藍芽網路系統之效能評估與頻寬分配機制

Abstract

隨著最近無線技術的發展，短距離的無線傳輸技術逐漸成為一股新的潮流，而且也提供使用者越來越多方便的服務。其中藍芽技術的出現使得原先單機的裝置可以容易地進入網路環境。隨著最新版的藍芽標準 1.1 版在 2001 年二月制訂後，相關的產品預期將很快地出現在市場上。 在藍芽無線系統裡，藍芽裝置會被組織成 Piconet。而各自獨立的 Piconet 也可以互相連接，進一步形成 Scatternet。Scatternet 中裝置的數目和其所使用頻寬分配機制都是影響效能的重要因素。在本篇論文中，我們提出三種不同的頻寬分配機制，同時評估在藍芽環境中，不同網路拓撲和和使用不同頻寬分配機制的效能，其中效能包括平均傳輸量和封包延遲時間。

With the recent advance in wireless technologies, short-range wireless transmission gradually becomes a new trend, and provides users with more convenient services. One renowned example will be the standardization of Bluetooth specification that provides previously standalone devices the network services. As the latest revision of Bluetooth specification version 1.1 in February of 2001, the compliant products are expected to rapidly fill the market. In Bluetooth wireless systems, Bluetooth devices are organized in piconets. A set of piconets can be grouped and interconnected as a scatternet. As anticipated, both the number of devices in a scatternet and bandwidth allocation schemes will affect the system performance. In this thesis, we will experiment three kinds of bandwidth allocation schemes to evaluate their performances, including throughputs and delays, under different system topologies. Discussions on their pro-and-con will also be provided.