Method and apparatus for adjusting contention window size, and data transmission device

A data transmission device, comprising:

• a processor;
• and
• a memory configured to store instructions executable by the processor;
• wherein the processor is configured to:
• receive Hybrid Automatic Repeat reQuest (HARQ) feedback information for first data units and/or second data units from a data reception terminal within a reference duration, the HARQ feedback information comprising acknowledgement (ACK) information or non-acknowledgement (NACK) information, one second data unit comprising one or more first data units;
• determine target first data units or target second data units, for which the HARQ feedback information is counted as the NACK information;
• calculate a NACK ratio within the reference duration based on the determined target first data units and/or target second data units;
• and
• adjust the CWS based on the NACK ratio.

A non-transitory computer-readable storage medium having stored thereon instructions that, when executed by a processor of a data transmission device, cause the data transmission device to perform a method for adjusting a contention window size (CWS), the method comprising:

• receiving Hybrid Automatic Repeat reQuest (HARQ) feedback information for first data units and/or second data units from a data reception terminal within a reference duration, the HARQ feedback information comprising acknowledgement (ACK) information or non-acknowledgement (NACK) information, one second data unit comprising one or more first data units;
• determining target first data units or target second data units, for which the HARQ feedback information is counted as the NACK information;
• calculating a NACK ratio within the reference duration based on the determined target first data units and/or target second data units;
• and
• adjusting the CWS based on the NACK ratio.