Null data packet announcement frame transmission method and related apparatus
A method includes: An access point generates an NDPA frame, where the NDPA frame includes a station information field, and the station information field includes an AID subfield indicating an association identifier AID of a station; the station information field further includes a partial bandwidth information subfield; the partial bandwidth information subfield indicates an RU that is in a bandwidth corresponding to the NDPA frame and for which the station needs to feed back channel state information; and the bandwidth corresponding to the NDPA frame is greater than 160 MHz. The access point transmits the NDPA frame.
1 . A null data packet announcement (NDPA) frame transmission method, comprising:
generating an NDPA frame, wherein the NDPA frame comprises a station information field, and the station information field comprises a partial bandwidth information subfield, the partial bandwidth information subfield indicates a resource unit (RU) that is in a bandwidth corresponding to the NDPA frame and for which the station needs to feed back channel state information, and the bandwidth corresponding to the NDPA frame is 320 MHz, and the RU that is in the 320 MHz indicated by the partial bandwidth information subfield is a 242+484-tone RU or 484+996-tone RU; and
transmitting the NDPA frame.
2 . The method according to claim 1 , wherein the NDPA frame comprises type information, and the type information indicates that the NDPA frame is an extremely high throughput (EHT) NDPA frame.
3 . The method according to claim 1 , wherein the station information field comprises four octets.
4 . The method according to claim 1 , wherein the partial bandwidth information subfield is nine bits.
5 . The method according to claim 1 , wherein the partial bandwidth information subfield comprises eight different RU indication indexes, and four of the eight different RU indication indexes indicate the 484+996-tone RU at different positions in the lowest 160 MHz of the 320 MHz respectively, and another four of the eight different RU indication indexes indicate the 484+996-tone RU at different positions in the highest 160 MHz of the 320 MHz respectively.
6 . A communication apparatus, comprising a processor and a memory, wherein the memory is configured to store instructions, and when the processor runs the instructions, the communication apparatus is configured to perform operations comprising:
generating a null data packet announcement (NDPA) frame, wherein the NDPA frame comprises a station information field, and the station information field comprises a partial bandwidth information subfield, the partial bandwidth information subfield indicates a resource unit (RU) that is in a bandwidth corresponding to the NDPA frame and for which the station needs to feed back channel state information, and the bandwidth corresponding to the NDPA frame is 320 MHz, and the RU that is in the 320 MHz indicated by the partial bandwidth information subfield is a 242+484-tone RU or 484+996-tone RU; and
transmitting the NDPA frame.
7 . The communication apparatus according to claim 6 , wherein the NDPA frame comprises type information, and the type information indicates that the NDPA frame is an extremely high throughput (EHT) NDPA frame.
8 . The communication apparatus according to claim 6 , wherein the partial bandwidth information subfield is nine bits.
9 . The communication apparatus according to claim 6 , wherein the partial bandwidth information subfield comprises eight different RU indication indexes, and four of the eight different RU indication indexes indicate the 484+996-tone RU at different positions in the lowest 160 MHz of the 320 MHz respectively, and another four of the eight different RU indication indexes indicate the 484+996-tone RU at different positions in the highest 160 MHz of the 320 MHz respectively.
10 . A non-transitory computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions instruct a communication device to perform operations comprising:
generating a null data packet announcement (NDPA) frame, wherein the NDPA frame comprises a station information field, and the station information field comprises a partial bandwidth information subfield, the partial bandwidth information subfield indicates a resource unit (RU) that is in a bandwidth corresponding to the NDPA frame and for which the station needs to feed back channel state information, and the bandwidth corresponding to the NDPA frame is 320 MHz, and the RU that is in the 320 MHz indicated by the partial bandwidth information subfield is a 242+484-tone RU or 484+996-tone RU; and
transmitting the NDPA frame.
11 . The non-transitory computer-readable storage medium according to claim 10 , wherein the NDPA frame comprises type information, and the type information indicates that the NDPA frame is an extremely high throughput (EHT) NDPA frame.
12 . The non-transitory computer-readable storage medium according to claim 10 , wherein the partial bandwidth information subfield is nine bits.
13 . The non-transitory computer-readable storage medium according to claim 10 , wherein the partial bandwidth information subfield comprises eight different RU indication indexes, and four of the eight different RU indication indexes indicate the 484+996-tone RU at different positions in the lowest 160 MHz of the 320 MHz respectively, and another four of the eight different RU indication indexes indicate the 484+996-tone RU at different positions in the highest 160 MHz of the 320 MHz respectively.