SUB-CHANNEL ALLOCATION IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEX WLAN

摘要

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.

主权项

1. A method for simultaneous communication with multiple communication devices in a wireless local area network, the method comprising:
allocating, by a first communication device, respective sub-channels of an orthogonal frequency division multiplexing (OFDM) communication channel to two or more second communication devices for simultaneous OFDM transmission to the two or more second communication devices, including allocating a first sub-channel to a first one of the two or more second communication devices and a second sub-channel to a second one of the two or more second communication devices; generating, by the first communication device, respective downlink OFDM data units for the two or more second communication devices using the corresponding allocated sub-channels; transmitting, by the first communication device, the downlink OFDM data units to the two or more second communication devices using the corresponding allocated sub-channels; and receiving, at the first communication device, at least i) a first uplink OFDM data unit transmitted by the first one of the two or more second communication devices in response to the corresponding downlink OFDM data unit and ii) a second uplink OFDM data unit transmitted by the second one of the two or more second communication devices in response to the corresponding downlink OFDM data unit, wherein the first uplink OFDM data unit is transmitted from the first one of the two or more second communication devices via the first sub-channel allocated to the first one of the two or more second communication devices and the second uplink OFDM data unit is transmitted from the second one of the two or more second communication devices via the second sub-channel allocated to the second one of the two or more second communication devices.