Method and apparatus for transmitting and receiving feedback trigger frames in wireless lan systems

A method for transmitting a feedback frame in a response station (STA) of a wireless communication system, the method comprising:

• receiving a feedback trigger frame comprising an acknowledgement (ACK) indication field from a request STA;
• and
• transmitting the feedback frame from the request STA,
• wherein the ACK indication field is set as a value indicating one of a first response type, a second response type, a third response type associated with No response, or a fourth response type associated with a type other than the first response type, the second response type, or the third response type.

A request station (STA) apparatus for transmitting a feedback trigger frame in a wireless communication system, the STA apparatus, the STA apparatus comprising:

• a transceiver;
• and
• a processor,
• wherein:
• the processor is configured to transmit the feedback trigger frame comprising an acknowledgement (ACK) indication field to a response STA using the transceiver and to receive the feedback frame from the response STA using the transceiver;
• and
• the ACK indication field is set as a value indicating one of a first response type, a second response type, a third response type associated with No response, or a fourth response type associated with a type other than the first response type, the second response type, or the third response type.

A response station (STA) apparatus for transmitting a feedback frame of a wireless communication system, the STA apparatus comprising:

• a transceiver;
• and
• a processor,
• wherein:
• the processor is configured to receive a feedback trigger frame comprising an acknowledgement (ACK) indication field from a request STA using the transceiver, and to transmit the feedback frame from the request STA using the transceiver;
• and
• the ACK indication field is set as a value indicating one of a first response type, a second response type, a third response type associated with No response, or a fourth response type associated with a type other than the first response type, the second response type, or the third response type.