name: UDM
full_form: Unified Data Management Function
context: When a UDM receives a SUCI from the AUSF, the UDM de-conceals the SUCI to SUPI. The UDM stores the SUCI and the timestamp when the SUCI was received for the SUPI. The UDM initiates the authentication procedure. When the UDM receives the SUCI again, then it calculates the time period T between the first time the SUCI was received and the latest time the SUCI was received, if the T is less than or equal to T3519 then the UDM initiates authentication procedure otherwise the UDM determines either the UE is fake or there is man in the middle on receiving SUCI 1 and the UDM rejects the authentication procedure as SUCI retransmission is not expected after T3519. The UDM stores the time stamp of first time the SUCI was received for a SUPI for period of time (e.g. 24 hours or 48 hours or longer). Figure 6.2.10.2-1: Procedure to handle SUCI parameter in the UDM The detailed steps of the solution is as described below. 1. The UE is registered to the network for the first time by sending SUCI-1 in
description: The Unified Data Management Function (UDM) is a critical component within the 5G core network, responsible for managing and storing subscriber data. It plays a key role in authentication procedures by de-concealing SUCI to SUPI, storing timestamps, and initiating authentication processes based on received SUCIs.
explanation: The UDM is classified as a Network Function due to its central role in handling subscriber data, managing authentication procedures, and interacting with other network components like the AUSF. The provided context from 3GPP TS 33.846 highlights its specific responsibilities and behaviors within the network.
section_title: 6.2.10.2	Solution details
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biotag_Description: O,B-Network Function,I-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,O,B-Technology,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O