慮合適的傳輸介質分配方式，還要考慮網路架構的自我調整，並且針對UWB的特殊性質盡量節約電力的消耗。在設計上，我們參考IEEE 802.15.3作為基本架構再加以修改並增加功能，我們提出了新的MAC運作機制，目的是要讓整體傳輸能量減少一半左右，並且增加整個系統的傳輸量。最後再以模擬的方式，驗證及量測系統運作之效能。

Ultra-Wide Band (UWB) is an emerging wireless communication technology. It not only enables high speed communication for mobile devices, but also is being expected to be a revolution for the communication of home electric appliance. Since UWB can be applied in a diverse of devices, such as Digital TV, MP3 players, Personal Computers, PDAs, etc, therefore, the Quality-of-Service (QoS) guarantee and bandwidth requirement should be deeply concerned. In this thesis, we first discuss the mechanisms of MAC controller in different wireless network systems. Besides, the requirements of MAC Controller with regard to the special features of UWB technology and the well-suited MAC operating policy and mechanism for the UWB systems are investigated. After that, on the basis of IEEE 802.15.3, we design a UWB MAC protocol that considers some specific UWB features. As a result, from the simulation results, the proposed MAC protocol can save half of the transmission power and improve the system throughput.