Low power indoor frame format

Patent metadata

Field	Value
Publication number	US-12323853-B2
Application number	US-202117403521-A
Country	US
Kind code	B2
Filing date	Aug 16, 2021
Priority date	Aug 24, 2020
Publication date	Jun 3, 2025
Grant date	Jun 3, 2025

Abstract

Methods and apparatuses for encoding and decoding a physical layer (PHY) protocol data unit (PPDU) for low power indoor (LPI) wireless communication, which includes a preamble portion and a payload portion. The preamble portion includes a first universal signal field (U-SIG), the first U-SIG comprising information regarding a payload portion of the PPDU. The preamble portion further includes a second U-SIG, which contains identical information regarding the payload portion of the PPDU. The repetition of the U-SIG may improve robustness of the preamble portion detection and also enable auto-detection of the PPDU for LPI communication.

First claim

The invention claimed is:

1. A method of encoding a physical layer (PHY) protocol data unit (PPDU) for low power indoor (LPI) wireless communication, the method comprising:
encoding a preamble portion of the PPDU, wherein the encoding further comprises:
encoding a first universal signal field (U-SIG), the first U-SIG comprising one or more information bits regarding a payload portion of the PPDU;
encoding a second U-SIG, the second U-SIG including identical one or more information bits regarding the payload portion of the PPDU; and
encoding a plurality of U-SIGs in addition to the first and second U-SIG, wherein each of the plurality of U-SIGs includes the identical one or more information bits regarding the payload portion of the PPDU, and wherein the second U-SIG and each of the plurality of U-SIGs in addition to the first and second U-SIG represent a respective time domain repetition of the first U-SIG.

2. The method of claim 1 , wherein the encoding of the first U-SIG is followed by the encoding of the second U-SIG.

3. The method of claim 1 further comprising applying a Dual sub-Carrier Modulation (DCM) to the second U-SIG.

4. The method of claim 1 further comprising applying a bitwise interleaver scheme to the second U-SIG.

5. The method of claim 1 , wherein the first U-SIG and the second U-SIG are encoded with a modulation and coding scheme (MCS) having a code rate greater than one half, the method further comprising:
adopting a first binary convolution code (BCC) puncturing pattern for the first U-SIG; and
adopting a second BCC puncturing pattern for the second U-SIG, wherein the second BCC puncturing pattern is different from the first BCC puncturing pattern.

6. The method of claim 1 , wherein the LPI wireless communication is defined for an extended range mode of operation.

7. The method of claim 6 , where the extended range mode of operation is defined for a MCS scheme of MCS0 using a single spatial stream in non-punctured channels having one of 80 MHz, 160 MHz and 320 MHz bandwidth intended for a single station (STA).

8. An apparatus of an access point (AP), the apparatus comprising a non-transitory memory storage unit, and a processing unit operably coupled to the non-transitory memory storage unit, the processing unit configured to:
encode a preamble portion of the PPDU for low power indoor (LPI) wireless communication, wherein the preamble portion of the PPDU comprises:
a first universal signal field (U-SIG), the first U-SIG comprising one or more information bits regarding a payload portion of the PPDU;
a second U-SIG, the second U-SIG including identical one or more information bits regarding the payload portion of the PPDU; and
a plurality of U-SIGs in addition to the first and second U-SIG, wherein each of the plurality of U-SIGs includes the identical one or more information bits regarding the payload portion of the PPDU and wherein the second U-SIG and each of the plurality of U-SIGs in addition to the first and second U-SIG represent a respective time domain repetition of the first U-SIG; and

transmit the encoded PPDU.

9. The apparatus of claim 8 , wherein a DCM scheme is applied to the second U-SIG by the processing unit.

10. The apparatus of claim 8 , wherein a bitwise interleaver scheme is applied to the second U-SIG by the processing unit.

11. The apparatus of claim 8 , wherein the first U-SIG and the second U-SIG are encoded with a modulation and coding scheme (MCS) having a code rate greater than one half, wherein
a first binary convolution code (BCC) puncturing pattern is applied, by the processing unit, to the first U-SIG; and
a second BCC puncturing pattern is applied, by the processing unit, to the second U-SIG, wherein the second BCC puncturing pattern is different from the first BCC puncturing pattern.

12. An apparatus of a station (STA), the apparatus comprising a non-transitory memory storage unit, and a processing unit operably coupled to the non-transitory memory storage unit, the processing unit configured to:
receive a preamble portion of the PPDU, wherein detection further comprises:
detecting a first universal signal field (U-SIG) in the preamble portion of the PPDU, the first U-SIG comprising one or more information bits regarding a payload portion of the PPDU;
detecting a second U-SIG, the second U-SIG includes identical one or more information bits regarding the payload portion of the PPDU;
detecting a plurality of U-SIGs in addition to the first U-SIG and the second U-SIG, wherein each of the plurality of U-SIGs includes the identical one or more information bits regarding the payload portion of the PPDU, and wherein the second U-SIG and each of the plurality of U-SIGs in addition to the first and second U-SIG represent a respective time domain repetition of the first U-SIG;
combining the plurality of U-SIGs with the first and second U-SIG; and
decoding the preamble portion of the PPDU based on the combined plurality of U-SIGs and first and second U-SIG.

13. The apparatus of claim 12 , wherein prior to combining the first and the second U-SIG, the processing unit is configured to:
perform a correlation check between the first and the second U-SIG; and
upon a positive correlation, automatically determine the PPDU is configured for low power indoor (LPI) wireless communication.

14. The apparatus of claim 13 , the automatic determining of the PPDU further includes automatically determining a MCS scheme of MCS0 using a single spatial stream in non-punctured channels having one of 80 MHz, 160 MHz and 320 MHz bandwidth intended for a single station (STA).

15. The apparatus of claim 12 , wherein the preamble portion further comprises a plurality of U-SIGs in addition to the first and second U-SIG, the processing is further configured to:
combine the plurality of U-SIGs with the first and the second U-SIG to improve robustness of the preamble portion detection.

16. The apparatus of claim 12 , wherein the processing unit is further configured to decode the second U-SIG applied with a DCM scheme.

17. The apparatus of claim 12 , wherein the first U-SIG and the second U-SIG in the received preamble portion of the PPDU are encoded with a modulation and coding scheme (MCS) having a code rate greater than one half, the processing unit further configured to detect the first U-SIG having a first binary convolution code (BCC) puncturing pattern; and detect the second U-SIG having a second BCC puncturing pattern, wherein the second BCC puncturing pattern is different from the first BCC puncturing pattern.

18. A method of encoding a physical layer (PHY) protocol data unit (PPDU) for low power indoor (LPI) wireless communication, the method comprising:
encoding a preamble portion of the PPDU, wherein the encoding further comprises:
encoding a first universal signal field (U-SIG), the first U-SIG comprising one or more information bits regarding a payload portion of the PPDU without an Extremely High Throughput (EHT) signal field (SIG) in the preamble portion;
encoding a second U-SIG, the second U-SIG including identical one or more information bits regarding the payload portion of the PPDU; and
encoding a plurality of U-SIGs in addition to the first and second U-SIG, wherein each of the plurality of U-SIGs includes the identical one or more information bits regarding the payload portion of the PPDU, and wherein the second U-SIG and each of the plurality of U-SIGs in addition to the first and second U-SIG represent a respective time domain repetition of the first U-SIG.

Assignees

• Suh Jung Hoon
• Xin Yan
• Aboul Magd Osama
• Huawei Tech Co Ltd

Inventors

• Suh Jung Hoon
• Xin Yan
• Aboul-Magd Osama

Classifications

• H04L1/0003

  by switching between different modulation schemes · CPC title

• H04L1/0059

  Convolutional codes · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04L1/0071

  Use of interleaving (interleaving per se H03M13/27) · CPC title

• H04L1/0072

  Error control for data other than payload data, e.g. control data · CPC title