KR-102961187-B1 - Out-of-band communication and setup method and device for out-of-band communication in a wireless power transmission system

Abstract

The present disclosure provides a method for transmitting wireless power performed by a wireless power transmitter in a wireless power transmission system, wherein in a setting phase, a setting packet is received from the wireless power receiver, the setting packet associated with the wireless power receiver includes information regarding whether a function for out-of-band communication is supported, and in a negotiation phase, a specific packet associated with the out-of-band communication is transmitted or received, the specific packet includes information indicating an operation performed in the out-of-band communication, and an apparatus utilizing the same.

Inventors

• 윤진호

Assignees

• 엘지전자 주식회사

Dates

Publication Date

20260507

Application Date

20221108

Priority Date

20211108

Claims (20)

1. In a method for transmitting wireless power performed by a wireless power transmitter in a wireless power transmission system, In the configuration phase, receive a configuration packet from the wireless power receiver, The configuration packet associated with the above wireless power receiver includes information regarding whether a function for out-of-band communication is supported; and In the negotiation phase, transmit or receive specific packets related to the above out-of-band communication, A method characterized by including information indicating an operation performed in the out-of-band communication.
2. A method according to claim 1, wherein the specific packet includes information indicating whether a calibration operation is performed in the out-of-band communication.
3. A method according to claim 1, wherein the specific packet includes information indicating whether an authentication operation is performed in the out-of-band communication.
4. A method according to claim 1, characterized in that the specific packet includes information related to a specific time for a timeout of the out-of-band communication.
5. A method according to claim 4, characterized in that the connection of the out-of-band communication is performed within the specified time from the initiation of the out-of-band communication.
6. A method according to claim 5, characterized in that the specific time is 60 seconds.
7. In paragraph 1, after the setting phase, the wireless power transmitter receives a GRQ (General Request) packet from the wireless power receiver in the negotiation phase, and A method characterized in that, after receiving the GRQ packet, the wireless power transmitter transmits the specific packet to the wireless power receiver during the negotiation phase.
8. In paragraph 1, after the setting phase, the wireless power transmitter receives the specific packet from the wireless power receiver in the negotiation phase, and A method characterized in that, after the wireless power transmitter receives the specific packet, the wireless power transmitter transmits an ACK for the specific packet to the wireless power receiver during the negotiation phase.
9. A method according to claim 8, characterized in that the specific packet is a Specific Request (SRQ) packet.
10. Wireless power transmitters, A converter related to delivering wireless power to a wireless power receiver; It includes a communication/controller related to controlling the transmission of the above wireless power, The above wireless power transmitter is: In the setting phase, receive a setting packet from the wireless power receiver, The configuration packet associated with the above wireless power receiver includes information regarding whether a function for out-of-band communication is supported; and In the negotiation phase, transmit or receive specific packets related to the above out-of-band communication, A method characterized by including information indicating an operation performed in the out-of-band communication.
11. A method for receiving wireless power performed by a wireless power receiver in a wireless power transmission system, In the configuration phase, transmit a configuration packet to the wireless power transmitter, The configuration packet associated with the above wireless power receiver includes information regarding whether a function for out-of-band communication is supported; and In the negotiation phase, transmit or receive specific packets related to the above out-of-band communication, A method characterized by including information indicating an operation performed in the out-of-band communication.
12. A method according to claim 11, wherein the specific packet includes information indicating whether a calibration operation is performed in the out-of-band communication.
13. A method according to claim 11, characterized in that the specific packet includes information indicating whether an authentication operation is performed in the out-of-band communication.
14. A method according to claim 11, characterized in that the specific packet includes information related to a specific time for a timeout of the out-of-band communication.
15. A method according to claim 14, characterized in that the connection of the out-of-band communication is performed within the specified time from the initiation of the out-of-band communication.
16. A method according to claim 15, characterized in that the specific time is 60 seconds.
17. In paragraph 11, after the above-mentioned setup phase, the wireless power receiver transmits a GRQ (General Request) packet to the wireless power transmitter in the above-mentioned negotiation phase, and A method characterized in that, after transmitting the GRQ packet, the wireless power receiver receives the specific packet from the wireless power transmitter during the negotiation phase.
18. In paragraph 11, after the setting phase, the wireless power receiver transmits the specific packet to the wireless power transmitter in the negotiation phase, and A method characterized in that, after the wireless power receiver transmits the specific packet, the wireless power receiver receives an ACK for the specific packet from the wireless power transmitter during the negotiation phase.
19. A method according to claim 18, characterized in that the specific packet is a Specific Request (SRQ) packet.
20. A wireless power receiver is, A power pickup related to receiving wireless power from a wireless power transmitter; and It includes a communication/controller related to controlling the reception of the above wireless power, The above wireless power receiver is: In the configuration phase, a configuration packet is transmitted to the wireless power transmitter, The configuration packet associated with the above wireless power receiver includes information regarding whether a function for out-of-band communication is supported; and In the negotiation phase, transmit or receive specific packets related to the above out-of-band communication, A wireless power receiver characterized by including information indicating an operation performed in the above-mentioned specific packet.

Description

Out-of-band communication and setup method and device for out-of-band communication in a wireless power transmission system This specification relates to wireless power transmission. Wireless power transmission technology is a technology that transmits power wirelessly between a power source and an electronic device. For example, wireless power transmission technology enables the battery of a wireless terminal, such as a smartphone or tablet, to be charged simply by placing it on a wireless charging pad, thereby providing superior mobility, convenience, and safety compared to the existing wired charging environment using wired charging connectors. In addition to wireless charging of wireless terminals, wireless power transmission technology is attracting attention as a potential replacement for the existing wired power transmission environment in various fields, including electric vehicles, various wearable devices such as Bluetooth earphones and 3D glasses, home appliances, furniture, underground facilities, buildings, medical devices, robots, and leisure. Wireless power transmission methods are also referred to as contactless power transmission methods, no point of contact power transmission methods, or wireless charging methods. A wireless power transmission system may be composed of a wireless power transmission device that supplies electrical energy via a wireless power transmission method, and a wireless power receiving device that receives electrical energy supplied wirelessly from the wireless power transmission device and supplies power to a receiving device such as a battery cell. Wireless power transmission technologies are diverse, including methods that transmit power via magnetic coupling, radio frequency (RF), microwaves, and ultrasound. Methods based on magnetic coupling are further classified into magnetic induction and magnetic resonance. Magnetic induction is a method of transmitting energy by utilizing the current induced in the receiving coil due to the magnetic field generated by the battery cell of the transmitting coil, resulting from the electromagnetic coupling between the transmitting coil and the receiving coil. Magnetic resonance is similar to magnetic induction in that it utilizes a magnetic field. However, magnetic resonance differs from magnetic induction in that energy is transmitted through the phenomenon where a magnetic field is concentrated at both ends of the transmitting and receiving coils when resonance occurs when a specific resonant frequency is applied to the transmitting and receiving coils. Meanwhile, the present specification aims to provide a configuration for out-of-band settings between a wireless power transmitter and a wireless power receiver. FIG. 1 is a block diagram of a wireless power system (10) according to one embodiment. FIG. 2 is a block diagram of a wireless power system (10) according to another embodiment. Figure 3 shows examples of various electronic devices in which a wireless power transmission system is introduced. FIG. 4 is a block diagram of a wireless power transmission system according to one embodiment. FIG. 5 is a figure showing an example of a Bluetooth communication architecture to which an embodiment according to the present specification can be applied. FIG. 6 is a block diagram illustrating a wireless power transmission system using BLE communication according to an example. FIG. 7 is a block diagram illustrating a wireless power transmission system using BLE communication according to another example. Figure 8 is a state transition diagram to explain the wireless power transmission procedure. FIG. 9 schematically illustrates an example of a protocol for a ping phase (810). FIG. 10 schematically illustrates an example of a protocol for a configuration phase (820). FIG. 11 is a diagram illustrating the message field of a configuration packet (CFG) of a wireless power receiving device according to one embodiment. FIG. 12 is a flowchart schematically illustrating a protocol for a negotiation phase or a renegotiation phase according to one embodiment. FIG. 13 is a diagram illustrating the message field of a performance packet (CAP) of a wireless power transmission device according to one embodiment. FIG. 14 schematically illustrates a flowchart of the data flow for the power transfer phase (840) in the baseline protocol. FIG. 15 schematically illustrates a flowchart of the data flow for the power transfer phase (840) in the extended protocol. FIG. 16 illustrates an application-level data stream between a wireless power transmitter (100) and a wireless power receiver (200) according to an example. FIG. 17 illustrates a power control method according to one embodiment. Figure 18 schematically illustrates the structure of an MPP ID packet. Figure 19 schematically illustrates an example of an XID packet in MPP. Figure 20 schematically illustrates the protocol in MPP limited mode. Figures 21 and 22 schematically illustrate the protocol in