eNB cannot Send B1 event Measurement Control to UE Because of Wrong Configuration

[live_energy]

eNB cannot send B1 event measurement control to UE via signaling trace. Because there is no B1 event measurement control UE cannot report B1 event measurement to eNB. Without B1 event measurement report from UE eNB cannot add the SgNB.

On eNB side we need to configure the parameters named DlArfcn and ScgDlArfcn in these four MOs they are NREXTERNALCELL, NRNFREQ, NRMFBIFREQ, NRSCGFREQCONFIG. The parameters should be configured as the SSB frequency position rather than the center frequency of the cell.

Change the configurations on eNB side from center frequency to SSB frequency position. Example, NR78 with 100M bandwidth is used, the center frequency is 636666 while the SSB frequency position is 636654 with NARFCN format.

So during the configuration the parameters mentioned above should be configured as 636654 rather than 636666



ADD NREXTERNALCELL:Mcc="xx", Mnc="xx", GnodebId=xx, CellId=xx, DlArfcn=636654,UlArfcnConfigInd=NOT_CFG, PhyCellId=xx, Tac=xx;

ADDNRNFREQ: LocalCellId=xx, DlArfcn=636654, UlArfcnConfigInd=NOT_CFG;
ADDNRMFBIFREQ: DlArfcn=636654, FrequencyBand=N78;
ADDNRSCGFREQCONFIG: PccDlEarfcn=xx, ScgDlArfcn=636654, ScgDlArfcnPriority=1;