Supported Scenarios

Path switch request is supported for:

  • Single PDU resource

  • Multiple PDU resources

  • Multiple, with some failed to handover at the target gNB

  • Multiple, with some failing at the SMF

  • Requests timing out at the SMF

  • Expiry of guard timer

  • Error conditions at the SMF: handling of the error and sending the right errors so that resources are cleared at the UE

  • Error condition at the AMF: If invalid Session ID comes in Path Switch Request Ack, in either ToBeSwithched or FailedToSetup, AMF sends Path Switch Request Failure with Unknown Session ID as the cause.

  • If SMF rejects all PDUs, then AMF sends Path Switch Request Failure with cause as HO-Failure-in-target-5GC-ngran-node-or-target-system.