Granted Patent B2

US 12,316,557 · App. 18/340,567 · Granted May 27, 2025

Inventors: Chenchen Liu (Shenzhen, CN); Bo Gong (Shenzhen, CN); Ming Gan (Shenzhen, CN)

Assignee: Huawei Technologies Co., Ltd.

H04L5/0044H04L5/0094

Abstract

Claims (154)

1. A method, comprising:

generating a physical layer protocol data unit (PPDU) of a 320 MHz bandwidth, wherein some or all fields of the PPDU are rotated in the 320 MHz bandwidth based on a rotation factor sequence, the 320 MHz bandwidth comprises sixteen 20 MHz sub-channels, the rotation factor sequence comprises 16 rotation factors, and each 20 MHz sub-channel corresponds to one rotation factor; and

sending the PPDU; and

wherein the rotation factor sequence is [1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, −1, −1, 1, 1, 1]; and

wherein for the rotation factor sequence, a correspondence between a subcarrier and the corresponding rotation factor is shown as the following:

γ

k

,

320

⁢

MHz

=

{

1

,

k

<

-

448

-

1

,

-

448

≤

k

<

-

256

1

,

-

256

≤

k

<

-

192

-

1

,

-

192

≤

k

<

0

1

,

0

≤

k

<

64

-

1

,

64

≤

k

<

320

1

,

k

≥

320

;

and

wherein k is a subcarrier index.

2. The method according to claim 1 , wherein all the fields of the PPDU are transmitted in a non-high throughput (non-HT) duplicate mode.

3. The method according to claim 2 , wherein all the fields of the PPDU are rotated based on the rotation factor sequence.

4. The method according to claim 2 , wherein all the fields of the PPDU comprise a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal field (L-SIG field), and a data field.

5. The method according to claim 1 , wherein the some fields of the PPDU are duplicated and transmitted on a per-20 MHz sub-channel basis.

6. The method according to claim 5 , wherein the some fields of the PPDU are rotated based on the rotation factor sequence.

7. The method according to claim 5 , wherein the some fields of the PPDU comprise one or more of the following fields: a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal field (L-SIG field), a repeated legacy signal field (RL-SIG field), or a universal signal field (U-SIG field).

8. The method according to claim 7 , wherein a rate of the L-SIG field is a fixed value, and a value of a length indicated by the L-SIG field is set in a preset manner to distinguish between protocol versions.

9. The method according to claim 7 , wherein the L-SIG field carries fixed values [−1, −1, −1, 1] on four subcarriers −28, −27, 27, and 28 of each 20 MHz sub-channel, and the RL-SIG field carries fixed values [−1, −1, −1, 1] on four subcarriers −28, −27, 27, and 28 of each 20 MHz sub-channel.

10. The method according to claim 7 , wherein the U-SIG field transmits additional information on four subcarriers −28, −27, 27, and 28 of each 20 MHz sub-channel, and an extremely high throughput signal field (EHT-SIG field) of the PPDU transmits additional information on four subcarriers −28, −27, 27, and 28 of each 20 MHz sub-channel.

11. An apparatus, comprising a processor and a transceiver, wherein:

the processor is configured to generate a physical layer protocol data unit (PPDU) of a 320 MHz bandwidth, wherein some or all fields of the PPDU are rotated in the 320 MHz bandwidth based on a rotation factor sequence, the 320 MHz bandwidth comprises sixteen 20 MHz sub-channels, the rotation factor sequence comprises 16 rotation factors, and each 20 MHz sub-channel corresponds to one rotation factor; and

the transceiver is configured to send the PPDU; and

wherein the rotation factor sequence is [1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, −1, −1, 1, 1, 1]; and

wherein for the rotation factor sequence, a correspondence between a subcarrier and the corresponding rotation factor is shown as the following:

γ

k

,

320

⁢

MHz

=

{

1

,

k

<

-

448

-

1

,

-

448

≤

k

<

-

256

1

,

-

256

≤

k

<

-

192

-

1

,

-

192

≤

k

<

0

1

,

0

≤

k

<

64

-

1

,

64

≤

k

<

320

1

,

k

≥

320

;

and

wherein k is a subcarrier index.

12. The apparatus according to claim 11 , wherein the some fields of the PPDU are duplicated and transmitted on a per-20 MHz sub-channel basis.

13. The apparatus according to claim 12 , wherein the some fields of the PPDU are rotated based on the rotation factor sequence.

14. The apparatus according to claim 12 , wherein the some fields of the PPDU comprise one or more of the following fields: a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal field (L-SIG field), a repeated legacy signal field (RL-SIG field), or a universal signal field (U-SIG field).

15. The apparatus according to claim 14 , wherein the L-SIG field carries fixed values [−1, −1, −1, 1] on four subcarriers −28, −27, 27, and 28 of each 20 MHz sub-channel, and the RL-SIG field carries fixed values [−1, −1, −1, 1] on four subcarriers −28, −27, 27, and 28 of each 20 MHz sub-channel.

16. The apparatus according to claim 14 , wherein the U-SIG field transmits additional information on four subcarriers −28, −27, 27, and 28 of each 20 MHz sub-channel, and an extremely high throughput signal field (EHT-SIG field) of the PPDU transmits additional information on four subcarriers −28, −27, 27, and 28 of each 20 MHz sub-channel.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (73)