name: SCEF
full_form: Service Capability Exposure Function
context: AS_ID is the identity of the application server. 14) UE sends Application Request to the application server over the Ua interface. This message contains the GUTI received from MME in step 10, and msg. The content of msg depends on specific protocol. 15) Once receiving the Application Request, the application server sends Key Requset to SCEF with GUTI, AS_ID. 16) SCEF receives GUTI, SCEF uses the GUTI and other 3GPP operator services, e.g., network DNS, to identify the serving MME. 17) SCEF send a Mobile Data Request to the MME with the GUTI included. Note: In case SCEF is not equipped to derive KS-AS, SCEF include the AS_ID in the Mobile Data Request to allow the MME to derive the Ks_AS. 18) The MME search its database for the UE context of the received GUTI. MME responds to SCEF with Mobile Data Answer with the GUTI and the Ks included. Note: If the MME receives the GUTI and the AS_ID, MME derives the KS-AS key as KDF (Ks, AS-ID) and return to SCEF in the Mobile Data Answer. 19) The
description: The Service Capability Exposure Function (SCEF) is a network function that provides service capability information to application servers and other network functions, enabling them to make informed decisions about service provisioning and resource allocation.
explanation: Based on the context provided from 3GPP TS 33.863, SCEF is classified as a Network Function due to its role in interacting with the MME, using GUTI to identify serving MMEs, sending Mobile Data Requests, and receiving Mobile Data Answers containing Ks keys.
section_title: 6.11.2.2.2	Key agreement and boostrapping with HSS deriving master session key
biotag_Context: O,O,O,O,O,O,O,O,O,B-Device,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,B-Network Function,O,O,B-Network Function,O,O,B-Parameter,O,O,B-Organization,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,B-Network Function,O,O,B-Parameter,O,O,O,O,B-Network Function,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,B-Device,O,O,O,O,O,B-Network Function,O,O,B-Network Function,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,B-Network Function,O,O,B-Parameter,O,O,O,B-Network Function,O,O,O,O,O,B-Protocol,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O
biotag_Description: O,B-Network Function,I-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O