Methods and devices for transmitting and receiving data, communication apparatus and system, and storage medium
A transmitting and receiving point (TRP) divides data scheduled by one downlink control information (DCI) into N data parts, and transmits the N data parts to a receiving side, where N≥1. A value of N and whether the N data parts have a correlation in a case of N>1 are determined by at least one of following scheduling information: a transmission configuration indicator (TCI) field, a demodulation reference signal (DMRS) port indicator, a modulation and coding scheme (MCS), a redundancy version (RV) or a new data indicator (NDI). After receiving the N data parts sent by the TRP, the receiving side determines whether the N data parts have the correlation according to at least one of the TCI, the DMRS port indicator, the MCS, the RV, or the NDI.
1. A data sending method, comprising:
transmitting, from a base station to a User Equipment (UE), a demodulation reference signal (DMRS) port indicator and a transmission configuration indicator (TCI) field;
wherein whether N data parts of a physical downlink shared channel (PDSCH) transmission transmitted by the base station are correlated in a case of N>1 is determined according to the DMRS port indicator and the TCI field, N being an integer greater than or equal to one;
wherein a value of N is determined according to the DMRS port indicator and the TCI field:
wherein each data part of the N data parts corresponds at least to one DMRS port group; or one transport block (“TB”); and
transmitting the PDSCH transmission.
2. The data sending method of claim 1 , wherein the N data parts are correlated when one data part is repeated with another data part.
3. The data sending method according to claim 1 , wherein the value of N is equal to R, and R is a number of TCIs indicated by the TCI field.
4. The data sending method of claim 3 , wherein in a case of R>1, the UE is notified whether the N data parts have the correlation by using the DMRS port indicator.
5. The data sending method of claim 4 , wherein a mapping relationship of the DMRS port indicator corresponding to the case of R>1 is different from a mapping relationship of the DMRS port indicator corresponding to a case of R=1.
6. The data sending method of claim 4 , wherein in a case where the DMRS port indicator characterizes that the N data parts have the correlation, the N data parts correspond to N TBs.
7. The data sending method of claim 5 , wherein a size of TB is about half of the size obtained according to DCI indicating resource.
8. The data sending method of claim 6 , wherein a predefined relationship is satisfied between redundancy versions (“RVs”) of the N TBs.
9. The data sending method of claim 8 , a relationship between RVs of a first TB of the N TBs and a second TB of the N TBs is be predefined as:
when RV of first TB is 0, RV of second TB is 2;
when RV of first TB is 2, RV of second TB is 3;
when RV of first TB is 3, RV of second TB is 1; and
when RV of first TB is 1, RV of second TB is0.
10. A data receiving method, comprising:
receiving a demodulation reference signal (DMRS) port indicator and a transmission configuration indicator (TCI) field from a base station;
determining whether N data parts of a physical downlink shared channel (PDSCH) transmission sent by the base station are correlated in a case of N>1 according to the DMRS port indicator and the TCI field, N being an integer greater than or equal to one;
wherein a value of N is determined according to the DMRS port indicator and the TCI field;
wherein each data part of the N data parts corresponds at least to one DMRS port group or one transport block (“TB”) of the; and
receiving the PDSCH transmission based on the determination.
11. The data receiving method of claim 10 , wherein the N data parts are correlated when one data part is repeated with another data part.
12. The data receiving method of claim 10 , wherein the value of N is R, and R is a number of TCIs indicated by the TCI field.
13. The data receiving method of claim 12 , wherein in a case of R>1, whether the N data parts have the correlation is determined according to the DMRS port indicator.
14. The data receiving method of claim 13 , wherein in a case where the DMRS port indicator characterizes that the N data parts have the correlation, the N data parts correspond to N TBs.
15. The data receiving method of claim 14 , wherein a mapping relationship of the DMRS port indicator corresponding to the case of R>1 is different from a mapping relationship of the DMRS port indicator corresponding to a case of R=1.
16. The data receiving method of claim 14 , wherein a predefined relationship is satisfied between redundancy versions (“RVs”) of the N TBs.
17. The data receiving method of claim 16 , wherein a size of TB is about half of the size obtained according to DCI indicating resource.
18. The data sending method of claim 17 , a relationship between RVs of a first TB of the N TBs and a second TB of the N TBs is be predefined as:
when RV of first TB is 0, RV of second TB is 2;
when RV of first TB is 2, RV of second TB is 3;
when RV of first TB is 3, RV of second TB is 1; and
when RV of first TB is 1, RV of second TB is 0.
19. A communication device, comprising a processor and a memory, wherein the processor is configured to execute a data sending program stored in the memory to implement the steps of the data sending method of claim 1 .
20. A communication device, comprising a processor and a memory, wherein the processor is configured to execute a data receiving program stored in the memory to implement the steps of the data receiving method of claim 10 .