Transmission and reception method for PPDU including ER preamble, and device using same method
The present disclosure proposes a transmission and reception method for a PPDU, which is applicable in a next-generation wireless LAN system. According to an embodiment of the present disclosure, proposed is a method for notifying, via a bandwidth field of a PPDU including an ER preamble, a transmission method being applied to the PPDU. According to another embodiment of the present disclosure, proposed is a method in which transmission methods being applied to a PPDU including an ER preamble are different from each other according to a value indicated by a bandwidth field of the PPDU.
1. A method used in a wireless local area network (WLAN) system, the method comprising:
generating, by a transmitting station (STA), a physical protocol data unit (PPDU) comprising an extended range (ER) preamble,
wherein the ER preamble includes a first universal signal (U-SIG) field, a second U-SIG field, a third U-SIG field, and a fourth U-SIG field,
wherein the first U-SIG field includes a bandwidth field,
wherein based on the bandwidth field indicating zero (0), a resource unit (RU) used for transmission of the PPDU is set to a 106-tone RU, and the PPDU is transmitted based on a single user (SU) transmission,
wherein based on the bandwidth field indicating one (1), an RU used for the transmission of the PPDU is set to a 242-tone RU, and the PPDU is transmitted based on the SU transmission,
wherein based on the bandwidth field indicating two (2), a bandwidth used for transmission of the PPDU is set to 80 MHz, and the PPDU is transmitted based on a duplication (DUP) transmission in units of a 484-tone RU,
wherein based on the bandwidth field indicating three (3), a bandwidth used for transmission of the PPDU is set to 160 MHz, and the PPDU is transmitted based on a DUP transmission in units of a 996-tone RU,
wherein based on the bandwidth field indicating four (4), a bandwidth used for transmission of the PPDU is set to 320 MHz-1, and the PPDU is transmitted based on a DUP transmission in units of a 2*996-tone RU,
wherein based on the bandwidth field indicating five (5), a bandwidth used for transmission of the PPDU is set to 320 MHz-2, and the PPDU is transmitted based on a DUP transmission in units of a 2*996-ton RU; and
transmitting, by the transmitting STA, the PPDU to a receiving STA.
2. The method of claim 1 , wherein the bandwidth field is located in fourth through sixth bits of the first U-SIG field.
3. The method of claim 1 , wherein the DUP transmission is a transmission in which data transmitted in a payload portion of the PPDU is duplicated in frequency.
4. The method of claim 1 , wherein the first U-SIG field includes first coded bits same as the second U-SIG field, and the third U-SIG field includes second coded bits same as the fourth U-SIG field,
wherein the second U-SIG field is configured based on Quadrature-Binary Phase Shift Keying (Q-BPSK) modulation.
5. The method of claim 1 , wherein the PPDU includes an Extremely High Throughput-signal (EHT-SIG) field,
wherein based on the PPDU being transmitted based on the DUP transmission, a Modulation and Coding Scheme (MCS) subfield of a User field in the EHT-SIG field is set to fourteen (14).
6. The method of claim 1 , wherein each of the first U-SIG field, the second U-SIG field, the third U-SIG field, and the fourth U-SIG field has a length of one Orthogonal Frequency Division Multiplexing (OFDM) symbol.
7. A transmitting station (STA) in a wireless local area network (WLAN) system, comprising:
a transceiver transmitting and/or receiving a wireless signal; and
a processor controlling the transceiver,
wherein the processor is adapted to:
generate a physical protocol data unit (PPDU) comprising an extended range (ER) preamble,
wherein the ER preamble includes a first universal signal (U-SIG) field, a second U-SIG field, a third U-SIG field, and a fourth U-SIG field,
wherein the first U-SIG field includes a bandwidth field,
wherein based on the bandwidth field indicating zero (0), a resource unit (RU) used for transmission of the PPDU is set to a 106-tone RU, and the PPDU is transmitted based on a single user (SU) transmission,
wherein based on the bandwidth field indicating one (1), an RU used for the transmission of the PPDU is set to a 242-tone RU, and the PPDU is transmitted based on the SU transmission,
wherein based on the bandwidth field indicating two (2), a bandwidth used for transmission of the PPDU is set to 80 MHz, and the PPDU is transmitted based on a duplication (DUP) transmission in units of a 484-tone RU,
wherein based on the bandwidth field indicating three (3), a bandwidth used for transmission of the PPDU is set to 160 MHz, and the PPDU is transmitted based on a DUP transmission in units of a 996-tone RU,
wherein based on the bandwidth field indicating four (4), a bandwidth used for transmission of the PPDU is set to 320 MHz-1, and the PPDU is transmitted based on a DUP transmission in units of a 2*996-tone RU,
wherein based on the bandwidth field indicating five (5), a bandwidth used for transmission of the PPDU is set to 320 MHz-2, and the PPDU is transmitted based on a DUP transmission in units of a 2*996-ton RU; and
transmit the PPDU to a receiving STA.
8. A method used in a wireless local area network (WLAN) system, the method comprising:
receiving, by a receiving station (STA), a physical protocol data unit (PPDU) comprising an extended range (ER) preamble from a transmitting STA; and
decoding, by the receiving STA, the PPDU,
wherein the ER preamble includes a first universal signal (U-SIG) field, a second U-SIG field, a third U-SIG field, and a fourth U-SIG field,
wherein the first U-SIG field includes a bandwidth field,
wherein based on the bandwidth field indicating zero (0), a resource unit (RU) used for transmission of the PPDU is set to a 106-tone RU, and the PPDU is transmitted based on a single user (SU) transmission,
wherein based on the bandwidth field indicating one (1), an RU used for the transmission of the PPDU is set to a 242-tone RU, and the PPDU is transmitted based on the SU transmission,
wherein based on the bandwidth field indicating two (2), a bandwidth used for transmission of the PPDU is set to 80 MHz, and the PPDU is transmitted based on a duplication (DUP) transmission in units of a 484-tone RU,
wherein based on the bandwidth field indicating three (3), a bandwidth used for transmission of the PPDU is set to 160 MHz, and the PPDU is transmitted based on a DUP transmission in units of a 996-tone RU,
wherein based on the bandwidth field indicating four (4), a bandwidth used for transmission of the PPDU is set to 320 MHz-1, and the PPDU is transmitted based on a DUP transmission in units of a 2*996-tone RU,
wherein based on the bandwidth field indicating five (5), a bandwidth used for transmission of the PPDU is set to 320 MHz-2, and the PPDU is transmitted based on a DUP transmission in units of a 2*996-ton RU.
9. The method of claim 8 , wherein the bandwidth field is located in fourth through sixth bits of the first U-SIG field.
10. The method of claim 8 , wherein the DUP transmission is a transmission in which data transmitted in a payload portion of the PPDU is duplicated in frequency.
11. The method of claim 8 , wherein the first U-SIG field includes first coded bits same as the second U-SIG field, and the third U-SIG field includes second coded bits same as the fourth U-SIG field,
wherein the second U-SIG field is configured based on Quadrature-Binary Phase Shift Keying (Q-BPSK) modulation.
12. The method of claim 8 , wherein the PPDU includes an Extremely High Throughput-signal (EHT-SIG) field,
wherein based on the PPDU being transmitted based on the DUP transmission, a Modulation and Coding Scheme (MCS) subfield of a User field in the EHT-SIG field is set to fourteen (14).
13. The method of claim 8 , wherein each of the first U-SIG field, the second U-SIG field, the third U-SIG field, and the fourth U-SIG field has a length of one Orthogonal Frequency Division Multiplexing (OFDM) symbol.