In-band and out-band communication method and device in wireless power transmission system

Patent metadata

Field	Value
Publication number	US-11949254-B2
Application number	US-201917594165-A
Country	US
Kind code	B2
Filing date	Nov 29, 2019
Priority date	Apr 5, 2019
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

The present invention relates to a near field communication method and device in a wireless power transmission system. A wireless power receiving device comprises: a power pick-up circuit configured to receive wireless power from a wireless power transmitting device having a primary coil by magnetic coupling to the wireless power transmitting device at an operating frequency and convert an alternating current signal generated from the wireless power into a direct current signal; a communication circuit configured to perform in-band communication with the wireless power transmitting device by using the operating frequency and perform out-band communication with the wireless power transmitting device or another device by using a frequency other than the operating frequency; and a control circuit configured to control an overall operation of the wireless power receiving device, wherein a first connection parameter for out-band communication between the wireless power transmitting device and the wireless power receiving device can be set equal to a second connection parameter for out-band communication between the wireless power transmitting device and another wireless power receiving device.

First claim

What is claimed is:

1. A wireless power receiver comprising:
a power pickup circuit configured to:
receive a wireless power from a wireless power transmitter by a magnetic coupling with the wireless power transmitter having a primary coil at an operating frequency, and
convert an AC signal generated by the wireless power into a DC signal;
a communication circuit configured to:
perform an in-band communication with the wireless power transmitter using the operating frequency, and
perform an out-band communication with the wireless power transmitter or other device using a frequency other than the operating frequency; and
a control circuit configured to control an overall operation of the wireless power receiver,
wherein the communication circuit in the wireless power receiver includes:
a first out-band communication module configured to perform the out-band communication with the other device using the frequency other than the operating frequency; and
a second out-band communication module configured to perform the out-band communication with the wireless power transmitter using the frequency other than the operating frequency,
wherein, according to the second out-band communication module operating as a scanner, the second out-band communication module shares information about a scan record with the first out-band communication module,
wherein, according to the second out-band communication module operating as a master after the second out-band communication module operating as the scanner connects with the wireless power transmitter, the second out-band communication module shares scheduling information with the first out-band communication module,
wherein the second out-band communication module receives or transmits information related to a wireless charging from or to the wireless power transmitter, and
wherein, according to the second out-band communication module receiving a retransmission request for a packet transmitted by the wireless power receiver from the wireless power transmitter, the second out-band communication module reshares the scheduling information with the first out-band communication module.

2. The wireless power receiver of claim 1 , wherein the scheduling information includes a connection interval and a channel map for an out-band communication.

3. The wireless power receiver of claim 1 , wherein the communication circuit filters a packet based on at least one of a device identifier and a service identifier included in the packet received through the out-band communication.

Assignees

• Lg Electronics Inc

Inventors

• Choi Jingu
• Lim Jinkwon
• Lee Minsoo
• Park Joonho
• Park Yongcheol

Classifications

• H02J50/80 Primary

  involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title

• H02J50/10

  using inductive coupling · CPC title

• H04B1/005

  adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges · CPC title

• H04B5/0037

  Electricity · mapped topic

• H04B5/79 Primary

  for data transfer in combination with power transfer · CPC title