Method and apparatus for transmitting uplink control signal in wireless cellular communication system
The present disclosure relates to a communication technique for converging an IoT technology with a 5G communication system for supporting a higher data transmission rate beyond a 4G system, and a system therefor. The present disclosure may be applied to an intelligent service (for example, a smart home, a smart building, a smart city, a smart car or connected car, healthcare, digital education, retail business, a security and safety related service, or the like) on the basis of a 5G communication technology and an IoT related technology. The present invention relates to a wireless communication system. More specifically, disclosed is a method and apparatus for transmitting a control signal associated with uplink data transmission by a terminal when the terminal performs uplink transmission.
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, a message configuring a channel state information reference signal (CSI-RS) resource, the message including first information on a frequency domain location and a frequency domain aggregation level for the CSI-RS resource, second information on a time domain location for the CSI-RS resource, and third information on a code divisional multiplexing (CDM) type for the CSI-RS resource;
identifying a CDM group consisting of two resource elements based on the first information, wherein the two resource elements are defined by two neighboring subcarriers of one orthogonal frequency division multiplexing (OFDM) symbol;
identifying a plurality of resource elements corresponding to the CSI-RS resource based on the first information and the second information, wherein the plurality of resource elements include the CDM group and another CDM group on different OFDM symbols which are aggregated based on the second information indicating two time domain locations; and
receiving, from the base station, a CSI-RS on the plurality of resource elements,
wherein a reference signal density in a physical resource block (PRB) is different for the different OFDM symbols, and the reference signal density is indicated from the base station.
2. The method of claim 1 , wherein the frequency domain aggregation level indicates an extension level of the CDM group in a frequency axis.
3. The method of claim 2 ,
wherein the third information indicates an orthogonal cover code (OCC) to be applied to the two resource elements, and
wherein a length of the OCC is 2.
4. A terminal in a wireless communication system, the terminal comprising:
a transceiver configured to transmit or receive a signal; and
a controller coupled with the transceiver and configured to:
receive, from a base station, a message configuring a channel state information reference signal (CSI-RS) resource, the message including first information on a frequency domain location and a frequency domain aggregation level for the CSI-RS resource, second information on a time domain location for the CSI-RS resource, and third information on a code divisional multiplexing (CDM) type for the CSI-RS resource,
identify a CDM group consisting of two resource elements based on the first information, wherein the two resource elements are defined by two neighboring subcarriers of one orthogonal frequency division multiplexing (OFDM) symbol,
identify a plurality of resource elements corresponding to the CSI-RS resource based on the first information and the second information, wherein the plurality of resource elements include the CDM group and another CDM group on different OFDM symbols which are aggregated based on the second information indicating two time domain locations, and
receive, from the base station, a CSI-RS on the plurality of resource elements,
wherein a reference signal density in a physical resource block (PRB) is different for the different OFDM symbols, and the reference signal density is indicated from the base station.
5. The terminal of claim 4 , wherein the frequency domain aggregation level indicates an extension level of the CDM group in a frequency axis.
6. The terminal of claim 5 ,
wherein the third information indicates an orthogonal cover code (OCC) to be applied to the two resource elements, and
wherein a length of the OCC is 2.
7. A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, a message configuring a channel state information reference signal (CSI-RS) resource, the message including first information on a frequency domain location and a frequency domain aggregation level for the CSI-RS resource, second information on a time domain location for the CSI-RS resource, and third information on a code divisional multiplexing (CDM) type for the CSI-RS resource;
identifying a CDM group consisting of two resource elements based on the first information, wherein the two resource elements are defined by two neighboring subcarriers of one orthogonal frequency division multiplexing (OFDM) symbol;
identifying a plurality of resource elements corresponding to the CSI-RS resource based on the first information and the second information, wherein the plurality of resource elements include the CDM group and another CDM group on different OFDM symbols which are aggregated based on the second information indicating two time domain locations; and
transmitting, to the terminal, a CSI-RS on the plurality of resource elements,
wherein a reference signal density in a physical resource block (PRB) is different for the different OFDM symbols, and the reference signal density is indicated to the terminal.
8. The method of claim 7 , wherein the frequency domain aggregation level indicates an extension level of the CDM group in a frequency axis.
9. The method of claim 8 ,
wherein the third information indicates an orthogonal cover code (OCC) to be applied to the two resource elements, and
wherein a length of the OCC is 2.
10. A base station in a wireless communication system, the base station comprising:
a transceiver configured to transmit or receive a signal; and
a controller coupled with the transceiver and configured to:
transmit, to a terminal, a message configuring a channel state information reference signal (CSI-RS) resource, the message including first information on a frequency domain location and a frequency domain aggregation level for the CSI-RS resource, second information on a time domain location for the CSI-RS resource, and third information on a code divisional multiplexing (CDM) type for the CSI-RS resource,
identify a CDM group consisting of two resource elements based on the first information, wherein the two resource elements are defined by two neighboring subcarriers of one orthogonal frequency division multiplexing (OFDM) symbol,
identify a plurality of resource elements corresponding to the CSI-RS resource based on the first information and the second information, wherein the plurality of resource elements include the CDM group and another CDM group on different OFDM symbols which are aggregated based on the second information indicating two time domain locations, and
transmit, to the terminal, a CSI-RS on the plurality of resource elements,
wherein a reference signal density in a physical resource block (PRB) is different for the different OFDM symbols, and the reference signal density is indicated to the terminal.
11. The base station of claim 10 , wherein the frequency domain aggregation level indicates an extension level of the CDM group in a frequency axis.
12. The base station of claim 11 , wherein the third information indicates an orthogonal cover code (OCC) to be applied to the two resource elements, and
wherein a length of the OCC is 2.