Method for transmitting physical uplink control channel in wireless communication system, and device therefor
The present specification provides a method for transmitting a PUCCH in a wireless communication system. The method for a terminal transmitting a PUCCH, according to the present specification, comprises a step for transmitting a PUCCH to a base station by using a plurality of uplink beams, wherein the PUCCH is transmitted via uplink beams that are different per specific resource unit, wherein the specific resource unit may represent a resource unit for transmitting the PUCCH by the same beams.
1. A method of transmitting, by a user equipment (UE), a physical uplink control channel (PUCCH) carrying uplink control information (UCI) containing channel quality information (CQI) feedback in a wireless communication system, the method comprising:
transmitting, to a base station (BS), a reference signal (RS) for demodulating the PUCCH, using a plurality of uplink beams,
transmitting, to the BS, the PUCCH using the plurality of uplink beams,
wherein each of the plurality of uplink beams corresponds to a different one of a plurality of specific resource units, respectively, and in each of the plurality of specific resource units, the RS and the PUCCH are transmitted through the corresponding uplink beam, and
wherein each specific resource unit indicates a specific number of orthogonal frequency division multiplexing (OFDM) symbols for that specific resource unit in which the corresponding uplink beam for transmitting the PUCCH and RS remains the same,
wherein the UCI is coded at a specific coding rate, the coded UCI is mapped to the specific number of OFDM symbols and the mapping of the coded UCI is repeated within a PUCCH resource in which the PUCCH is transmitted,
wherein a lower quality CQI feedback is coded at a higher coding rate and mapped to greater number of OFDM symbols by increasing the number of PUCCH beams or by PUCCH beam sweeping.
2. The method of claim 1 , wherein the RS is mapped to all or part of the OFDM symbols in each of the specific resource units.
3. The method of claim 1 , wherein interleaving related to the coded UCI is performed in all the OFDM symbols or specific OFDM symbol of the PUCCH resource.
4. The method of claim 1 ,
wherein the specific number of OFDM symbols is based on at least one of a number of the plurality of uplink beams or whether a beam sweeping operation is performed, and
wherein any sweeping operation is based on a beam sweeping operation that one of a plurality of beams for a signal transmission applied during a pre-defined time interval.
5. The method of claim 1 ,
wherein transmission power for the PUCCH is determined based on at least one of a number of the plurality of uplink beams or whether a beam sweeping operation is performed, and
wherein any sweeping operation is based on a beam sweeping operation that a plurality of beams is applied for a signal transmission during a pre-defined time interval.
6. The method of claim 5 , wherein the transmission power for the PUCCH is differently configured for each of the specific resource units.
7. The method of claim 1 , wherein the uplink beam used for the PUCCH transmission for each of the specific resource units is indicated by the BS or selected by the UE.
8. A user equipment transmitting a physical uplink control channel (PUCCH) carrying uplink control information (UCI) containing channel quality information (CQI) feedback in a wireless communication system, the user equipment comprising:
a transmitter and receiver configured to transmit and receive radio signals; and
a processor functionally connected to the transmitter and receiver, wherein the processor is configured to:
transmit, to a base station (BS), a reference signal (RS) for demodulating the PUCCH, using a plurality of uplink beams,
transmit, to the BS, the PUCCH using the plurality of uplink beams,
wherein each of the plurality of uplink beams corresponds to a different one of a plurality of specific resource units, respectively, and in each of the plurality of specific resource units, the RS and the PUCCH are transmitted through the corresponding uplink beam, and
resource unit indicates a specific number of orthogonal frequency division multiplexing (OFDM) symbols for that specific resource unit in which the corresponding uplink beam for transmitting the PUCCH and RS remains the same,
wherein the UCI is coded at a specific coding rate, the coded UCI is mapped to the specific number of OFDM symbols and the mapping of the coded UCI is repeated within a PUCCH resource in which the PUCCH is transmitted,
wherein a lower quality CQI feedback is coded at a higher coding rate and mapped to greater number of OFDM symbols by increasing the number of PUCCH beams or by PUCCH beam sweeping.