SUB-CHANNEL ALLOCATION IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEX WLAN

摘要

A first communication device receives one or more downlink orthogonal frequency division multiplexing (OFDM) data units transmitted by a second communication device via one or more respective sub-channels of an OFDM communication channel. The first communication device identifies the one or more sub-channels of the OFDM communication channel on which the one or more downlink OFDMA data units were transmitted, and determines whether each of the one or more sub-channels on which the one or more downlink OFDMA data units were transmitted is busy. The first communication device generates an uplink OFDM data unit for each sub-channel determined to be not busy, and transmits each of the uplink OFDM data units to the second communication device via the corresponding sub-channel.

主权项

1. A method for simultaneous communication with multiple communication devices in a wireless local area network, the method comprising:
receiving, at a first communication device, one or more downlink orthogonal frequency division multiplexing (OFDM) data units transmitted by a second communication device via one or more respective sub-channels of an OFDM communication channel; identifying, by the first communication device, the one or more sub-channels of the OFDM communication channel on which the one or more downlink OFDMA data units were transmitted; determining, by the first communication device, whether each of the one or more sub-channels on which the one or more downlink OFDMA data units were transmitted is busy; generating, by the first communication device, an uplink OFDM data unit for each sub-channel determined to be not busy; and transmitting each of the uplink OFDM data units to the second communication device via the corresponding sub-channel.