Wireless projection method, apparatus, and system

Patent metadata

Field	Value
Publication number	US-12039901-B2
Application number	US-202318300435-A
Country	US
Kind code	B2
Filing date	Apr 14, 2023
Priority date	Oct 16, 2020
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

Embodiments of the present disclosure relate to the field of communication technologies and disclose a wireless projection method, apparatus, and system. The method includes: A wireless projection apparatus determines, based on a display frame rate used when the wireless projection apparatus displays an image, a duration of a first transmission period. The wireless projection apparatus negotiates with a display apparatus to determine a configuration of a time domain resource in the first transmission period, where the time domain resource in the first transmission period is configured to include a first time segment, a second time segment, and a third time segment, the first time segment is used to send first data to the display apparatus, the second time segment is used to receive second data sent by the display apparatus, and the third time segment is used for sleep.

First claim

What is claimed is:

1. A wireless projection apparatus, comprising:
at least one processor, configured to:
determine, based on a display frame rate used when the wireless projection apparatus displays an image, a duration of a first transmission period; and
determine, by negotiating with a display apparatus, a configuration of a time domain resource in the first transmission period, wherein the time domain resource in the first transmission period is configured to comprise a first time segment, a second time segment, and a third time segment, the first time segment is a time segment in which first data is sent to the display apparatus, the second time segment is a time segment in which second data is received from the display apparatus, and the third time segment is a time segment in which the wireless projection apparatus sleeps; and
a transceiver, configured to perform transmission of wireless projection data with the display apparatus in the first transmission period,
wherein the transceiver is further configured to send third information to the display apparatus, wherein the third information indicates the display apparatus to calibrate time of the display apparatus based on a first time, and the first time is determined by the transceiver based on a local time and a duration for sending the third information.

2. The apparatus according to claim 1 , wherein
the transceiver is further configured to:
send first information to the display apparatus, wherein the first information indicates the duration of the first transmission period and a duration of the first time segment; and
receive second information from the display apparatus in response to the first information, wherein the second information indicates a duration of the second time segment; and
the at least one processor is further configured to: configure, based on the duration of the first time segment and the duration of the second time segment, a remaining time segment in the first transmission period as the third time segment.

3. The apparatus according to claim 1 , wherein in the first transmission period, the first time segment, the second time segment, and the third time segment are sequentially configured.

4. The apparatus according to claim 1 , wherein
the transceiver is further configured to send the third information to the display apparatus in a second transmission period, wherein the second transmission period is a beacon period.

5. The apparatus according to claim 1 , wherein
the transceiver is further configured to receive a first request from the display apparatus, wherein the first request requests to sleep, and the first request is sent by the display apparatus at an end of the second time segment, after last second data is sent, at an end of the first time segment, or after last first data is received; and
the at least one processor is further configured to: after indicating, in response to the first request, the display apparatus to sleep, control the transceiver to sleep.

6. The apparatus according to claim 1 , wherein
the transceiver is further configured to receive a second request from the display apparatus, wherein the second request requests to wake up, and the second request is from the display apparatus after the first transmission period ends; and
the at least one processor is further configured to: in response to the second request, wake up the display apparatus, and control the transceiver to send the first data to the display apparatus.

7. The apparatus according to claim 1 , wherein the duration of the first transmission period meets transmission of the wireless projection data performed by the transceiver based on the display frame rate.

8. The apparatus according to claim 7 , wherein the first transmission period is a reciprocal of the display frame rate.

9. A display apparatus, comprising:
at least one processor, configured to negotiate with a wireless projection apparatus to determine a configuration of a time domain resource in a first transmission period, wherein a duration of the first transmission period is determined by the wireless projection apparatus based on a display frame rate when an image is displayed, the time domain resource in the first transmission period is configured to comprise a first time segment, a second time segment, and a third time segment, the first time segment is a time segment in which first data is received from the wireless projection apparatus, the second time segment is a time segment that is determined by the at least one processor and that is a time segment in which second data is sent to the wireless projection apparatus, and the third time segment is a time segment in which the wireless projection apparatus sleeps;
a transceiver, configured to perform transmission of wireless projection data with the wireless projection apparatus in the first transmission period; and
a display, configured to display the image based on the wireless projection data,
wherein the transceiver is further configured to send third information to the display apparatus, the third information indicates the display apparatus to calibrate time of the display apparatus based on a first time, and the first time is determined by the transceiver based on a local time and a duration for sending the third information.

10. The apparatus according to claim 9 , wherein
the transceiver is further configured to:
receive first information from the wireless projection apparatus, wherein the first information indicates the duration of the first transmission period and a duration of the first time segment; and
send second information to the wireless projection apparatus, wherein the second information indicates a duration of the second time segment; and
the at least one processor is further configured to: configure, based on the duration of the first time segment and the duration of the second time segment, a remaining time segment in the first transmission period as the third time segment.

11. The apparatus according to claim 9 , wherein in the first transmission period, the first time segment, the second time segment, and the third time segment are sequentially configured.

12. The apparatus according to claim 9 , wherein
the transceiver is further configured to receive the third information from the wireless projection apparatus in a second transmission period, wherein the second transmission period is a beacon period.

13. The apparatus according to claim 9 , wherein
the transceiver is further configured to send a first request to the wireless projection apparatus, wherein the first request requests to sleep, and the first request is sent at an end of the second time segment, after last second data is sent, at an end of the first time segment, or after last first data is received; and
the at least one processor is further configured to control, after determining that the wireless projection apparatus receives the first request, the transceiver to sleep.

14. The apparatus according to claim 9 , wherein
the transceiver is further configured to send a second request to the wireless projection apparatus after the first transmission period ends, wherein the second request requests to wake up; and
the at least one processor is further configured to: after determining that the wireless projection apparatus receives the second request, wake up the transceiver and control the transceiver to receive the first data.

15. The apparatus according to claim 9 , wherein the duration of the first transmission period meets display of the image by the display based on the display frame rate.

1

Assignees

• Huawei Tech Co Ltd

Inventors

• Gu Yanjie
• Li Weihua
• Han Yunfeng
• Gao Lin

Classifications

• G09G2370/16

  Use of wireless transmission of display information · CPC title

• G09G2354/00

  Aspects of interface with display user · CPC title

• G09G2330/022

  in absence of operation, e.g. no data being entered during a predetermined time · CPC title

• H04N21/43637

  involving a wireless protocol, e.g. Bluetooth®, RF or wireless LAN [IEEE 802.11] (arrangements for wireless networking or broadcasting of information in indoor or near-field type systems H04B10/114) · CPC title

• H04N21/4436

  Power management, e.g. shutting down unused components of the receiver (power management in computer systems G06F1/3203; hibernate or awake process in computer systems G06F9/4418) · CPC title