Parameter configuration method and communications apparatus
This application provides a parameter configuration method and a communications apparatus. The method includes: receiving, by a terminal device, an indication of a first mapping relationship from a network device, where the first mapping relationship is a mapping relationship in a preconfigured first mapping relationship group, and the first mapping relationship group includes at least one mapping relationship, to indicate at least one correspondence between a reporting quantity of spatial domain vectors and a reporting quantity of frequency domain vectors; and determining, by the terminal device, the reporting quantity of spatial domain vectors and the reporting quantity of frequency domain vectors based on the first mapping relationship.
1. A parameter configuration method, comprising:
receiving an indication of a first mapping relationship, wherein the first mapping relationship is a mapping relationship in a preconfigured first mapping relationship group, the preconfigured first mapping relationship group comprises the first mapping relationship, and the first mapping relationship indicates a pair of a first value indicating a reporting quantity L 0 of spatial domain vectors and a second value indicating a reporting quantity M 0 of frequency domain vectors;
determining the reporting quantity L 0 of spatial domain vectors and the reporting quantity M 0 of frequency domain vectors based on the first mapping relationship, wherein both L 0 and M 0 are positive integers; and
determining, based on the reporting quantity L 0 of spatial domain vectors and the reporting quantity M 0 of frequency domain vectors, a quantity K 0 of space-frequency vector pairs for constructing a precoding vector, wherein:
K 0 ≤2L 0 ×M 0 , and K 0 is a positive integer;
2L 0 ×M 0 represents a sum of quantities of space-frequency vector pairs constructed in two polarization directions separately by using the L 0 spatial domain vectors and the M 0 frequency domain vectors; and
K 0 represents a sum of quantities of space-frequency vector pairs that are in the two polarization directions and that are for constructing the precoding vector.
2. The method according to claim 1 , wherein the first mapping relationship further indicates a combination of the reporting quantity L 0 of spatial domain vectors, the reporting quantity M 0 of frequency domain vectors and a ratio between K 0 and 2L 0 ×M 0 .
3. The method according to claim 2 , wherein the ratio between K 0 and 2L 0 ×M 0 is one of the following: 1/4, 1/2 or 3/4.
4. The method according to claim 1 , wherein the method further comprises:
determining a reporting quantity of space-frequency vector pairs, wherein the reporting quantity of space-frequency vector pairs is smaller than or equal to K 0 .
5. The method according to claim 1 , wherein the method further comprises:
receiving the indication of the first mapping relationship through radio resource control (RRC) signaling.
6. A communications apparatus, comprising:
at least one processor configured with processor-executable instructions to perform operations comprising:
receiving an indication of a first mapping relationship, wherein the first mapping relationship is a mapping relationship in a preconfigured first mapping relationship group, the preconfigured first mapping relationship group comprises the first mapping relationship, and the first mapping relationship indicates a pair of a first value indicating a reporting quantity L 0 of spatial domain vectors and a second value indicating a reporting quantity M 0 of frequency domain vectors;
determining the reporting quantity L 0 of spatial domain vectors and the reporting quantity M 0 of frequency domain vectors based on the first mapping relationship, wherein both L 0 and M 0 are positive integers; and
determining, based on the reporting quantity L 0 of spatial domain vectors and the reporting quantity M 0 of frequency domain vectors, a quantity K 0 of space-frequency vector pairs for constructing a precoding vector, wherein:
K 0 ≤2L 0 ×M 0 , and K 0 is a positive integer;
2L 0 ×M 0 represents a sum of quantities of space-frequency vector pairs constructed in two polarization directions separately by using the L 0 spatial domain vectors and the M 0 frequency domain vectors; and
K 0 represents a sum of quantities of space-frequency vector pairs that are in the two polarization directions and that are for constructing the precoding vector.
7. The communications apparatus according to claim 6 , wherein the first mapping relationship further indicates a combination of the reporting quantity L 0 of spatial domain vectors, the reporting quantity M 0 of frequency domain vectors and a ratio between K 0 and 2L 0 ×M 0 .
8. The communications apparatus according to claim 7 , wherein the ratio between K 0 and 2L 0 ×M 0 is one of the following: 1/4, 1/2 or 3/4.
9. The communications apparatus according to claim 6 , wherein the at least one processor is configured with processor-executable instructions to perform operations comprising:
determining a reporting quantity of space-frequency vector pairs, wherein the reporting quantity of space-frequency vector pairs is smaller than or equal to K 0 .
10. The communications apparatus according to claim 6 , wherein the at least one processor is configured with processor-executable instructions to perform operations comprising:
receiving the indication of the first mapping relationship through radio resource control (RRC) signaling.
11. A non-transitory computer-readable storage medium storing computer instructions, that when executed by at least one processor, cause the at least one processor to perform operations comprising:
receiving an indication of a first mapping relationship, wherein the first mapping relationship is a mapping relationship in a preconfigured first mapping relationship group, the preconfigured first mapping relationship group comprises the first mapping relationship, and the first mapping relationship indicates a pair of a first value indicating a reporting quantity L 0 of spatial domain vectors and a second value indicating a reporting quantity M 0 of frequency domain vectors;
determining the reporting quantity L 0 of spatial domain vectors and the reporting quantity M 0 of frequency domain vectors based on the first mapping relationship, wherein both L 0 and M 0 are positive integers; and
determining, based on the reporting quantity L 0 of spatial domain vectors and the reporting quantity M 0 of frequency domain vectors, a quantity K 0 of space-frequency vector pairs for constructing a precoding vector, wherein:
K 0 ≤2L 0 ×M 0 , and K 0 is a positive integer;
2L 0 ×M 0 represents a sum of quantities of space-frequency vector pairs constructed in two polarization directions separately by using the L 0 spatial domain vectors and the M 0 frequency domain vectors; and
K 0 represents a sum of quantities of space-frequency vector pairs that are in the two polarization directions and that are for constructing the precoding vector.
12. The non-transitory computer-readable storage medium according to claim 11 , wherein the first mapping relationship further indicates a combination of the reporting quantity L 0 of spatial domain vectors, the reporting quantity M 0 of frequency domain vectors and a ratio between K 0 and 2L 0 ×M 0 .
13. The non-transitory computer-readable storage medium according to claim 12 , wherein the ratio between K 0 and 2L 0 ×M 0 is one of the following: 1/4, 1/2 or 3/4.
14. The non-transitory computer-readable storage medium according to claim 11 , wherein the non-transitory computer-readable storage medium stores computer instructions, that when executed by the at least one processor, cause the at least one processor to perform operations comprising:
determining a reporting quantity of space-frequency vector pairs, wherein the reporting quantity of space-frequency vector pairs is smaller than or equal to K 0 .
15. The non-transitory computer-readable storage medium according to claim 11 , wherein the non-transitory computer-readable storage medium stores computer instructions, that when executed by the at least one processor, cause the at least one processor to perform operations comprising:
receiving the indication of the first mapping relationship through radio resource control (RRC) signaling.