ere the actual beam can be dynamically indicated to the UE by DCI signaling. To provide a sufficient time to switch the receive beam at the UE in accordance with the gNB indication, a time gap of several OFDM symbols between the last PDCCH symbol and the first PDSCH symbol is applied. NR also supports beam indication for uplink transmission. In particular, for the UE sup- porting beam correspondence, that is UE implementation allowing the reuse of the beam acquired by the UE in downlink for uplink transmission, beam indication for uplink trans- mission can be performed through the index of the downlink reference signal. The beam indication for uplink can be also performed independently from downlink by indicating the index of the SRS transmitted by the UE for beam acquisition purposes. In certain scenarios, the highly directional link between gNB and UE may fail, for example due to channel blockage. This event in NR is denoted as beam failure. To avoid time-consuming cell reselection procedures involving higher layers, NR specifies a beam failure recovery procedure at the physical layer, where a UE in the event of beam failure acquires an alternative beam pair without invoking RLF (3GPP TS 38.213). Beam failure recovery in NR includes the following steps: Beam failure detection New beam identification Beam failure recovery request Beam failure recovery response. The detection of beam failure in 5G NR is performed based on the measurements of the peri- odic reference signals, that is, SS/PBCH or CSI-RS, transmitted with the same beamforming as for the downlink control channel. Similar to RLF in LTE, beam failure detection in 5G NR is declared by the UE based on block error rate calculation (BLER) for the PDCCH. If the measured quality becomes low, the UE declares beam link failure and proceeds to the acquisition of an alternative candidate beam pair denoted as new beam identification. After finding a new beam pair based on L1-RSRP, the UE transmits a beam failure recovery request (BFRQ) message using a preconfigur