Patent ID: 7522882
Filing Date: 2009-04-21
Classification: H04W,Y02D

Abstract:
1. A presence update system for transmitting up-to-date presence information indicating the location or the condition of a user of a mobile communication terminal, to a presence management apparatus, the system comprising: a non-contact communication apparatus configured to transmit information indicating at least an installation place; and the mobile communication terminal comprising: a registration element with which information indicating the location of the user or the condition of the user at the location is registered in advance; a receiving element for receiving information from the non-contact communication apparatus; and a transmission element for generating the presence information based on information in the registration element corresponding to the installation place in the received information and transmitting the presence information to the presence management apparatus, wherein information indicating communication permission/refusal at the installation place is also registered with the registration element, and the transmission element is adapted to generate and transmit the presence information with the information indicating communication permission/refusal included therein; wherein information about an expiration period is added to the information from the non-contact communication apparatus; and the mobile communication terminal further comprises means for holding the information with the expiration period information added thereto, and is adapted to, if the information from the non-contact communication apparatus is identical to held information, refer to the expiration period and perform a control to discard the identical information.