Patent ID: 8090350

Claim:
A resynchronization method for a mobile communication terminal connected to a home location register and a mobile communication network, the mobile communication terminal maintaining a terminal serial number and terminal synchronization failure information, the home location register maintaining communication network synchronization failure information that is of an equal value to the terminal synchronization failure information when the mobile communication terminal and the home location register are in synchronization, the method comprising: extracting a communication network serial number corresponding to a terminal authentication request instruction received from the mobile communication network; comparing the communication network serial number with the terminal serial number; updating the terminal synchronization failure information by increasing a value thereof, when the communication network serial number is not larger than the terminal serial number; transmitting the updated terminal synchronization failure information to the home location register; and ending a resynchronization procedure in the home location register when the updated terminal synchronization failure information is not larger than the communication network synchronization failure information.