Fallback beam selection procedure during failure of receiving beam change command

摘要

In the process of beam change, the base station sends a beam change command to the user equipment (UE) to indicate that the base station is changed from the current beam to another beam, but the UE may not successfully receive the beam change command. The apparatus may be a base station configured to solve this problem. The base station determines to change from the first beam to the second beam. The base station sends a beam change command to the UE to indicate the decision to change to the second beam upon determining to change to the second beam. The base station determines whether the UE has successfully received a beam change command. When the base station determines that the UE has not received a beam change command, the base station selects a third beam to communicate with the UE, where the third beam is a predefined beam.