Apparatus and method for controlling power transmission coverage of wireless power transmission network

An apparatus of a wireless power transmission network, the apparatus comprising:

• a wireless power transmitter configured to form a wireless power transmission network and to supply wireless power to a plurality of peripheral devices of the wireless power transmission network;
• and
• a controller configured to:
• gradually decrease an amount of transmission power of the wireless power transmitter while receiving periodic feedback from the plurality of peripheral devices;
• determining, by the wireless power transmitter, that a first peripheral device of the plurality of peripheral devices is disconnected from the wireless power transmission network when the periodic feedback is not received from the first peripheral device for a predetermined time;
• and
• control an output power of the wireless power transmitter based, at least in part, on the amount of transmission power when the first peripheral device is disconnected from the wireless power transmission network.

A method performed by a wireless power transmitter for controlling wireless power transmission, comprising:

• forming a wireless power transmission network in which the wireless power transmitter is configured to concurrently supply wireless power to a plurality of peripheral devices via a resonant channel;
• gradually decreasing an amount of transmission power of the wireless power transmitter while supplying the wireless power via the resonant channel;
• determining, by the wireless power transmitter, a first amount of the transmission power that causes a first peripheral device of the plurality of peripheral devices to disconnect from the wireless power transmission network;
• and
• controlling a transmission power setting of the wireless power transmitter based, at least in part, on the first amount of the transmission power determined to cause the first peripheral device to disconnect from the wireless power transmission network.