Enhanced NDPA frame for sensing
The present specification proposes NDPA frame formats supported in a next generation wireless LAN system. According to one embodiment of the present specification, the NDPA frame formats may include common information for sensing. Here, the common information may be included in a special user information field. According to another embodiment of the present specification, the NDPA frame formats may use an existing NDPA frame format.
1. A method performed in a wireless local area network (WLAN) system, the method comprising:
transmitting a Null Data Packet Announcement (NDPA) frame,
wherein the NDPA frame includes a Sounding Dialog Token field related to a sensing measurement exchange, wherein the NDPA frame further includes a station (STA) info field,
wherein the STA info field includes an Association Identifier (AID) field and one-bit information which is denoted by ‘B 31 ’ in the STA info field,
wherein the NDPA frame includes a plurality of variants including a Very High Throughput (VHT) NDPA frame, a High-Efficiency (HE) NDPA frame, a Ranging NDPA frame, a Sensing NDPA frame, and an Extremely High Throughput (EHT) NDPA frame,
wherein the plurality of variants are distinguished based on two-bit information of the Sounding Dialog Token field, the AID field, and the one-bit information,
wherein the two-bit information has a first value for the VHT NDPA frame, the two-bit information has a second value for the Sensing NDPA frame and the Ranging NDPA frame, the two-bit information has a third value for the HE NDPA frame, and the two-bit information has a fourth value for the EHT NDPA frame,
wherein the STA info field further includes a measurement session identifier (ID) of the sensing measurement exchange; and
transmitting the null data packet (NDP) frame, wherein the NDP frame is preceded by the NDPA frame.
2. The method of claim 1 , wherein the Sensing NDPA frame and the Ranging NDPA frame are distinguished based on the one-bit information.
3. The method of claim 1 , wherein the Sounding Dialog Token field includes a Sounding Dialog Token number field which is contiguous to the two-bit information.
4. A method performed in a wireless local area network (WLAN) system, the method comprising:
receiving a Null Data Packet Announcement (NDPA) frame,
wherein the NDPA frame includes a Sounding Dialog Token field related to a sensing measurement exchange, wherein the NDPA frame further includes a station (STA) info field,
wherein the STA info field includes an Association Identifier (AID) field and one-bit information which is denoted by ‘B 31 ’ in the STA info field,
wherein the NDPA frame includes a plurality of variants including a Very High Throughput (VHT) NDPA frame, a High-Efficiency (HE) NDPA frame, a Ranging NDPA frame, a Sensing NDPA frame, and an Extremely High Throughput (EHT) NDPA frame,
wherein the plurality of variants are distinguished based on two-bit information of the Sounding Dialog Token field, the AID field, and the one-bit information,
wherein the two-bit information has a first value for the VHT NDPA frame, the two-bit information has a second value for the Sensing NDPA frame and the Ranging NDPA frame, the two-bit information has a third value for the HE NDPA frame, and the two-bit information has a fourth value for the EHT NDPA frame,
wherein the STA info field further includes a measurement session identifier (ID) of the sensing measurement exchange; and
receiving the null data packet (NDP) frame, wherein the NDP frame is preceded by the NDPA frame.
5. The method of claim 4 , wherein the Sensing NDPA frame and the Ranging NDPA frame are distinguished based on the one-bit information.
6. The method of claim 4 , wherein the Sounding Dialog Token field includes a Sounding Dialog Token number field which is contiguous to the two-bit information.
7. A station (STA) in a wireless local area network (WLAN) system, comprising:
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
receiving a Null Data Packet Announcement (NDPA) frame,
wherein the NDPA frame includes a Sounding Dialog Token field related to a sensing measurement exchange, wherein the NDPA frame further includes a station (STA) info field,
wherein the STA info field includes an Association Identifier (AID) field and one-bit information which is denoted by ‘B 31 ’ in the STA info field,
wherein the NDPA frame includes a plurality of variants including a Very High Throughput (VHT) NDPA frame, a High-Efficiency (HE) NDPA frame, a Ranging NDPA frame, a Sensing NDPA frame, and an Extremely High Throughput (EHT) NDPA frame,
wherein the plurality of variants are distinguished based on two-bit information of the Sounding Dialog Token field, the AID field, and the one-bit information,
wherein the two-bit information has a first value for the VHT NDPA frame, the two-bit information has a second value for the Sensing NDPA frame and the Ranging NDPA frame, the two-bit information has a third value for the HE NDPA frame, and the two-bit information has a fourth value for the EHT NDPA frame,
wherein the STA info field further includes a measurement session identifier (ID) of the sensing measurement exchange; and
receiving the null data packet (NDP) frame, wherein the NDP frame is preceded by the NDPA frame.
8. The STA of claim 7 , wherein the Sensing NDPA frame and the Ranging NDPA frame are distinguished based on the one-bit information.
9. The STA of claim 7 , wherein the Sounding Dialog Token field includes a Sounding Dialog Token number field which is contiguous to the two-bit information.