Technique for configuring preamble in wireless communication system
An example according to the present specification relates to a technique relating to a configuration of a preamble in a wireless LAN (WLAN) system. A transmitting STA may generate and transmit an EHT PPDU. The EHT PPDU may include an L-SIG field, an RL-SIG field, and a control field. A result of “modulo 3 operation” to a length field value of the L-SIG field may be set to “0”. The RL-SIG field may be configured the same as the L-SIG field. The control field may include 3-bit information relating to a version of a PPDU.
1. A method performed by a transmitting station (STA) in a Wireless Local Area Network (WLAN) system, the method comprising:
generating an Extreme High Throughput Physical Protocol Data Unit (EHT PPDU) including a legacy signal (L-SIG) field, a repeated L-SIG (RL-SIG) field, a control field, and an EHT signal (EHT-SIG) field,
wherein a length field included in the L-SIG field of the EHT PPDU is set to a value satisfying a condition that a remainder is zero when a value of the length field is divided by three (3),
wherein the RL-SIG field is a repeat of the L-SIG field,
wherein the control field includes 3-bit information related to a physical (PHY) version of a PPDU,
wherein the control field has a length of two symbols,
wherein the EHT-SIG field is contiguous to the control field, and
wherein the control field includes first information related to a basic service set (BSS) color having a length of 6 bits, and second information related to a Transmission Opportunity (TXOP) having a length of 7 bits; and
transmitting the EHT PPDU.
2. The method of claim 1 , wherein each of the L-SIG field and the RL-SIG field is modulated based on Binary Phase Shift Keying (BPSK).
3. The method of claim 1 , wherein the L-SIG field and the RL-SIG field include same information field.
4. The method of claim 1 , wherein the 3-bit information related to the PHY version of the PPDU includes information representing that the PPDU is an PPDU of an EHT standard.
5. The method of claim 1 , wherein the length field is set based on a transmission time of the EHT PPDU.
6. The method of claim 1 , wherein the control field is a Universal Signal (U-SIG) field.
7. A method performed by a receiving station (STA) in a Wireless Local Area Network (WLAN) system, the method comprising:
receiving an Extreme High Throughput Physical Protocol Data Unit (EHT PPDU),
wherein the EHT PPDU includes a legacy signal (L-SIG) field, a repeated L-SIG (RL-SIG) field, a control field, and an EHT signal (EHT-SIG) field,
wherein a length field included in the L-SIG field of the EHT PPDU is set to a value satisfying a condition that a remainder is zero when a value of the length field is divided by three (3),
wherein the RL-SIG field is a repeat of the L-SIG field,
wherein the control field includes 3-bit information related to a physical (PHY) version of a PPDU,
wherein the control field has a length of two symbols,
wherein the EHT-SIG field is contiguous to the control field, and
wherein the control field includes first information related to a basic service set (BSS) color having a length of 6 bits, and second information related to a Transmission Opportunity (TXOP) having a length of 7 bits; and
decoding the EHT PPDU.
8. A transmitting station (STA) in a Wireless Local Area Network (WLAN) system, comprising:
a transceiver configured to transmit and/or receive a wireless signal; and
a processor coupled to the transceiver,
wherein the processor is configured to:
generate an Extreme High Throughput Physical Protocol Data Unit (EHT PPDU) including a legacy signal (L-SIG) field, a repeated L-SIG (RL-SIG) field, a control field, and an EHT signal (EHT-SIG) field,
wherein a length field included in the L-SIG field of the EHT PPDU is set to a value satisfying a condition that a remainder is zero when a value of the length field is divided by three (3),
wherein the RL-SIG field is a repeat of the L-SIG field,
wherein the control field includes 3-bit information related to a physical (PHY) version of a PPDU,
wherein the control field has a length of two symbols, and
wherein the EHT-SIG field is contiguous to the control field, and
wherein the control field includes first information related to a basic service set (BSS) color having a length of 6 bits, and second information related to a Transmission Opportunity (TXOP) having a length of 7 bits, and
transmit the EHT PPDU.
9. The transmitting STA of claim 8 , wherein the L-SIG field and the RL-SIG field include same information field.
10. The transmitting STA of claim 8 , wherein the 3-bit information related to the PHY version of the PPDU includes information representing that the PPDU is an PPDU of an EHT standard.
11. The transmitting STA of claim 8 , wherein the length field is set based on a transmission time of the EHT PPDU.
12. The transmitting STA of claim 8 , wherein the control field is a Universal Signal (U-SIG) field.