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 packet from a first wireless power receiver and a second packet from a second wireless power receiver in the same time slot,detect a collision between the first packet and the second packet, andcontrol the power conversion unit to receive at least one of the first packet from the first wireless power receiver and the second packet from the second wireless power receiver in at least one time slot other than the same time slot if the collision is detected at the same time slot.
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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.
34 Citations
12 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 packet from a first wireless power receiver and a second packet from a second wireless power receiver in the same time slot, detect a collision between the first packet and the second packet, and control the power conversion unit to receive at least one of the first packet from the first wireless power receiver and the second packet from the second wireless power receiver in at least one time slot other than the same time slot if the collision is detected at the same time slot. - View Dependent Claims (2, 3, 4, 11)
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5. A first wireless power receiver, comprising:
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a power receiving unit configured to receive a wireless power signal from a wireless power transmitter; and a power reception control unit configured to; control the power receiving unit to send a first packet to the wireless power transmitter in the same time slot in which a second wireless power receiver sends a second packet, and control the power receiving unit to resend the first packet to the wireless power transmitter in at least one time slot other than the same time slot if a collision between the first packet from the first wireless power receiver and a second packet from the second wireless power receiver is detected at the same time slot at the wireless power transmitter. - View Dependent Claims (9, 10, 12)
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6. A signal collision avoiding method performed by a wireless power transmitter, the method comprising:
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receiving a first packet from a first wireless power receiver and a second packet from a second wireless power receiver in the same time slot; detecting a collision between the first packet and the second packet; and receiving at least one of the first packet from the first wireless power receiver and the second packet from the second wireless power receiver in at least one time slot other than the same time slot if the collision is detected at the same time slot. - View Dependent Claims (7, 8)
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Specification