IP Library › Granted Patent US 12,294,477

Granted Patent B2

US 12,294,477 · App. 18/010,952 · Granted May 6, 2025

Method and apparatus for receiving PPDU with duplicated data through 80 MHz band in wireless LAN system

Inventors: Eunsung Park (Seoul, KR); Jinyoung Chun (Seoul, KR); Jinsoo Choi (Seoul, KR); Dongguk Lim (Seoul, KR)

H04L27/2621 H04L1/0068 H04W72/0453 H04W84/12

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Patent No.: US 12,294,477
App. No.: 18/010,952
Granted: May 6, 2025
Kind: B2

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Abstract

A method and an apparatus for receiving a PPDU in a wireless LAN system are proposed. Specifically, a receiving STA receives the PPDU from a transmitting STA through an 80 MHz band, and decodes the PPDU. The PPDU includes a preamble and a data field. The 80 MHz band includes first and second 484 tones RUs. The data field includes first data for the first 484 tone RU and second data for the second 484 tone RU. The second data is data obtained by duplicating the first data. The first and second 484 tone RUs are resource units including 484 tones.

Claims (69)

1. A method performed in a wireless local area network (WLAN) system, the method comprising:

receiving, by a receiving station (STA), a Physical Protocol Data Unit (PPDU) from a transmitting STA through an 80 MHz band; and

decoding, by the receiving STA, the PPDU,

wherein the PPDU includes a preamble and a data field,

wherein the 80 MHz band includes first and second 484 tone-resource units (RUs),

wherein the data field includes first data for the first 484-tone RU and second data for the second 484-tone RU,

wherein the second data is data obtained by duplicating the first data and applying phase rotation thereto,

wherein the first and second 484-tone RUs are resource units including 484 tones,

wherein constellation demapping is performed on the first data based on binary phase shift keying (BPSK) and dual carrier modulation (DCM) in the first 484-tone RU,

wherein a coding rate for the BPSK is ½,

wherein, based on the DCM being performed in the first 484-tone RU, a number of data subcarriers per RU is equal to half a number of data subcarriers per RU in an absence of the DCM, and

wherein the first data and the second data are received through a single spatial stream.

2. The method of claim 1 ,

wherein the preamble includes a Universal-Signal (U-SIG),

wherein the U-SIG includes a bandwidth (BW) field,

wherein the BW field indicates a bandwidth of the PPDU as 80 MHz.

3. The method of claim 1 , wherein the PPDU includes an Extremely High Throughput-Short Training Field (EHT-STF) and an Extremely High Throughput-Long Training Field (EHT-LTF),

wherein the EHT-STF includes an EHT-STF sequence for the 80 MHz band,

wherein the EHT-LTF includes an EHT-LTF sequence for the 80 MHz band.

4. The method of claim 3 , wherein in the EHT-STF sequence for the 80 MHz band, coefficients for tones not included in the first and second 484-tone RUs is punctured,

wherein in the EHT-LTF sequence for the 80 MHz band, coefficients for tones not included in the first and second 484-tone RUs is punctured.

5. The method of claim 4 , wherein the EHT-STF sequence for the 80 MHz band is a sequence including M sequences and defined as follows,

{M 1 −M 0 −M 1 −M}*(1+j)/sqrt(2), sqrt () represents a square root,

wherein the M sequence is defined as follows,

M= {−1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1}.

6. The method of claim 4 , wherein the EHT-LTF sequence for the 80 MHz band is defined as follows,

{−1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0,−1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, 0, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1}.

7. A receiving station (STA) configured to operate in a wireless local area network (WLAN) system, the receiving STA comprising:

a transceiver;

a processor operatively connected to the transceiver; and

a memory operatively connected to the processor and storing instructions that, when executed by the processor, perform operations comprising:

receiving a Physical Protocol Data Unit (PPDU) from a transmitting station (STA) through an 80 MHz band, and

decoding the PPDU,

wherein the PPDU includes a preamble and a data field,

wherein the 80 MHz band includes first and second 484 tone-resource units (RUs),

wherein the data field includes first data for the first 484-tone RU and second data for the second 484-tone RU,

wherein the second data is data obtained by duplicating the first data and applying phase rotation thereto,

wherein the first and second 484-tone RUs are resource units including 484 tones,

wherein constellation demapping is performed on the first data based on binary phase shift keying (BPSK) and dual carrier modulation (DCM) in the first 484-tone RU,

wherein a coding rate for the BPSK is ½,

wherein, based on the DCM being performed in the first 484-tone RU, a number of data subcarriers per RU is equal to half a number of data subcarriers per RU in an absence of the DCM, and

wherein the first data and the second data are received through a single spatial stream.

8. A method performed in a wireless local area network (WLAN) system, the method comprising:

generating, by a transmitting station (STA), a Physical Protocol Data Unit (PPDU); and

transmitting, by the transmitting STA, the PPDU to a receiving STA through an 80 MHz band,

wherein the PPDU includes a preamble and a data field,

wherein the 80 MHz band includes first and second 484 tone-resource units (RUs),

wherein the data field includes first data for the first 484-tone RU and second data for the second 484-tone RU,

wherein the second data is data obtained by duplicating the first data and applying phase rotation thereto,

wherein the first and second 484-tone RUs are resource units including 484 tones,

wherein constellation mapping is performed on the first data based on binary phase shift keying (BPSK) and dual carrier modulation (DCM) in the first 484-tone RU,

wherein a coding rate for the BPSK is ½,

wherein, based on the DCM being performed in the first 484-tone RU, a number of data subcarriers per RU is equal to half a number of data subcarriers per RU in an absence of the DCM, and

wherein the first data and the second data are transmitted through a single spatial stream.

9. The method of claim 8 ,

wherein the preamble includes a Universal-Signal (U-SIG),

wherein the U-SIG includes a bandwidth (BW) field,

wherein the BW field indicates a bandwidth of the PPDU as 80 MHz.

10. The method of claim 8 , wherein the PPDU includes an Extremely High Throughput-Short Training Field (EHT-STF) and an Extremely High Throughput-Long Training Field (EHT-LTF),

wherein the EHT-STF includes an EHT-STF sequence for the 80 MHz band,

wherein the EHT-LTF includes an EHT-LTF sequence for the 80 MHz band.

11. The method of claim 10 , wherein in the EHT-STF sequence for the 80 MHz band, coefficients for tones not included in the first and second 484-tone RUs is punctured,

wherein in the EHT-LTF sequence for the 80 MHz band, coefficients for tones not included in the first and second 484-tone RUs is punctured.

12. The method of claim 11 , wherein the EHT-STF sequence for the 80 MHz band is a sequence including M sequences and defined as follows,

{M 1 −M 0 −M 1 −M}*(1+j)/sqrt(2), sqrt () represents a square root,

wherein the M sequence is defined as follows,

M= {−1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1}.

13. The method of claim 11 , wherein the EHT-LTF sequence for the 80 MHz band is defined as follows,

{−1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0,0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, 0, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1}.

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 16, 2023

From: PARK, EUNSUNG; CHUN, JINYOUNG; CHOI, JINSOO; LIM, DONGGUK

To: LG ELECTRONICS INC.

Reel/Frame 063977/0867 →

Priority Claims (3)

KR 10-2020-0081636 · Jul 2, 2020 · national

KR 10-2020-0081649 · Jul 2, 2020 · national

KR 10-2020-0084241 · Jul 8, 2020 · national

Continuity (1)

Related Publication 20230239191A1 · Jul 27, 2023

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