Carrier switching method, apparatus, and system for multi-carrier communication

A communications apparatus, comprising a receiver and a processor, wherein:

• the receiver is configured to receive configuration information, wherein the configuration information comprises first uplink carrier information and second uplink carrier information, and wherein the first uplink carrier information indicates a switching-from cell having a first uplink carrier that is a switching-from uplink carrier for a sounding reference signal (SRS) carrier switching and indicates whether the switching-from uplink carrier is a supplementary uplink (SUL) carrier, the second uplink carrier information indicates that a second uplink carrier is a switching-to uplink carrier for the SRS carrier switching;
• and
• the processor is configured to determine, based on the first uplink carrier information and the second uplink carrier information, the switching-from uplink carrier and the switching-to uplink carrier for the SRS carrier switching;
• and
• wherein the first uplink carrier and the second uplink carrier belong to different cells.

A non-transitory computer-readable storage medium comprising instructions which, when executed by a processor, cause the processor to:

• receive configuration information, wherein the configuration information comprises first uplink carrier information and second uplink carrier information, and wherein the first uplink carrier information indicates a switching-from cell having a first uplink carrier that is a switching-from uplink carrier for a sounding reference signal (SRS) carrier switching and indicates whether the switching-from uplink carrier is a supplementary uplink (SUL), the second uplink carrier information indicates that a second uplink carrier is a switching-to uplink carrier for the SRS carrier switching;
• and
• determine, based on the first uplink carrier information and the second uplink carrier information, the switching-from uplink carrier and the switching-to uplink carrier for the SRS carrier switching;
• and
• wherein the first uplink carrier and the second uplink carrier belong to different cells.