Patent ID: 6944428
Filing Date: 2005-09-13
Classification: H04W

Abstract:
1. An image information input/output device for executing reading input or printing output of image information comprising: a radio communication module capable of carrying out communication by varying a send-output power to a plurality of mobile radio terminals located away from the image information input/output device through arbitrary distances respectively, a distance calculation module which calculates a distance of each of the mobile radio terminals in the plurality of mobile radio terminals from a send-output power value of the radio communication module which is carrying out communication with each of the mobile radio terminals of the plurality of mobile radio terminals, a mobile radio terminal control module which manages identification information and user information for identify the mobile radio terminals in at least the plurality of mobile radio terminals, and distance and time calculated by the distance calculation module, an interval timer which allows the radio communication module to periodically carry out communication with the mobile radio terminals in the plurality of mobile radio terminals, and allows the distance calculation module to periodically calculate the distance, and a user judging module which detects that any of a plurality of users approached the image information input/output device based on the distance calculated by the distance calculation module, and which identifies a user who approached the image information input/output device based on identification information which identifies each of the mobile radio terminals of the plurality of mobile radio terminals managed by the mobile radio terminal control module, whenever communication with each of the mobile radio terminals of the plurality of mobile radio terminals is carried out by the radio communication module by the interval timer.