| 摘要 |
PROBLEM TO BE SOLVED: To allow a user to simultaneously use a plurality of presence-adaptable terminals without confusing the other users. SOLUTION: A terminal 100 and a terminal 200 used by a user X have presentities 101, 201 transmitting presence information about the user X to a presence server 400. A presence information reception part 402 of the presence server 400 stores the presence information received from the terminals 100, 200 into entries E1, E2 of a presence information cache 401 corresponding to a client ID added therewith together with a user ID added therewith. A presence information decision part 404 decides unique presence information from the plurality of pieces of presence information about the user X stored in the entries E1, E2 on the basis of predetermined conditions. The presence information transmission part 403 adds the user ID to the decided presence information and transmits the presence information to a terminal 300 of a user Y. COPYRIGHT: (C)2005,JPO&NCIPI
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