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5G PDU Session Management

This 5G pdu session management page groups the main procedures used in this part of the 5G signaling library so you can jump quickly into the right flow for learning, trace reading, or troubleshooting.

What This Covers

Includes PDU session establishment, modification, release, SSC handling, and user-plane tunnel setup between the UE, AMF, SMF, and UPF.

Common network functions in this category include AMF, SMF, UPF.

Use this category page to jump into the main pdu session management procedures without scanning the broader 5G call flow library.

Core Session Setup

Procedures that create new PDU sessions and activate the first session-level user-plane path.

Specialized Session Variants

Session-establishment branches used for IMS, emergency handling, and slice-aware service needs.

Session Update and Continuity

Procedures that modify or preserve existing sessions after mobility, policy change, or service return.

Related 5G Paths

  • 5G Access & Registration Covers initial access, registration, authentication entry points, service request triggers, and the end-to-end UE to AMF registration sequence in 5G networks.
  • 5G Mobility Procedures Focuses on handover, tracking area updates, inter-gNB mobility, path switch, and session continuity during movement across the network.
  • 5G RRC Procedures Includes RRC setup, resume, reconfiguration, release, paging response, and other radio control exchanges between the UE and gNB.
  • 5G Security Procedures Describes authentication, NAS security activation, AS security setup, key derivation, and security mode related call flows in 5G.
  • PDU Session Establishment UE creates data session
  • PDU Session Modification Change QoS or resources