Patent ID: 7627676

Claim:
A communication control method for a data terminal which includes data communication module for transmitting data to or receiving data from another data terminal connected with the data terminal through a communication line, the method comprising: detecting an interruption of the communication line; and when it is detected that the communication line is interrupted, reestablishing the communication line without informing the data communication module of the interruption of the communication line, wherein a wireless communication station forms a wireless zone, wherein the data terminal detects whether it is in the wireless zone, wherein the detecting step detects the interruption of the communication line based on receiving quality of the communication line at the data terminal, the receiving quality being determined based on whether the data terminal detects that it is in the wireless zone, and wherein the reestablishment step comprises watching for the receiving quality for at least a predetermined watching time to determine whether the data terminal detects that it is in the wireless zone, and reestablishes reestablishing the communication line to the data terminal based on information determined for reestablishment of the communication line if the data terminal detects that it is in the wireless zone within the predetermined watching time.