近年來，隨著用戶網路信息量急劇增加，網路頻寬資源的需求是與日俱增，因應著此趨勢，行動寬頻技術的發展也是日新月異，次世代行動通訊技術的成熟，讓使用者可以享受到更快網路傳輸速率以及更好的服務品質保證，然而移動通信商和服務提供商所提供行動寬頻之服務覆蓋率仍有所不足，許多用戶仍使用著舊有的行動通訊技術，因此讓使用者知道自身所使用之網路服務品質將會成為一個很重要的議題。
Android、iPhone和Windows mobile為現今主流之智慧型手機平台，然基於Android為開放式之手機平台系統，因此本論文所提出之混合主動和被動之頻寬量測技術研究即針對Android平台進行開發，透過點對點之主動量測取得網路傳輸之上行/下載速度，以及被動量測監控網路背景流量與Android系統狀態，進而呈現當前之網路環境。
在本論文以Android系統為開發平台，使用3.5G與WiFi兩種無線存取技術，根據Android Developers之規範，混合主動量測技術與被動量測技術，進行頻寬量測系統之開發，並結合現有之Speedtest.net量測平台，去分析網路延遲時間、上傳速度和下載速度，再加上網路背景流量與Android系統狀態之監控，提升使用者對於目前網路環境品質訊息之判斷。本實驗系統結果顯示，本論文所提出之混合主動和被動之頻寬量測技術研究，可以提供比TTC網路測速、Speedtest.net和台大測速更完整之量測功能，透過此研究所設計之頻寬量測，可以更清楚的反應出網路服務品質。

Along with tremendous increase of network users, the demand for network bandwidth has growth exponentially in recent years. Coexistent with that trend, mobile broadband technologies have been developed rapidly to support next generation mobile communication network advancements. It will allow the users to enjoy faster network transmission with higher data rate and better quality of service. However since the service availabilities of mobile broadband connection to internet service providers are still insufficient, many users are relies on old mobile communication technology. Therefore based on this fact, it is important for allowing the users to recognize the quality of their mobile network connection.

Addressing that issue, this study develops a wireless networks quality measurement system based on Android platform. It covers two wireless access technologies 3.5G and WiFi, which used commonly in mobile phone network connectivity. Active and passive measurement approaches are combined in order to analyze network latency and download-upload speed. The system is also equipped by network background traffic monitor and the status of Android system. Finally with this proposed measurement methods, the system can show more QoS parameters data in aiming the users to recognize network connection quality. The proposed method is compared with TTC speed test, Speedtest.net and NTU Network Speed Test, and through qualitative analysis results, the proposed measurement method can provide better measurement functionalities.

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