Section: 7.3.9 Identification Response
Content: The old SGSN/MME/AMF shall send an Identification Response message to the new MME/SGSN/AMF as a response to a previous Identification Request message over S3/S10/S16/N26 interface. Table 7.3.9-1 specifies the presence requirements and conditions of the IEs in the message. For Intra Domain Connection of RAN Nodes to Multiple CN Nodes, if an old SGSN within an SGSN pool receives an Identification Request message that contains the optional parameter Address for Control Plane, the old SGSN shall use this address as destination IP address of the Identification Response message. Possible Cause values are specified in Table 8.4-1. Message specific cause values are: "P-TMSI Signature mismatch" "User authentication failed" Only the Cause information element shall be included in the response if the Cause contains another value than "Request accepted". Table 7.3.9-1: Information Elements in an Identification Response