Device and method for transmitting and receiving control information and data in communication system

1 . A method for a user equipment (UE) to receive a phase tracking reference signal (PT-RS) in a wireless communication system, the method comprising:

determining, through higher layer signaling, whether at least one of a first parameter related to a time density of the PT-RS and a second parameter related to a frequency density of the PT-RS is configured for the UE, wherein the first parameter indicates three threshold values for a PTRS-modulation and coding scheme (MCS) and the second parameter indicates two threshold values for a bandwidth;

in case that the first parameter is configured through the higher layer signaling, determining that the PT-RS is not present or a first value corresponding to the time density based on at least one of the first parameter, a highest threshold value for the PTRS-MCS, and a scheduled MCS;

in case that the second parameter is configured through the higher layer signaling, determining that the PT-RS is not present or a second value corresponding to the frequency density based on the second parameter and a scheduled bandwidth;

and

in case that neither the first parameter nor the second parameter is configured for the UE, 1024 QAM is applied to the wireless communication system, and a scheduled MCS is smaller than a smallest index value among indexes corresponding to modulation order 4 in an MCS table, determining that a base station does not transmit the PT-RS,

wherein the highest threshold value for the PTRS-MCS is assumed to be 27 in case that the 1024 QAM is applied to the wireless communication system.

2 . The method of claim 1 , further comprising:

receiving, from the base station through the higher layer signaling, PT-RS downlink configuration information (PTRS-DownlinkConfig) comprising the first parameter and the second parameter.

3 . The method of claim 2 ,

wherein the PT-RS downlink configuration information comprises a plurality of parameters related to the time density of the PT-RS, and

in case that the MCS table corresponding to the 1024 QAM is configured, each of the plurality of parameters is configured to be an integer value from 0 to 27.

4 . The method of claim 1 ,

in case that an MCS scheduled based on the first parameter belongs to a first range, the first value corresponding to the first range is determined, and

in case that a bandwidth scheduled based on the second parameter belongs to a second range, the second value corresponding to the second range is determined.

5 . The method of claim 1 , wherein the MCS table corresponding to the 1024 QAM comprises modulation and code rate combinations of (1024QAM, 805.5/1024), (1024QAM, 853/1024), (1024QAM, 900.5/1024), and (1024QAM, 948/1024).

6 . The method of claim 1 , further comprising:

in case that the first parameter and the second parameter are not configured for the UE, identifying a third value corresponding to a preconfigured time density and a fourth value corresponding to a preconfigured frequency density; and

receiving the PT-RS from the base station based on at least one of the third value and the fourth value.

7 . A method for a base station to transmit a phase tracking reference signal (PT-RS) in a wireless communication system, the method comprising:

determining whether to configure at least one of a first parameter related to a time density of the PT-RS and a second parameter related to a frequency density of the PT-RS to a UE through higher layer signaling, wherein the first parameter indicates three threshold values for a PTRS-modulation and coding scheme (MCS) and the second parameter indicates two threshold values for a bandwidth; and

transmitting the PT-RS to the UE based on at least one of a first value corresponding to the time density, a presence of the PT-RS, and a second value corresponding to the frequency density, wherein the PT-RS is not present, or the first value is determined based on at least one of the first parameter, a highest threshold value for the PTRS-MCS, and a scheduled MCS, and wherein the PT-RS is not present, or the second value is determined based on the second parameter and a scheduled bandwidth,

wherein in case that neither the first parameter nor the second parameter is configured for the UE, 1024 QAM is applied to the wireless communication system, and a scheduled MCS is smaller than a smallest index value among indexes corresponding to modulation order 4 in an MCS table, the base station does not transmit the PT-RS, and

wherein the highest threshold value for the PTRS-MCS is assumed to be 27 in case that the 1024 QAM is applied to the wireless communication system.

8 . The method of claim 7 , further comprising:

transmitting, to the UE through the higher layer signaling, PT-RS downlink configuration information (PTRS-DownlinkConfig) comprising the first parameter and the second parameter.

9 . The method of claim 8 ,

wherein the PT-RS downlink configuration information comprises a plurality of parameters related to the time density of the PT-RS, and

in case that the MCS table corresponding to the 1024 QAM is configured, each of the plurality of parameters is configured to be an integer value from 0 to 27.

10 . The method of claim 7 , wherein the MCS table corresponding to the 1024 QAM comprises modulation and code rate combinations of (1024QAM, 805.5/1024), (1024QAM, 853/1024), (1024QAM, 900.5/1024), and (1024QAM, 948/1024).

11 . A user equipment (UE) configured to receive a phase tracking reference signal (PT-RS) in a wireless communication system, the UE comprising:

a transceiver; and

a controller coupled with the transceiver and configured to control the transceiver,

wherein the controller is configured to:

determine, through higher layer signaling, whether at least one of a first parameter related to a time density of the PT-RS and a second parameter related to a frequency density of the PT-RS is configured for the UE, wherein the first parameter indicates three threshold values for a PTRS-modulation and coding scheme (MCS) and the second parameter indicates two threshold values for a bandwidth;

in case that the first parameter is configured through the higher layer signaling, determine that the PT-RS is not present or a first value corresponding to the time density based on at least one of the first parameter, a highest threshold value for the PTRS-MCS, and a scheduled MCS;

in case that the second parameter is configured through the higher layer signaling, determine that the PT-RS is not present or a second value corresponding to the frequency density based on the second parameter and a scheduled bandwidth;

and

in case that neither the first parameter nor the second parameter is configured for the UE, 1024 QAM is applied to the wireless communication system, and a scheduled MCS is smaller than a smallest index value among indexes corresponding to modulation order 4 in an MCS table, determine that a base station does not transmit the PT-RS, and

wherein the highest threshold value for the PTRS-MCS is assumed to be 27 in case that the 1024 QAM is applied to the wireless communication system.

12 . The UE of claim 11 , wherein the controller is configured to control to:

receive, from the base station through the higher layer signaling, PT-RS downlink configuration information (PTRS-DownlinkConfig) comprising the first parameter and the second parameter.

13 . A base station configured to transmit a phase tracking reference signal (PT-RS) in a wireless communication system, the base station comprising:

a transceiver: and

a controller coupled with the transceiver and configured to control the transceiver,

wherein the controller is configured to:

determine whether to configure at least one of a first parameter related to a time density of the PT-RS and a second parameter related to a frequency density of the PT-RS for a UE through higher layer signaling, wherein the first parameter indicates three threshold values for a PTRS-modulation and coding scheme (MCS) and the second parameter indicates two threshold values for a bandwidth; and

transmit the PT-RS to the UE based on at least one of a first value corresponding to the time density, a presence of the PT-RS, and a second value corresponding to the frequency density, wherein the PT-RS is not present, or the first value is determined based on at least one of the first parameter, a highest threshold value for the PTRS-MCS, and a scheduled MCS, and wherein the PT-RS is not present, or the second value is determined based on the second parameter and a scheduled bandwidth,

wherein in case that neither the first parameter nor the second parameter is configured for the UE, 1024 QAM is applied to the wireless communication system, and a scheduled MCS is smaller than a smallest index value among indexes corresponding to modulation order 4 in an MCS table, the base station does not transmit the PT-RS, and

wherein the highest threshold value for the PTRS-MCS is assumed to be 27 in case that the 1024 QAM is applied to the wireless communication system.