Method and apparatus of awaking a communication device

1. A method of awaking a communication device operating in a sleep mode, comprising:

wireless network interface card coupled to the communication device actively and continuously sending a remote communication device a plurality of coupling packets to maintain coupling between the communication device and the remote communication device;

receiving a wireless packet from the remote communication device;

determining whether the wireless packet is a wake-up packet; and

controlling the communication device to leave the sleep mode when the wireless packet is determined to be the wake-up packet.

2. The method of claim 1 , wherein the plurality of coupling packets are null frame packets.

3. The method of claim 1 , wherein the wake-up packet is a magic packet.

4. The method of claim 1 , wherein the remote communication device is an access point device.

5. The method of claim 1 , wherein controlling the communication device to leave the sleep mode comprises switching a power supply of the communication device from an auxiliary power to a main power.

6. A wireless network interface card of a communication device in a sleep mode, comprising:

a transceiver for actively and continuously transmitting wireless signals corresponding to a plurality of coupling packets to a remote communication device to maintain coupling between the communication device and the remote communication device and receiving a wireless signal corresponding to a wireless packet sent by the remote communication device;

a packet reception unit coupled to the transceiver, for receiving the wireless packet;

a determining unit coupled to the packet reception unit, for determining whether the wireless packet corresponds to a wake-up packet and generating a control signal when the wireless packet is determined to be a wake-up packet; and

a wake-up unit coupled to the determining unit, for controlling the communication device to leave the sleep mode according to the control signal.

7. The wireless network interface card of claim 6 , wherein the plurality of coupling packets are null frame packets.

8. The wireless network interface card of claim 6 , wherein the wake-up packet is a magic packet.

9. The wireless network interface card of claim 6 , wherein the remote communication device is an access point device.

10. A method of awaking a communication device comprising a wireless network interface card, the communication device at least comprising one sleep mode and one non-sleep mode, the method comprising:

in the sleep mode, actively and continuously sending a plurality of coupling packets to a remote communication device by the wireless network interface card;

receiving a wireless packet from the remote communication device;

determining whether the wireless packet corresponds to a packet type of a wake-up packet; and

controlling the communication device to leave the sleep mode when the wireless packet corresponds to the wake-up packet.

11. The method of claim 10 , wherein the plurality of coupling packets are null frame packets.

12. The method of claim 10 , wherein the wake-up packet is a magic packet.

13. The method of claim 10 , wherein the remote communication device is an access point device.

14. The method of claim 10 , wherein the communication device loads at least a driver of the wireless network interface card and switches to an auxiliary power.

15. The method of claim 10 , wherein the non-sleep mode is a normal mode in which the communication device is powered through a main power.

16. The method of claim 10 , wherein a step of controlling the communication device to leave the sleep mode comprises switching a power supply of the communication device from an auxiliary power to a main power.