METHOD FOR AVOIDING SIGNAL COLLISION IN WIRELESS POWER TRANSFER
First Claim
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1. A wireless power transmitter comprising:
- a power conversion unit configured to form a wireless power signal for power transmission; and
a power transmission control unit configured to control the power conversion unit to receive a first response signal from a first wireless power receiver, the first response signal corresponding to the wireless power signal, and to receive a second response signal from a second wireless power receiver, the second response signal avoiding collision with the first response signal,wherein the second wireless power receiver receives the first response signal, detects a time point when the second response signal avoids collision with the first response signal, and generates the second response signal at the collision-avoided time point.
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Abstract
In a wireless power transmitter, a wireless power receiver, and a signal collision avoiding method disclosed herein, when a new wireless power receiver is placed in a specific area while the wireless power transmitter is performing communication with a specific wireless power receiver, the new wireless power receiver analyzes a response signal formed by the specific wireless power receiver through a listening mode, and transmits its own response signal at a collision-avoided time point, thereby allowing an efficient stable data communication.
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Citations
7 Claims
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1. A wireless power transmitter comprising:
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a power conversion unit configured to form a wireless power signal for power transmission; and a power transmission control unit configured to control the power conversion unit to receive a first response signal from a first wireless power receiver, the first response signal corresponding to the wireless power signal, and to receive a second response signal from a second wireless power receiver, the second response signal avoiding collision with the first response signal, wherein the second wireless power receiver receives the first response signal, detects a time point when the second response signal avoids collision with the first response signal, and generates the second response signal at the collision-avoided time point. - View Dependent Claims (2, 3, 4)
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5. A wireless power receiver comprising:
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a power receiving unit configured to receive a wireless power signal from a wireless power transmitter; a modulation/demodulation unit configured to generate a third response signal by modulating the wireless power signal; and a power reception control unit configured to control the power receiving unit to receive a fourth response signal generated by another wireless power receiver receiving the wireless power signal, detect a time point when the third response signal avoids collision with the fourth response signal, and control the modulation/demodulation unit to generate the fourth response signal at the collision-avoided time point.
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6. A signal collision avoiding method in a wireless power transfer, the method comprising:
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forming a wireless power signal for power transmission; periodically receiving a first response signal from the first wireless power receiver, the first response signal corresponding to the wireless power signal; and receiving a second response signal from a second wireless power receiver, the second response signal avoiding collision with the first response signal, when the second wireless power receiver is placed in a specific area, wherein the second wireless power receiver receives the first response signal, detects a time point when the second response signal avoids collision with the first response signal, and generates the second response signal at the collision-avoided time point. - View Dependent Claims (7)
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Specification