Method for transmitting sounding reference signal in wireless communication system and device therefor
The present specification provides a method for transmitting a sounding reference signal (SRS) in a wireless communication system. More particularly, a method for transmitting, by a terminal, a sounding reference signal (SRS) in a wireless communication system comprises: receiving, from a base station, information relating to a plurality of SRS resource sets, the SRS resource sets each comprising one or more SRS resources; and transmitting, to the base station, an SRS on the plurality of SRS resources based on the information, wherein, if the plurality of SRS resources are included in difference SRS resource sets, the SRS is transmitted simultaneously on the plurality of SRS resources.
1. A method for receiving, by a base station, a sounding reference signal (SRS) in a wireless communication system, the method comprising:
receiving, from a terminal, capability information including a maximum number of SRS resources per each SRS resource set supported by the terminal;
transmitting, to the terminal, configuration information including 1) information related to a first SRS resource set and a second SRS resource set, each of the first SRS resource set and the second SRS resource set comprising one or more SRS resources based on the capability information and 2) a phase-tracking reference signal (PT-RS) port index information for one or more SRS resources;
transmitting, to the terminal, downlink control information (DCI) including information related to a plurality of SRS resource indicators and information related to a plurality of precoding information and number of layers; and
receiving, from the base station, the SRS on at least one SRS resource based on the configuration information and the DCI,
wherein based on the at least one SRS resource being included in different SRS resource sets, the SRS is received in a same time unit on the at least one SRS resource in each of the different SRS resource sets,
wherein the plurality of SRS resource indicators include a first SRS resource indicator indicating at least one SRS specific resource among the one or more SRS resources included in the first SRS resource set and a second SRS resource indicator indicating at least one specific SRS resource among the one or more SRS resources included in the second SRS resource set,
wherein the plurality of precoding information and number of layers include a first precoding information and number of layers corresponding to the first SRS resource indicator and the second precoding information and number of layers corresponding to the second SRS resource indicator, and
wherein, based on the at least one SRS resource being associated with a specific PT-RS port index, dedicated demodulation reference signal (DM-RS) ports are associated to the specific PT-RS port index.
2. A base station configured to transmit a sounding reference signal (SRS) in a wireless communication system, the base station comprising:
a transmitter and a receiver; and
a processor functionally connected to the transmitter and receiver, wherein the processor is configured to:
receive, from a terminal, capability information including a maximum number of SRS resources per each SRS resource set supported by the terminal;
transmit, to the terminal, configuration information including 1) information related to a first SRS resource set and a second SRS resource set, each of the first SRS resource set and the second SRS resource set comprising one or more SRS resources based on the capability information and 2) a phase-tracking reference signal (PT-RS) port index information for one or more SRS resources;
transmit, to the terminal, downlink control information (DCI) including information related to a plurality of SRS resource indicators and information related to a plurality of precoding information and number of layers; and
receive, from the terminal, the SRS on at least one SRS resource based on the configuration information and the DCI,
wherein based on the at least one SRS resource being included in different SRS resource sets, the SRS is received in a same time unit on the at least one SRS resource in each of the different SRS resource sets,
wherein the plurality of SRS resource indicators include a first SRS resource indicator indicating at least one specific SRS resource among the one or more SRS resources included in the first SRS resource set and a second SRS resource indicator indicating at least one specific SRS resource among the one or more SRS resources included in the second SRS resource set,
wherein the plurality of precoding information and number of layers include a first precoding information and number of layers corresponding to the first SRS resource indicator and the second precoding information and number of layers corresponding to the second SRS resource indicator, and
wherein, based on the at least one SRS resource being associated with a specific PT-RS port index, dedicated demodulation reference signal (DM-RS) ports are associated to the specific PT-RS port index.
3. A method for transmitting, by a terminal, a sounding reference signal (SRS) in a wireless communication system, the method comprising:
transmitting, to a base station, capability information including a maximum number of SRS resources per each SRS resource set supported by the terminal;
receiving, from the base station, configuration information including 1) information related to a plurality of resource sets, each of the plurality of SRS resource sets comprising one or more SRS resources based on the capability information and 2) a phase-tracking reference signal (PT-RS) port index information for one or more SRS resources;
receiving, from the base station, downlink control information (DCI) including information related to a plurality of SRS resource indicators and information related to a plurality of precoding information and number of layers; and
transmitting, to the base station, the SRS in a same time unit on at least one SRS resource included in different SRS resource sets, based on the configuration information,
wherein each of the plurality of SRS resource indicators corresponds to the each of the plurality of SRS resource sets, and
wherein each of the plurality of precoding information and number of layers corresponds to the each of the plurality of the SRS resource indicators.
4. The method of claim 3 , wherein the plurality of SRS resource indicators include a first SRS resource indicator indicating at least one specific SRS resource among the one or more SRS resources included in the first SRS resource set and a second SRS resource indicator indicating at least one specific SRS resource among the one or more SRS resources included in the second SRS resource set.
5. The method of claim 3 , wherein the plurality of precoding information and number of layers include a first precoding information and number of layers corresponding to the first SRS resource indicator and the second precoding information and number of layers corresponding to the second SRS resource indicator.
6. The method of claim 3 , wherein, based on the at least one SRS resource being associated with a specific PT-RS port index, dedicated demodulation reference signal (DM-RS) ports are associated to the specific PT-RS port index.
7. A terminal configured to transmit a sounding reference signal (SRS) in a wireless communication system, the terminal comprising:
a transmitter and a receiver; and
a processor functionally connected to the transmitter and receiver, wherein the processor is configured to:
transmit, to a base station, capability information including a maximum number of SRS resources per each SRS resource set supported by the terminal;
receive, from the base station, configuration information including 1) information related to a plurality of resource sets, each of the plurality of SRS resource sets comprising one or more SRS resources based on the capability information and 2) a phase-tracking reference signal (PT-RS) port index information for one or more SRS resources;
receive, from the base station, downlink control information (DCI) including information related to a plurality of SRS resource indicators and information related to a plurality of precoding information and number of layers; and
transmit, to the base station, the SRS in a same time unit on at least one SRS resource included in different SRS resource sets, based on the configuration information,
wherein each of the plurality of SRS resource indicators corresponds to the each of the plurality of SRS resource sets, and
wherein each of the plurality of precoding information and number of layers corresponds to the each of the plurality of the SRS resource indicators.
8. The terminal of claim 7 , wherein the plurality of SRS resource indicators include a first SRS resource indicator indicating at least one specific SRS resource among the one or more SRS resources included in the first SRS resource set and a second SRS resource indicator indicating at least one specific SRS resource among the one or more SRS resources included in the second SRS resource set.
9. The terminal of claim 7 , wherein the plurality of precoding information and number of layers include a first precoding information and number of layers corresponding to the first SRS resource indicator and the second precoding information and number of layers corresponding to the second SRS resource indicator.
10. The terminal of claim 7 , wherein, based on the at least one SRS resource being associated with a specific PT-RS port index, dedicated demodulation reference signal (DM-RS) ports are associated to the specific PT-RS port index.