Apparatus and method for channel access

A method for a sector training operation by a station (STA), the method comprising:

• receiving, from an access point (AP), a beacon frame including restricted access window (RAW) assignment information, wherein the RAW assignment information includes assignment information for a sector sounding RAW and a sector reporting RAW;
• receiving at least one No Data Protocol (NDP) type frames for sector training in the sector sounding RAW;
• and
• transmitting a feedback frame including a selected sector identification (ID) in a sector reporting RAW.

An apparatus of a station (STA) for a sector training operation, the apparatus comprising:

• a transmitter;
• a receiver;
• and
• a processor,
• wherein the processor is configured to:
• cause the receiver to receive, from an access point (AP), a beacon frame including restricted access window (RAW) assignment information, wherein the RAW assignment information includes assignment information for a sector sounding RAW and a sector reporting RAW;
• cause the receiver to receive at least one No Data Protocol (NDP) type frames for sector training in the sector sounding RAW;
• and
• cause the transmitter to transmit a feedback frame including a selected sector identification (ID) in a sector reporting RAW.