PDU Session is in Inactive State
The following call flows captures information on UE Idle Mode Mobility from EPS to 5GS using N26 Interface when PDU session is in inactive state.

Step |
Description |
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1 |
AMF sends a POST request towards SMF/PGW-C of each UE EPS PDN connection with following information:
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2 |
Upon receipt of such a request, if:
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2a |
SMF returns a 201 Created response including the following information:
The Location header present in the POST response contains the URI of the created SM context resource. AMF stores the association of the PDU Session ID and the SMF ID, and allocated EBI(s) associated to the PDU Session ID. If the EPS Bearer Context Status attribute is received in the request, the SMF checks whether some EPS bearer(s) of the corresponding PDU session have been deleted by the UE but not notified to the EPS. If so, SMF releases these EPS bearers, corresponding QoS rules and QoS flow level parameters locally. |
2b |
SMF returns 4xx/5xx failure response if:
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