Patent ID: 7571207

Claim:
An information delivery method for delivering prescribed contents to users registered in advance on a network, the network comprising: a first terminal; a second terminal; a presence server that manages presence information of a first user of the first terminal and of a second user of the second terminal; an information delivery server that stores contents to be delivered to the first terminal; the second terminal; a communication network that establishes connection among the first terminal, the presence server, and the information delivery server to enable communication, wherein the information delivery method comprises the steps of: forming a first presentity and a second presentity on the network sensed by the presence server, each of the first and second presentities being an account necessary for the first terminal or the second terminal to enjoy presence service; providing the first presentity and a second presentity respectively with a first identifier and a second identifier for uniquely identifying the presentities; forming at least one other presentity than the first and second presentities, which is an account necessary for the information delivery server to enjoy presence service; providing each of said at least one other presentity with a respective identifier; and transmitting contents data and account information on the second presentity from the second terminal to said at least one other presentity of the information delivery server, wherein the second terminal is associated with said at least one other presentity connected to the communication network, the information delivery server associates the transmitted contents data with the account information on the second presentity and registers the contents data therein, and the information delivery server acquires presence information of the first user from the presence server through said at least one other presentity, and when the acquired presence information of the first user matches delivery conditions of the stored contents, delivers the contents data to the first user, with a delivery source of the contents as said respective identifier of said at least one other presentity.