US Pat. No. 10,397,955

UPLINK PPDU TRANSMISSION

FRONTSIDE, Seongnam (KR)...

1. A method for uplink transmission in a wireless local area network, the method comprising:establishing, by a station, a connection with an access point (AP);
receiving, by the station, information about a first basic service set (BSS) color identifying a BSS managed by the AP;
receiving, by the station, a first physical layer protocol data unit (PPDU), the first PPDU including a second BSS color and a first duration field;
comparing, by the station, the first BSS color and the second BSS color to determine whether or not the received first PPDU is from the AP; and
when the second BSS color matches with the first BSS color and the first PPDU requests a transmission of a second PPDU, transmitting, by the station, the second PPDU to the AP as a response to the first PPDU, the second PPDU including a second duration field,
wherein the first duration field of the first PPDU indicates an estimated time required to transmit the second PPDU,
wherein the second PPDU does not include any frame that solicits a control response frame to be sent by the AP when a value of the second duration field is set to zero, and
wherein the control response frame includes an acknowledgement frame for acknowledging the second PPDU.