Low power zigbee device and low power wake-up method

1. A low-power ZigBee device provided with a sleeping mode and an active mode, comprising:

a power supplying unit configured for supplying power;

a Medium Access Control (MAC) processing unit configured for receiving a wake-up packet and for controlling a modem unit and an Radio Frequency (RF) unit; and

a Central Processing Unit (CPU) configured for receiving and processing a data packet,

wherein the MAC processing unit is not applied with power during a period the low-power ZigBee device is in the sleep mode and is applied with power in response to an event, the event comprises that a sleep timer is finished or an external signal is detected, the CPU is not applied with power when the MAC processing unit is applied with power in response to the event, and the MAC processing unit is configured to cause the power supplying unit to apply the power to the CPU based on a result of checking an identification (ID) of the wake-up packet.

2. The low-power ZigBee device according to claim 1 , wherein the power supplying unit applies the power to the MAC processing unit in response to the event.

3. The low-power ZigBee device according to claim 2 , wherein the power supplying unit does not apply the power to the CPU when applying the power to the MAC processing unit in response to the event.

4. The low-power ZigBee device according to claim 1 , wherein the MAC processing unit is configured to instruct the power supplying unit to apply the power to the CPU according to the result of checking the ID of the wake-up packet if the ID is consistent with an ID associated with the MAC processing unit and is changed to the sleeping mode if the ID is not the ID associated with the MAC processing unit.

5. The low-power ZigBee device according to claim 1 , wherein the external signal is a Received Signal Strength Indication (RSSI) signal.

6. A low-power wake-up method of a ZigBee device provided with a power supplying unit, a Medium Access Control (MAC) processing unit, and a Central Processing Unit (CPU), the method comprising:

setting a sleeping timer and setting a sleeping mode by cutting-off power of the ZigBee device;

applying a power to the MAC processing unit without applying the power to the CPU if a wake-up event occurs, the wake-up event comprising that the sleep timer is finished or an external signal is detected;

controlling a modem unit and an RF unit by the MAC processing unit and receiving a wake-up packet and checking an identification (ID) of the wake-up packet; and

applying the power to the CPU in case that the ID is consistent with an ID associated with the MAC processing unit according to the ID check result.

7. The low-power wake-up method according to claim 6 , wherein at the step of applying the power to the MAC processing unit, the power supplying unit applies the power to the MAC processing unit and does not apply power to the CPU.

8. The low-power wake-up method according to claim 7 , wherein at the step of applying the power to the CPU, the MAC processing unit makes the power supplying unit apply the power to the CPU based on the result of checking the ID of the wake-up packet.

9. The low-power wake-up method according to claim 8 , wherein the MAC processing unit is changed to the sleeping mode again, according to the result of checking the ID of the wake-up packet, if the ID is not consistent with the ID associated with the MAC processing unit.

10. The low-power wake-up method according to claim 6 , wherein the external signal is a Received Signal Strength Indication (RSSI) signal.