PRESENCE INFORMATION PROVISION SERVER, PRESENCE INFORMATION PROVISION METHOD AND PRESENCE INFORMATION PROVISION PROGRAM

摘要

PROBLEM TO BE SOLVED: To support origination at more appropriate timing.;SOLUTION: A presence information provision server 100 acquires the presence information of a presentity terminal, and the utilization state of an SIP server for housing the presentity terminal from the SIP server. The identifier of a presentity terminal, and the presence information thus acquired, are associated with the utilization state of an SIP server for housing the presentity terminal and stored in the state data 111. Upon receiving the reference request data of the presence information of a presentity terminal from a watcher terminal, the presence information of a presentity terminal and the utilization state of an SIP server for housing the presentity terminal are acquired from the state data 111, and the response data including the presence information and utilization state is transmitted to the watcher terminal.;COPYRIGHT: (C)2013,JPO&INPIT