Section: 7.3.2 Forward Relocation Response
Content: A Forward Relocation Response message shall be sent as a response to Forward Relocation Request during S1-based handover procedure, Inter RAT handover procedures, SRNS Relocation procedure and PS handover procedures, EPS to 5GS handover and 5GS to EPS handover procedures, 5G-SRVCC from NG-RAN to UTRAN procedure. Based on the List of Set-up Bearers IE in the Forward Relocation Response, the source MME/AMF shall determine whether the bearer contexts for SGi (IP, Non-IP or Ethernet) PDN connections were successfully transferred to the target MME/AMF. Based on the List of Set-up Bearers for SCEF PDN Connections IE in the Forward Relocation Response, the source MME shall determine whether the bearer contexts for SCEF PDN connections were successfully transferred to the target MME, and initiate procedures to release the SCEF PDN connections which were not successfully handed over. Table -1 specifies the presence requirements and conditions of the IEs in the message. Cause IE indicates if the relocation has been accepted, or not. The relocation has not been accepted by the target MME/SGSN/AMF if the Cause IE value differs from "Request accepted". Possible Cause values are specified in Table 8.4-1. Message specific cause values are: - "Relocation failure". Table -1: Information Elements in a Forward Relocation Response Bearer Context IE in this message is specified in Table -2, the source system shall use this IE for data forwarding in handover. Table -2: Bearer Context