Behavior Change
Previous Behavior: During 5G to Wi-Fi handover, SMF sent the following messages:
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N1 PDU Session Release command to UE without Skip-Indication flag in N1N2Transfer message
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N2 Resource Release Command Transfer message to gNB
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SmContextStatusNotify message to AMF
New Behaviour: The SMF now supports June 2019 compliance of 3GPP TS 23.502, Release 15.4.1. For 5G to Wi-Fi handover, the SMF sends the following messages:
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N2 Resource Release Command Transfer message if the user plane tunnel is active.
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N1 PDU Session Release command if the following configuration is NOT configured:
config profile compliance compliance_profile_name service threegpp23502 version uri v1 version full 1.0.2 version spec 15.6.0 exit
When N1 is sent, SMF includes Skip-Indication flag in N1N2Transfer message based on configuration under dnn-profile.
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SmContextStatus Notify message to AMF only in the following cases:
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When the SMF does not send N1N2Transfer message and if the following configuration exists:
config profile compliance compliance_profile_name service threegpp23502 version uri v1 version full 1.0.2 version spec 15.6.0 exit
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When SMF sends N1N2Transfer message and AMF responds with status code other than 4xx.
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