Beam failure recovery
Embodiments of the present disclosure provide method, device and computer readable medium for beam failure recovery. In example embodiments, a method implemented at a terminal device is provided. The method comprises determining a configuration for receiving Physical Downlink Control Channels (PDCCHs) from a network device, the network device communicating with the terminal device via first and second Transmission and Reception Points (TRPs), wherein the configuration indicates which one of the first and second TRPs are the PDCCHs to be received from. The method further comprises determining whether a beam failure occurs in at least one of the first and second TRPs. In addition, the method further comprises, in response to determining that a beam failure occurs in at least one of the first and second TRPs, performing beam failure recovery (BFR) for the first and second TRPs at least based on the configuration.
1. A method performed by the terminal device, the method comprising:
receiving, from a first transmission and reception point (TRP), a first Physical Downlink Control Channel (PDCCH), using a resource of a first Control Resource Set (CORESET);
receiving, from a second TRP, a second PDCCH, using a resource of a second CORESET,
wherein both of the first TRP and the second TRP correspond to a cell,
wherein a first set of reference signal (RS) resource configuration indexes corresponds to the first CORESET,
wherein a second set of RS resource configuration indexes corresponds to the second CORESET; and
providing, if a radio link quality for a RS resource configuration in the first set and the second set is below a predetermined threshold, at least one RS resource configuration index from a third set of RS resource configuration indexes for beam candidates, the third set being provided for a bandwidth part of the cell.
2. The method according to claim 1 , wherein a beam failure is detected if the radio link quality for all corresponding RS resource configurations in the first set and the second set is below the predetermined threshold.
3. A terminal device comprising:
a receiver configured to receive, from a first transmission and reception point (TRP), a first Physical Downlink Control Channel (PDCCH) using a resource of a first Control Resource Set (CORESET),
wherein the receiver is configured to receive, from a second TRIP, a second PDCCH using a resource of a second CORESET,
wherein both of the first TRP and the second TRP correspond to a cell,
wherein a first set of reference signal (RS) resource configuration indexes corresponds to the first CORESET,
wherein a second set of RS resource configuration indexes corresponds to the second CORESET, and
wherein the terminal device is configured to provide, if a radio link quality for a RS resource configuration in the first set and the second set is below a predetermined threshold, at least one RS resource configuration index from a third set of RS resource configuration indexes for beam candidates, the third set being provided for a bandwidth part of the cell.
4. The terminal according to claim 3 , wherein the terminal is configured to detect a beam failure if the radio link quality for all corresponding RS resource configurations in the first set and the second set is below the predetermined threshold.