Patent ID: 11943751
Assignee: LG ELECTRONICS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A receiving station (STA) in a wireless local area network (WLAN) system, the receiving STA comprises,
a transceiver for transmitting and receiving radio signals; and
a processor being operably coupled to the transceiver,
wherein the processor is configured to:
control the transceiver to receive a physical protocol data unit (PPDU),
wherein the PPDU includes a legacy signal (L-SIG) field, a repeated L-SIG (RL-SIG) field which is a repeat of the L-SIG field, and a Universal Signal (U-SIG) field contiguous to the RL-SIG field,
wherein the PPDU is an extremely high throughput (EHT) PPDU,
wherein the L-SIG field includes a length field which is set to a value satisfying a condition that a remainder is zero when the length field is divided by three,
wherein the U-SIG field is received through first through fourth symbols,
wherein the first symbol includes a physical version identifier having a length of three bits,
wherein the physical version identifier is set to zero to identify the EHT PPDU,
wherein the second symbol includes information in which bit information of the first symbol is repeated,
wherein the fourth symbol includes information in which bit information of the third symbol is repeated, and
wherein the PPDU is configured based on one of a plurality of transmission modes including a first mode related to an Extended Range (ER) preamble and a second mode related to duplicate transmission; and
determine a transmission mode of the PPDU based on a constellation mapping pattern of the first and second symbols,
wherein the constellation mapping pattern for the first mode has a first mapping pattern, and
wherein the constellation mapping pattern for the second mode has a second mapping pattern.