Method for transmitting/receiving signal based on ps mode in wlan system and apparatus thereof

A first station (STA) for transmitting or receiving a signal based on a power saving (PS) mode in a wireless local area network (WLAN) system, the first STA comprising:

• a memory;
• a transceiver;
• and
• a processor operatively coupled with the memory and the transceiver, wherein the processor is configured to:
• determine the PS mode in a service period (SP) based on a time division duplex (TDD);
• and
• transmit the signal to the second STA or receiving the signal from the second STA based on the PS mode,
• wherein the SP includes a plurality of TDD slots,
• wherein the plurality of TDD slots include an unassigned TDD slot, an assigned Tx TDD slot, and an assigned Rx TDD slot,
• wherein, in the unassigned TDD slot, a PS mode of the first STA is determined as a doze state, and a PS mode of the second STA is determined an awake or doze state,
• wherein, in the assigned Rx TDD slot, the PS mode of the first STA is determined as the awake state, and the PS mode of the second STA is determined as the awake state, and
• wherein, in the assigned Tx TDD slot, the PS mode of the first STA is determined as the awake or doze state, and the PS mode of the second STA is determined as the awake state.

A method of transmitting or receiving a signal based on a power saving (PS) mode in a wireless local area network (WLAN) system, the method comprising:

• determining, by a first station (STA), the PS mode a service period (SP) based on a time division duplex (TDD);
• and
• transmitting, by the first STA, the signal to the second STA or receiving the signal from the second STA based on the PS mode,
• wherein the SP includes a plurality of TDD slots,
• wherein the plurality of TDD slots include an unassigned TDD slot, an assigned Tx TDD slot, and an assigned Rx TDD slot,
• wherein, in the unassigned TDD slot, a PS mode of the first STA is determined as an awake or doze state, and a PS mode of the second STA is determined as a doze state,
• wherein, in the assigned Rx TDD slot, the PS mode of the first STA is determined as the awake state, and the PS mode of the second STA is determined as the awake state,
• wherein, in the assigned Tx TDD slot, the PS mode of the first STA is determined as the awake state, and the PS mode of the second STA is determined as the awake or doze state,
• wherein the first STA is an AP or a Personal basic service set Control Point (PCP), and
• wherein the second STA is a non-AP STA or a non-PCP STA.