Data Transmission Method and Apparatus in WLAN

A communication apparatus comprising

• at least one processor;
• and
• a non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor, the programming instructions instruct the at least one processor to:
• generate a physical layer protocol data unit (PPDU), wherein the PPDU includes a High Efficiency Signal field A (HE-SIGA), the HE-SIGA includes a transmission opportunity (TXOP) duration field, the TXOP duration field is used to indicate to other stations a remaining time for using a channel by a station, and the TXOP duration field includes a first part which indicates a granularity used, and a second part which indicates a TXOP duration using the granularity indicated by the first part;
• and
• send the generated PPDU.

A communication apparatus comprising

• at least one processor;
• and
• a non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor, the programming instructions instruct the at least one processor to:
• receive a physical layer protocol data unit (PPDU), wherein the PPDU includes a High Efficiency Signal field A (HE-SIGA), the HE-SIGA includes a transmission opportunity (TXOP) duration field, the TXOP duration field is used to indicate to other stations a remaining time for using a channel by a station, and the TXOP duration field includes a first part which indicates a granularity used, and a second part which indicates a TXOP duration using the granularity indicated by the first part;
• and
• send a responding frame in response to the received PPDU.