Section: 5.5.3.2 Layer 3 filtering
Content: The UE shall: 1> for each cell measurement quantity, each beam measurement quantity, each sidelink measurement quantity as needed in clause 5.8.10, for each CLI measurement quantity that the UE performs measurements according to 5.5.3.1, for each candidate L2 U2N Relay UE measurement quantity according to 5.5.3.4, for evaluating the detected NR sidelink U2N Relay UEs according to 5.8.15.3, for evaluating the SyncRef UE according to 5.8.5 and 5.8.6, and for evaluating the detected NR sidelink U2U Relay UEs according to 5.8.17.4: 2> filter the measured result, before using for evaluation of reporting criteria, for measurement reporting, for U2N/U2U Relay (re)selection evaluation or for evaluating the SyncRef UE, by the following formula: Fn = (1 – a)*Fn-1 + a*Mn where Mn is the latest received measurement result from the physical layer; Fn is the updated filtered measurement result, that is used for evaluation of reporting criteria, for measurement reporting, for U2N/U2U Relay (re)selection evaluation or for evaluating the SyncRef UE; Fn-1 is the old filtered measurement result, where F0 is set to M1 when the first measurement result from the physical layer is received; and for MeasObjectNR, a = 1/2(ki/4), where ki is the filterCoefficient for the corresponding measurement quantity of the i:th QuantityConfigNR in quantityConfigNR-List, and i is indicated by quantityConfigIndex in MeasObjectNR; for other measurements, a = 1/2(k/4), where k is the filterCoefficient for the corresponding measurement quantity received by the quantityConfig; for UTRA-FDD, a = 1/2(k/4), where k is the filterCoefficient for the corresponding measurement quantity received by quantityConfigUTRA-FDD in the QuantityConfig; 2> adapt the filter such that the time characteristics of the filter are preserved at different input rates, observing that the filterCoefficient k assumes a sample rate equal to X ms; The value of X is equivalent to one intra-frequency L1 measurement period as defined in TS 38.133[ NR; Requirements for support of radio resource management ]  [14] assuming non-DRX operation, and depends on frequency range. NOTE 1: If k is set to 0, no layer 3 filtering is applicable. NOTE 2: The filtering is performed in the same domain as used for evaluation of reporting criteria, for measurement reporting, for U2N Relay (re)selection evaluation or for evaluating the SyncRef UE, i.e., logarithmic filtering for logarithmic measurements. NOTE 3: The filter input rate is implementation dependent, to fulfil the performance requirements set in TS 38.133[ NR; Requirements for support of radio resource management ]  [14]. For further details about the physical layer measurements, see TS 38.133[ NR; Requirements for support of radio resource management ]  [14]. NOTE 4: For CLI-RSSI measurement, it is up to UE implementation whether to reset filtering upon BWP switch. NOTE 5: For SSB measurements when multiple altitude range-based ssb-ToMeasure are configured, it is up to UE implementation whether to reset filtering upon entering a different altitude range.