Patent attributes
A wireless power transmitter is provided that includes a power conversion unit configured to form a wireless power signal for power transmission, and a power transmission control unit. The power transmission control unit is 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 if the collision is detected at the same time slot.