Full-duplex communication method during target wake time service period in high efficient wireless lan network and station apparatus

A full-duplex communication method in a target wake time (TWT) service period of a high-efficiency wireless local area network (WLAN), the full-duplex communication method being performed by a TWT requesting station, the method comprising:

• entering a sleep mode;
• receiving a reference frame including information regarding a resource unit (RU) in a target channel for a TWT service period (SP) from a TWT responding station after waking up;
• transmitting an uplink frame to the TWT responding station at a specific timing determined on a basis of the reference frame through the RU;
• and
• receiving a downlink frame from the TWT responding station at the specific timing,
• wherein the uplink frame and the downlink frame synchronized at the specific timing are transmitted simultaneously in a same time period on a basis of the reference frame through a same channel,
• wherein a duration of a legacy part of the uplink frame and a duration of a legacy part of the downlink frame are same, and
• wherein the legacy part of the downlink frame includes a null field in which no signal is transmitted or another signal type is transmitted.

A station apparatus for performing full-duplex communication in a power saving mode of a high efficiency wireless local area network (WLAN), the station apparatus comprising:

• a communication device configured to receive a reference frame including information regarding a resource unit (RU) for a target wake time (TWT) service period (SP) from an access point (AP) in a WLAN network, receive a downlink frame from the AP at a specific timing, and transmit an uplink frame at the specific timing;
• and
• a processor configured to determine to switch into a wake-up mode in a specific time after entering a sleep mode at a TWT, determine the the specific timing from the reference frame, and process the downlink frame,
• wherein the reference frame is received in the wake-up mode,
• wherein the uplink frame and the downlink frame synchronized at the specific timing are transmitted simultaneously in a same time period on a basis of the reference frame through a same channel,
• wherein a duration of a legacy part of the uplink frame and a duration of a legacy part of the downlink frame are same, and
• wherein the legacy part of the downlink frame includes a null field in which no signal is transmitted or another signal type is transmitted.