Wireless communication method and apparatus and communication device
This disclosure provides example wireless communication methods and communication apparatuses. One example method includes that a network device sends indication information of m first symbol groups used for repeated transmission of a first transport block (TB) to a terminal. The terminal and the network device determine, according to a same rule, a quasi co-location (QCL) assumption corresponding to each of second symbol groups actually used when the first TB is sent or received.
1. A wireless communication method, comprising:
receiving, by a terminal device, first indication information, wherein the first indication information indicates m first symbol groups, and m is an integer greater than or equal to 2, wherein the m first symbol groups are used for repeated transmission of a first transport block (TB), and wherein each first symbol group comprises at least one symbol;
determining, by the terminal device, a quasi co-location (QCL) assumption corresponding to each of n second symbol groups based on a first mapping relationship, wherein the n second symbol groups are symbol groups actually used when the terminal device sends or receives the first TB, and n is an integer greater than or equal to 1;
communicating, by the terminal device, the first TB by using the n second symbol groups and the QCL assumption corresponding to each of the n second symbol groups; and
receiving, by the terminal device, second indication information,
wherein the second indication information indicates P QCL assumptions, and P is an integer greater than 1; and
the first mapping relationship is a correspondence between the n second symbol groups and the P QCL assumptions.
2. The method according to claim 1 , wherein the method further comprises:
receiving, by the terminal device, third indication information, wherein the third indication information indicates a discarded first symbol group in the m first symbol groups, and wherein the n second symbol groups do not comprise a symbol in the discarded first symbol group in the m first symbol groups.
3. The method according to claim 1 , wherein symbol distribution of the n second symbol groups is different from symbol distribution of the m first symbol groups.
4. The method according to claim 1 , wherein each of the n second symbol groups is further used to carry a demodulation reference signal (DMRS), and wherein a QCL assumption of the DMRS is the same as a QCL assumption corresponding to a second symbol group carrying the DMRS.
5. The method according to claim 1 , wherein a QCL assumption corresponding to each second symbol group indicates a spatial characteristic parameter of a reference signal corresponding to the second symbol group.
6. A communication apparatus, comprising at least one processor and one or more memories are coupled to the at least one processor and storing programming instructions for execution by the at least one processor to perform operations comprising:
receiving first indication information, wherein the first indication information indicates m first symbol groups, and m is an integer greater than or equal to 2, wherein the m first symbol groups are used for repeated transmission of a first transport block (TB), and wherein each first symbol group comprises at least one symbol;
determining a quasi co-location (QCL) assumption corresponding to each of n second symbol groups based on a first mapping relationship, wherein the n second symbol groups are symbol groups used when the communication apparatus sends or receives the first TB, and n is an integer greater than or equal to 1;
communicating the first TB by using the n second symbol groups and the QCL assumption corresponding to each of the n second symbol groups; and
receiving second indication information,
wherein the second indication information indicates P QCL assumptions, and P is an integer greater than 1; and
the first mapping relationship is a correspondence between the n second symbol groups and the P QCL assumptions.
7. The communication apparatus according to claim 6 , wherein the operations further comprises:
receiving third indication information, wherein the third indication information indicates a discarded first symbol group in the m first symbol groups, and wherein the n second symbol groups do not comprise a symbol in the discarded first symbol group in the m first symbol groups.
8. The communication apparatus according to claim 6 , wherein symbol distribution of the n second symbol groups is different from symbol distribution of the m first symbol groups.
9. The communication apparatus according to claim 6 , wherein each of the n second symbol groups is further used to carry a demodulation reference signal (DMRS), and wherein a QCL assumption of the DMRS is the same as a QCL assumption corresponding to a second symbol group carrying the DMRS.
10. The communication apparatus according to claim 6 , wherein a QCL assumption corresponding to each second symbol group indicates a spatial characteristic parameter of a reference signal corresponding to the second symbol group.
11. The communication apparatus according to claim 6 , wherein the communication apparatus is a terminal device, a chip or a chip system.
12. A communication apparatus, comprising at least one processor and one or more memories are coupled to the at least one processor and storing programming instructions for execution by the at least one processor to perform operations comprising:
sending first indication information, wherein the first indication information indicates m first symbol groups, and m is an integer greater than or equal to 2, wherein the m first symbol groups are used for repeated transmission of a first transport block (TB), and wherein each first symbol group comprises at least one symbol;
determining a quasi co-location (QCL) assumption corresponding to each of n second symbol groups based on a first mapping relationship, wherein the n second symbol groups are symbol groups used when the communication apparatus sends or receives the first TB, and n is an integer greater than or equal to 1;
communicating the first TB by using the n second symbol groups and the QCL assumption corresponding to each of the n second symbol groups; and
sending second indication information,
wherein the second indication information indicates P QCL assumptions, and P is an integer greater than 1; and
the first mapping relationship is a correspondence between the n second symbol groups and the P QCL assumptions.
13. The communication apparatus according to claim 12 , wherein the operations further comprises:
sending third indication information, wherein the third indication information indicates a discarded first symbol group in the m first symbol groups, and wherein the n second symbol groups do not comprise a symbol in the discarded first symbol group in the m first symbol groups.
14. The communication apparatus according to claim 12 , wherein symbol distribution of the n second symbol groups is different from symbol distribution of the m first symbol groups.
15. The communication apparatus according to claim 12 , wherein each of the n second symbol groups is further used to carry a demodulation reference signal (DMRS), and wherein a QCL assumption of the DMRS is the same as a QCL assumption corresponding to a second symbol group carrying the DMRS.
16. The communication apparatus according to claim 12 , wherein a QCL assumption corresponding to each second symbol group indicates a spatial characteristic parameter of a reference signal corresponding to the second symbol group.
17. The communication apparatus according to claim 12 , wherein the communication apparatus is a network device, a chip or a chip system.