Docking station for power management

A docking station for power management adapted to be electrically connected to a host, wherein the host comprises a host controller, and the docking station comprises:

• an integrated circuit;
• a first signal input/output (I/O) port electrically connected to the integrated circuit and providing a connection to the host controller, so that a signal is transmitted between the host controller and the integrated circuit through the first signal I/O port;
• a plurality of second signal I/O ports electrically connected to the integrated circuit;
• a network interface controller electrically connected to the integrated circuit, configured to provide a connection to an external network, and having at least one function pin;
• and
• a first controller electrically connected to the function pin and the first signal I/O port, wherein a transmission channel is established between the first controller and the host through the first signal I/O port;
• wherein
• when the host initiates a sleep mode or a standby mode, the network interface controller is disconnected, or there is no network packet transmission, the integrated circuit cuts off a signal connection between the integrated circuit and the first signal I/O port, so that the host controller enters a deepest sleep state, and when the network interface controller receives a wake-on-LAN signal from the external network, the network interface controller informs the first controller through the function pin, the first controller generates a sideband signal, and transmits the sideband signal to the host controller through the transmission channel to wake up the host controller, and the network interface controller controls, in response to the wake-on-LAN signal, the integrated circuit to re-establish the signal connection with the first signal I/O port.