Data transmission method and apparatus

A primary access point, comprising:

• at least one processor;
• one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to generate a trigger frame, wherein the trigger frame carries information indicating spatial reuse transmission which indicates whether or not a spatial reuse transmission apparatus of a spatial reuse link is allowed to perform spatial reuse transmission by using all or some of time-frequency resources of a primary link;
• wherein the information indicating spatial reuse transmission occupies 4 bits, wherein, when value of the 4 bits is 0, the information indicating spatial reuse transmission indicates that spatial reuse transmission is prohibited, and wherein one value of the 4 bits, which is different from 0, indicates an allowed maximum interference power;
• and
• a transceiver coupled to the at least one processor, the transceiver configured to send the trigger frame.

A spatial reuse transmission apparatus, comprising:

• at least one processor;
• a transceiver coupled to the at least one processor, the transceiver configured to receive information indicating spatial reuse transmission, wherein the information indicating spatial reuse transmission indicates whether or not a spatial reuse transmission apparatus of a spatial reuse link is allowed to perform spatial reuse transmission by using all or some of time-frequency resources of a primary link;
• wherein the information indicating spatial reuse transmission occupies 4 bits, wherein, when value of the 4 bits is 0, the information indicating spatial reuse transmission indicates that spatial reuse transmission is prohibited, and wherein one value of the 4 bits, which is different from 0, indicates an allowed maximum interference power;
• and
• one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to perform spatial reuse transmission according to the information indicating spatial reuse transmission.