Patent ID: 8787421
Filing Date: 2014-07-22
Classification: H04B,H04J,H04L

Abstract:
1. A method for communicating Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system, the method comprising: transmitting, by a base station, a first signal including first spread ACK/NACK information and second spread ACK/NACK information on a first set of four available neighboring subcarriers in an orthogonal frequency division multiplexing (OFDM) symbol, wherein the first spread ACK/NACK information and the second spread ACK/NACK information are coded on the first set of four available neighboring subcarriers as shown in Table 1; receiving, by a terminal, the first signal including the first spread ACK/NACK information and the second spread ACK/NACK information on the first set of four available neighboring subcarriers; transmitting, by the base station, a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information on a second set of four available neighboring subcarriers in an OFDM symbol, wherein the third spread ACK/NACK information and the fourth spread ACK/NACK information are coded on the second set of four available neighboring subcarriers as shown in Table 2; and receiving, by the terminal, the second signal including the third spread ACK/NACK information and the fourth spread ACK/NACK information on the second set of four available neighboring subcarriers, wherein a wherein the first spread ACK/NACK information and the third spread ACK/NACK information carry first ACK/NACK information, wherein the second spread ACK/NACK information and the fourth spread ACK/NACK information carry second ACK/NACK information, and wherein the first set of four available neighboring subcarriers is separated from the second set of four available neighboring subcarriers by a plurality of subcarriers in a frequency domain.