Communication method and communication apparatus
A communication method includes receiving first signaling. The first signaling indicates a first reference signal resource. The first reference signal resource corresponds to P antenna ports. The method also includes receiving first indication information. The method further includes determining, by a processor, based on the first indication information, Q antenna ports that are in the P antenna ports and that are used to determine channel state information (CSI). Both P and Q are positive integers and P>Q.
1. A communication method, comprising:
receiving first signaling, wherein the first signaling indicates a first reference signal resource, and the first reference signal resource corresponds to P antenna ports;
receiving first indication information, wherein the first indication information indicates a first energy saving mode of a plurality of energy saving modes; and
in response to receiving the first indication information indicating the first energy saving mode, determining, by a processor, based on the first energy saving mode, Q antenna ports associated with the first energy saving mode, wherein the Q antenna ports are in the P antenna ports, and the Q antenna ports are used to determine channel state information (CSI),
wherein both P and Q are positive integers and P>Q.
2. The communication method according to claim 1 , wherein the first indication information indicates the Q antenna ports.
3. The communication method according to claim 1 , wherein the communication method further comprises:
determining the CSI based on the Q antenna ports and first dimension information, wherein
the first dimension information indicates that a first quantity of first-dimension antenna ports is B1 and a second quantity of second-dimension antenna ports is B2, and both B1 and B2 are positive integers,
C1 is a third quantity of first-dimension antenna ports indicated by first codebook configuration information associated with the first reference signal resource,
C2 is a fourth quantity of second-dimension antenna ports indicated by the first codebook configuration information, and
B1=C1, and B2<C2; or
B1<C1, and B2−C2; or
B1<C1, and B2<C2.
4. The communication method according to claim 1 , wherein
P=2*P1*P2, where P1 is a first quantity of first-dimension antenna ports and P2 is a second quantity of second-dimension antenna ports,
Q=2*Q1*Q2, where Q1 is a third quantity of first-dimension antenna ports and Q2 is a fourth quantity of second-dimension antenna ports,
P1, P2, Q1, and Q2 are all positive integers, and
Q1=P1, and Q2<P2; or
Q1<P1, and Q2<P2.
5. The communication method according to claim 1 , wherein
the P antenna ports are grouped into 2*A1 groups in ascending order of antenna port indexes, and each group comprises A2 antenna ports, where A1 is a positive integer, and A2 is an integer greater than or equal to 2, and
Q/(2*A1) antenna ports in each group of A2 antenna ports belong to the Q antenna ports.
6. A communication method, comprising:
sending first signaling, wherein the first signaling indicates a first reference signal resource, and the first reference signal resource corresponds to P antenna ports; and
sending first indication information, wherein the first indication information indicates a first energy saving mode of a plurality of energy saving modes to cause a terminal device to determine, based on the first energy saving mode, Q antenna ports associated with the first energy saving mode, wherein the Q antenna ports are in the P antenna ports, and the Q antenna ports are used to determine channel state information (CSI),
wherein both P and Q are positive integers and P>Q.
7. The communication method according to claim 6 , wherein the communication method further comprises:
sending first dimension information,
wherein
the first dimension information indicates that a first quantity of first-dimension antenna ports is B1 and a second quantity of second-dimension antenna ports is B2, and both B1 and B2 are positive integers,
C1 is a third quantity of first-dimension antenna ports indicated by first codebook configuration information associated with the first reference signal resource,
C2 is a fourth quantity of second-dimension antenna ports indicated by the first codebook configuration information, and
B1=C1, and B2<C2; or
B1<C1, and B2−C2; or
B1<C1, and B2<C2.
8. The communication method according to claim 6 , wherein
P=2*P1*P2, where P1 is a first quantity of first-dimension antenna ports and P2 is a second quantity of second-dimension antenna ports,
Q=2*Q1*Q2, where Q1 is a third quantity of first-dimension antenna ports and Q2 is a fourth quantity of second-dimension antenna ports,
P1, P2, Q1, and Q2 are all positive integers, and
Q1=P1, and Q2<P2; or
Q1<P1, and Q2<P2.
9. The communication method according to claim 6 , wherein
the P antenna ports are grouped into 2*A1 groups in ascending order of antenna port indexes, and each group comprises A2 antenna ports, where A1 is a positive integer, and A2 is an integer greater than or equal to 2, and
Q/(2*A1) antenna ports in each group of A2 antenna ports belong to the Q antenna ports.
10. A communication apparatus, comprising:
a non-transitory memory storage comprising instructions; and
one or more processors in communication with the memory storage, wherein the instructions, when executed by the one or more processors, cause the communication apparatus to:
receive first signaling, wherein the first signaling indicates a first reference signal resource, and the first reference signal resource corresponds to P antenna ports;
receive first indication information, wherein the first indication information indicates a first energy saving mode of a plurality of energy saving modes; and
in response to receiving the first indication information indicating the first energy saving mode, determine, based on the first energy saving mode, Q antenna ports associated with the first energy saving mode, wherein the Q antenna ports are in the P antenna ports, and the Q antenna ports are used to determine channel state information (CSI),
wherein both P and Q are positive integers and P>Q.
11. The communication apparatus according to claim 10 , wherein the first indication information indicates the Q antenna ports.
12. The communication apparatus according to claim 10 , wherein the instructions, when executed by the one or more processors, further cause the communication apparatus to:
determine the CSI based on the Q antenna ports and first dimension information, wherein
the first dimension information indicates that a first quantity of first-dimension antenna ports is B1 and a second quantity of second-dimension antenna ports is B2, and both B1 and B2 are positive integers,
C1 is a third quantity of first-dimension antenna ports indicated by first codebook configuration information associated with the first reference signal resource,
C2 is a fourth quantity of second-dimension antenna ports indicated by the first codebook configuration information, and
B1=C1, and B2<C2; or
B1<C1, and B2−C2; or
B1<C1, and B2<C2.
13. The communication apparatus according to claim 10 , wherein
P=2*P1*P2, P1 is a first quantity of first-dimension antenna ports and P2 is a second quantity of second-dimension antenna ports,
Q=2*Q1*Q2, where Q1 is a third quantity of first-dimension antenna ports and Q2 is a fourth quantity of second-dimension antenna ports,
P1, P2, Q1, and Q2 are all positive integers, and
Q1=P1, and Q2<P2; or
Q1<P1, and Q2<P2.
14. The communication apparatus according to claim 10 , wherein the P antenna ports are grouped into 2*A1 groups in ascending order of antenna port indexes, and each group comprises A2 antenna ports, where A1 is a positive integer, and A2 is an integer greater than or equal to 2, and
Q/(2*A1) antenna ports in each group of A2 antenna ports belong to the Q antenna ports.
15. The communication apparatus according to claim 14 , wherein that Q/(2*A1) antenna ports in each group of A2 antenna ports belong to the Q antenna ports comprises one of the following:
Q/(2*A1) antenna ports with larger indexes in each group of A2 antenna ports belong to the Q antenna ports;
Q/(2*A1) antenna ports with smaller indexes in each group of A2 antenna ports belong to the Q antenna ports;
Q/(2*A1) antenna ports with larger indexes in each group of A2 antenna ports in the first A1 groups of the 2*A1 groups belong to the Q antenna ports, and Q/(2*A1) antenna ports with smaller indexes in each group of A2 antenna ports in the last A1 groups of the 2*A1 groups belong to the Q antenna ports; or
Q/(2*A1) antenna ports with smaller indexes in each group of A2 antenna ports in the first A1 groups of the 2*A1 groups belong to the Q antenna ports, and Q/(2*A1) antenna ports with larger indexes in each group of A2 antenna ports in the last A1 groups of the 2*A1 groups belong to the Q antenna ports.
16. A communication apparatus, comprising:
a non-transitory memory storage comprising instructions; and
one or more processors in communication with the memory storage, wherein the instructions, when executed by the one or more processors, cause the communication apparatus to:
send first signaling, wherein the first signaling indicates a first reference signal resource, and the first reference signal resource corresponds to P antenna ports; and
send first indication information, wherein the first indication information indicates a first energy saving mode of a plurality of energy saving modes to cause a terminal device to determine, based on the first energy saving mode, Q antenna ports associated with the first energy saving mode, wherein the Q antenna ports are in the P antenna ports, and the Q antenna ports are used to determine channel state information (CSI),
wherein both P and Q are positive integers and P>Q.
17. The communication apparatus according to claim 16 , wherein the instructions, when executed by the one or more processors, further cause the communication apparatus to:
send first dimension information,
wherein
the first dimension information indicates that a first quantity of first-dimension antenna ports is B1 and a second quantity of second-dimension antenna ports is B2, and both B1 and B2 are positive integers,
C1 is a third quantity of first-dimension antenna ports indicated by first codebook configuration information associated with the first reference signal resource,
C2 is a fourth quantity of second-dimension antenna ports indicated by the first codebook configuration information, and
B1=C1, and B2<C2; or
B1<C1, and B2=C2; or
B1<C1, and B2<C2.
18. The communication apparatus according to claim 16 , wherein
P=2*P1*P2, where P1 is a first quantity of first-dimension antenna ports and P2 is a second quantity of second-dimension antenna ports,
Q=2*Q1*Q2, where Q1 is a third quantity of first-dimension antenna ports and Q2 is a fourth quantity of second-dimension antenna ports,
P1, P2, Q1, and Q2 are all positive integers, and
Q1=P1, and Q2<P2; or
Q1<P1, and Q2<P2.
19. The communication apparatus according to claim 16 , wherein
the P antenna ports are grouped into 2*A1 groups in ascending order of antenna port indexes, and each group comprises A2 antenna ports, where A1 is a positive integer, and A2 is an integer greater than or equal to 2, and
Q/(2*A1) antenna ports in each group of A2 antenna ports belong to the Q antenna ports.
20. The communication apparatus according to claim 19 , wherein that Q/(2*A1) antenna ports in each group of A2 antenna ports belong to the Q antenna ports comprises one of the following:
Q/(2*A1) antenna ports with larger indexes in each group of A2 antenna ports belong to the Q antenna ports;
Q/(2*A1) antenna ports with smaller indexes in each group of A2 antenna ports belong to the Q antenna ports;
Q/(2*A1) antenna ports with larger indexes in each group of A2 antenna ports in the first A1 groups of the 2*A1 groups belong to the Q antenna ports, and Q/(2*A1) antenna ports with smaller indexes in each group of A2 antenna ports in the last A1 groups of the 2*A1 groups belong to the Q antenna ports; or
Q/(2*A1) antenna ports with smaller indexes in each group of A2 antenna ports in the first A1 groups of the 2*A1 groups belong to the Q antenna ports, and Q/(2*A1) antenna ports with larger indexes in each group of A2 antenna ports in the last A1 groups of the 2*A1 groups belong to the Q antenna ports.