Method and device for indicating preamble puncturing pattern in A-PPDU in wireless LAN system

A receiving station (STA) in a Wireless Local Area Network (WLAN) system, the receiving STA comprising:

• a memory;
• a transceiver;
• and
• a processor operatively coupled to the memory and transceiver,
• wherein processor is configured to:
• receive an Aggregated-Physical Protocol Data Unit (A-PPDU) from a transmitting STA;
• and
• decode the A-PPDU,
• wherein the A-PPDU includes a first PPDU for a primary 160 MHz channel and a second PPDU for a secondary 160 MHz channel,
• wherein the first PPDU includes a first legacy preamble, a High Efficiency-Short Training Field (HE-STF), a High Efficiency-Long Training Field (HE-LTF), a first signal field and first data,
• wherein the second PPDU includes a second legacy preamble, an Extremely High Throughput-Signal (EHT-SIG), an EHT-STF, an EHT-LTF, a second signal field and second data,
• wherein the first signal field includes information on a bandwidth through which the first PPDU is transmitted,
• wherein the information on the bandwidth through which the first PPDU is transmitted includes information on a first preamble puncturing pattern punctured in units of 20 MHz channels in the primary 160 MHz channel,
• wherein the second signal field includes information on a second preamble puncturing pattern,
• wherein the information on the second preamble puncturing pattern includes information on a third preamble puncturing pattern punctured in units of 20 MHz channels in each 80 MHz channel of the secondary 160 MHz channel based on the second PPDU being transmitted in an Orthogonal Frequency Division Multiple Access (OFDMA) scheme, and information on a fourth preamble puncturing pattern punctured in units of 20 MHz or 40 MHz channels in the secondary 160 MHz channel based on the second PPDU being transmitted in a non-OFDMA scheme,
• wherein the first legacy preamble and the first signal field are generated based on a first phase rotation value, and
• wherein the second legacy preamble, the second signal field, and the EHT-SIG are generated based on a second phase rotation value.

A method in a Wireless Local Area Network (WLAN) system, the method comprising:

• generating, by a transmitting station (STA), an Aggregated-Physical Protocol Data Unit (A-PPDU);
• and
• transmitting, by the transmitting STA, the A-PPDU to a receiving STA,
• wherein the A-PPDU includes a first PPDU for a primary 160 MHz channel and a second PPDU for a secondary 160 MHz channel,
• wherein the first PPDU includes a first legacy preamble, a High Efficiency-Short Training Field (HE-STF), a High Efficiency-Long Training Field (HE-LTF), a first signal field and first data,
• wherein the second PPDU includes a second legacy preamble, an Extremely High Throughput-Signal (EHT-SIG), an EHT-STF, an EHT-LTF, a second signal field and second data,
• wherein the first signal field includes information on a bandwidth through which the first PPDU is transmitted,
• wherein the information on the bandwidth through which the first PPDU is transmitted includes information on a first preamble puncturing pattern punctured in units of 20 MHz channels in the primary 160 MHz channel,
• wherein the second signal held includes information on a second preamble puncturing pattern,
• wherein the information on the second preamble puncturing pattern includes information on a third preamble puncturing pattern punctured in units of 20 MHz channels in each 80 MHz channel of the secondary 160 MHz channel based on the second PPDU being transmitted in an Orthogonal Frequency Division Multiple Access (OFDMA) scheme, and information on a fourth preamble puncturing pattern punctured in units of 20 MHz or 40 MHz channels in the secondary 160 MHz channel based on the second PPDU being transmitted in a non-OFDMA scheme,
• wherein the first legacy preamble and the first signal field are generated based on a first phase rotation value, and
• wherein the second legacy preamble, the second signal field, and the EHT-SIG are generated based on a second phase rotation value.