Patent ID: 7221680
Filing Date: 2007-05-22
Classification: H04B,H04L,H04N,H04W,Y02D

Abstract:
1. A method of broadcasting and multicasting data in a wireless multi-carrier communication system, comprising: processing a plurality of data streams to obtain a plurality of data symbol streams, one data symbol stream for each data stream; allocating transmission units to each of the plurality of data streams, each transmission unit corresponding to one subband in one symbol period and being usable to transmit one data symbol; mapping data symbols in each data symbol stream onto the transmission units allocated to the corresponding data stream; forming a composite symbol stream with data symbols for the plurality of data streams mapped onto the allocated transmission units, wherein each data stream is independently recoverable by a receiver based on the data symbols included in the composite symbol stream for the data stream; and multiplexing overhead symbols onto the composite symbol stream, wherein the overhead symbols carry signaling indicating the transmission units allocated to each of the plurality of data streams.