Methods, systems, and apparatus for transmitting uplink control information

A method implemented by a base station, the method comprising:

• transmitting downlink control information (DCI) for a downlink transmission, the DCI comprising a physical uplink control channel (PUCCH) resource index, wherein the PUCCH resource index indicates one or more resource blocks to be used to receive a PUCCH transmission;
• transmitting the downlink transmission in accordance with the DCI;
• and
• receiving the PUCCH transmission via the one or more resource blocks, wherein the PUCCH transmission is associated with a first cyclic shift applied to a first symbol of the PUCCH transmission and a second cyclic shift applied to a second symbol of the PUCCH transmission, wherein the first and second cyclic shifts are different, the first and second cyclic shifts indicate hybrid automatic retransmission request (HARQ) acknowledgement or negative acknowledgement (ACK/NACK) information and positive or negative scheduling request (SR) information, wherein the first cyclic shift corresponds to one of four cyclic shifts that can be used for indicating the HARQ ACK/NACK information and the positive or negative SR information when a single HARQ ACK/NACK is indicated, and the four cyclic shifts are separated by three cyclic shift value.