Method and apparatus for transmitting uplink control signal in mobile communication system
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention provides a method for more efficiently transmitting uplink control information and data in a mobile communication system which operates in a non-licensed band or a mobile communication system which requires a channel detection operation.
1. A method performed by a terminal in a communication system, the method comprising:
receiving sounding reference signal (SRS) configuration information for transmitting an SRS;
receiving uplink transmission configuration information for transmitting a signal in an unlicensed band, the uplink transmission configuration information including information on a channel sensing period and configuration information for the terminal to transmit uplink data;
determining that a symbol configured to transmit the SRS or a symbol in the channel sensing period overlaps a symbol for transmitting uplink control information included in the uplink data to be transmitted based on the SRS configuration information and the uplink transmission configuration information; and
transmitting, using a set of symbols that exclude the symbol configured to transmit the SRS and the symbol in the channel sensing period from symbols of an uplink subframe, the uplink data and the uplink control information included in the uplink data on a physical uplink shared channel (PUSCH) based on a determination result,
wherein the uplink control information includes an rank indicator (RI), and
wherein symbols configured to transmit the RI in the uplink subframe are based on a column set {4, 7, 10} for a normal cyclic prefix (CP) or a column set {3, 5, 8} for an extended CP.
2. The method of claim 1 , further comprising:
transmitting the SRS on the symbol configured to transmit the SRS that overlaps the symbol for transmitting the uplink control information.
3. The method of claim 1 , further comprising:
performing a channel sensing operation on the symbol in the channel sensing period that overlaps the symbols for transmitting the uplink control information.
4. The method of claim 1 , wherein the SRS is configured to be transmitted on a second symbol of the uplink subframe.
5. A method performed by a base station in a communication system, the method comprising:
transmitting sounding reference signal (SRS) configuration information for receiving an SRS;
transmitting uplink transmission configuration information for receiving a signal in an unlicensed band, the uplink transmission configuration information including information on a channel sensing period and configuration information for a terminal in the communication system to receive uplink data;
determining that a symbol configured to receive the SRS or a symbol in the channel sensing period overlaps a symbol for receiving uplink control information included in the uplink data to be received according to the SRS configuration information and the uplink transmission configuration information; and
receiving, using a set of symbols that exclude the symbol configured to transmit the SRS and the symbol in the channel sensing period from symbols of an uplink subframe, the uplink data and the uplink control information included in the uplink data based on a determination result,
wherein the uplink control information includes an rank indicator (RI), and
wherein symbols configured to transmit the RI in the uplink subframe are based on a column set {4, 7, 10} for a normal cyclic prefix (CP) or a column set {3, 5, 8} for an extended CP.
6. The method of claim 5 , further comprising:
receiving the SRS on the symbol configured to receive the SRS that overlaps the symbols for receiving the uplink control information.
7. The method of claim 5 , wherein the SRS is configured to be received on a second symbol of the uplink subframe.
8. A terminal in a communication system, the terminal comprising:
a transceiver configured to transmit and receive signals with a base station in the communication system; and
a controller comprising a processor configured to:
receive, via the transceiver, sounding reference signal (SRS) configuration information for transmitting an SRS,
receive, via the transceiver, uplink transmission configuration information for transmitting a signal in an unlicensed band, the uplink transmission configuration information including information on a channel sensing period and configuration information for the terminal to transmit uplink data,
determine that a symbol configured to transmit the SRS or a symbol in the channel sensing period overlaps a symbol for transmitting uplink control information included in the uplink data to be transmitted based on the SRS configuration information and the uplink transmission configuration information, and
transmit, via the transceiver, using a set of symbols that exclude the symbol configured to transmit the SRS and the symbol in the channel sensing period from symbols of an uplink subframe, the uplink data and the uplink control information included in the uplink data on a physical uplink shared channel (PUSCH) based on a determination result,
wherein the uplink control information includes an rank indicator (RI), and
wherein symbols configured to transmit the RI in the uplink subframe are based on a column set {4, 7, 10} for a normal cyclic prefix (CP) or a column set {3, 5, 8} for an extended CP.
9. The terminal of claim 8 , wherein the processor is further configured to transmit the SRS on the symbols configured to transmit the SRS that overlaps the symbol for transmitting the uplink control information.
10. The terminal of claim 8 , wherein the processor is further configured to perform a channel sensing operation on the symbol in the channel sensing period that overlaps the symbols for transmitting the uplink control information.
11. A base station in a communication system, the base station comprising:
a transceiver configured to transmit and receive signals with a terminal in the communication system; and
a controller comprising a processor configured to:
transmit, via the transceiver, sounding reference signal (SRS) configuration information for receiving an SRS,
transmit, via the transceiver, uplink transmission configuration information for receiving a signal in an unlicensed band, the uplink transmission configuration information including information on a channel sensing period and configuration information for the terminal to receive uplink data,
determine that a symbol configured to transmit the SRS or a symbol in the channel sensing period overlaps a symbol for transmitting uplink control information included in the uplink data to be transmitted according to the SRS configuration information and the uplink transmission configuration information, and
receive, via the transceiver using a set of symbols that exclude the symbol configured to transmit the SRS and the symbol in the channel sensing period from symbols of an uplink subframe, the uplink data and the uplink control information included in the uplink data from symbols of the uplink subframe based on a determination result,
wherein the uplink control information includes an rank indicator (RI), and
wherein symbols configured to transmit the RI in the uplink subframe are based on a column set {4, 7, 10} for a normal cyclic prefix (CP) or a column set {3, 5, 8} for an extended CP.
12. The base station of claim 11 , wherein the processor is further configured to receive the SRS on the symbol configured to receive the SRS that overlaps the symbols for receiving the uplink control information.
13. The base station of claim 11 , wherein the SRS is configured to be received on a second symbol of the uplink subframe.