Patent ID: 8744447

Claim:
A method for connecting a communication terminal device with a base station by wireless, the method comprising: monitoring the wireless connection between the communication terminal device and the base station; setting a communication session retention time period that is longer than a connection parameter retention time period during which a connection parameter is retained and a reconnecting process is executable, the connection parameter being for connecting the communication terminal device with the base station by wireless, and retaining the connection parameter, which is stored when the wireless connection is disconnected, in at least one of the communication terminal device and the base station for the communication session retention time period over the connection parameter retention time period; acquiring another connection parameter of another base station from the base station connected to the communication terminal device before the disconnection; and after the connection parameter retention time period has elapsed, and while the communication session retention time period has not elapsed, restoring the wireless connection using the connection parameter, which is stored when the wireless connection is disconnected, by executing an initial connecting process using said another connection parameter.