Patent ID: 7796548
Filing Date: 2010-09-14
Classification: G04R,H04W

Abstract:
1. A method of synchronizing time in an asynchronous scheme mobile station, the method comprising the steps of: receiving location area identification (LAI) information in a current location area of the mobile station according to movement of the mobile station; determining whether the mobile station is located in an area having a time difference based on the LAI information; performing packet data protocol (PDP) context activation with a time server providing standard time information of the current location area of the mobile station by accessing the time server when the mobile station is located in the area having the time difference; requesting to the time server a time synchronization through Simple Network Time Protocol (SNTP) packet communication after the PDP context activation is performed; obtaining standard time information from the time server through the SNTP packet communication in response to the request; and performing the time synchronization with the obtained standard time information.