Patent ID: 9538511
Date: 2017-01-03
CPC Classifications: H04L,H04W

Claim:
1. A method for transmitting, by a user equipment (UE), uplink control information (UCI) on a physical uplink control channel (PUCCH) in a wireless communication system, the method comprising: performing channel coding on information bits of the UCI to generate encoded information bits, wherein the information bits of the UCI include hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits for serving cells, and wherein a number of information bits of the UCI is determined based on a number of the serving cells and a number of codewords for each of the serving cells, which is based on a transmission mode of each of the serving cells; modulating the encoded information bits to generate modulation symbols; spreading the modulation symbols with an orthogonal sequence; and transmitting the spread modulation symbols to a base station on the PUCCH, wherein when the base station does not transmit any data in one serving cell among the serving cells, the information bits of the UCI include a non-acknowledgement (NACK) for the one serving cell, and wherein the serving cells correspond to configured downlink components carriers (DL CCs).