Method and apparatus for reducing a peak to average power ratio in the transmission of physical layer protocol data units

Patent metadata

Field	Value
Publication number	US-12244444-B2
Application number	US-202318324714-A
Country	US
Kind code	B2
Filing date	May 26, 2023
Priority date	Dec 31, 2020
Publication date	Mar 4, 2025
Grant date	Mar 4, 2025

Abstract

This application relates to the field of communications technologies, in particular Wireless Local Area Network technologies, and provides a method and apparatus for reducing a peak to average power ratio (PAPR) for transmitting a physical layer protocol data unit (PPDU), in particular reducing the PAPR for the U-SIG field. Methods are disclosed for both an access point (AP) and stations (STA).

First claim

What is claimed is:

1. A communication device for transmitting a physical layer protocol data unit, PPDU, to one or more receiving devices, wherein the communication device comprises:
a processor configured to:
receive a trigger frame in a first PPDU;
obtain a sequence of disregard bits of a universal signal, U-SIG, field in the first PPDU, wherein the sequence of disregard bits comprises at least one bit set to 0; and
copy the sequence of disregard bits into the U-SIG field of a second PPDU; and
a transmitter configured to transmit the second PPDU, wherein the second PPDU comprises the sequence of disregard bits.

2. The communication device according to claim 1 , wherein the U-SIG field comprises at least a first U-SIG symbol and a second U-SIG symbol.

3. The communication device according to claim 1 , wherein the processor is configured to obtain the sequence of disregard bits by obtaining one of the sequences in the set {11111111110, 11111011110, 01111111110}.

4. An access point for transmitting a physical layer protocol data unit, PPDU, to one or more communication devices, wherein the access point comprises:
a processor configured to set a field of a trigger frame to a sequence comprising at least one 0; and
a transmitter configured to transmit the PPDU to the one or more communication devices, wherein the PPDU comprises the field of the trigger frame, wherein the field of the trigger frame is configured to be copied by the one or more communication devices into disregard bits of a universal signal, U-SIG, sequence.

5. The access point according to claim 4 , wherein the processor is configured to set the field of the trigger frame by setting the field to one of the sequences in the set {11111111110, 11111011110, 01111111110}.

6. A method for transmitting a physical layer protocol data unit, PPDU, in a communication device, the method comprising:
receiving a trigger frame in a first PPDU;
obtaining a sequence of disregard bits of a universal signal, U-SIG, field in the first PPDU, wherein the sequence of disregard bits comprises at least one bit set to 0;
copying the sequence of disregard bits into the U-SIG field of a second PPDU; and
transmitting the second PPDU, wherein the second PPDU comprises the sequence of disregard bits.

7. The method according to claim 6 , wherein the U-SIG field comprises at least a first U-SIG symbol and a second U-SIG symbol.

8. The method according to claim 6 , wherein obtaining the sequence of disregard bits comprises obtaining one of the sequences in the set {11111111110, 11111011110, 01111111110}.

9. A non-transitory machine-readable storage medium having stored thereon processor-executable instructions, which when executed by a processor of a device, cause the device to implement a method according to claim 6 .

10. A non-transitory computer program product comprising a computer-readable storage medium having computer-readable instructions stored thereon, the computer-readable instructions being executable by a device comprising processing hardware to execute a method according to claim 6 .

11. A method for transmitting a physical layer protocol data unit, PPDU, in an access point, wherein the method comprises:
setting a field of a trigger frame to a sequence comprising at least one 0; and
transmitting the PPDU to one or more communication devices, wherein the PPDU comprises the field of the trigger frame, wherein the field of the trigger frame is configured to be copied by the one or more communication devices into disregard bits of a universal signal, U-SIG, sequence.

12. The method according to claim 11 , wherein setting the field of the trigger frame to the sequence of disregard bits comprises setting the field of the trigger frame to one of the sequences in the set {11111111110, 11111011110, 01111111110}.

13. A non-transitory machine-readable storage medium having stored thereon processor-executable instructions, which when executed by a processor of a device, cause the device to implement a method according to claim 11 .

14. A non-transitory computer program product comprising a computer-readable storage medium having computer-readable instructions stored thereon, the computer-readable instructions being executable by a device comprising processing hardware to execute a method according to claim 11 .

Assignees

• Huawei Tech Co Ltd

Inventors

• Shilo Shimon
• Redlich Oded
• Tsodik Genadiy
• Yu Jian
• Gan Ming
• Melzer Ezer
• Ezri Doron
• Levinbook Yoav
• Hu Mengshi

Classifications

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04W28/065

  using assembly or disassembly of packets · CPC title

• H04L27/2615 Primary

  Reduction thereof using coding · CPC title

• H04L27/2614 Primary

  Peak power aspects · CPC title