Patent ID: 7230908

Claim:
A method of communicating data in a multi-user communication system using orthogonal frequency division multiplexing (OFDM), comprising the steps of: providing channel information for one or more dynamically assigned frequency channels of a plurality of frequency channels in an OFDM communication link; receiving link information identifying link conditions for one or more devices to receive said channel information; dynamically varying a modulation and coding format associated with said channel information in said one or more dynamically assigned frequency channels in a response to said identified link conditions; and transmitting said channel information according to said varied modulation and coding format to said receiving devices in said dynamically assigned frequency channels using a broadcast communication signal; wherein said channel information includes a unique ID, said unique ID for uniquely identifying each said receiving device; wherein said unique ID is utilized to transmit said channel information in unicast to select ones of said plurality of receiving devices or in multicast to all said receiving devices.