Patent ID: 8437317

Claim:
A communication method in a wireless communication system having transmitters for determining a transmission rate for an associated receiver of a plurality of receivers according to channel state information fed back from one or more of the associated receivers, and transmitting packets at the determined transmission rate, the method comprising: grouping packets to be transmitted to the receivers according to transmission rates; generating a frame having a plurality of sub-frames, each sub-frame including one or more packets having an identical transmission rate, in a transmitter; aggregating sub-frames having packets with different transmission rates into one transmission burst; providing a first delimiter to delimit each of the packets in each of the aggregated sub-frames; providing a control information frame for the transmission burst including a receiver information field having identifiers of each receiver associated with a packet in one of the aggregated frames; separating each receiver identifier in the receiver information field with a second delimiter capable of having two different values to indicate association of each receiver identifier with a sub-frame, wherein a first value for the second delimiter indicates a receiver identifier is in a next sub-frame and a second value for the second delimiter indicates a receiver identifier is included in a same sub-frame as a preceding receiver identifier; and transmitting the transmission burst.