Method and apparatus for supporting multiple TTIs, multiple subcarrier spacings, or multiple processing times in wireless communication system

A terminal configured to transmit uplink (UL) control information in a wireless communication system, the terminal comprising:

• a receiver and a transmitter;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
• mapping, in both a time domain and a frequency domain, the UL control information to a radio resource in a transmission time interval (TTI), the UL control information comprising (i) hybrid automatic retransmission request-acknowledgement/non-acknowledgement (HARQ-ACK), and (ii) a rank indicator (RI);
• and
• transmitting the UL control information to a base station (BS), using the radio resource to which the UL control information is mapped in the TTI,
• wherein mapping, in both the time domain and the frequency domain, the UL control information to the radio resource in the TTI comprises:
• based on (i) the TTI having a time duration of two symbols, (ii) a demodulation reference signal (DMRS) not being mapped to any of the two symbols in the TTI, and (iii) the DMRS being mapped to another TTI that is subsequent in time to the TTI:
• mapping the HARQ-ACK to an initial symbol among the two symbols in the TTI, in descending order of frequency from a resource element (RE) of a highest frequency index for the initial symbol;
• and
• mapping the RI to a last symbol among the two symbols in the TTI, in descending order of frequency from an RE of a highest frequency index for the last symbol.

A method of receiving uplink (UL) control information by a base station (BS) in a wireless communication system, the method comprising:

• receiving, from a terminal, UL control information that is mapped, in both a time domain and a frequency domain, to a radio resource in a transmission time interval (TTI);
• and
• determining, from the UL control information, (i) hybrid automatic retransmission request-acknowledgement/non-acknowledgement (HARQ-ACK), and (ii) a rank indicator (RI),
• wherein, based on (i) the TTI having a time duration of two includes three symbols, iii) a demodulation reference signal (DMRS) not being mapped to any of the two symbols in the TTI, and (iii) the DMRS being mapped to another TTI that is subsequent in time to the TTI:
• the HARQ-ACK is mapped to an initial symbol among the two symbols in the TTI, in descending order of frequency from a resource element (RE) of a highest frequency index for the initial symbol, and
• the RI is mapped to a last symbol among the two symbols in the TTI, in descending order of frequency from an RE of a highest frequency index for the last symbol.