US 12,015,999 B2 · Default beam identification and beam failure detection in cross carrier scheduling

Abstract

Methods, systems, and devices for wireless communications are described. A base station may transmit a first downlink grant (e.g., a PDCCH transmission) for a first data transmission (e.g., a PDSCH transmission) over a first component carrier; the first data transmission over a second component carrier; and a second downlink grant (e.g., another PDCCH transmission) for a second data transmission (e.g., another PDSCH transmission) over the second component carrier. A user equipment (UE) receives the first data transmission over a first beam and may use the first beam for receiving the second data transmission. Additionally or alternatively, the UE may receive a configuration message indicating a set of TCI states for downlink data transmissions to the UE; identify one or more reference signals monitor for beam failure detection (BFD), identify one or more BFD beams, monitor the identified one or more reference signals; and selectively trigger a beam failure reporting procedure.

Claims30

Dependent claims

An apparatus for wireless communication at a user equipment (UE), comprising:

a processor,
memory coupled to the processor;
and
instructions stored in the memory and executable by the processor to cause the apparatus to:
receive a configuration message indicating a set of transmission configuration indicator (TCI) states for downlink data transmissions to the UE;
identify one or more reference signals to monitor for beam failure detection based at least in part on the indicated set of TCI states;
determine a reference signal type associated with each TCI state in the set of TCI states;
select, from the set of TCI states, a subset of TCI states for beam failure detection based at least in part on the reference signal type associated with each TCI state in the set of TCI states;
identify one or more beam failure detection beams based at least in part on the subset of TCI states and the identified one or more reference signals;
monitor the identified one or more reference signals using the identified one or more beam failure detection beams;
and
selectively trigger a beam failure reporting procedure based at least in part on the monitoring.

9 more elements

An apparatus for wireless communication at a user equipment (UE), comprising:

means for receiving a configuration message indicating a set of transmission configuration indicator (TCI) states for downlink data transmissions to the UE;
means for identifying one or more reference signals to monitor for beam failure detection based at least in part on the indicated set of TCI states;
means for determining a reference signal type associated with each TCI state in the set of TCI states;
means for selecting, from the set of TCI states, a subset of TCI states for beam failure detection based at least in part on the reference signal type associated with each TCI state in the set of TCI states;
means for identifying one or more beam failure detection beams based at least in part on the indicated set of TCI states and the identified one or more reference signals;
means for monitoring the identified one or more reference signals using the identified one or more beam failure detection beams;
and
means for selectively triggering a beam failure reporting procedure based at least in part on the monitoring.

5 more elements

A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by a processor to:

receive a configuration message indicating a set of transmission configuration indicator (TCI) states for downlink data transmissions to the UE;
identify one or more reference signals to monitor for beam failure detection based at least in part on the indicated set of TCI states;
determine a reference signal type associated with each TCI state in the set of TCI states;
select, from the set of TCI states, a subset of TCI states for beam failure detection based at least in part on the reference signal type associated with each TCI state in the set of TCI states;
identify one or more beam failure detection beams based at least in part on the subset of TCI states and the identified one or more reference signals;
monitor the identified one or more reference signals using the identified one or more beam failure detection beams;
and
selectively trigger a beam failure reporting procedure based at least in part on the monitoring.

5 more elements

Dependencies are inferred from the claim text.

Default beam identification and beam failure detection in cross carrier scheduling

Life of this patent

Default beam identification and beam failure detection in cross carrier scheduling

Life of this patent

Abstract

Claims30