| 摘要 |
A dongle 4 is attached to a USB port 8 of computer 2 through USB connector 6 . The dongle in suspend mode wakes periodically, sends a polling signal, and if it receives a response the dongle enters an active mode. In embodiments, the dongle 4 uses an active scan request as the polling signal and receives a beacon frame as a response. When the dongle enters an active mode after receiving a response the dongle then wakes the computer 2 from its suspend mode. The dongle draws minimal current meeting the USB specifications.
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