Spectral masks for subchannel puncturing in EHT networks

Patent metadata

Field	Value
Publication number	US-11962406-B2
Application number	US-202017124792-A
Country	US
Kind code	B2
Filing date	Dec 17, 2020
Priority date	Jul 22, 2020
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

An extremely high-throughput (EHT) station (STA) may encode an EHT PPDU for transmission on a plurality of subchannels. The EHT STA may determine a spectral mask to apply to the EHT PPDU prior to transmission of the EHT PPDU. When preamble puncturing is performed, the EHT STA may apply an overall spectral mask to the EHT PPDU prior to transmission. The overall spectral mask may be based on an interim spectral mask and a preamble-puncture spectral mask. The subchannels may be in a 6 GHz band and the EHT STA may determine if preamble puncturing is to be performed for one or more of the subchannels based on a presence of incumbents in the one or more of the subchannels, although the scope of the embodiments is not limited in this respect.

First claim

What is claimed is:

1. An apparatus of an extremely high-throughput (EHT) station (STA), the EHT station comprising: processing circuitry; and memory, wherein the processing circuitry is configured to:
encode an EHT physical layer protocol data unit may be a physical layer conformance procedure (PLCP) protocol data unit (PPDU) for transmission on a plurality of subchannels, the EHT PPDU comprising a preamble portion and a subsequent portion; and
determine a spectral mask to apply to the EHT PPDU prior to transmission of the EHT PPDU,
wherein when preamble puncturing is performed, the processing circuitry is configured to:
apply an overall spectral mask to the EHT PPDU prior to transmission by applying an interim spectral mask and further applying a preamble-puncture spectral mask to the EHT PPDU; and
configure the EHT PPDU for transmission on each of the subchannels of the plurality except for one or more punctured subchannels of the plurality,

wherein when the preamble puncturing is not performed, the processing circuitry is configured to:
configure the EHT PPDU for transmission on each of the subchannels of the plurality by only applying the interim spectral mask to the EHT PPDU,

wherein the preamble-puncture spectral mask is determined based on whether the one or more punctured subchannels comprise edge subchannels or comprise middle subchannels of the EHT PPDU.

2. The apparatus of claim 1 , wherein the one or more subchannels comprise subchannels in a 6 GHz band, and wherein preamble puncturing is performed on the punctured subchannels based on a presence of incumbents.

3. The apparatus of claim 1 , wherein when the one or more punctured subchannels comprise an edge subchannel,
the processing circuitry is configured to:
determine a mask value for the overall spectral mask,
wherein for each frequency where a non-preamble-puncture spectral mask has a value of zero decibels relative to a reference level (dBr) and the preamble-puncture spectral mask does not have a value in an occupied one of the subchannels, the processing circuitry is to set the mask value for the overall spectral mask to zero dBr, and
wherein for other frequencies where the non-preamble-puncture spectral mask and the preamble-puncture spectral mask both have values greater or equal to −40 dBr, the processing circuitry is to set the mask value for the overall spectral mask to a lower value of the non-preamble-puncture spectral mask and the preamble-puncture spectral mask; and
apply the overall spectral mask at an edge of an occupied one of the subchannels, the edge of the occupied subchannel being adjacent to one of the punctured subchannels.

4. The apparatus of claim 1 , wherein when two or more adjacent subchannels within a central portion of the EHT PPDU are punctured, the two or more adjacent subchannels comprising a lowest punctured subchannel and a highest punctured subchannel,
the processing circuitry is configured to:
apply a lower subchannel edge mask at a lower edge at the lowest punctured subchannel and apply a higher subchannel edge mask at a higher edge of the highest punctured subchannel;
determine mask values for the overall spectral mask,
wherein for each frequency where the lower subchannel edge mask and the higher subchannel edge mask have a value greater than −25 dBr and less that −20 dBr, the processing circuitry is to set the mask value for the overall spectral mask to a larger value of the lower subchannel edge mask and the higher subchannel edge mask, and
wherein for each frequency where a non-preamble-puncture spectral mask has a value and the preamble-puncture spectral mask does not have a value in an occupied subchannel, the processing circuitry is to set the mask value for the overall spectral mask to the value of the non-preamble-puncture spectral mask, and
wherein for other frequencies where the non-preamble-puncture spectral mask and the preamble-puncture spectral mask both have values greater or equal to −25 dBr, the processing circuitry is to set the mask value for the overall spectral mask to a lower value of the non-preamble-puncture spectral mask and the preamble-puncture spectral mask.

5. The apparatus of claim 1 , wherein when a single subchannel within a central portion of the EHT PPDU is punctured,
the processing circuitry is configured to:
determine mask values for the overall spectral mask,
wherein for each frequency where the non-preamble-puncture spectral mask has a value and the preamble-puncture spectral mask does not have a value in an occupied subchannel, the processing circuitry is to set the mask value for the overall spectral mask to the value of the non-preamble-puncture spectral mask, and
wherein for other frequencies where a non-preamble-puncture spectral mask and the preamble-puncture spectral mask both have values greater or equal to −23 dBr, the processing circuitry is to set the mask value for the overall spectral mask to a lower value of the non-preamble-puncture spectral mask and the preamble-puncture spectral mask.

6. The apparatus of claim 1 , wherein the processing circuitry is to encode the EHT PPDU to include a universal signal field (U-SIG) within the preamble portion, wherein a bandwidth of the spectral mask is indicated by a bandwidth indicator in a bandwidth subfield of the U-SIG,
wherein the processing circuitry is configured to refrain from encoding data for transmission on the punctured subchannels, and
wherein the processing circuitry is to configure the EHT STA to transmit the EHT PPDU after application of the spectral mask, and after further application of the preamble-puncture spectral mask when preamble puncturing is performed.

7. The apparatus of claim 3 , wherein the EHT PPDU comprises an 80 MHz PPDU comprising four 20 MHz channels with 20 MHz edge subchannel puncturing in which a highest and lowest 20 MHz channels of the 80 MHz PPDU are punctured.

8. The apparatus of claim 3 , wherein the EHT PPDU comprises an 160 MHz PPDU comprising eight 20 MHz channels with 40 MHz edge subchannel puncturing in which a highest and lowest two 20 MHz channels of the 160 MHz PPDU are punctured.

9. The apparatus of claim 3 , wherein the EHT PPDU comprises an 320 MHz PPDU comprising sixteen 20 MHz channels with 80 MHz edge subchannel puncturing in which a highest and lowest four 20 MHz channels of the 320 MHz PPDU are punctured.

10. The apparatus of claim 4 , wherein the EHT PPDU comprises an 320 MHz PPDU comprising sixteen 20 MHz channels with 80 MHz middle subchannel puncturing in which a central four 20 MHz channels of the 320 MHz PPDU are punctured.

11. The apparatus of claim 5 , wherein the EHT PPDU comprises an 80 MHz PPDU comprising four 20 MHz channels with 20 MHz middle subchannel puncturing in which one of a central 20 MHz channels of the 80 MHz PPDU are punctured.

12. The apparatus of claim 5 , wherein the EHT PPDU comprises an 160 MHz PPDU comprising four 20 MHz channels with 40 MHz middle subchannel puncturing in which one of a central two 20 MHz channels of the 160 MHz PPDU are punctured.

13. A non-transitory computer-readable storage medium that stores instructions for execution by processing circuitry of an extremely high-throughput (EHT) station (STA) to configure the EHT STA to:
encode an EHT physical layer protocol data unit may be a physical layer conformance procedure (PLCP) protocol data unit (PPDU) for transmission on a plurality of subchannels, the EHT PPDU comprising a preamble portion and a subsequent portion; and
determine a spectral mask to apply to the EHT PPDU prior to transmission of the EHT PPDU,
wherein when preamble puncturing is performed, the processing circuitry is

Assignees

• Intel Corp

Inventors

• Chen Xiaogang
• Li Qinghua
• Kenney Thomas J
• Gurevitz Assaf
• Friedman Avishay

Classifications

• H04L1/0013 Primary

  Rate matching, e.g. puncturing or repetition of code symbols · CPC title

• H04W80/02

  Data link layer protocols · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04L5/0066 Primary

  Requirements on out-of-channel emissions · CPC title