Configuration of frame format for extended range transmission

A station (STA), comprising:

• at least one processor;
• and
• at least one computer memory operatively connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising
• generating an Enhanced Long Range (ELR) physical protocol data unit (PPDU);
• and
• transmitting the ELR PPDU,
• wherein the ELR PPDU includes a legacy signal (L-SIG) field, a repeated L-SIG (RL-SIG) which is a repeat of the L-SIG field, and a universal signal (U-SIG) field which includes information necessary for interpreting the ELR PPDU,
• wherein the L-SIG field, the RL-SIG field, and the U-SIG field are generated based on a first subcarrier frequency spacing,
• wherein the ELR PPDU further includes a short training field (STF), a long training field (LTF), an ELR signal (ELR-SIG) field, and a data field,
• wherein the STF, the LTF, the ELR-SIG field, and the data field are generated based on a second subcarrier frequency spacing,
• wherein the ELR-SIG field is transmitted through four 52-tone resource units (RUs) duplicated in units of 52-tone RUs in frequency domain.

A method, comprising;

• receiving, by a station (STA), an Enhanced Long Range (ELR) physical protocol data unit (PPDU),
• wherein the ELR PPDU includes a legacy signal (L-SIG) field, a repeated L-SIG (RL-SIG) which is a repeat of the L-SIG field, and a universal signal (U-SIG) field which includes information necessary for interpreting the ELR PPDU,
• wherein the L-SIG field, the RL-SIG field, and the U-SIG field are generated based on a first subcarrier frequency spacing,
• wherein the ELR PPDU further includes a short training field (STF), a long training field (LTF), an ELR signal (ELR-SIG) field, and a data field,
• wherein the STF, the LTF, the ELR-SIG field, and the data field are generated based on a second subcarrier frequency spacing,
• wherein the ELR-SIG field is received through four 52-tone resource units (RUs) duplicated in units of 52-tone RUs in frequency domain;
• and
• decoding the ELR PPDU based on the U-SIG field and/or the EHT-SIG field.