Section: 8.9.7 Trace activation/deactivation over F1 and E1
Content: Figure 8.9.6-1 shows the procedure used for the activation and the deactivation of UE traces in the gNB-DU, the gNB-CU-UP or both. Figure 8.9.6-1: Trace activation/deactivation over F1 and E1 1. The gNB-CU-CP receives a TRACE START message from the AMF or the MeNB (in case of EN-DC). 2. The gNB-CU-CP initiates the Trace Start procedure by sending a TRACE START message to the gNB-DU, the gNB-CU-UP or both. 3. Upon reception of the TRACE START message, the gNB-DU, the gNB-CU-UP or both initiate the requested trace session and report it as described in TS 32.422[ Telecommunication management; Subscriber and equipment trace; Trace control and configuration management ]  [20]. 4. The gNB-CU-CP receives a DEACTIVATE TRACE message from the AMF or the MeNB (in case of EN-DC). 5. The gNB-CU-CP initiates the Deactivate Trace procedure by sending a DEACTIVATE TRACE message to the gNB-DU, the gNB-CU-UP or both. 6. Upon reception of the DEACTIVATE TRACE message, the gNB-DU, the gNB-CU-UP or both stop the trace session for the indicated trace reference.