這幾年來無線通訊快速發展，讓無線區域網路應用層面越來越廣，原來主要應用範圍只是在家中或企業內部，由於802.11n或802.11ac資料傳輸率遠高於無線通訊3G 的1Mbps 或LTE的 300Mbps 以及建置費用也比3G與LTE低，因此逐漸有將無線區域網路應用在公共場合，例如:咖啡廳、飯店或機場等等，儘管目前802.11ac的標準的修訂工作仍在進行中，在標準裡的產品也已經在市場上可以購買到，但是，目前評估這些802.11ac設備傳輸效能都只完全集中在模擬器上面。 所以主要目標是研究最大的吞吐量(Throughput)是否可以在現實真正被實現，而這對於提昇WLAN產品的效能非常重要。因此，在本篇論文中，我們將在Ad-hoc mode的架構下，利用電波隔離室及實際的傳輸距離和各種傳輸速率所表現出來的實際吞吐量作統計，並作進一步的效能分析。另外, 我們也在Infrastructure mode架構下，對無線基地台(Access Point)與Router分別在實際環境下802.11n、802.11ac、混合模式及AP+Bridge mode下的環境作測試並找出最為穩定及突出表現的組合。 ;In recent years, the rapid development of wireless communication technology has extended the range of the application of wireless local area network (WLAN). Before this, WLAN applications were mainly in households and enterprises. Then, WLAN applications started to be used in public spaces, such as in cafes, hotels and airports, because of two reasons. First, the bandwidths of WLANs that use 802.11n or 802.11ac are significantly wider than that of a third generation (3G) wireless communication network, and that of an Long-Term Evolution network (LTE). Second, the cost for implementing a WLAN is lower than that of implementing a 3G network or an LTE network. While the 802.11ac standard is currently undergoing revisions, products that adopt the standard are already available in the market. Nevertheless, current performance assessments of 802.11ac devices have all been conducted by using simulators. Because of this, the aim of this research is to answer whether or not the maximum theoretical throughputs of 802.11n and 802.11ac can be achieved in reality. The answer is expected to contribute to efforts to improve the performance of WLAN products. This research measured the actual throughputs of 802.11n and 802.11ac WLANs in ad-hoc mode by setting up the same types of WLANs in RF-shielded rooms and at different locations, and then measuring the transmit rates of the tested WLANs. The measured data were used for performance analysis. This research also tested the performances of access points (AP) and routers within 802.11n and 802.11ac WLANs in infrastructure mode, as well as how they performed while being set to a hybrid mode and an AP+Bridge mode. The test results were used to find out which network setting has the most excellent and stable performance.
