Method and apparatus for transmitting and receiving multiple portions of data in wireless cooperative communication system
The disclosure relates to a fifth generation (5G) or sixth generation (6G) communication system for supporting a higher data transmission rate. A method and an apparatus for transmitting and receiving one or more pieces of data between a transmission node and a user equipment (UE) to perform cooperative communication in a wireless communication system, thereby improving communication reliability, are provided.
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, control information for scheduling downlink transmission using at least one transmission reception point (TRP);
identifying that at least a part of a signal, transmitted by a first TRP of the at least one TRP, is to be retransmitted by a second TRP of the at least one TRP, based on the control information;
identifying a code division multiplexing (CDM) group of the second TRP for receiving the at least the part of the signal based on the control information;
receiving, from the second TRP, the at least the part of the signal based on the CDM group of the second TRP; and
combining the signal received from the first TRP and the at least the part of the signal received from the second TRP.
2. The method of claim 1 , wherein the control information comprises at least one of information on the CDM group of the TRP, demodulation reference signal (DMRS) port information indicating at least one DMRS port corresponding to the CDM group of the second TRP, modulation and coding scheme (MCS) information, a new data indicator (NDI), code block group transmission information (CBGTI), or code block group flushing-out information (CBGFI).
3. The method of claim 1 , wherein all of the signal is received from the second TRP.
4. The method of claim 1 , wherein the at least the part of the signal is mapped to a same codeword.
5. The method of claim 1 ,
wherein the CDM group of the second TRP comprises at least one demodulation reference signal (DMRS) port associated with the second TRP, and
wherein the at least the part of the signal received from the second TRP is demodulated based on the at least one DMRS port.
6. A method performed by a base station in a wireless communication system, the method comprising:
generating control information for scheduling downlink transmission using at least one transmission reception point (TRP), wherein the control information indicates that at least a part of a signal, transmitted by a first TRP of the at least one TRP, is retransmitted by a second TRP of the at least one TRP and indicates a code division multiplexing (CDM) group of the second TRP for transmitting the at least the part of the signal;
transmitting, to a terminal, the control information; and
transmitting the at least the part of the signal to the terminal using the second TRP based on the CDM group of the second TRP.
7. The method of claim 6 , wherein the control information comprises at least one of information on the CDM group of the TRP, demodulation reference signal (DMRS) port information indicating at least one DMRS port corresponding to the CDM group of the second TRP, modulation and coding scheme (MCS) information, a new data indicator (NDI), code block group transmission information (CBGTI), or code block group flushing-out information (CBGFI).
8. The method of claim 6 , wherein all of the signal is transmitted to the terminal using the second TRP.
9. The method of claim 6 , wherein the at least the part of the signal is mapped to a same codeword.
10. The method of claim 6 ,
wherein the CDM group of the second TRP comprises at least one demodulation reference signal (DMRS) port associated with the second TRP, and
wherein the at least the part of the signal transmitted from the second TRP is demodulated based on the at least one DMRS port.
11. A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a controller configured to:
receive, from a base station via the transceiver, control information for scheduling downlink transmission using at least one transmission reception point (TRP),
identify that at least a part of a signal, transmitted by a first TRP of the at least one TRP, is to be retransmitted by a second TRP of the at least one TRP, based on the control information,
identify a code division multiplexing (CDM) group of the second TRP for receiving the at least the part of the signal based on the control information,
receive, from the second TRP via the transceiver, the at least the part of the signal based on the CDM group of the second TRP, and
combine the signal received from the first TRP and the at least the part of the signal received from the second TRP.
12. The terminal of claim 11 , wherein the control information comprises at least one of information on the CDM group of the TRP, demodulation reference signal (DMRS) port information indicating at least one DMRS port corresponding to the CDM group of the second TRP, modulation and coding scheme (MCS) information, a new data indicator (NDI), code block group transmission information (CBGTI), or code block group flushing-out information (CBGFI).
13. The terminal of claim 11 , wherein
all of the signal is received from the second TRP.
14. The terminal of claim 11 , wherein the at least the part of the signal is mapped to a same codeword.
15. The terminal of claim 11 ,
wherein the CDM group of the second TRP comprises at least one demodulation reference signal (DMRS) port associated with the second TRP, and
wherein the controller is configured to demodulate the at least the part of the signal received from the second TRP based on the at least one DMRS port.
16. A base station in a wireless communication system, the base station comprising:
a transceiver; and
a controller configured to:
generate control information for scheduling downlink transmission using at least one transmission reception point (TRP), wherein the control information indicates that at least a part of a signal, transmitted by a first TRP of the at least one TRP, is retransmitted by a second TRP of the at least one TRP and indicates a code division multiplexing (CDM) group of the second TRP for transmitting the at least the part of the signal,
transmit, to a terminal via the transceiver, the control information, and
transmit, to the terminal, the at least the part of the signal using the second TRP based on the CDM group of the second TRP.
17. The base station of claim 16 , wherein the control information comprises at least one of information on the CDM group of the TRP, demodulation reference signal (DMRS) port information indicating at least one DMRS port corresponding to the CDM group of the second TRP, modulation and coding scheme (MCS) information, a new data indicator (NDI), code block group transmission information (CBGTI), or code block group flushing-out information (CBGFI).
18. The base station of claim 16 , wherein
all of the signal is transmitted to the terminal using the second TRP.
19. The base station of claim 16 , wherein the at least the part of the signal is mapped to a same codeword.
20. The base station of claim 16 ,
wherein the CDM group of the second TRP comprises at least one demodulation reference signal (DMRS) port associated with the second TRP, and
wherein the at least the part of the signal transmitted from the second TRP is demodulated based on the at least one DMRS port.