Method and apparatus for transmitting physical layer protocol data unit

Patent metadata

Field	Value
Publication number	US-12355603-B2
Application number	US-202218073381-A
Country	US
Kind code	B2
Filing date	Dec 1, 2022
Priority date	Jun 2, 2020
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

Embodiments of this application provide a method and an apparatus for transmitting a physical layer protocol data unit, to design a short training field sequence for a larger channel bandwidth. The short training field sequence designed in this application has a smaller peak-to-average power ratio PAPR and better performance. The method includes: generating a physical layer protocol data unit PPDU that complies with the 802.11be standard, where the PPDU includes a short training field, and a quantity of subcarriers of a frequency domain sequence of the short training field is greater than 2048; and sending the PPDU on a target channel, where a bandwidth of the target channel is greater than or equal to 160 MHz.

First claim

What is claimed is:

1. A method comprising:
generating, by a transmit end, a physical layer protocol data unit (PPDU), wherein the PPDU comprises a short training field, and a quantity of subcarriers corresponding to a frequency domain sequence of the short training field is greater than 2048; and
sending, by the transmit end, the PPDU on a target channel, wherein a bandwidth of the target channel is 320 MHz; and
wherein the frequency domain sequence of the short training field is {HES −496:16:496 , 0, HES −496:16:496 , 0, −HES −496:16:496 , 0, −HES −496:16:496 },
HES −496:16:496 ={M,1,−M,0,−M,1,−M}·(1+j)/√{square root over (2)}, and M={−1,−1,−1,1,1,1,−1,1,1,1,−1,1,1,−1,1}, wherein j is an imaginary number; and
wherein the transmit end is applied to an access point (AP).

2. The method according to claim 1 , wherein the PPDU is one of: a high efficiency single-user physical layer protocol data unit (HE SU PPDU), a high efficiency multi-user physical layer protocol data unit (HE MU PPDU), or a high efficiency extended range single-user physical layer protocol data unit (HE ER SU PPDU).

3. The method according to claim 1 , wherein a time domain waveform of the short training field comprises five repetition periods, and a length of each period of the five repetition periods is 0.8 μs.

4. The method according to claim 1 , wherein a peak to average power ratio (PAPR) value of the short training field is 8.2020 dB when a channel puncturing pattern is [1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1], “1” indicates a 20 MHz channel bandwidth that is not punctured, and “0” indicates a 20 MHz channel that is punctured.

5. A method comprising:
receiving, by a receive end, a physical layer protocol data unit (PPDU) on a target channel, wherein the PPDU comprises a short training field, a quantity of subcarriers corresponding to a frequency domain sequence of the short training field is greater than 2048, and a bandwidth of the target channel is 320 MHz; and
parsing, by the receive end, the PPDU; and
wherein the frequency domain sequence of the short training field is {HES −496:16:496 , 0, HES −496:16:496 , 0, −HES −496:16:496 , 0, −HES −496:16:496 },
HES −496:16:496 ={M,1,−M,0,−M,1,−M}·(1+j)/√{square root over (2)}, and M={−1,−1,−1,1,1,1,−1,1,1,1,−1,1,1,−1,1}, wherein j is an imaginary number; and
wherein the receive end is applied to a station.

6. The method according to claim 5 , wherein the PPDU is one of: a high efficiency single-user physical layer protocol data unit (HE SU PPDU), a high efficiency multi-user physical layer protocol data unit (HE MU PPDU), or a high efficiency extended range single-user physical layer protocol data unit (HE ER SU PPDU).

7. The method according to claim 5 , wherein a time domain waveform of the short training field comprises five repetition periods, and a length of each period of the five repetition periods is 0.8 μs.

8. The method according to claim 5 , wherein a peak to average power ratio (PAPR) value of the short training field is 8.2020 dB when a channel puncturing pattern is [1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1], wherein “1” indicates a 20 MHz channel bandwidth that is not punctured, and “0” indicates a 20 MHz channel that is punctured.

9. An apparatus, comprising:
at least one processor; and
at least one non-transitory memory, configured to store computer instructions, which when executed by the at least one processor, cause the apparatus to:
generate a physical layer protocol data unit (PPDU), wherein the PPDU comprises a short training field, and a quantity of subcarriers corresponding to a frequency domain sequence of the short training field is greater than 2048; and
send the PPDU on a target channel, wherein a bandwidth of the target channel is 320 MHz; and
wherein the frequency domain sequence of the short training field is {HES −496:16:496 , 0, HES −496:16:496 , 0, −HES −496:16:496 , 0, −HES −496:16:496 },
HES −496:16:496 ={M,1,−M,0,−M,1,−M}·(1+j)/√{square root over (2)}, and M={−1,−1,−1,1,1,1,−1,1,1,1,−1,1,1,−1,1}, wherein j is an imaginary number; and
wherein the apparatus is applied to an access point (AP).

10. The apparatus according to claim 9 , wherein the PPDU is one of: a high efficiency single-user physical layer protocol data unit (HE SU PPDU), a high efficiency multi-user physical layer protocol data unit (HE MU PPDU), or a high efficiency extended range single-user physical layer protocol data unit (HE ER SU PPDU).

11. The apparatus according to claim 9 , wherein a time domain waveform of the short training field comprises five repetition periods, and a length of each period of the five repetition periods is 0.8 μs.

12. The apparatus according to claim 9 , wherein a peak to average power ratio (PAPR) value of the short training field is 8.2020 dB when a channel puncturing pattern is [1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1], “1” indicates a 20 MHz channel bandwidth that is not punctured, and “0” indicates a 20 MHz channel that is punctured.

13. The apparatus according to claim 9 , wherein the apparatus is the access point.

14. An apparatus, comprising:
at least one processor; and
at least one non-transitory memory, configured to store computer instructions, which when executed by the at least one processor, cause the apparatus to:
receive a physical layer protocol data unit (PPDU) on a target channel, wherein the PPDU comprises a short training field, a quantity of subcarriers corresponding to a frequency domain sequence of the short training field is greater than 2048, and a bandwidth of the target channel is 320 MHz; and
parse the PPDU; and
wherein the frequency domain sequence of the short training field is {HES −496:16:496 , 0, HES −496:16:496 , 0, −HES −496:16:496 , 0, −HES −496:16:496 },
HES −496:16:496 ={M,1,−M,0,−M,1,−M}·(1+j)/√{square root over (2)}, and M={−1,−1,−1,1,1,1,−1,1,1,1,−1,1,1,−1,1}, wherein j is an imaginary number; and
wherein the apparatus is applied to a station.

15. The apparatus according to claim 14 , wherein the PPDU is one of: a high efficiency single-user physical layer protocol data unit (HE SU PPDU), a high efficiency multi-user physical layer protocol data unit (HE MU PPDU), or a high efficiency extended range single-user physical layer protocol data unit (HE ER SU PPDU).

16. The apparatus according to claim 14 , wherein a time domain waveform of the short training field comprises five repetition periods, and a length of each period of the five repetition periods is 0.8 μs.

17. The apparatus according to claim 14 , wherein a peak to average power ratio (PAPR) value of the short training field is 8.2020 dB when a channel puncturing pattern is [1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1], “1” indicates a 20 MHz channel bandwidth that is not punctured, and “0” indicates a 20 MHz channel that is punctured.

18. The apparatus according to claim 14 , wherein the apparatus is the station.

Assignees

• Huawei Tech Co Ltd

Inventors

• Liang Dandan
• Gan Ming
• Zhou Zhengchun
• Lei Xianfu
• Yang Yang
• Tang Xiaohu
• Lin Wei
• Liu Chenchen

Classifications

• H04L69/323 Primary

  in the physical layer [OSI layer 1] · CPC title

• H04L5/0044

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title

• H04L1/0069

  Puncturing patterns · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04L27/2614

  Peak power aspects · CPC title