name: SM
full_form: Session Management
context: Service operation name: Npcf_SMPolicyControl_Update. Description: The NF Service Consumer can request the update of the SM Policy Association to receive updated Policy information for the PDU Session. Inputs, Required: SM Policy Association ID. Inputs, Optional: Information on the Policy Control Request Trigger condition that has been met, as defined in clause 6.1.3.5 of TS 23.503[ Policy and charging control framework for the 5G System (5GS); Stage 2 ]  [20]. W-5GAN specific PDU Session information provided by the SMF is specified in TS 23.316[ Wireless and wireline convergence access support for the 5G System  (5GS) ]  [53]. Outputs, Required: Success or not. Outputs, Optional: Policy information for the PDU Session as defined in TS 23.503[ Policy and charging control framework for the 5G System (5GS); Stage 2 ]  [20] and Policy Control Request Trigger(s) of SM Policy Association as defined in clause 6.1.3.5 of TS 23.503[ Policy and charging control framework for the 5G System (5GS); Stage 2 ]  [20] and UE Policy Container. See clause 4.16.5.1 for the usage of this service operation. NOTE: When this service operation is invoked by SMF, race conditions apply, which are defined in TS 29.513[ 5G System; Policy and Charging Control signalling flows and QoS parameter mapping; Stage 3 ]  [47].
description: The Session Management (SM) procedure is a critical operation within the 5G core network, specifically related to the management of PDU Sessions. It involves the update of SM Policy Associations to ensure that user equipment receives the most current policy information. This process is initiated by the NF Service Consumer and may involve the provision of optional inputs such as policy control request trigger conditions. The outcome of this procedure includes success indicators and, optionally, updated policy information for the PDU Session, along with policy control request triggers and UE Policy Container details.
explanation: SM is categorized as a Procedure because it outlines a specific sequence of operations related to session management within the 5G network. This involves the interaction between different network functions, such as the SMF (Session Management Function), to update policy associations and ensure seamless communication. The detailed inputs, outputs, and references to specific clauses in 3GPP technical specifications further emphasize its procedural nature.
section_title: 5.2.5.4.5 Npcf_SMPolicyControl_Update service operation
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