Patent ID: 8345792

Claim:
A method of transmitting data in a wireless communication system, the method comprising: generating first coded data by repeating first data of a first layer based on a first repetition factor of the first layer; generating second coded data by repeating second data of a second layer based on a second repetition factor of the second layer, the second repetition factor being larger than the first repetition factor; mapping the first coded data to first symbols on a signal constellation by a first permutation; mapping the second coded data assisting the first data to second symbols on the signal constellation by a second permutation; multiplexing the first symbols and the second symbols by adding the first symbols and the second symbols in mixed order to generate multiple modulation symbols; and transmitting the multiple modulation symbols through a multicast broadcast service (MBS) zone in a downlink burst region, wherein a distance between the first symbols is longer than that between the second symbols on the signal constellation, wherein a first scaling factor is applied to the first layer, second scaling factor is applied to the second layer, and the first scaling factor is larger than the second scaling factor, and wherein the multiple modulation symbols are generated by Equation below: S M =α 1 ·S L1 +α 2 S L2 , where α 1 is the first scaling factor, S L1 is one of the first symbols, α 2 is the second scaling factor, and S L2 is one of the second symbols.