Step-1. LTERRCConnectionReconfiguration: UE will receive Measurement Object id | Report Config id | Meas ID| Measurement GAP for UE to measure NR SSB Frequency, SSB Measurement Time Configuration, B1NR measurements, Measurement Gaps.
Step-2. LTEMeasurementReport: UE decodes SSB measures SS-RSRP and based on fulfilling criteria B1-NR| TTT | Criteria sends measurement on Uplink.
Step-3. ENB-GNB Communication over X2AP: 2 Step process for X2AP:
SgNBAdditionRequest
SgNBAdditionRequestAcknowldgment
There are series of Communication created between F1AP.E1AP interfaces.
Step-4. LTERRCConnectionReconfiguration: UE receives the NR Cell based configuration in two critical Information Elements.
nr-SecondaryCellGroupConfig-r15
nr-RadioBearerConfig2-r15
Step-5. LTERRCConnectionReconfigurationComplete:
scg-ConfigResponseNR-r15
Step-6. NRRACHPROCEDURE: MSG1-MSG2-MSG3-MSG4
