Patent ID: 11870536
Assignee: NTT DOCOMO, INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A radio communication system comprising:
a first radio base station that forms a primary cell;
a second radio base station that forms a secondary cell; and
a terminal that simultaneously configures the primary cell and the secondary cell,
wherein the terminal receives from the second radio base station, a reference signal for use in a detection of a beam failure in the secondary cell,
the terminal performs a beam failure recovery procedure when the beam failure is detected based on a reception quality of the reference signal and the secondary cell is in an activated state,
the terminal performs a report of a candidate of a new beam in the beam failure recovery procedure, and
when beam failures are detected in a plurality of secondary cells, the terminal performs a report of candidates of new beams in the plurality of secondary cells using a same message.