Patent attributes
A method for simultaneous communication with multiple communication devices in a wireless local area network is described. Respective sub-channels of an orthogonal frequency division multiplexing (OFDM) communication channel are allocated to two or more second communication devices for simultaneous OFDM transmission to the two or more second communication devices, including allocating first and second sub-channels to first and second ones of the two or more second communication devices, respectively. Respective downlink OFDM data units are generated using the corresponding allocated sub-channels. The downlink OFDM data units are transmitted using the corresponding allocated sub-channels. At least first and second uplink OFDM data units transmitted by the respective second communication device in response to the corresponding downlink OFDM data unit are received. The first and second uplink OFDM data units are transmitted from the respective second communication device via the corresponding allocated sub-channel.
