Beam indication method and apparatus

1. A beam indication method, comprising:

receiving first information from a network device, wherein the first information is used to determine both a first receive beam for a downlink signal and a first transmit beam for an uplink signal, wherein the first information comprises third reference signal configuration information and fourth reference signal configuration information, wherein the third reference signal configuration information indicates an identifier of a third downlink reference signal, and wherein the fourth reference signal configuration information indicates an identifier of a first uplink reference signal; and

determining the first receive beam for the downlink signal and the first transmit beam for the uplink signal based on the first information, wherein the determining the first receive beam and the first transmit beam based on the first information comprises performing at least one of:

determining the third downlink reference signal based on the third reference signal configuration information, and determining the first receive beam based on the third downlink reference signal; or

determining the first uplink reference signal based on the fourth reference signal configuration information, and determining the first transmit beam based on the first uplink reference signal.

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

receiving second information from the network device, wherein the second information indicates at least one of a second receive beam for the downlink signal or a second transmit beam for the uplink signal; and

performing at least one of receiving the downlink signal from the network device by using the second receive beam, or sending the uplink signal to the network device by using the second transmit beam.

3. The method according to claim 1 , wherein the first information indicates the first receive beam for the downlink signal; and

wherein the method further comprises determining the first transmit beam for the uplink signal based on a signal in the downlink signal.

4. A communications apparatus, comprising:

a transceiver;

a processor; and

a non-transitory computer readable medium having stored thereon a program for execution by the processor, the program including instructions to:

receive, through the transceiver, first information from a network device, wherein the first information is used to determine both a first receive beam for a downlink signal and a first transmit beam for an uplink signal, wherein the first information comprises third reference signal configuration information and fourth reference signal configuration information, wherein the third reference signal configuration information indicates an identifier of a third downlink reference signal, and wherein the fourth reference signal configuration information indicates an identifier of a first uplink reference signal; and

determine the first receive beam for the downlink signal and the first transmit beam for the uplink signal based on the first information received by the transceiver, wherein the instructions to determine the first receive beam for the downlink signal and the first transmit beam for the uplink signal include instructions to perform at least one of:

determine the third downlink reference signal based on the third reference signal configuration information, and determine the first receive beam based on the third downlink reference signal; or

determine the first uplink reference signal based on the fourth reference signal configuration information, and determine the first transmit beam based on the first uplink reference signal.

5. The communications apparatus according to claim 4 , wherein the program further includes instructions to:

receive, through the transceiver, second information from the network device, wherein the second information indicates at least one of a second receive beam for the downlink signal or a second transmit beam for the uplink signal; and

perform at least one of receive, through the transceiver, from the network device, the downlink signal using the second receive beam, or send, through the transceiver, to the network device, the uplink signal using the second transmit beam.

6. The communications apparatus according to claim 4 , wherein the first information indicates the first receive beam for the downlink signal; and

wherein the program further includes instructions to determine the first transmit beam for the uplink signal based on a signal in the downlink signal.