US 12,113,372 B2
Communication method and apparatus, power transmitting device, and power receiving device
Yang Liu, Beijing (CN)
Assigned to Beijing Xiaomi Mobile Software Co., Ltd., Beijing (CN)
Appl. No. 17/261,451
Filed by Beijing Xiaomi Mobile Software Co., Ltd., Beijing (CN)
PCT Filed Jul. 20, 2018, PCT No. PCT/CN2018/096516
§ 371(c)(1), (2) Date Jan. 19, 2021,
PCT Pub. No. WO2020/014982, PCT Pub. Date Jan. 23, 2020.
Prior Publication US 2021/0242726 A1, Aug. 5, 2021
Int. Cl. H02J 50/80 (2016.01); H02J 50/10 (2016.01); H04W 4/06 (2009.01); H04W 52/00 (2009.01)
CPC H02J 50/80 (2016.02) [H02J 50/10 (2016.02); H04W 4/06 (2013.01); H04W 52/00 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A communication method, applied to a power transmitter (PTX) supporting multiple coils, and comprising:
transmitting a broadcast signal in response to detecting a load change of the PTX, wherein the broadcast signal carries a communication mode supported by the PTX and a current load state of the PTX, wherein the current load state indicates whether there is load currently accessing the PTX, and varies along with the load change;
charging a first power receiver (PRX) after a handshake communication with the first PRX;
receiving a communication state reported by the first PRX according to the broadcast signal; and
communicating with the first PRX according to the communication state;
wherein the method further comprises:
charging a second PRX before the transmitting the broadcast signal in response to detecting the load change of the PTX;
retransmitting a broadcast signal in response to detecting that the second PRX has been removed;
receiving a communication request transmitted by the first PRX according to the retransmitted broadcast signal, wherein the communication request is configured to request the PTX returning to an in-band enhanced communication state; and
performing an in-band enhanced communication with the first PRX according to the communication request.