Method of subscriber authentication for packet data communication in access network of mobile communication system

The present invention relates to a subscriber authentication method, at the time of packet data communication in a mobile communication network, the step of if there is a packet data service connection request from the mobile communication terminal requests a session to a data location register, a data position at the request of the Step 1 third step of registering group is assigned a session and MIN number and the ESN step of transmitting a response message to the radio station including information, traffic channel for the mobile communication terminal stations after step 2 of the mobile communication terminal and stations of the mobile communication terminal step 4 to request and receive hardware ID information, the fifth step of determining whether the hardware ID information received by the ESN and the step 4, the same in the step 2, if it is determined that the same ESN and hardware ID information in step 5, and completes the subscriber identity by performing the step 6 to provide a packet data service to the mobile communication terminal, the packet data And with respect to the mobile communication terminal using the service compares the information received by the request information and the terminal that is stored in the Access Network to verify whether or not the same, and provides an effect to be capable of performing an accurate accounting therethrough.