Numen: Where and what are you doing now?

In this paper, we investigate a novel technique to acquire comprehensive context information of remote Smartphone users, including surrounding environment, location and behaviors, for further information process, e.g. localization and human safeguard. Our system is simply launched by a normal 3G video call and to transmit the captured real time video in 3G connections. The technique makes use of the efficiency of 3G video call and thus zero-configuration for the call initiator. It can achieve the remote user's status on-demand and fast show a general view of the user for the call initiator, besides location based service. Moreover, no costly special devices other than normal 3G Smartphones are needed in our technique. It can also help to revise the inherent limitations of GPS by employing the surrounding environment information provided by captured real time video when lies indoor or dense high building districts. © 2010 IEEE.