| 摘要 |
PROBLEM TO BE SOLVED: To make relatives and acquaintances etc. check a user's safety easily in an emergency, without needing a special operation. SOLUTION: A call history collection server 31 stores information concerning a call history between a calling party and called parties. If a call between the calling party and a called party called by the calling party is not established, an information providing server 33 determines whether an information concerning the called party is transmitted to the calling party or not, on the basis of the stored call history. If it is determined that the information should be transmitted, the information providing server 33 transmits the information. COPYRIGHT: (C)2006,JPO&NCIPI
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