Patent ID: 8279845

Claim:
A system for realizing the reception of an incoming call number by a terminal, comprising a Code Division Multiple Access (CDMA) network and a High Rate Packet Data (HRPD) service network which provide service support for the terminal, respectively; wherein a Mobile service Switching Center (MSC) in the CDMA network connects with an access network in the HRPD network via an interface A 1 ; when a calling terminal in the CDMA network initiates a paging to a called terminal in the HRPD network: the MSC in the CDMA network transmits the incoming call number of the paging to the access network of the HRPD network via the interface A 1 ; the access network forwards the incoming call number of the paging to the called terminal; and the called user determines whether to accept the incoming call based on the received incoming call number, if yes, switch to the CDMA network and receive the paging, if not, end the paging procedure; wherein current location area information of terminals of the HRPD network is stored in the MSC of the CDMA network; wherein before the MSC in the CDMA network transmitting the incoming call number of the paging to the access network of the HRPD network via the interface A 1 : after receiving a paging request, the MSC determines the current location of the called terminal based on the stored location area information of the terminal; and wherein after the called terminal receives the incoming call number: the called terminal returns to the access network a response indicating a successful receiving; the access network forwards the response indicating the successful receiving to the MSC via the interface A 1 ; and the MSC sends a ring back tone to the calling terminal after receiving the response indicating the successful receiving.