Beam failure recovery in secondary cells
AssigneeIntel Corporation
InventorsAvik Sengupta, Alexei Davydov, Bishwarup Mondal
Life of this patent
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Abstract
Systems, apparatuses, methods, and computer-readable media, are provided for indicating beam failure detection (BFD) and/or beam failure recovery (BFR) information for secondary cells (SCells). Disclosed embodiments enable BFD/BFR reporting for SCells with only downlink or with both downlink and uplink to recover from link failure and/or beam failure. Other embodiments may be described and/or claimed.
Claims15
One or more non-transitory computer-readable media (NTCRM) comprising instructions for beam failure recovery (BFR), wherein execution of the instructions by one or more processors is to cause a user equipment (UE) to:
- in response to detection of a beam failure event in a secondary cell (SCell),
- determine one or more beams of the SCell on which to camp, wherein the determination of the one or more beams includes:
- determine a set of beam failure detection (BFD)-reference signals (RSs) to measure based on a received BFD configuration,
- perform measurement of the set of BFD-RSs, and
- determine the one or more beams to be beams associated with the measured BFD-RSs having a signal strength above a configured threshold;
- and
- generate a Medium Access Control (MAC) Control Element (CE) to include an index of the SCell, indications of the determined beams, and indexes of each measured BFD-RS having a signal strength above a configured threshold, and
- send the MAC CE to a Radio Access Network (RAN) node over an uplink (UL) channel in the SCell or a UL channel in a primary cell (PCell) associated with the SCell.
A modem platform to be employed by a user equipment (UE), the modem platform comprising:
- baseband circuitry to:
- detect a beam failure in a secondary cell (SCell),
- determine candidate beams of the SCell on which to camp based on measurement of corresponding Beam Failure Detection (BFD) reference signals (RSs), wherein the determination of the candidate beams includes:
- determine the corresponding of BFD-RSs to measure based on a received BFD configuration,
- perform measurement of the corresponding of BFD-RSs, and
- determine the candidate beams to be beams associated with the measured BFD-RSs having a signal strength above a configured threshold, and
- generate a Beam Failure Recovery (BFR) Medium Access Control (MAC) Control Element (CE) to include reference signal identifiers (IDs) of respective candidate beams whose corresponding BFD-RSs have a signal strength above a configured threshold;
- and
- radiofrequency (RF) circuitry coupled with the baseband circuitry, the RF circuitry to:
- transmit the BFR MAC CE to a Radio Access Network (RAN) node over the SCell or a primary cell (PCell) associated with the SCell, and
- receive a BFR configuration in a BFR Control Resource Set (CORESET) of a Physical Downlink Control Channel (PDCCH) on the SCell that is quasi co-located (QCL′d) with a candidate beam indicated by the BFR MAC CE, the BFR configuration to include parameters for use of the candidate beam.
Dependencies are inferred from the claim text.