I. INTRODUCTION
Since people always carry mobile device with him/her, such applications as recommends appropriate route to destination are especially convenient. Such applications are widely used and they have diverse types from just providing routes to destinations [1] to giving timely notification about location the user should get off [2] and they have been widely used. In any applications, sensors embedded in mobile device are intensively used for the above TPO-conscious services. These sensor data is called lifelog, and there are many related studies such as collecting lifelog efficiently, predicting behavior of user utilizing lifelog[3] [4] [5].