Patent ID: 9742544
Date: 2017-08-22
CPC Classifications: H04L,H04W

Claim:
1. A method for processing a received frame by a Station (STA) in a Wireless Local Area Network (WLAN), the method comprising: receiving a first frame including a plurality of downlink data frames for a plurality of STAs, wherein the plurality of downlink data frames for the plurality of STAs are respectively included in a plurality of downlink subchannels in the first frame, wherein ACKnowledgment (ACK) policy fields of the plurality of downlink data frames are set to a same value, and wherein a plurality of 20-Megahertz transmission channels occupied by the first frame include a primary channel; when no error occurs in the received first frame, transmitting a second frame including an ACK of the STA, the ACK of the STA being transmitted simultaneously with ACKs of one or more other STAs, wherein a plurality of uplink subchannels are allocated for transmitting the ACK of the STA and the ACKs of the one or more other STAs such that at least one subchannel is allocated for each of the plurality of 20-Megahertz transmission channels; and when an error occurs in the received first frame, performing carrier sensing using a variably determined Inter-Frame Space (IFS), wherein a bandwidths of an uplink subchannel allocated to the STA is larger than a bandwidth of a downlink subchannel allocated to the STA.