Method and apparatus for data transmission and reception for network coordinated communication
The 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 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. A method and an apparatus for transmitting and receiving data for coordination communication is provided.
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a first transmission and reception point (TRP), first downlink control information (DCI) scheduling a first physical downlink shared channel (PDSCH);
receiving, from a second TRP, second DCI scheduling a second PDSCH, wherein the first PDSCH and the second PDSCH are fully or partially overlapped in a time-frequency domain; and
receiving, from the first TRP, the first PDSCH based on a first demodulation reference signal (DMRS); and
receiving, from the second TRP, the second PDSCH based on a second DMRS,
wherein a number of front-loaded DMRS symbol, a number of additional DMRS symbol, a DMRS symbol location and a DMRS configuration type are same for the first DMRS and the second DMRS.
2. The method of claim 1 , further comprising:
in case that a first antenna ports field for the first DMRS and a second antenna ports field for the second DMRS indicate a different value, decoding the first PDSCH and the second PDSCH with a same priority,
wherein the first DCI includes the first antenna ports field, and
wherein the second DCI includes the second antenna ports field.
3. The method of claim 2 , wherein the first PDSCH and the second PDSCH are data transmissions of a non-coherent joint transmission (NC-JT) between the first TRP and the second TRP.
4. The method of claim 3 , wherein a multiple user (MU) multiple input multiple output (MIMO) is not applied to the terminal, in case that the data transmissions of the NC-JT are received.
5. A method performed by a first transmission and reception point (TRP) in a wireless communication system, the method comprising:
transmitting, to a terminal, first downlink control information (DCI) scheduling a first physical downlink shared channel (PDSCH); and
transmitting, to the terminal, the first PDSCH based on a first demodulation reference signal (DMRS),
wherein second DCI scheduling a second PDSCH is transmitted to the terminal from a second TRP,
wherein the second PDSCH is transmitted to the terminal based on a second DMRS,
wherein the first PDSCH and the second PDSCH are fully or partially overlapped in a time-frequency domain, and
wherein a number of front-loaded DMRS symbol, a number of additional DMRS symbol, a DMRS symbol location and a DMRS configuration type are same for the first DMRS and the second DMRS.
6. The method of claim 5 ,
wherein, in case that a first antenna ports field for the first DMRS and a second antenna ports field for the second DMRS indicate a different value, the first PDSCH and the second PDSCH are decoded with a same priority at the terminal,
wherein the first DCI includes the first antenna ports field, and
wherein the second DCI includes the second antenna ports field.
7. The method of claim 6 , wherein the first PDSCH and the second PDSCH are data transmissions of a non-coherent joint transmission (NC-JT) between the first TRP and the second TRP.
8. The method of claim 7 , wherein a multiple user (MU) multiple input multiple output (MIMO) is not applied to the terminal, in case that the data transmissions of the NC-JT are transmitted.
9. A terminal in a wireless communication system, the terminal comprising:
a transceiver configured to transmit and receive a signal; and
a processor configured to:
receive, from a first transmission and reception point (TRP), first downlink control information (DCI) scheduling a first physical downlink shared channel (PDSCH),
receive, from a second TRP, second DCI scheduling a second PDSCH, wherein the first PDSCH and the second PDSCH are fully or partially overlapped in a time-frequency domain, and
receive, from the first TRP, the first PDSCH based on a first demodulation reference signal (DMRS), and
receive, from the second TRP, the second PDSCH based on a second DMRS,
wherein a number of front-loaded DMRS symbol, a number of additional DMRS symbol, a DMRS symbol location and a DMRS configuration type are same for the first DMRS and the second DMRS.
10. The terminal of claim 9 , wherein the processor is further configured to:
in case that a first antenna ports field for the first DMRS and a second antenna ports field for the second DMRS indicate a different value, decode the first PDSCH and the second PDSCH with a same priority,
wherein the first DCI includes the first antenna ports field, and
wherein the second DCI includes the second antenna ports field.
11. The terminal of claim 10 , wherein the first PDSCH and the second PDSCH are data transmissions of a non-coherent joint transmission (NC-JT) between the first TRP and the second TRP.
12. The terminal of claim 11 , wherein a multiple user (MU) multiple input multiple output (MIMO) is not applied to the terminal, in case that the data transmissions of the NC-JT are received.
13. A first transmission and reception point (TRP) in a wireless communication system, the first TRP comprising:
a transceiver configured to transmit and receive a signal; and
a processor configured to:
transmit, to a terminal, first downlink control information (DCI) scheduling a first physical downlink shared channel (PDSCH), and
transmit, to the terminal, the first PDSCH based on a first demodulation reference signal (DMRS),
wherein second DCI scheduling a second PDSCH is transmitted to the terminal from a second TRP,
wherein the second PDSCH is transmitted to the terminal based on a second DMRS,
wherein the first PDSCH and the second PDSCH are fully or partially overlapped in a time-frequency domain, and
wherein a number of front-loaded DMRS symbol, a number of additional DMRS symbol, a DMRS symbol location and a DMRS configuration type are same for the first DMRS and the second DMRS.
14. The first TRP of claim 13 ,
wherein, in case that a first antenna ports field for the first DMRS and a second antenna ports field for the second DMRS indicate a different value, the first PDSCH and the second PDSCH are decoded with a same priority at the terminal,
wherein the first DCI includes the first antenna ports field, and
wherein the second DCI includes the second antenna ports field.
15. The first TRP of claim 14 , wherein the first PDSCH and the second PDSCH are data transmissions of a non-coherent joint transmission (NC-JT) between the first TRP and the second TRP.
16. The first TRP of claim 15 , wherein a multiple user (MU) multiple input multiple output (MIMO) is not applied to the terminal, in case that the data transmissions of the NC-JT are transmitted.