4.8 RCEF reporting

32.4223GPPRelease 17Subscriber and equipment traceTelecommunication managementTrace control and configuration managementTS

4.8.1 Trace session activation for RCEF reporting in E-UTRAN

RCEF reporting is activated to the eNB as a special Trace Session where the Job Type indicates RCEF reporting only. The detailed procedure is shown in figure 4.8.1.1 where a UE experiences an RCEF event and the RRC establishment is successful to the same eNB.

Figure 4.8.1.1 Example scenario for RCEF reporting when UE RRC establishment is successful to the same eNB.

When the eNB receives the Trace Session activation indicating RCEF reporting only, the eNB shall start a Trace Session. This Trace Session shall collect only RCEF reports received from the UE. The Trace Session activation message received from the EMS shall contain the following information:

– Trace Reference

– Job Type = RCEF reporting only

– TCE IP Address

Figure 4.8.1.2 shows another example where the UE RRC Establishment is failed to one eNB, but successful to another eNB.

Figure 4.8.1.2 Example scenario for RCEF reporting when the UE RRC establishment is successful to a different eNB

If the UE establishes the RRC connection successfully the RCEF reports are fetched by the eNB. The procedures to be used at eNB to forward the RCEF reports towards the management system are the same regardless of whether RCEF occurred at this eNB or a different eNB.

If a UE detects a RRC Connection Establishment Failure event, it collects certain information as described in TS 37.320[30]. Once the eNB retrieved the RCEF report from the UE, as defined in TS 37.320[30], it shall save it to the Trace Record. The Trace Record containing the RCEF reports can be transferred to the TCE in the same mechanism as for normal subscriber and equipment trace or for MDT.

4.8.2 Trace session deactivation for RCEF reporting in E-UTRAN

When the eNB receives the indication from the EM for trace session deactivation with the Job Type "RCEF reporting only", it shall deactivate the trace session for the indicated Trace Reference of RCEF reporting and stop RCEF reporting to the TCE.

4.8.3 Trace session activation for RCEF reporting in NG-RAN

RCEF reporting is activated to the gNB as a special Trace Session where the Job Type indicates RCEF reporting only. The detailed procedure is shown in figure 4.8.3.1 where a UE experiences an RCEF event and the RRC establishment is successful to the same gNB.

Figure 4.8.3.1 Example scenario for RCEF reporting when UE RRC establishment is successful to the same gNB.

Upon Trace Session activation indicating RCEF reporting only, the gNB shall start a Trace Session. This Trace Session shall collect only RCEF reports received from the UE. The Trace Session activation information shall contain the following information:

– Trace Reference

– Job Type = RCEF reporting only

– TCE IP Address for file based reporting or Trace Reporting Consumer URI for streaming reporting

Figure 4.8.3.2 shows another example where the UE RRC Establishment is failed to one gNB, but successful to another gNB.

Figure 4.8.3.2 Example scenario for RCEF reporting when the UE RRC establishment is successful to a different gNB

If the UE establishes the RRC connection successfully the RCEF reports are fetched by the gNB. The procedures to be used at gNB to forward the RCEF reports towards the management system are the same regardless of whether RCEF occurred at this gNB or a different gNB.

If a UE detects a RRC Connection Establishment Failure event, it collects certain information as described in 3GPP TS 37.320 clause 5.1.6 [30]. Once the gNB retrieved the RCEF report from the UE, as defined in 3GPP TS 37.320 [30], it shall save it to the Trace Record. The Trace Record containing the RCEF reports can be transferred to the TCE for file-based trace reporting or to the Streaming data reporting MnS consumer for streaming reporting in the same mechanism as for normal subscriber and equipment trace or for MDT.

4.8.4 Trace session deactivation for RCEF reporting in NG-RAN

Upon trace session deactivation with the Job Type "RCEF reporting only", gNB shall deactivate the trace session for the indicated Trace Reference of RCEF reporting and stop RCEF reporting to the TCE for the file-based reporting or to the Streaming data reporting MnS consumer for the streaming reporting.