Patent ID: 11863373
Assignee: FG INNOVATION COMPANY LIMITED
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method performed by a User Equipment (UE) for a Beam Failure Recovery (BFR) procedure, the method comprising:
receiving, from a Base Station (BS), a BFR configuration for a serving cell of the BS, wherein the serving cell is a secondary cell (SCell), the BFR configuration includes a threshold for a Beam Failure Instance (BFI) counter associated with the serving cell, and the threshold is associated with a beamFailureInstanceMaxCount information element (IE);
incrementing a value of the BFI counter based on a Beam Failure Detection (BFD);
triggering the BFR procedure for the serving cell when the value of the BFI counter is equal to or higher than the threshold;
performing a Band Width Part (BWP) switching for the serving cell in response to receiving a reconfiguration indication from the BS during the BFR procedure, wherein the reconfiguration indication includes a BWP index; and
setting the value of the BFI counter to zero and reconfiguring at least one parameter for the serving cell when performing the BWP switching during the BFR procedure,
wherein the at least one parameter includes at least one of a parameter associated with the BFI counter, a parameter associated with a BFD timer, or a Reference Signal (RS) associated with the BFD, wherein setting the value of the BFI counter to zero comprises:
setting the value of the BFI counter to zero when the serving cell is deactivated, wherein the serving cell is deactivated when the UE receives an SCell Activation/Deactivation Medium Access Control (MAC) Control Element (CE) for deactivating the serving cell or when an SCell deactivation timer for the serving cell is expired, or
setting the value of the BFI counter to zero when receiving, from the BS, a BFR response (BFRR) for the serving cell during the BFR procedure, and, wherein:
the BFRR is received from a Physical Downlink Control Channel (PDCCH) of the serving cell, and is addressed by a Cell-Radio Network Temporary Identifier (C-RNTI) to indicate an uplink grant for a new transmission,
the uplink grant is scheduled for a Hybrid Automatic Repeat Request (HARQ) process used for a transmission of a BFR MAC CE, and
the BFR MAC CE includes at least one of a cell identity of the serving cell, a beam-presence indicator of the serving cell, or a candidate beam indicator of the serving cell.