一個NFC校園導航系統

A NFC-based In-campus Navigation System

全球定位系統（Global Positioning System，GPS）通常運用在室外的環境，來導航使用者。然而，當使用者位於室內環境，而周遭又是高樓林立的區域時，衛星訊號將會消失而導致系統無法運作。為了達成普及的導航需求，我們探索一個室內導航的解決方案。我們在校園建築物內部署一些以位置為基礎的 NFC 標籤，沿路的環境情況和房間資訊都會顯示在配備著 NFC 的 Android 裝置螢幕上，系統也能夠去計算使用者所偏好的最佳化路徑。最後我們也評估了系統的限制和描繪未來的研究方向。

Global positioning system (GPS) usually guides the user to navigate in an outdoor environment. However， it might not work indoors， in built-up areas with a high density of tall buildings， due to lost signals of GPS satellites. To fulfill the requirement of ubiquitous navigation objective， a solution to indoor navigation is explored. We deploy some location-based NFC tags in an in-campus building. Environmental conditions and room information along their route are displayed on the screen in an Android NFC capable device. The system also provides capability for the users to compute optimized routes based on their preference. Finally， we evaluate the restrictions of the system， and delineate further work.