Method and device for receiving PPDU through broadband in wireless LAN system
Presented are a method and a device for receiving a PPDU in a wireless LAN system. Particularly, a receiving STA receives a PPDU from a transmitting STA through a broadband, and decodes the PPDU. The PPDU includes a legacy preamble and first and second signal fields. The legacy preamble and the first and second signal fields are generated on the basis of a first phase rotation value. The first phase rotation value is acquired on the basis of a first preamble puncturing pattern of the broadband. The first preamble puncturing pattern includes the pattern in which 40 MHz or 80 MHz band is punctured in the broadband, when the broadband is a 320 MHz band. The first phase rotation value is [1 −1 −1 −1 1 −1 −1 −1 −1 1 1 1 −1 1 1 1].
1. A method 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; and
decoding, by the receiving STA, the PPDU,
wherein the PPDU includes a legacy-short training field (L-STF), a legacy-long training field (L-LTF), a legacy-signal (L-SIG), a repeated legacy-signal (RL-SIG), a universal-signal, (U-SIG), an extremely high throughput-signal (EHT-SIG), an EHT-STF, an EHT-LTF and a data field,
wherein a bandwidth of the PPDU is 320 MHz, and a first preamble puncturing pattern in which a 40 MHz or 80 MHz band is punctured in the bandwidth of the PPDU is defined,
wherein a first phase rotation value is applied for the L-STF, the L-LTF, the L-SIG, the RL-SIG, the U-SIG and the EHT-SIG,
wherein the first phase rotation value is [1 −1 −1 −1 1 −1 −1 −1 −1 1 1 1 −1 1 1 1],
wherein the bandwidth of the PPDU includes first to fourth 80 MHz bands,
wherein the first preamble puncturing pattern includes first to eighth patterns,
wherein the first pattern is a pattern in which a 40 MHz band within the first 80 MHz band in the bandwidth of the PPDU is punctured,
wherein the second pattern is a pattern in which a 40 MHz band within the second 80 MHz band in the bandwidth of the PPDU is punctured,
wherein the third pattern is a pattern in which a 40 MHz band within the third 80 MHz band in the bandwidth of the PPDU is punctured,
wherein the fourth pattern is a pattern in which a 40 MHz band within the fourth 80 MHz band in the bandwidth of the PPDU is punctured,
wherein the fifth pattern is a pattern in which the first 80 MHz band is punctured in the bandwidth of the PPDU,
wherein the sixth pattern is a pattern in which the second 80 MHz band is punctured in the bandwidth of the PPDU,
wherein the seventh pattern is a pattern in which the third 80 MHz band is punctured in the bandwidth of the PPDU, and
wherein the eighth pattern is a pattern in which the fourth 80 MHz band is punctured in the bandwidth of the PPDU.
2. The method of claim 1 , wherein one element of the first phase rotation value is a phase rotation value applied to each 20 MHz band of the 320 MHz band,
wherein the 320 MHz band consists of subcarriers having subcarrier indexes from −512 to 511,
wherein a first 1 of the first phase rotation values is applied to subcarriers having a subcarrier index of −512 to −449,
wherein a second −1 of the first phase rotation value is applied to subcarriers having a subcarrier index of −448 to −385,
wherein a third −1 of the first phase rotation value is applied to subcarriers having subcarrier indices from −384 to −321,
wherein a fourth −1 of the first phase rotation value is applied to subcarriers having subcarrier indexes from −320 to −257,
wherein a fifth 1 of the first phase rotation values is applied to a subcarrier having a subcarrier index of −256 to −193,
wherein a sixth −1 of the first phase rotation values is applied to subcarriers having subcarrier indices from −192 to −129,
wherein a seventh −1 of the first phase rotation values is applied to subcarriers having a subcarrier index of −128 to −65,
wherein an eighth −1 of the first phase rotation values is applied to subcarriers having a subcarrier index of −64 to −1,
wherein a ninth −1 of the first phase rotation values is applied to subcarriers having subcarrier indexes from 0 to 63,
wherein a tenth 1 of the first phase rotation values is applied to subcarriers having subcarrier indexes from 64 to 127,
wherein an eleventh 1 of the first phase rotation values is applied to subcarriers having subcarrier indexes from 128 to 191,
wherein a twelfth 1 of the first phase rotation values is applied to subcarriers having a subcarrier index of 192 to 255,
wherein a thirteenth −1 among the first phase rotation values is applied to subcarriers having subcarrier indices from 256 to 319,
wherein a fourteenth 1 of the first phase rotation values is applied to subcarriers having subcarrier indices from 320 to 383,
wherein a fifteenth 1 of the first phase rotation values is applied to subcarriers having subcarrier indices from 384 to 447,
wherein a sixteenth 1 of the first phase rotation values is applied to subcarriers having subcarrier indices 448 to 511.
3. The method of claim 1 ,
wherein the first phase rotation value is based on a second phase rotation value and a third phase rotation value,
wherein the second phase rotation value is a phase rotation value in which a phase rotation value for the 80 MHz band defined in an 802.11ax wireless LAN system is repeated,
wherein the third phase rotation value is a phase rotation value defined in units of 80 MHz bands to obtain an optimal Peak-to-Average Power Ratio (PAPR) of the L-STF and the L-LTF.
4. The method of claim 3 ,
wherein the second phase rotation value is [1 −1 −1 −1 1 −1 −1 −1 1 −1 −1 −1 1 −1 −1 −1],
wherein the third phase rotation value is [1 1 −1 −1],
wherein the first phase rotation value is based on a product of the second phase rotation value and the third phase rotation value.
5. The method of claim 4 ,
wherein a first 1 of the third phase rotation values is applied to the first 80 MHz band,
wherein a second 1 of the third phase rotation values is applied to the second 80 MHz band,
wherein a third −1 of the third phase rotation value is applied to the third 80 MHz band,
wherein a fourth −1 of the third phase rotation value is applied to the fourth 80 MHz band.
6. The method of claim 1 ,
wherein
the U-SIG includes information on the first preamble puncturing pattern.
7. A receiving station (STA) in a wireless local area network (WLAN) system, the receiving STA comprising:
a memory;
a transceiver; and
a processor being operatively connected to the memory and the transceiver,
wherein the processor is configured to:
receive a Physical Protocol Data Unit (PPDU) from a transmitting station (STA), and
decode the PPDU,
wherein the PPDU includes a legacy-short training field (L-STF), a legacy-long training field (L-LTF), a legacy-signal (L-SIG), a repeated legacy-signal (RL-SIG), a universal-signal, (U-SIG), an extremely high throughput-signal (EHT-SIG), an EHT-STE, an EHT-LTF and a data field,
wherein a bandwidth of the PPDU is 320 MHz, and a first preamble puncturing pattern in which a 40 MHz or 80 MHz band is punctured in the bandwidth of the PPDU is defined,
wherein a first phase rotation value is applied for the L-STF, the L-LTF, the L-SIG, the RL-SIG, the U-SIG and the EHT-SIG,
wherein the first phase rotation value is [1 −1 −1 −1 1 −1 −1 −1 −1 1 1 1 −1 1 1 1],
wherein the bandwidth of the PPDU includes first to fourth 80 MHz bands,
wherein the first preamble puncturing pattern includes first to eighth patterns,
wherein the first pattern is a pattern in which a 40 MHz band within the first 80 MHz band in the bandwidth of the PPDU is punctured,
wherein the second pattern is a pattern in which a 40 MHz band within the second 80 MHz band in the bandwidth of the PPDU is punctured,
wherein the third pattern is a pattern in which a 40 MHz band within the third 80 MHZ band in the bandwidth of the PPDU is punctured,
wherein the fourth pattern is a pattern in which a 40 MHz band within the fourth 80 MHz band in the bandwidth of the PPDU is punctured,
wherein the fifth pattern is a pattern in which the first 80 MHz band is punctured in the bandwidth of the PPDU,
wherein the sixth pattern is a pattern in which the second 80 MHz band is punctured in the bandwidth of the PPDU,
wherein the seventh pattern is a pattern in which the third 80 MHz band is punctured in the bandwidth of the PPDU, and
wherein the eighth pattern is a pattern in which the fourth 80 MHz band is punctured in the bandwidth of the PPDU.
8. A method 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,
wherein the PPDU includes a legacy-short training field (L-STF), a legacy-long training field (L-LTF), a legacy-signal (L-SIG), a repeated legacy-signal (RL-SIG), a universal-signal, (U-SIG), an extremely high throughput-signal (EHT-SIG), an EHT-STF, an EHT-LTF and a data field,
wherein a bandwidth of the PPDU is 320 MHz, and a first preamble puncturing pattern in which a 40 MHz or 80 MHz band is punctured in the bandwidth of the PPDU is defined,
wherein a first phase rotation value is applied for the L-STF, the L-LTF, the L-SIG, the RL-SIG, the U-SIG and the EHT-SIG,
wherein the first phase rotation value is [1 −1 −1 −1 1 −1 −1 −1 −1 1 1 1 −1 1 1 1],
wherein the bandwidth of the PPDU includes first to fourth 80 MHz bands,
wherein the first preamble puncturing pattern includes first to eighth patterns,
wherein the first pattern is a pattern in which a 40 MHz band within the first 80 MHz band in the bandwidth of the PPDU is punctured,
wherein the second pattern is a pattern in which a 40 MHz band within the second 80 MHz band in the bandwidth of the PPDU is punctured,
wherein the third pattern is a pattern in which a 40 MHz band within the third 80 MHz band in the bandwidth of the PPDU is punctured,
wherein the fourth pattern is a pattern in which a 40 MHz band within the fourth 80 MHz band in the bandwidth of the PPDU is punctured,
wherein the fifth pattern is a pattern in which the first 80 MHz band is punctured in the bandwidth of the PPDU,
wherein the sixth pattern is a pattern in which the second 80 MHz band is punctured in the bandwidth of the PPDU,
wherein the seventh pattern is a pattern in which the third 80 MHz band is punctured in the bandwidth of the PPDU, and
wherein the eighth pattern is a pattern in which the fourth 80 MHz band is punctured in the bandwidth of the PPDU.
9. The method of claim 8 ,
wherein one element of the first phase rotation value is a phase rotation value applied to each 20 MHz band of the 320 MHz band,
wherein the 320 MHz band consists of subcarriers having subcarrier indexes from −512 to 511,
wherein a first 1 of the first phase rotation values is applied to subcarriers having a subcarrier index of −512 to −449,
wherein a second −1 of the first phase rotation value is applied to subcarriers having a subcarrier index of −448 to −385,
wherein a third −1 of the first phase rotation value is applied to subcarriers having subcarrier indices from −384 to −321,
wherein a fourth −1 of the first phase rotation value is applied to subcarriers having subcarrier indexes from −320 to −257,
wherein a fifth 1 of the first phase rotation values is applied to a subcarrier having a subcarrier index of −256 to −193,
wherein a sixth −1 of the first phase rotation values is applied to subcarriers having subcarrier indices from −192 to −129,
wherein a seventh −1 of the first phase rotation values is applied to subcarriers having a subcarrier index of −128 to −65,
wherein an eighth −1 of the first phase rotation values is applied to subcarriers having a subcarrier index of −64 to −1,
wherein a ninth −1 of the first phase rotation values is applied to subcarriers having subcarrier indexes from 0 to 63,
wherein a tenth 1 of the first phase rotation values is applied to subcarriers having subcarrier indexes from 64 to 127,
wherein an eleventh 1 of the first phase rotation values is applied to subcarriers having subcarrier indexes from 128 to 191,
wherein a twelfth 1 of the first phase rotation values is applied to subcarriers having a subcarrier index of 192 to 255,
wherein a thirteenth −1 among the first phase rotation values is applied to subcarriers having subcarrier indices from 256 to 319,
wherein a fourteenth 1 of the first phase rotation values is applied to subcarriers having subcarrier indices from 320 to 383,
wherein a fifteenth 1 of the first phase rotation values is applied to subcarriers having subcarrier indices from 384 to 447,
wherein a sixteenth 1 of the first phase rotation values is applied to subcarriers having subcarrier indices 448 to 511.
10. The method of claim 8 ,
wherein the first phase rotation value is based on a second phase rotation value and a third phase rotation value,
wherein the second phase rotation value is a phase rotation value in which a phase rotation value for the 80 MHz band defined in an 802.11ax wireless LAN system is repeated,
wherein the third phase rotation value is a phase rotation value defined in units of 80 MHz bands to obtain an optimal Peak-to-Average Power Ratio (PAPR) of the L-STF and the L-LTF.
11. The method of claim 10 ,
wherein the second phase rotation value is [1 −1 −1 −1 1 −1 −1 −1 1 −1 −1 −1 1 −1 −1 −1],
wherein the third phase rotation value is [1 1 −1 −1],
wherein the first phase rotation value is based on a product of the second phase rotation value and the third phase rotation value.
12. The method of claim 11 ,
wherein a first 1 of the third phase rotation values is applied to the first 80 MHz band,
wherein a second 1 of the third phase rotation values is applied to the second 80 MHZ band,
wherein a third −1 of the third phase rotation value is applied to the third 80 MHz band,
wherein a fourth −1 of the third phase rotation value is applied to the fourth 80 MHz band.
13. The method of claim 8 ,
wherein
the U-SIG includes information on the first preamble puncturing pattern.
14. A transmitting station (STA) in a wireless local area network (WLAN) system, the transmitting STA comprising:
a memory;
a transceiver; and
a processor being operatively connected to the memory and the transceiver,
wherein the processor is configured to:
generate a Physical Protocol Data Unit (PPDU); and
transmit the PPDU to a receiving STA,
wherein the PPDU includes a legacy-short training field (L-STF), a legacy-long training field (L-LTF), a legacy-signal (L-SIG), a repeated legacy-signal (RL-SIG), a universal-signal, (U-SIG), an extremely high throughput-signal (EHT-SIG), an EHT-STF, an EHT-LTF and a data field,
wherein a bandwidth of the PPDU is 320 MHz, and a first preamble puncturing pattern in which a 40 MHz or 80 MHz band is punctured in the bandwidth of the PPDU is defined,
wherein a first phase rotation value is applied for the L-STF, the L-LTF, the L-SIG, the RL-SIG, the U-SIG and the EHT-SIG,
wherein the first phase rotation value is [1 −1 −1 −1 1 −1 −1 −1 −1 1 1 1 −1 1 1 1],
wherein the bandwidth of the PPDU includes first to fourth 80 MHz bands,
wherein the first preamble puncturing pattern includes first to eighth patterns,
wherein the first pattern is a pattern in which a 40 MHz band within the first 80 MHz band in the bandwidth of the PPDU is punctured,
wherein the second pattern is a pattern in which a 40 MHz band within the second 80 MHz band in the bandwidth of the PPDU is punctured,
wherein the third pattern is a pattern in which a 40 MHz band within the third 80 MHZ band in the bandwidth of the PPDU is punctured,
wherein the fourth pattern is a pattern in which a 40 MHz band within the fourth 80 MHz band in the bandwidth of the PPDU is punctured,
wherein the fifth pattern is a pattern in which the first 80 MHz band is punctured in the bandwidth of the PPDU,
wherein the sixth pattern is a pattern in which the second 80 MHz band is punctured in the bandwidth of the PPDU,
wherein the seventh pattern is a pattern in which the third 80 MHz band is punctured in the bandwidth of the PPDU, and
wherein the eighth pattern is a pattern in which the fourth 80 MHz band is punctured in the bandwidth of the PPDU.