5.5 UE SS-RSRPB per receiver branch reporting

38.5093GPP5GSRelease 17Special conformance testing functions for User Equipment (UE)TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

5.5.1 General

In 38.215 [22], section 5.1.18 defines SS-RSRPB as below, with its applicability only to FR2 and in RRC_CONNECTED Mode.

Definition

SS reference signal received power per branch (SS-RSRPB) is defined as the linear average over the power contributions (in [W]) of the resource elements that carry secondary synchronization signals (SS). The measurement time resource(s) for SS-RSRPB are confined within SS/PBCH Block Measurement Time Configuration (SMTC) window duration.

For SS-RSRPB determination demodulation reference signals for physical broadcast channel (PBCH) and, if indicated by higher layers, CSI reference signals in addition to secondary synchronization signals may be used. SS-RSRPB using demodulation reference signal for PBCH or CSI reference signal shall be measured by linear averaging over the power contributions of the resource elements that carry corresponding reference signals taking into account power scaling for the reference signals as defined in 3GPP TS 38.213 [5].

SS-RSRPB shall be measured only among the reference signals corresponding to SS/PBCH blocks with the same SS/PBCH block index and the same physical-layer cell identity.

If higher-layers indicate certain SS/PBCH blocks for performing SS-RSRPB measurements, then SS-RSRPB is measured only from the indicated set of SS/PBCH block(s).

For frequency range 1, SS-RSRPB is not defined. For frequency range 2, SS-RSRPB shall be measured for each receiver branch based on the combined signal from antenna elements corresponding to the receiver branch.

Applicable for

RRC_CONNECTED intra-frequency

The SS uses the SS-RSRPB reporting procedure to command the UE to report SS-RSRP per UE receiver branch. The report from the UE shall be a vector of values, where the number of the reported values equals the number of receiver branches on the UE.

Figure 5.5.1-1: UE SS-RSRPB reporting procedure

5.5.2 Initiation

The SS requests the UE to start reporting SS-RSRP per receiver branch by transmitting a SS-RSRPB REPORT REQUEST message. And the UE responds back reporting SS-RSRP per receiver branch via SS-RSRPB REPORT RESPONSE.

5.5.3 Reception of SS-RSRPB REPORT REQUEST message by UE

When the UE receives SS-RSRPB REPORT REQUEST message then the UE shall:

1> if the UE is operating in FR2 AND in RRC_CONNECTED state:

2> if quantityConfigRS-Index is configured to UE by RRC Signalling

3> use the L3 filter coefficient given by quantityConfigRS-Index.

2> else

3> use default L3 filter coefficient of fc4.

2> if the MeasObjectId signalled by the IE SS-RSRPB Measurement Config and ReportConfigNR with reportType set to periodical which is asscociated to this MeasObjectNR are configured to the UE by RRC Signalling

3> Reply with the SS-RSRPB REPORT RESPONSE using the Measurement configuration as in the Measurement Object identified in the SS-RSRPB Measurement Config and reportInterval, reportAmount as in the associated ReportConfigNR

3> Report the SS-RSRPB measurement for the best SSB-ID of the serving PCI configured in the MeasObject

3> FFS to have multiple cells and/or SSB-ID

2> else if the MeasObjectId signalled by the IE SS-RSRPB Measurement Config is configured to the UE by RRC signalling but no ReportConfigNR with reportType set to periodical is asscociated to this MeasObjectNR:

3> Reply with the SS-RSRPB REPORT RESPONSE using the Measurement configuration as in the Measurement Object identified in the SS-RSRPB Measurement Config and default reportInterval of 640ms, and default reportAmount of r16

3> Report the SS-RSRPB measurement for the serving PCI and best SSB-ID configured in the MeasObject

3> FFS to have multiple cells and/or SSB-ID

2> else the UE behaviour is unspecified.

1> else:

2> the UE behaviour is unspecified.

The SS-RSRPB Report Request & SS-RSRPB Report Response Message Octets are defined below in Section 6.5.