Communication method and communications device

1. A communication method, wherein the method comprises:

receiving configuration information sent by a base station, wherein the configuration information comprises information about a first signal and quasi-co-location relationship information, and the quasi-co-location relationship information indicates that there is a quasi-co-location relationship between a port for sending the first signal and a port for sending a second signal, and wherein the information about the first signal comprises beam information about a beam for receiving the first signal, and wherein the quasi-co-location relationship information indicates that the quasi-co-location relationship is between the port that sends a synchronization signal block, and the port that sends a channel state information reference signal (CSI-RS) signal, and wherein the configuration information further comprises a measurement time window for averaging measurement values of the second signal;

determining, based on the beam information, that a spatial quasi-co-location relationship exists between the port for sending the first signal and the port for sending the second signal; and

obtaining a measurement quantity of the first signal based on a measurement quantity of the second signal and the quasi-co-location relationship information and the determination that the spatial quasi-co-location relationship exists between the port for sending the first signal and the port for sending the second signal and the measurement time window in the configuration information.

2. The method according to claim 1 , wherein:

the measurement quantity of the first signal or the measurement quantity of the second signal comprises at least one of the following information: a spatial parameter, an average gain, delay spread, Doppler spread, Doppler frequency shift, or an average delay.

3. The method according to claim 1 , wherein:

the quasi-co-location relationship information comprises information about a quasi-co-location relationship that is with respect to an average gain and that is between the port for sending the first signal and the port for sending the second signal; and

the obtaining a measurement quantity of the first signal based on a measurement quantity of the second signal and the quasi-co-location relationship information comprises:

obtaining an average gain of the first signal based on an average gain of the second signal and the quasi-co-location relationship.

4. The method according to claim 3 , wherein the obtaining an average gain of the first signal comprises:

using a value of the average gain of the second signal as a value of the average gain of the first signal; or

separately obtaining an average gain of the first signal and an average gain of the second signal, and using an average gain obtained after averaging or federated filtering of the average gain of the first signal and the average gain of the second signal as the average gain of the first signal.

5. The method according to claim 1 , wherein the quasi-co-location relationship information comprises information about a quasi-co-location relationship with respect to delay spread, Doppler spread, Doppler frequency shift, or an average delay, and the method further comprises:

obtaining delay spread, Doppler spread, Doppler frequency shift, or an average delay of the first signal based on delay spread, Doppler spread, Doppler frequency shift, or an average delay of the second signal and the quasi-co-location relationship that is with respect to an average gain and that is between the port for sending the first signal and the port for sending the second signal.

6. The method according to claim 1 , wherein the method further comprises:

receiving a correspondence that is between beam information and a downlink signal identifier and that is sent by the base station; and

establishing, based on the correspondence, a correspondence between the beam information, the downlink signal identifier, and a receive beam or a spatial parameter.

7. The method according to claim 6 , wherein the beam information of the first signal is information represented by a beam identifier, and the method further comprises:

when the configuration information is received by using signaling that controls downlink transmission, determining, based on a pre-established correspondence between a beam identifier and a downlink signal identifier, that a receive beam corresponding to a downlink signal identifier corresponding to a received beam identifier is the receive beam for receiving the first signal.

8. A terminal device, comprising a receiver, at least one processor, and one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:

receive, through the receiver, configuration information sent by a base station, wherein the configuration information comprises information about a first signal and quasi-co-location relationship information, and the quasi-co-location relationship information indicates that there is a quasi-co-location relationship between a port for sending the first signal and a port for sending a second signal, and wherein the information about the first signal comprises beam information about a beam for receiving the first signal, and wherein the quasi-co-location relationship information indicates that the quasi-co-location relationship is between the port that sends a synchronization signal block, and the port that sends a channel state information reference signal (CSI-RS) signal, and wherein the configuration information further comprises a measurement time window for averaging measurement values of the second signal;

determine, based on the beam information, that a spatial quasi-co-location relationship exists between the port for sending the first signal and the port for sending the second signal; and

obtain a measurement quantity of the first signal based on a measurement quantity of the second signal and the quasi-co-location relationship information and the determination that the spatial quasi-co-location relationship exists between the port for sending the first signal and the port for sending the second signal and the measurement time window in the configuration information.

9. The terminal device according to claim 8 , wherein:

the measurement quantity of the first signal or the measurement quantity of the second signal comprises at least one of the following information: a spatial parameter, an average gain, delay spread, Doppler spread, Doppler frequency shift, or an average delay.

10. The terminal device according to claim 8 , wherein:

the quasi-co-location relationship information comprises information about a quasi-co-location relationship that is with respect to an average gain and that is between the port for sending the first signal and the port for sending the second signal; and

the one or more memories store programming instructions for execution by the at least one processor to obtain an average gain of the first signal based on an average gain of the second signal and the quasi-co-location relationship.

11. The terminal device according to claim 10 , wherein the obtaining an average gain of the first signal comprises:

using a value of the average gain of the second signal as a value of the average gain of the first signal; or

separately obtaining an average gain of the first signal and an average gain of the second signal, and using an average gain obtained after averaging or federated filtering of the average gain of the first signal and the average gain of the second signal as the average gain of the first signal.

12. The terminal device according to claim 8 , wherein the quasi-co-location relationship information comprises information about a quasi-co-location relationship with respect to delay spread, Doppler spread, Doppler frequency shift, or an average delay; and the one or more memories store programming instructions for execution by the at least one processor to obtain delay spread, Doppler spread, Doppler frequency shift, or an average delay of the first signal based on delay spread, Doppler spread, Doppler frequency shift, or an average delay of the second signal and the quasi-co-location relationship that is with respect to an average gain and that is between the port for sending the first signal and the port for sending the second signal.

13. The terminal device according to claim 8 , wherein the one or more memories store programming instructions for execution by the at least one processor to:

receive, through the receiver, a correspondence that is between beam information and a downlink signal identifier and that is sent by the base station; and

establish, based on the correspondence, a correspondence between the beam information, the downlink signal identifier, and a receive beam or a spatial parameter.

14. The terminal device according to claim 13 , wherein the beam information of the first signal is information represented by a beam identifier, and the one or more memories store programming instructions for execution by the at least one processor to: when the configuration information is received by using signaling that controls downlink transmission, determine, based on a pre-established correspondence between a beam identifier and a downlink signal identifier, that a receive beam corresponding to a downlink signal identifier corresponding to a received beam identifier is the receive beam for receiving the first signal.

15. A non-transitory computer-readable medium storing computer instructions, that when executed by one or more processors, cause a computer to perform operations comprising:

receiving configuration information sent by a base station, wherein the configuration information comprises information about a first signal and quasi-co-location relationship information, and the quasi-co-location relationship information indicates that there is a quasi-co-location relationship between a port for sending the first signal and a port for sending a second signal, and wherein the information about the first signal comprises beam information about a beam for receiving the first signal, and wherein the quasi-co-location relationship information indicates that the quasi-co-location relationship is between the port that sends a synchronization signal block, and the port that sends a channel state information reference signal (CSI-RS) signal, and wherein the configuration information further comprises a measurement time window for averaging measurement values of the second signal;

determining, based on the beam information, that a spatial quasi-co-location relationship exists between the port for sending the first signal and the port for sending the second signal; and

obtaining a measurement quantity of the first signal based on a measurement quantity of the second signal and the quasi-co-location relationship information and the determination that the spatial quasi-co-location relationship exists between the port for sending the first signal and the port for sending the second signal, and the measurement time window in the configuration information.