LTE NR B1 Measurement Configurations

The details of LTE NR B1 configurations from LTE RRC Connection Reconfiguration mesage. UE can report NR measurements SS-RSRP/RSRQ/SINR [ReportQuantityNR-r15] on either cell or beam level [reportRS-IndexResultsNR].

3GPP SPEC 36.331

ReportConfigInterRAT information element

– ASN1START

  ReportConfigInterRAT ::= SEQUENCE {
      triggerType CHOICE {
          event SEQUENCE {
              eventId CHOICE {
                  eventB1 SEQUENCE {
                      b1-Threshold CHOICE {
                          b1-ThresholdUTRA ThresholdUTRA,
                          b1-ThresholdGERAN ThresholdGERAN,
                          b1-ThresholdCDMA2000 ThresholdCDMA2000
                      }
                  },
                  eventB2 SEQUENCE {
                      b2-Threshold1 ThresholdEUTRA,
                      b2-Threshold2 CHOICE {
                          b2-Threshold2UTRA ThresholdUTRA,
                          b2-Threshold2GERAN ThresholdGERAN,
                          b2-Threshold2CDMA2000 ThresholdCDMA2000
                      }
                  },
                  …,
                  eventW1-r13 SEQUENCE {
                      w1-Threshold-r13 WLAN-RSSI-Range-r13
                  },
                  eventW2-r13 SEQUENCE {
                      w2-Threshold1-r13 WLAN-RSSI-Range-r13,
                      w2-Threshold2-r13 WLAN-RSSI-Range-r13
                  },
                  eventW3-r13 SEQUENCE {
                      w3-Threshold-r13 WLAN-RSSI-Range-r13
                  },
                  eventB1-NR-r15 SEQUENCE {
                      b1-ThresholdNR-r15 ThresholdNR-r15,
                      reportOnLeave-r15 BOOLEAN
                  },
                  eventB2-NR-r15 SEQUENCE {
                      b2-Threshold1-r15 ThresholdEUTRA,
                      b2-Threshold2NR-r15 ThresholdNR-r15,
                      reportOnLeave-r15 BOOLEAN
                  }
              },
              hysteresis Hysteresis,
              timeToTrigger TimeToTrigger
          },
          periodical SEQUENCE {
              purpose ENUMERATED {
                                                          reportStrongestCells,
                                                          reportStrongestCellsForSON,
                                                          reportCGI}
          }
      },
      maxReportCells INTEGER (1..maxCellReport),
      reportInterval ReportInterval,
      reportAmount ENUMERATED {r1, r2, r4, r8, r16, r32, r64, infinity},
      …,
      [[ si-RequestForHO-r9 ENUMERATED {setup} OPTIONAL – Cond reportCGI
      ]],
      [[ reportQuantityUTRA-FDD-r10 ENUMERATED {both} OPTIONAL – Need OR
      ]],
      [[ includeLocationInfo-r11 BOOLEAN OPTIONAL – Need ON
      ]],
      [[ b2-Threshold1-v1250 CHOICE {
              release NULL,
              setup RSRQ-Range-v1250
          } OPTIONAL – Need ON
      ]],
      [[ reportQuantityWLAN-r13 ReportQuantityWLAN-r13 OPTIONAL – Need ON
      ]],
      [[ reportAnyWLAN-r14 BOOLEAN OPTIONAL – Need ON
      ]],
      [[ reportQuantityCellNR-r15 ReportQuantityNR-r15 OPTIONAL, – Need ON
          maxReportRS-Index-r15 INTEGER (0..maxRS-IndexReport-r15) OPTIONAL, – Need ON
          reportQuantityRS-IndexNR-r15 ReportQuantityNR-r15 OPTIONAL, – Need ON
          reportRS-IndexResultsNR BOOLEAN OPTIONAL, – Need ON
          reportSFTD-Meas-r15 ENUMERATED {pSCell, neighborCells } OPTIONAL – Need ON
      ]]
  }

  ThresholdUTRA ::= CHOICE{
      utra-RSCP INTEGER (-5..91),
      utra-EcN0 INTEGER (0..49)
  }

  ThresholdGERAN ::= INTEGER (0..63)

  ThresholdCDMA2000 ::= INTEGER (0..63)

  ReportQuantityNR-r15::= SEQUENCE {
      ss-rsrp BOOLEAN,
      ss-rsrq BOOLEAN,
      ss-sinr BOOLEAN
  }

  ReportQuantityWLAN-r13 ::= SEQUENCE {
      bandRequestWLAN-r13 ENUMERATED {true} OPTIONAL, – Need OR
      carrierInfoRequestWLAN-r13 ENUMERATED {true} OPTIONAL, – Need OR
      availableAdmissionCapacityRequestWLAN-r13 ENUMERATED {true} OPTIONAL, – Need OR
      backhaulDL-BandwidthRequestWLAN-r13 ENUMERATED {true} OPTIONAL, – Need OR
      backhaulUL-BandwidthRequestWLAN-r13 ENUMERATED {true} OPTIONAL, – Need OR
      channelUtilizationRequestWLAN-r13 ENUMERATED {true} OPTIONAL, – Need OR
      stationCountRequestWLAN-r13 ENUMERATED {true} OPTIONAL, – Need OR
      …
  }

– ASN1STOP

  reportRS-IndexResultsNR
     Indicates whether or not the UE shall report beam measurement result of NR in the measurement report.

  maxReportRS-Index
    Max number of RS indices to include in the measurement report. E-UTRAN configures value 0 only if it sets reportRS-IndexResultsNR to FALSE.

---

Examples

measObject

  {
            measObjectId 4,
            measObject measObjectNR-r15 : {
              carrierFreq-r15 ******,
              rs-ConfigSSB-r15 {
               measTimingConfig-r15 {
                periodicityAndOffset-r15 sf20-r15 : 8,
                ssb-Duration-r15 sf4
               },
               subcarrierSpacingSSB-r15 kHz30
              },
              offsetFreq-r15 0,
              quantityConfigSet-r15 1,
              bandNR-r15 setup : 78
             }
           }

reportConfig Example-1

This example shows UE only needs to report SS-RSRP on cell level as reportRS-IndexResultsNR is missing.

  {
            reportConfigId 6,
            reportConfig reportConfigInterRAT : {
              triggerType event : {
                eventId eventB1-NR-r15 : {
                  b1-ThresholdNR-r15 nr-RSRP-r15 : 40,
                  reportOnLeave-r15 FALSE
                 },
                hysteresis 4,
                timeToTrigger ms256
               },
              maxReportCells 8,
              reportInterval min60,
              reportAmount r1,
              reportQuantityCellNR-r15 {
               ss-rsrp TRUE,
               ss-rsrq FALSE,
               ss-sinr FALSE
              }
             }
           }

reportConfig Example-2

This example shows UE needs to report SS-RSRP and SS-RSRQ on cell level as reportRS-IndexResultsNR is missing as well.

  - . . . . . . . . . .reportConfigId: 4
  - . . . . . . . . . .reportConfig:- reportConfigInterRAT
  - . . . . . . . . . . . .triggerType:- event
  - . . . . . . . . . . . . . .eventId:- eventB1-NR-r15
  - . . . . . . . . . . . . . . . .b1-ThresholdNR-r15:- nr-RSRP-r15: 36 (-120.00 dBm)
  - . . . . . . . . . . . . . . . .reportOnLeave-r15: 0
  - . . . . . . . . . . . . . .hysteresis: 0 (0.0 dB)
  - . . . . . . . . . . . . . .timeToTrigger: 0 ( ms0)
  - . . . . . . . . . . . .maxReportCells: 4
  - . . . . . . . . . . . .reportInterval: 1 ( ms240)
  - . . . . . . . . . . . .reportAmount: 2 ( r4)
  - . . . . . . . . . . . .reportQuantityCellNR-r15
  - . . . . . . . . . . . . .ss-rsrp: 1
  - . . . . . . . . . . . . .ss-rsrq: 1
  - . . . . . . . . . . . . .ss-sinr: 0

Measurement Report

  LTE_Uu_RRC: UL_DCCH_Message
  - . .message:- c1:- measurementReport
  - . . . . .criticalExtensions:- c1:- measurementReport-r8
  - . . . . . . . .measResults
  - . . . . . . . . .measId: 4
  - . . . . . . . . .measResultPCell
  - . . . . . . . . . .rsrpResult: 97 (-43.00 dBm)
  - . . . . . . . . . .rsrqResult: 25 (-7.50 dB)
  - . . . . . . . . .measResultNeighCells:- measResultNeighCellListNR-r15
  - . . . . . . . . . .measResultNeighCellListNR-r15 [ 0 ]
  - . . . . . . . . . . .pci-r15: 6
  - . . . . . . . . . . .measResultCell-r15
  - . . . . . . . . . . . .rsrpResult-r15: 100 (-56.00 dBm)
  - . . . . . . . . . . . .rsrqResult-r15: 65 (-10.50 dB)