name: SM
full_form: Session Management
context: work for the new session. 1-3. UE has an established PDU Session (PDU Session 1) protected by using key Ks1. Key Ks1 is shared by UE and Source UP-GW. During handover, new PDU Session establishment request is triggered. 4.1 According to the solution #1.5, the security requirement and key K-up for the user plane data were already obtained or negotiated by source SM function. Also, the Source SM decides whether to relocate from source SM to a target SM or relocate to another UP-GW. 4.2. If the SM does not relocate, source SM and target SM are the same, and step4.2 is not executed. If SM relocation is needed, the source SM sends the security requirement (refers to solution#1.5) and K-up to the target SM via SM relocation message. 4.3. Target SM sends the update security policy request to Security Policy Function in order to achieve the final new security policy based on the security capabilities of target UP-GW. 4.4. Target SM generated Ks2 for the new session based on the final security
description: The Session Management (SM) function is responsible for managing and controlling PDU sessions, including establishment, modification, and release of sessions. It also handles security aspects such as key management and security policy updates.
explanation: SM is classified as a Network Function based on its role in managing PDU sessions and handling security requirements, as highlighted by the context from 3GPP TS 33.899.
section_title: 5.1.4.10.2 	Solution details
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biotag_Description: O,B-Service,I-Service,O,O,O,O,O,O,O,O,B-Connection,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O