Configuration of type information for APPDU in wireless LAN system
The present specification proposes a subfield including information relating to whether a transmission physical protocol data unit (PPDU) or a reception PPDU is an aggregated PPDU (APPDU). An example of the present specification is related to at least one subfield included in a universal signal (U-SIG) field of an extremely high throughput (EHT) PPDU. A value of the at least one subfield proposed in the present specification comprises information relating to whether a PPDU is an APPDU or a conventional PPDU. A reception STA may identify whether a reception PPDU is a conventional PPDU or an APPDU, and normally perform a decoding operation.
1 . A method used in a wireless local area network (WLAN) system, the method comprising:
transmitting allocation information related to a first channel for a High Efficiency (HE) Physical Protocol Data Unit (PPDU) and a second channel for an Extremely High Throughput (EHT) PPDU, wherein the first channel includes a primary channel of a basic service set (BSS) operating channel, and the second channel includes a non-primary channel of the BSS operating channel;
generating a single PPDU including the HE PPDU and the EHT PPDU,
wherein a frequency resource for the HE PPDU within the single PPDU and a frequency resource for the EHT PPDU within the single PPDU are determined based on the allocation information,
wherein the EHT PPDU includes a legacy signal (L-SIG) field, a repeated legacy signal (RL-SIG) field in which the L-SIG field is repeated, and a Universal Signal (U-SIG) field for interpreting the EHT PPDU,
wherein the RL-SIG field is contiguous to the L-SIG field, the U-SIG field is contiguous to the RL-SIG field,
wherein the U-SIG field is transmitted through a first U-SIG symbol and a second U-SIG symbol,
wherein the second U-SIG symbol is configured based on 26-bit control information of bits B 0 to B 25 ,
wherein a value of bit B 2 of the second U-SIG symbol is determined based on whether the single PPDU includes the HE PPDU together with the EHT PPDU; and
transmitting the single PPDU.
2 . The method of claim 1 , wherein the value of bit B 2 of the second U-SIG symbol is set to zero (0) to indicate that the single PPDU includes the HE PPDU together with the EHT PPDU.
3 . The method of claim 1 , wherein the first U-SIG symbol is configured based on 26-bit control information of bits B 0 to B 25 ,
wherein bit B 6 of the first U-SIG symbol includes information related to whether the EHT PPDU is for Uplink (UL) or Downlink (DL).
4 . The method of claim 1 , wherein a value of bit B 6 of the first U-SIG symbol is set to zero (0), a value of bits B 0 and B 1 of the second U-SIG symbol is set to zero (0), and a value of bit B 2 of the second U-SIG symbol is set to zero (0) to indicate that the single PPDU includes the HE PPDU together with the EHT PPDU and the single PPDU is related to an orthogonal frequency division multiple access (OFDMA) transmission,
wherein the value of bit B 6 of the first U-SIG symbol is set to zero (0), the value of bits B 0 and B 1 of the second U-SIG symbol is set to one (1), and the value of bit B 2 of the second U-SIG symbol is set to zero (0) to indicate that the single PPDU includes the HE PPDU together with the EHT PPDU and the single PPDU is related to a single user (SU) transmission,
wherein the value of bit B 6 of the first U-SIG symbol is set to zero (0), the value of bits B 0 and B 1 of the second U-SIG symbol is set to two (2), and the value of bit B 2 of the second U-SIG symbol is set to zero (0) to indicate that the single PPDU includes the HE PPDU together with the EHT PPDU and the single PPDU is related to a non-OFDMA transmission, and
wherein the value of bit B 6 of the first U-SIG symbol is set to one (1), the value of bits B 0 and B 1 of the second U-SIG symbol is set to zero (0), and the value of bit B 2 of the second U-SIG symbol is set to zero (0) to indicate that the single PPDU includes the HE PPDU together with the EHT PPDU and the single PPDU is related to a trigger-based PPDU.
5 . A station configured to operate in a wireless local area network (WLAN) system, the station 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:
transmitting allocation information related to a first channel for a High Efficiency (HE) Physical Protocol Data Unit (PPDU) and a second channel for an Extremely High Throughput (EHT) PPDU, wherein the first channel includes a primary channel of a basic service set (BSS) operating channel, and the second channel includes a non-primary channel of the BSS operating channel;
generating a single PPDU including the HE PPDU and the EHT PPDU,
wherein a frequency resource for the HE PPDU within the single PPDU and a frequency resource for the EHT PPDU within the single PPDU are determined based on the allocation information,
wherein the EHT PPDU includes a legacy signal (L-SIG) field, a repeated legacy signal (RL-SIG) field in which the L-SIG field is repeated, and a Universal Signal (U-SIG) field for interpreting the EHT PPDU,
wherein the RL-SIG field is contiguous to the L-SIG field, the U-SIG field is contiguous to the RL-SIG field,
wherein the U-SIG field is transmitted through a first U-SIG symbol and a second U-SIG symbol,
wherein the second U-SIG symbol is configured based on 26-bit control information of bits B 0 to B 25 ,
wherein a value of bit B 2 of the second U-SIG symbol is determined based on whether the single PPDU includes the HE PPDU together with the EHT PPDU; and
transmitting the single PPDU.
6 . The station of claim 5 , wherein the value of bit B 2 of the second U-SIG symbol is set to zero (0) to indicate that the single PPDU includes the HE PPDU together with the EHT PPDU.
7 . The station of claim 5 , wherein the first U-SIG symbol is configured based on 26-bit control information of bits B 0 to B 25 ,
wherein bit B 6 of the first U-SIG symbol includes information related to whether the EHT PPDU is for Uplink (UL) or Downlink (DL).
8 . The station of claim 5 , wherein a value of bit B 6 of the first U-SIG symbol is set to zero (0), a value of bits B 0 and B 1 of the second U-SIG symbol is set to zero (0), and a value of bit B 2 of the second U-SIG symbol is set to zero (0) to indicate that the single PPDU includes the HE PPDU together with the EHT PPDU and the single PPDU is related to an orthogonal frequency division multiple access (OFDMA) transmission,
wherein the value of bit B 6 of the first U-SIG symbol is set to zero (0), the value of bits B 0 and B 1 of the second U-SIG symbol is set to one (1), and the value of bit B 2 of the second U-SIG symbol is set to zero (0) to indicate that the single PPDU includes the HE PPDU together with the EHT PPDU and the single PPDU is related to a single user (SU) transmission,
wherein the value of bit B 6 of the first U-SIG symbol is set to zero (0), the value of bits B 0 and B 1 of the second U-SIG symbol is set to two (2), and the value of bit B 2 of the second U-SIG symbol is set to zero (0) to indicate that the single PPDU includes the HE PPDU together with the EHT PPDU and the single PPDU is related to a non-OFDMA transmission, and
wherein the value of bit B 6 of the first U-SIG symbol is set to one (1), the value of bits B 0 and B 1 of the second U-SIG symbol is set to zero (0), and the value of bit B 2 of the second U-SIG symbol is set to zero (0) to indicate that the single PPDU includes the HE PPDU together with the EHT PPDU and the single PPDU is related to a trigger-based PPDU.