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5G5G FundamentalsDraft — coming soon

PDU Session Explained

What a PDU session is in 5G, how it's established, and how QoS flows map onto it end to end.

By Manas·5 min read·Updated 2026-07-18

This article is a placeholder. Full write-up coming soon.

What a PDU session is in 5G, how it's established, and how QoS flows map onto it end to end.

What this article will cover

  • Definition of a PDU (Protocol Data Unit) session
  • PDU session establishment procedure step by step
  • Session types: IPv4, IPv6, IPv4v6, Ethernet, Unstructured
  • Relationship between PDU sessions and QoS flows
  • Session modification and release procedures
5G CoreSession ManagementSMF

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