Communication method and apparatus

1. A communication method, comprising:

sending, by a network device, temporary synchronization signal block burst (SSB) burst configuration information to a terminal device served by a secondary serving cell, wherein the temporary SSB burst configuration information comprises a periodicity or an offset for sending a temporary SSB burst by the network device in the secondary serving cell configured for the terminal device; and

sending, by the network device, the temporary SSB burst in the secondary serving cell based on the temporary SSB burst configuration information, wherein a temporary SSB comprised in the temporary SSB burst does not comprise a physical broadcast channel (PBCH).

2. The method according to claim 1 , wherein the temporary SSB carries index information of the temporary SSB; wherein the temporary SSB carries index information of the temporary SSB comprises:

the temporary SSB carries 1 bit of information, indicating a remainder of an index mod 2, wherein the index is carried in the temporary SSB; or

the temporary SSB carries 2 bits of information, indicating a remainder of an index mod 4, wherein the index is carried in the temporary SSB.

3. The method according to claim 2 , wherein the index information is carried in the temporary SSB through scrambling by using a sequence of an orthogonal cover code (OCC) or a sequence of a demodulation reference signal (DMRS).

4. The method according to claim 1 , wherein the temporary SSB burst and a regular SSB burst that is sent by the network device in the secondary serving cell are sent in different half-frames.

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

stopping, by the network device, sending a temporary SSB burst in the secondary serving cell after receiving a message that is sent by the terminal device and that indicates that a secondary serving cell detection is completed; or

stopping, by the network device, sending a temporary SSB burst in the secondary serving cell when duration of sending temporary SSB bursts in the secondary serving cell exceeds a duration threshold.

6. A communication method, comprising:

receiving, by a terminal device, temporary synchronization signal block burst (SSB) burst configuration information sent by a network device, wherein the temporary SSB burst configuration information comprises a periodicity or an offset for sending a temporary SSB burst by the network device in a secondary serving cell configured for the terminal device; and

activating, by the terminal device, the secondary serving cell based on the temporary SSB burst configuration information and based on a regular SSB burst and the temporary SSB burst sent by the network device in the secondary serving cell, wherein a temporary SSB comprised in the temporary SSB burst does not comprise a physical broadcast channel (PBCH).

7. The method according to claim 6 , wherein the temporary SSB carries index information of the temporary SSB; wherein the temporary SSB carries index information of the temporary SSB comprises:

the temporary SSB carries 1 bit of information, indicating a remainder of an index mod 2, wherein the index is carried in the temporary SSB; or

the temporary SSB carries 2 bits of information, indicating a remainder of an index mod 4, wherein the index is carried in the temporary SSB.

8. The method according to claim 7 , wherein the index information is carried in the temporary SSB through scrambling by using a sequence of an orthogonal cover code (OCC) or a sequence of a demodulation reference signal (DMRS).

9. The method according to claim 6 , wherein the temporary SSB burst and the regular SSB burst that is sent by the network device in the secondary serving cell are sent in different half-frames.

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

sending, by the terminal device to the network device after completing a secondary serving cell detection, a message indicating that the secondary serving cell detection is completed.

11. A communication apparatus, comprising:

at least one processor; and

a memory storing programming instructions for execution by the at least one processor, the programming instructions instructing the communication apparatus to perform operations comprising:

generating temporary synchronization signal block burst (SSB) burst configuration information, wherein the temporary SSB burst configuration information comprises a periodicity or an offset for sending a temporary SSB burst in a secondary serving cell configured for a terminal device; and

sending the temporary SSB burst configuration information to the terminal device served by the secondary serving cell, and sending the temporary SSB burst in the secondary serving cell based on the temporary SSB burst configuration information, wherein a temporary SSB comprised in the temporary SSB burst does not comprise a physical broadcast channel (PBCH).

12. The communication apparatus according to claim 11 , wherein the temporary SSB carries index information of the temporary SSB;

wherein the temporary SSB carries index information of the temporary SSB comprises:

the temporary SSB carries 1 bit of information, indicating a remainder of an index mod 2, wherein the index is carried in the temporary SSB; or

the temporary SSB carries 2 bits of information, indicating a remainder of an index mod 4, wherein the index is carried in the temporary SSB.

13. The communication apparatus according to claim 12 , wherein the index information is carried in the temporary SSB through scrambling by using a sequence of an orthogonal cover code (OCC) or a sequence of a demodulation reference signal (DMRS).

14. The communication apparatus according to claim 13 , wherein the temporary SSB burst and a regular SSB burst that is sent by the communication apparatus in the secondary serving cell are sent in different half-frames.

15. The communication apparatus according to claim 11 , wherein the operations further comprises:

stopping sending a temporary SSB burst in the secondary serving cell after receiving a message that is sent by the terminal device and that indicates that a secondary serving cell detection is completed; or

stopping sending a temporary SSB burst in the secondary serving cell when duration of sending temporary SSB bursts in the secondary serving cell exceeds a duration threshold.

16. A communication apparatus, comprising:

at least one processor; and

a memory storing programming instructions for execution by the at least one processor, the programming instructions instructing the communication apparatus to perform operations comprising:

receiving temporary synchronization signal block burst (SSB) burst configuration information sent by a network device, wherein the temporary SSB burst configuration information comprises a periodicity or an offset for sending a temporary SSB burst by the network device in a secondary serving cell configured for the communication apparatus; and

activating the secondary serving cell based on the temporary SSB burst configuration information and based on a regular SSB burst and the temporary SSB burst sent by the network device in the secondary serving cell, wherein a temporary SSB comprised in the temporary SSB burst does not comprise a physical broadcast channel (PBCH).

17. The communication apparatus according to claim 16 , wherein the temporary SSB carries index information of the temporary SSB;

wherein the temporary SSB carries index information of the temporary SSB comprises:

the temporary SSB carries 1 bit of information, indicating a remainder of an index mod 2, wherein the index is carried in the temporary SSB; or

the temporary SSB carries 2 bits of information, indicating a remainder of an index mod 4, wherein the index is carried in the temporary SSB.

18. The communication apparatus according to claim 17 , wherein the index information is carried in the temporary SSB through scrambling by using a sequence of an orthogonal cover code (OCC) or a sequence of a demodulation reference signal (DMRS).

19. The communication apparatus according to claim 16 , wherein the temporary SSB burst and the regular SSB burst that is sent by the network device in the secondary serving cell are sent in different half-frames.

20. The communication apparatus according to claim 16 , wherein the operations further comprises:

sending to the network device after completing a secondary serving cell detection, a message indicating that the secondary serving cell detection is completed.