Direct current (DC) bias and alternating current (AC) power selection signaling for optical wireless communications

Patent metadata

Field	Value
Publication number	US-12255683-B2
Application number	US-202318181446-A
Country	US
Kind code	B2
Filing date	Mar 9, 2023
Priority date	Mar 9, 2023
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

Abstract

In an aspect, an OWC transmitter transmits, to an OWC receiver, a first DC bias parameter, receives, from the OWC receiver, DC bias feedback based on a measurement associated with an OWC link between the OWC transmitter and the OWC receiver, and transmits an OWC signal with a second DC bias parameter that is based on the DC bias feedback from the OWC receiver. In another aspect, an OWC receiver receives, from an OWC transmitter, a first DC bias parameter, transmits DC bias feedback based on a measurement associated with an OWC link between the OWC transmitter and the OWC receiver, and receives, from the OWC transmitter, an OWC signal having a second DC bias parameter based on the DC bias feedback.

First claim

What is claimed is:

1. An apparatus for wireless communication at an optical wireless communications (OWC) transmitter, comprising:
memory; and
at least one processor coupled to the memory and, based at least in part on information stored in the memory, the at least one processor is configured to:
transmit, to an OWC receiver, a first direct current (DC) bias parameter;
receive, from the OWC receiver, DC bias feedback based on a measurement associated with an OWC link between the OWC transmitter and the OWC receiver; and
transmit an OWC signal with a second DC bias parameter that is based on the DC bias feedback from the OWC receiver.

2. The apparatus of claim 1 , wherein the first DC bias parameter comprises at least one of a DC bias value or a range of DC bias values.

3. The apparatus of claim 1 , wherein the at least one processor is further configured to:
indicate the first DC bias parameter to the OWC receiver via level 3 signaling.

4. The apparatus of claim 1 , wherein the DC bias feedback from the OWC receiver is comprised in one of level 1 signaling or level 2 signaling.

5. The apparatus of claim 1 , wherein the DC bias feedback from the OWC receiver includes an acknowledgement of reception of the first DC bias parameter.

6. The apparatus of claim 1 , wherein the DC bias feedback from the OWC receiver comprises at least one of a DC bias value or a range of DC bias values.

7. The apparatus of claim 1 , wherein the at least one processor is further configured to:
transmit alternating current (AC) power information comprising a first AC power parameter to the OWC receiver.

8. The apparatus of claim 7 , wherein the AC power information is comprised in level 3 signaling.

9. The apparatus of claim 7 , wherein the at least one processor is further configured to:
receive, from the OWC receiver, AC power feedback; and
transmit the OWC signal to the OWC receiver with a second AC parameter based on the AC power feedback from the OWC receiver.

10. The apparatus of claim 9 , wherein the AC power feedback is comprised in one of level 2 signaling or level 3 signaling.

11. The apparatus of claim 1 , wherein the OWC transmitter is a network node and the OWC receiver is a user equipment (UE).

12. The apparatus of claim 1 , wherein the OWC transmitter is a UE and the OWC receiver is a network node.

13. The apparatus of claim 1 , wherein the OWC transmitter is a first UE and the OWC receiver is a second UE.

14. An apparatus of wireless communication at an optical wireless communications (OWC) receiver, comprising:
memory; and
at least one processor coupled to the memory and, based at least in part on information stored in the memory, the at least one processor is configured to:
receive, from an OWC transmitter, a first direct current (DC) bias parameter;
transmit DC bias feedback based on a measurement associated with an OWC link between the OWC transmitter and the OWC receiver; and
receive, from the OWC transmitter, an OWC signal having a second DC bias parameter based on the DC bias feedback.

15. The apparatus of claim 14 , wherein the first DC bias parameter comprises at least one of a DC bias value or a range of DC bias values.

16. The apparatus of claim 14 , wherein to receive, from the OWC transmitter, the first direct current (DC) bias parameter, the at least one processor is configured to:
receive the first DC bias parameter via level 3 signaling.

17. The apparatus of claim 14 , wherein the at least one processor is further configured to:
indicate the DC bias feedback to the OWC transmitter via one of level 1 signaling or level 2 signaling.

18. The apparatus of claim 14 , wherein the DC bias feedback includes an acknowledgement of reception of the first DC bias parameter.

19. The apparatus of claim 14 , wherein the DC bias feedback comprises at least one of a DC bias value or a range of DC bias values.

20. The apparatus of claim 14 , wherein the at least one processor is further configured to:
receive, from the OWC transmitter, alternating current (AC) power information comprising a first AC power parameter.

21. The apparatus of claim 20 , wherein the AC power information is comprised in level 3 signaling.

22. The apparatus of claim 20 , wherein the at least one processor is further configured to:
transmit, to the OWC transmitter, AC power feedback; and
receive the OWC signal from the OWC transmitter with a second AC parameter based on the AC power feedback.

23. The apparatus of claim 22 , wherein the AC power feedback is transmitted via one of level 2 signaling or level 3 signaling.

24. The apparatus of claim 14 , wherein the OWC transmitter is a network node and the OWC receiver is a user equipment (UE).

25. The apparatus of claim 14 , wherein the OWC transmitter is a UE and the OWC receiver is a network node.

26. The apparatus of claim 14 , wherein the OWC transmitter is a first UE and the OWC receiver is a second UE.

27. A method of wireless communication at an optical wireless communications (OWC) transmitter, comprising:
transmitting, to an OWC receiver, a first direct current (DC) bias parameter;
receiving, from the OWC receiver, DC bias feedback based on a measurement associated with an OWC link between the OWC transmitter and the OWC receiver; and
transmitting an OWC signal with a second DC bias parameter that is based on the DC bias feedback from the OWC receiver.

28. The method of claim 27 , further comprising:
transmitting alternating current (AC) power information comprising a first AC power parameter to the OWC receiver.

29. A method of wireless communication at an optical wireless communications (OWC) receiver, comprising:
receiving, from an OWC transmitter, a first direct current (DC) bias parameter;
transmitting DC bias feedback based on a measurement associated with an OWC link between the OWC transmitter and the OWC receiver; and
receiving, from the OWC transmitter, an OWC signal having a second DC bias parameter based on the DC bias feedback.

30. The method of claim 29 , further comprising:
receiving, from the OWC transmitter, alternating current (AC) power information comprising a first AC power parameter.

Assignees

• Qualcomm Inc

Inventors

• Soltani Morteza
• Xue Yisheng
• Sun Jing
• Zhang Xiaoxia
• Becze Karoly

Classifications

• H04B10/80

  Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water · CPC title

• H04W52/08 Primary

  Closed loop power control · CPC title

• H04B10/116

  Visible light communication · CPC title

• H04B10/11 Primary

  Arrangements specific to free-space transmission, i.e. transmission through air or vacuum · CPC title