| 摘要 |
A presence information notification system is provided which generates presence information indicating where or whether or not a user is present and notifies a terminal of the generated information substantially without requiring the user to perform any intentional operation therefor. The system includes: a portable device carried by the user; an installed device installed at a predetermined position and having a memory device A storing an identifier A for identifying the individual installed device, detection means, for detecting the portable device, and means for performing data communication via a data communication network; a first memory device storing association relationship between positional information indicating the position where the installed device is installed and the identifier A of the installed device installed at the position indicated by the positional information; and a server having means for performing data communication via a data communication network.
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