Technique for configuring preamble in wireless communication system
According to various embodiments, a reception STA may receive a physical layer protocol data unit (PPDU) including a first signal field, a second signal field, and a data field. The PPDU may be configured to be transmitted to a single user. The second signal field may consist of one content channel, and the one content channel may be duplicated in a first bandwidth in units of a second bandwidth.
1. A method in a receiving station (STA) in a wireless local area network (WLAN), the method comprising:
receiving an Extremely High Throughput Physical Protocol Data Unit (EHT PPDU) including a legacy signal (L-SIG) field, a repeated legacy signal (RL-SIG) field, a universal signal (U-SIG) field, an EHT signal (EHT-SIG) field, and a data field,
wherein a length field of the L-SIG field includes a value,
wherein the value satisfies a condition that a remainder is zero (0) when the length field is divided by three (3), and the remainder is used to differentiate the EHT PPDU from a High Efficiency (HE) PPDU,
wherein four extra subcarriers are for the RL-SIG field, indices of the four extra subcarriers are {−28, −27, +27, +28}, values of the four extra subcarriers are {−1, −1, −1, 1}, respectively, and the RL-SIG field includes 24-bit information,
wherein the U-SIG field includes version independent fields followed by version dependent fields,
wherein the version independent fields include 3-bit information related to a physical (PHY) version of the EHT PPDU,
wherein the version dependent fields include type information related to the EHT PPDU,
wherein the U-SIG field has a length of two symbols,
wherein the U-SIG field is allocated to a plurality of subcarriers with indices from −28 to +28, the plurality of subcarriers include four pilot subcarriers, and indices of the four pilot subcarriers are {−21, −7, +7, +21},
wherein the EHT-SIG field is contiguous to the U-SIG field,
wherein based on the EHT PPDU being related to single user (SU) transmission, the EHT-SIG field has a single EHT-SIG content channel regardless of a bandwidth of the EHT PPDU,
wherein information on preamble puncturing for the PPDU within 80 MHz is indicated as [x1 x2 x3 x4], each of x1, x2, x3, and x4 includes information related to preamble puncturing on a corresponding 20 MHz channel, each of x1, x2, x3, and x4 has a value of zero (0) for a corresponding 20 MHz channel being punctured, and the information on the preamble puncturing is included in the U-SIG field;
and
decoding the PPDU based on the U-SIG field and the EHT-SIG field.
2. The method of claim 1 , wherein the type information has a length of two bits.
3. The method of claim 1 , wherein the EHT-SIG field includes a common field and a user specific field.
4. The method of claim 1 , wherein the EHT-SIG field has a length of at least one symbol.
5. A method in a transmitting station (STA) in a wireless local area network (WLAN), the method comprising:
generating an Extremely High Throughput Physical Protocol Data Unit (EHT PPDU) including a legacy signal (L-SIG) field, a repeated legacy signal (RL-SIG) field, a universal signal (U-SIG) field, an EHT signal (EHT-SIG) field, and a data field,
wherein a length field of the L-SIG field includes a value, wherein the value satisfies a condition that a remainder is zero (0) when the length field is divided by three (3), and the remainder is used to differentiate the EHT PPDU from a High Efficiency (HE) PPDU,
wherein four extra subcarriers are for the RL-SIG field, indices of the four extra subcarriers are {−28, −27, +27, +28}, values of the four extra subcarriers are {−1, −1, −1, 1}, respectively, and the RL-SIG field includes 24-bit information, wherein the U-SIG field includes version independent fields followed by version dependent fields,
wherein the version independent fields include 3-bit information related to a physical (PHY) version of the EHT PPDU,
wherein the version dependent fields include type information related to the EHT PPDU,
wherein the U-SIG field has a length of two symbols,
wherein the U-SIG field is allocated to a plurality of subcarriers with indices from −28 to +28, the plurality of subcarriers include four pilot subcarriers, and indices of the four pilot subcarriers are {−21, −7, +7, +21},
wherein the EHT-SIG field is contiguous to the U-SIG field,
wherein based on the EHT PPDU being related to single user (SU) transmission, the EHT-SIG field has a single EHT-SIG content channel regardless of a bandwidth of the EHT PPDU,
wherein information for the PPDU within 80 MHz is indicated as [x1 x2 x3 x4], each of x1, x2, x3, and x4 includes information related to preamble puncturing on a corresponding 20 MHz channel, each of x1, x2, x3, and x4 has a value of zero (0) for a corresponding 20 MHz channel being punctured, and the information on the preamble puncturing is included in the U-SIG field; and
transmitting the PPDU.
6. The method of claim 5 , wherein the type information has a length of two bits.
7. The method of claim 5 , wherein the EHT-SIG field includes a common field and a user specific field.
8. The method of claim 5 , wherein the EHT-SIG field has a length of at least one symbol.
9. A receiving station (STA) in a wireless local area network (WLAN), comprising:
a transceiver adapted to transmit and/or receive a wireless signal;
a processor coupled to the transceiver,
wherein the processor is adapted to:
receive an Extremely High Throughput Physical Protocol Data Unit (EHT PPDU) including a legacy signal (L-SIG) field, a repeated legacy signal (RL-SIG) field, a universal signal (U-SIG) field, an EHT signal (EHT-SIG) field, and a data field,
wherein a length field of the L-SIG field includes a value,
wherein the value satisfies a condition that a remainder is zero (0) when the length field is divided by three (3), and the remainder is used to differentiate the EHT PPDU from a High Efficiency (HE) PPDU,
wherein four extra subcarriers are for the RL-SIG field, indices of the four extra subcarriers are {−28, −27, +27, +28}, values of the four extra subcarriers are {−1, −1, −1, 1}, respectively, and the RL-SIG field includes 24-bit information, wherein the U-SIG field includes version independent fields followed by version dependent fields,
wherein the version independent fields include 3-bit information related to a physical (PHY) version of the EHT PPDU,
wherein the version dependent fields include type information related to the EHT PPDU,
wherein the U-SIG field has a length of two symbols,
wherein the U-SIG field is allocated to a plurality of subcarriers with indices from −28 to +28, the plurality of subcarriers include four pilot subcarriers, and indices of the four pilot subcarriers are {−21,−7, +7, +21},
wherein the EHT-SIG field is contiguous to the U-SIG field,
wherein based on the EHT PPDU being related to single user (SU) transmission, the EHT-SIG field has a single EHT-SIG content channel regardless of a bandwidth of the EHT PPDU,
wherein information on preamble puncturing for the PPDU within 80 MHz is indicated as [x1 x2 x3 x4], each of x1, x2, x3, and x4 includes information related to preamble puncturing on a corresponding 20 MHz channel, each of x1, x2, x3, and x4 has a value of zero (0) for a corresponding 20 MHz channel being punctured, and the information on the preamble puncturing is included in the U-SIG field; and
decode the PPDU based on the U-SIG field and the EHT-SIG field.
10. The receiving STA of claim 9 , wherein the type information has a length of two bits.
11. The receiving STA of claim 9 , wherein the EHT-SIG field includes a common field and a user specific field.
12. The receiving STA of claim 9 , wherein the EHT-SIG field has a length of at least one symbol.