Device and method for transmitting/receiving control information and data in communication system
An example method for transmitting control information in a wireless communication system may include designing a CQI table in order to transmit channel state information (CSI); or a method for using the designed CQI table. In addition, the method may comprise: a method for designing a CQI table designed in a situation in which supported services or target BLERs mutually differ; or a method for using the designed CQI table. In addition, the method may comprise a method for determining or configuring a suitable MCS using an adequate MCS table corresponding to the CQI table, or a designed MCS table. In addition, the method may comprise a SINR mapping method and MCS configuration method, based on CQI information reported from a terminal.
1 . A method performed by a base station for determining a modulation and coding scheme (MCS) in a wireless communication system, the method comprising:
receiving, from a user equipment (UE), a channel quality indicator (CQI);
identifying at least one of a rank index or a number of channel state information (CSI)-reference signal (RS) ports;
determining a signal to interference plus noise ratio (SINR) value based on the received CQI;
performing SINR normalization based on the determined SINR value and the at least one of the rank index or the number of the CSI-RS ports; and
determining the MCS based on the normalized SINR value and an MCS table, wherein the MCS table includes a plurality of sets, each of the plurality of sets comprising a modulation order and a target code rate,
wherein the plurality of sets includes a first set including a modulation order of 10 and a target code rate of 805.5/1024,
wherein the plurality of sets includes a second set including a modulation order of 10 and a target code rate of 853/1024,
wherein the plurality of sets includes a third set including a modulation order of 10 and a target code rate of 900.5/1024, and
wherein the plurality of sets includes a fourth set including a modulation order of 10 and a target code rate of 948/1024.
2 . The method of claim 1 , wherein performing the SINR normalization comprises:
performing the SINR normalization based on the rank index and the number of the CSI-RS ports for a first frequency band; and
performing the SINR normalization based on the rank index for a second frequency band.
3 . The method of claim 2 , wherein the first frequency band is an above-6-GHz (A6G) domain, and the second frequency band is a below-6-GHz (B6G) domain.
4 . The method of claim 1 , wherein determining the MCS comprises:
determining, based on hybrid automatic repeat request (HARQ) feedback received from the UE, an offset value corresponding to open loop rate control (OLRC); and
determining the MCS based on the offset value.
5 . The method of claim 4 , wherein the offset value is determined based on the MCS table.
6 . A base station in a wireless communication system, the base station comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
receive, via the transceiver, a channel quality indicator (CQI) from a user equipment (UE),
identify at least one of a rank index or a number of channel state information (CSI)-reference signal (RS) ports,
determine a signal to interference plus noise ratio (SINR) value based on the received CQI,
perform SINR normalization based on the determined SINR value and the at least one of the rank index or the number of the CSI-RS ports, and
determine a modulation and coding scheme (MCS) based on the normalized SINR value and an MCS table,
wherein the MCS table includes a plurality of sets, each of the plurality of sets comprising a modulation order and a target code rate,
wherein the plurality of sets includes a first set including a modulation order of 10 and a target code rate of 805.5/1024,
wherein the plurality of sets includes a second set including a modulation order of 10 and a target code rate of 853/1024,
wherein the plurality of sets includes a third set including a modulation order of 10 and a target code rate of 900.5/1024, and
wherein the plurality of sets includes a fourth set including a modulation order of 10 and a target code rate of 948/1024.
7 . The base station of claim 6 , wherein the controller is configured to:
perform the SINR normalization based on the rank index and the number of the CSI-RS ports for a first frequency band, and
perform the SINR normalization based on the rank index for a second frequency band.
8 . The base station of claim 6 , wherein the controller is configured to:
determine an offset value corresponding to open loop rate control (OLRC) based on hybrid automatic repeat request (HARQ) feedback received from the UE, and
determine the MCS based on the offset value.
9 . The base station of claim 8 , wherein the offset value is determined based on the MCS table.