Restricted twt operation which has been improved

A station (STA) in a wireless local area network (LAN) system, the STA comprising;

• a memory;
• a transceiver;
• and
• a processor operatively coupled to the memory and the transceiver,
• wherein the processor is adapted to:
• receive a signal including information for a restricted target wake time (TWT) from an access point (AP),
• wherein the information includes a restricted TWT service period (SP) and a priority of latency-sensitive data transmitted and received in the restricted TWT SP;
• and
• transmit data to the AP within an obtained transmission opportunity (TXOP),
• wherein based on a priority of the data being lower than the priority of the latency-sensitive data, the processor terminates the TXOP before a start of the restricted TWT SP,
• wherein based on a priority of the data being higher than the priority of the latency-sensitive data, the processor maintains the transmission of the data after a start time of the restricted TWT SP.

A method in a wireless local area network (LAN) system, the method comprising:

• transmitting, by an access point (AP), a signal including information for a restricted target wake time (TWT) from an access point (AP),
• wherein the information includes a restricted TWT service period (SP) and a priority of latency-sensitive data transmitted and received in the restricted TWT SP;
• and
• receiving, by the AP, first data from a first station (STA);
• and
• receiving, by the AP, second data from a second STA,
• wherein based on a priority of the first data being higher than a priority of the second data, the first data is transmitted until a first time elapses from a start time of the restricted TWT SP, and the second data is transmitted after the first time elapses from the start time of the restricted TWT SP,
• wherein based on a priority of the first data being lower than a priority of the second data, the AP receives the first data until the start time of the restricted TWT SP and receives the second data within the restricted TWT SP.