A method and associated access point for processing data for transmission to communication devices, the method comprising determining or receiving channel state information, CSI, relating to a plurality of the communication devices; for each of one or more sub-carriers, determining which communication devices can communicate using the respective subcarrier according to, or based on, the channel state information or data derived therefrom; allocating communication devices to sub-carriers upon which each communication device can communicate; and providing data for at least one or more or each communication device on the sub-carriers to which the respective communication device has been allocated. Preferably, the method uses an adaptive bit loading algorithm to allocate communication devices to sub-carriers.

A method and associated access point for processing data for transmission to communication devices, the method comprising determining or receiving channel state information, CSI, relating to a plurality of the communication devices; for each of one or more sub-carriers, determining which communication devices can communicate using the respective subcarrier according to, or based on, the channel state information or data derived therefrom; allocating communication devices to sub-carriers upon which each communication device can communicate; and providing data for at least one or more or each communication device on the sub-carriers to which the respective communication device has been allocated. Preferably, the method uses an adaptive bit loading algorithm to allocate communication devices to sub-carriers.