| 摘要 |
<p>A presence service system (100) includes at least two presence servers (41, 42, 43), at least two presence databases (51, 52, 53) storing therein presence information of users, each of the presence databases (51, 52, 53) being associated with any one of the presence servers (41, 42, 43), and an assignment presence server (20) which, when a request relating to presence service is transmitted to the presence service system (100) from a user terminal (71, 72), carries out an assignment process in which the request is transmitted to one of the presence servers (41, 42, 43) covering a user designated in the request.</p> |
