PDU Session Establishment in 5G

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A PDU session is a logical connection from between UE and the 5GC (more precisely with UPF in the 5GC) that connects users to any Data Network (DN). The DN may be the internet, IMS, or any enterprise network.

Important points about PDU Session

• There are two components of a PDU session:

1. The UE to NG-RAN connection is called Data Radio Bearer (DRB)
2. NG-RAN gNB to UPF connection in 5GC is an N3 tunnel.