Section: 10.18.5 RA Report retrieval
Content: In MR-DC, when a UE performs successful random access attempts which are only known by the SN (e.g., beam failure recovery, UL synchronization issue, scheduling request failure, no PUCCH resource available), the SN may inform the MN about the occurrences of successful random access procedures in the SN via a RACH indication. The MN may then retrieve the RA Report from the UE(s) based on the RACH indication received from the SN. A UE while being in EN-DC and NGEN-DC can collect E-UTRA RA Reports and NR RA Reports upon performing RACH in MN and SN respectively. When a E-UTRAN node retrieves the E-UTRA RA Report, it can also request UE to include the NR RA Report. If available, the UE then includes the NR RA Report in a container along with a list of PSCells associated to the NR RA Report within the E-UTRA RA Report. The retrieiving E-UTRAN node may then forward it to the corresponding SNs serving the PSCells indicated within the E-UTRA RA Report. In case of NGEN-DC, in case there is no Xn connectivity between the ng-eNB retrieving the NR RA Report from the UE and the gNB serving the PSCells indicated by UE in the NR RA Report, the ng-eNB may forward the NR RA Report via Xn to an ng-eNB connected to a gNB serving the PSCells indicated in the RA Report. In case of EN-DC, in case there is no X2 connectivity between the eNB retrieving the NR RA Report from the UE and the en-gNB serving the PSCells indicated by UE in the NR RA Report, the eNB may forward the NR RA Report via X2 to an eNB connected to an en-gNB serving the PSCells indicated in the RA Report.