Patent ID: 7979560

Claim:
A method comprising the steps of: receiving data from a correspondent node (CN) connected to an internet protocol (IP) network, the data to be transmitted to a mobile station by using a push service; storing, temporarily, the received data at a push server; identifying a data location register (“DLR”) based on a terminal ID of the mobile station, if an IP address is not assigned to the mobile station; transmitting a message for requesting to page the mobile station to the DLR using an identifier of the DLR, the identifier being an IP address; receiving an IP address of the mobile station, the IP address of the mobile station allocated in response to the message requesting to page the mobile station; and transmitting the data to the mobile terminal by using the IP address of the mobile station, the IP address corresponding to the terminal ID, wherein the DLR allocates a temporary ID to the mobile terminal when the mobile station is connected to a network, and transmits a message including the terminal ID of the mobile station and the identifier of the DLR to a home DLR (“home DLR”) for registering location information of the mobile station, and wherein the push server, upon request for transmission of push data to the mobile terminal, requests the home DLR for the identifier of the DLR which has allocated the temporary ID to the mobile terminal; wherein the receiving of the data further comprises of receiving the data together with a predetermined subscriber ID allocated to a subscriber of the mobile station, and detecting the terminal ID according to the subscriber ID.