Patent ID: 11936580
Assignee: APPLE INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A method, comprising:
at an access point device:
transmitting, to a plurality of second non-access point stations (STAs), a downlink orthogonal frequency division multiple access (OFDMA) frame indicating respective dynamic uplink bandwidth allocations for respective second devices of the plurality of second STAs; and
after a short interframe space (SIFS), receiving, from a second STA of the plurality of second STAs, an uplink transmission responsive to the downlink OFDMA frame using a corresponding dynamic uplink bandwidth allocation and comprising acknowledgement information based on whether the downlink OFDMA frame was successfully received, wherein the uplink transmission is synchronized with a second uplink transmission comprising second acknowledgement information responsive to the downlink OFDMA frame transmitted by a second STA.