Beam indication method, network device, and terminal

1. A network device, comprising:

a processor, configured to obtain scheduling time information of at least one beam, wherein the scheduling time information of the at least one beam comprises a mapping relationship between a respective scheduling time of each beam of the at least one beam and the respective beam, or a respective scheduling time of each beam of the at least one beam, the scheduling time information of the at least one beam instructs a terminal to receive or send a signal at least one scheduling time indicated by the scheduling time information of the at least one beam, and the at least one beam comprises a first beam currently accessed by the terminal; and

a transceiver, configured to send first indication information to the terminal, wherein the first indication information indicates the scheduling time information of the at least one beam.

2. The network device according to claim 1 , wherein the at least one beam further comprises a second beam corresponding to the network device, wherein the second beam is different than the first beam.

3. The network device according to claim 1 , wherein:

before the processor obtains the scheduling time information of the at least one beam, the transceiver is further configured to receive a request message sent by the terminal, wherein the request message requests the network device to obtain the scheduling time information of the at least one beam; and

the processor is configured to obtain the scheduling time information of the at least one beam based on the request message.

4. The network device according to claim 1 , wherein:

after the transceiver sends the first indication information to the terminal, the transceiver is further configured to receive second indication information sent by the terminal, wherein the second indication information indicates that an error occurred when the network device sent first data using the first beam; and

the transceiver is further configured to resend the first data to the terminal using a second beam, wherein the second beam is comprised in the at least one beam.

5. The network device according to claim 1 , wherein the transceiver is further configured to:

send third indication information to the terminal, wherein the third indication information indicates that a beam currently accessed by the terminal needs to be switched from the first beam to a third beam.

6. The network device according to claim 5 , wherein the at least one beam further comprises the third beam.

7. A terminal, comprising:

a transceiver, configured to:

receive first indication information sent by a network device, wherein the first indication information indicates scheduling time information of at least one beam, the scheduling time information of the at least one beam comprises a mapping relationship between a respective scheduling time of each beam of the at least one beam and the respective beam, or a respective scheduling time of each beam of the at least one beam, the scheduling time information of the at least one beam instructs the terminal to receive or send a signal at at least one scheduling time indicated by the scheduling time information of the at least one beam, and the at least one beam comprises a first beam currently accessed by a terminal; and

receive or send, based on the first indication information, a signal at the at least one scheduling time indicated by the scheduling time information of the at least one beam.

8. The terminal according to claim 7 , wherein the at least one beam further comprises a second beam corresponding to the network device, wherein the second beam is different than the first beam.

9. The terminal according to claim 7 , wherein the transceiver is further configured to:

before receiving the first indication information sent by the network device, send a request message to the network device, wherein the request message requests the network device to obtain the scheduling time information of the at least one beam.

10. The terminal according to claim 7 , further comprising:

a processor;

wherein the transceiver is further configured to:

when it is determined that an error has occurred during receiving, by the terminal, of first data that is sent by the network device using the first beam, and after the transceiver sends or receives, based on the first indication information, the signal at the at least one scheduling time indicated by the scheduling time information of the at least one beam, send second indication information to the network device, wherein the second indication information indicates that the error has occurred; and

receive the first data that is re-sent by the network device using a second beam,

wherein the second beam is comprised in the at least one beam; and

wherein the processor is configured to:

combine the first data that is sent by the network device using the second beam and the first data that is re-sent by the network device using the first beam; and

decode the combined first data.

11. The terminal according to claim 7 , further comprising:

a processor;

wherein the transceiver is further configured to:

before sending or receiving, based on the first indication information, the signal at the at least one scheduling time indicated by the scheduling time information of the at least one beam, receive third indication information sent by the network device, wherein the third indication information indicates that a beam currently accessed by the terminal needs to be switched from the first beam to a third beam;

wherein the processor is configured to:

obtain random access time information of the third beam; and

determine scheduling time information of the third beam based on the random access time information of the third beam; and

wherein the transceiver is configured to:

receive or send, based on the first indication information and the scheduling time information of the third beam, a signal at a scheduling time indicated by the scheduling time information of the at least one beam and the scheduling time information of the third beam.

12. The terminal according to claim 7 , wherein the transceiver is further configured to:

before sending or receiving, based on the first indication information, the signal at the at least one scheduling time indicated by the scheduling time information of the at least one beam, receive third indication information sent by the network device, wherein the third indication information indicates that a beam currently accessed by the terminal needs to be switched from the first beam to a third beam; and

wherein the at least one beam comprises the third beam.

13. A terminal, comprising:

a non-transitory memory;

a processor;

a transceiver; and

a bus, wherein the memory, the processor, and the transceiver are connected using the bus;

wherein the transceiver is configured to perform communication between the terminal and an external device;

wherein the memory is configured to store a computer instruction; and

wherein the processor is configured to execute the computer instruction to:

control the transceiver to receive first indication information sent by a network device, wherein the first indication information indicates scheduling time information of at least one beam, the scheduling time information of the at least one beam comprises a mapping relationship between a respective scheduling time of each beam of the at least one beam and the respective beam, or a respective scheduling time of each beam of the at least one beam, the scheduling time information of the at least one beam instructs the terminal to receive or send a signal at at least one scheduling time indicated by the scheduling time information of the at least one beam, and the at least one beam comprises a first beam currently accessed by the terminal; and

control the transceiver to receive or send, based on the first indication information, a signal at the at least one scheduling time indicated by the scheduling time information of the at least one beam.

14. The terminal according to claim 13 , wherein the at least one beam further comprises a second beam corresponding to the network device, wherein the second beam is different than the first beam.

15. The terminal according to claim 13 , wherein the transceiver is further configured to:

before receiving the first indication information sent by the network device, send a request message to the network device, wherein the request message requests the network device to obtain the scheduling time information of the at least one beam.

16. The terminal according to claim 15 , wherein the transceiver is further configured to:

when it is determined an error has occurred in receiving first data that is sent by the network device using the first beam, and after sending or receiving, based on the first indication information, the signal at the at least one scheduling time indicated by the scheduling time information of the at least one beam, send second indication information to the network device, wherein the second indication information indicates that an error has occurred in receiving the first data sent by the network device using the first beam; and

receive the first data that is re-sent by the network device using a second beam, wherein the second beam is comprised in the at least one beam; and

wherein the processor is further configured to:

combine the first data that is re-sent by the network device using the second beam and the first data that is sent by the network device using the first beam; and

decode combined first data.

17. The terminal according to claim 13 , wherein:

the transceiver is further configured to:

before sending or receiving, based on the first indication information, the signal at the at least one scheduling time indicated by the scheduling time information of the at least one beam, receive third indication information sent by the network device, wherein the third indication information indicates that a beam currently accessed by the terminal needs to be switched from the first beam to a third beam;

the processor is further configured to obtain random access time information of the third beam, and determine scheduling time information of the third beam based on the random access time information of the third beam; and

the transceiver is further configured to receive or send, based on the first indication information and the scheduling time information of the third beam, a signal at a scheduling time indicated by the scheduling time information of the at least one beam and the scheduling time information of the third beam.