Data transmission method and apparatus

An apparatus, comprising:

• at least one processor;
• and
• a memory having instructions stored thereon that, when executed by the at least one processor, cause the apparatus to:
• cause a first station in a first multi-link device to send a third frame, wherein
• the third frame indicates the first station enabled a sharing mode in which the first station is a shared station,
• the shared station shares spatial streams with another station in the first multi-link device,
• the sharing mode is used for enabling the first station to use the shared spatial streams for receiving or transmitting a physical layer protocol data unit (PPDU), and
• a quantity of the plurality of the shared spatial streams used by the first station is less than or equal to a maximum quantity of shared spatial streams supported by the first multi-link device, the third frame comprises a shared station field, and the shared station field indicates a plurality of stations in the sharing mode;
• and
• receive a fourth frame, wherein the fourth frame is used for responding to the third frame.

A non-transitory computer-readable storage medium having instructions stored thereon that, when executed by a processor, cause an apparatus to:

• cause a first station in a first multi-link device to send a third frame, wherein
• the third frame indicates the first station enabled a sharing mode in which the first station is a shared station,
• the shared station shares spatial streams with another station in the first multi-link device,
• the sharing mode is used for enabling the first station to use the shared spatial streams for receiving or transmitting a physical layer protocol data unit (PPDU), and
• a quantity of the plurality of the shared spatial streams used by the first station is less than or equal to a maximum quantity of shared spatial streams supported by the first multi-link device, the third frame comprises a shared station field, and the shared station field indicates a plurality of stations in the sharing mode;
• and
• receive a fourth frame, wherein the fourth frame is used for responding to the third frame.