US Patent 10181930 Multiplexing acknowledgment messages in response to downlink frames

In an example of multi-user wireless communications, an access point may send a downlink frame to multiple stations. Some or all of the stations may generate and transmit their respective uplink frames. The uplink frames from the stations may be aggregated or multiplexed to form a final uplink frame that is received by the access point. The uplink frames may be block acknowledgment or acknowledgment (BA or ACK) frames. Uplink response scheduling may be located in a payload of the downlink frame, in which the uplink response scheduling indicates one or more resource units assigned to the multiple stations for transmitting the uplink frames. In some examples, the uplink response scheduling is in a control field of the payload, in a trigger frame as part of the payload. In some aspects, the downlink frame is part of a multicast transmission. Other methods, apparatus, and computer-readable media are also disclosed.