Ndpa frame transmission method and related apparatus

A communication apparatus, comprising:

• a processor, configured to generate a null data packet announcement (NDPA) frame including an NDPA variant field set to 00, wherein the NDPA frame further includes at least one of a first field or a station information field;
• and
• a transceiver configured to send the NDPA frame, wherein:
• the first field comprises one or more disambiguation bits, each disambiguation bit is 1, bit positions of the one or more disambiguation bits in the first field are B11+16*k, k being a natural number;
• and
• the station information field comprises one or more disambiguation bits, each disambiguation bit is 1, bit positions of the one or more disambiguation bits in the station information field are B27+16*q, q being an integer greater than or equal to −1.

A chip, wherein the chip is coupled to a memory, and is configured to implement a null data packet announcement (NDPA) frame transmission method, wherein the method comprising:

• generating, by a beamformer, a null data packet announcement (NDPA) frame including an NDPA variant field set to 00, wherein the NDPA frame further includes at least one of a first field or a station information field;
• and
• sending, by the beamformer, the NDPA frame, wherein:
• the first field comprises one or more disambiguation bits, each disambiguation bit is 1, bit positions of the one or more disambiguation bits in the first field are B11+16*k, and k is a natural number, and
• the station information field comprises one or more disambiguation bits, each disambiguation bit is 1, bit positions of the one or more disambiguation bits in the station information field are B27+16*q, and q is an integer greater than or equal to −1.