Patent ID: 10420120

Abstract:
A method for transmitting an uplink frame in a wireless local area network (WLAN) system. The method includes receiving, by a first wireless device, a basic trigger frame for an uplink multi-user (UL MU) transmission from a second wireless device, in which the basic trigger frame includes preference information related to an Access Category (AC) type for an aggregation frame that is to be generated by the first wireless device and limit information related to a maximum number of traffic identifiers allowed for the aggregation frame; generating, by the first wireless device, the aggregation frame with a plurality of Quality of Service (QoS) data frames of the first wireless device based on the preference information and the limit information; generating, by the first wireless device, the uplink frame based on the aggregation frame and a QoS null frame set to a no acknowledgement (ACK) policy regardless of the preference information and the limit information, in which the QoS null frame is not required to be acknowledged by the second wireless device based on the no ACK policy; and transmitting, by the first wireless device, the uplink frame to the second wireless device in response to the basic trigger frame.