| 摘要 |
<p>A computer may be provided with a wireless communica- tion capability by connecting a communication device to the computer through a cable connection. The communi- cation device may provide the computer with a communi- cation connection to a mobile telecommunication network providing a high-speed packet radio service. When a cable connecting the communication device to the computer is removed, the communication device detects a disconnec- tion between the communication device and the computer. Consequently, the communication device starts a timer upon detection of the disconnection and performs an op- eration to deregister the communication device from the mobile telecommunication network after the lapse of a pre- determined time period counted by the timer. Accordingly, the communication device does not immediately deregis- ter itself from the mobile telecommunication network when it detects the disconnection. Instead, the communication device allows a user to reattach the cable within the pre- determined time period. Thus, unnecessary signaling be- tween the communication device and the mobile telecom- munication network is avoided.</p> |
