Beam failure detection and recovery
A user equipment (UE) is configured with at least one bandwidth part (BWP) specific configuration information. The UE receives a configuration information specific to the bandwidth part (BWP). The configuration information configures an initial value of a beam failure detection (BFD) timer and a beam failure indication (BFI) count threshold. The UE starts or re-starts the BFD timer from the initial value when receiving a beam failure indication (BFI) from a lower sublayer, and counts a number of the received BFIs using a BFI counter. The UE resets the BFI counter to zero when receiving a reconfiguration information. The reconfiguration information, that is specific to the BWP, re-configures at least one of the initial value of the BFD timer and the BFI count threshold.
1. A user equipment (UE) for wireless communication, comprising:
one or more non-transitory computer-readable media having executable instructions embodied thereon; and
at least one processor coupled to the one or more non-transitory computer-readable media and configured to execute the executable instructions to:
receive a first radio resource control (RRC) configuration specific to a bandwidth part (BWP), the first RRC configuration configuring an initial value of a beam failure detection (BFD) timer and a beam failure indication (BFI) count threshold;
start or re-start the BFD timer from the initial value when receiving a beam failure indication (BFI) from a lower sublayer;
count a number of the received BFIs using a BFI counter; and
set the BFI counter to zero when receiving a second RRC configuration specific to the BWP, the second RRC configuration re-configuring the BFI count threshold.
2. The UE of claim 1 , wherein the second RRC configuration is received via a downlink RRC message.
3. The UE of claim 1 , wherein the second RRC configuration is a radio link monitoring configuration information element.
4. The UE of claim 1 , wherein the second RRC configuration further re-configures the initial value of the BFD timer.
5. A method for wireless communication, comprising:
receiving a first radio resource control (RRC) configuration specific to a bandwidth part (BWP), the first RRC configuration configuring an initial value of a beam failure detection (BFD) timer and a beam failure indication (BFI) count threshold;
starting or re-starting the BFD timer when receiving a beam failure indication (BFI) from a lower sublayer;
counting a number of the received BFIs using a BFI counter; and
setting the BFI counter to zero when receiving a second RRC configuration specific to the BWP, the second RRC configuration re-configuring the BFI count threshold.
6. The method of claim 5 , wherein the second RRC configuration is received via a downlink RRC message.
7. The method of claim 5 , wherein the second configuration is a radio link monitoring configuration information element.
8. The method of claim 5 , wherein the second configuration further re-configures the initial value of the BFD timer.
9. A use equipment (UE) for wireless communication, comprising:
means for receiving a first radio resource control (RRC) configuration specific to a bandwidth part (BWP), wherein the first RRC configuration configures an initial value of a beam failure detection (BFD) timer and a beam failure indication (BFI) count threshold;
means for starting or re-starting the BFD timer from the initial value when receiving a beam failure indication (BFI) from a physical (PHY) sublayer;
means for counting a number of the received BFIs using a BFI counter; and
means for setting the BFI counter to zero when receiving a second RRC configuration specific to the BWP, wherein the second RRC configuration re-configures the BFI count threshold.
10. The UE of claim 9 , wherein the second RRC configuration is received via a downlink RRC message.
11. The UE of claim 9 , wherein the second RRC configuration is a radio link monitoring configuration information element.
12. The UE of claim 9 , wherein the second configuration further re-configures the initial value of the BFD timer.