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full Table of Contents for  TS 38.413  Word version:   16.0.0

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8  NGAP Procedures
8.1  List of NGAP Elementary Procedures
8.2  PDU Session Management ProceduresWord-p. 20
8.2.1  PDU Session Resource Setup
8.2.1.1  General
The purpose of the PDU Session Resource Setup procedure is to assign resources on Uu and NG-U for one or several PDU sessions and the corresponding QoS flows, and to setup corresponding DRBs for a given UE. The procedure uses UE-associated signalling.
8.2.1.2  Successful OperationWord-p. 21
8.2.1.3  Unsuccessful OperationWord-p. 23
8.2.1.4  Abnormal Conditions
8.2.2  PDU Session Resource ReleaseWord-p. 24
8.2.2.1  General
The purpose of the PDU Session Resource Release procedure is to enable the release of already established PDU session resources for a given UE. The procedure uses UE-associated signalling.
8.2.2.2  Successful Operation
8.2.2.3  Unsuccessful OperationWord-p. 25
8.2.2.4  Abnormal Conditions
8.2.3  PDU Session Resource Modify
8.2.3.1  General
The purpose of the PDU Session Resource Modify procedure is to enable configuration modifications of already established PDU session(s) for a given UE. It is also to enable the setup, modification and release of the QoS flow for already established PDU session(s). The procedure uses UE-associated signalling.
8.2.3.2  Successful Operation
8.2.3.3  Unsuccessful OperationWord-p. 27
8.2.3.4  Abnormal Conditions
8.2.4  PDU Session Resource NotifyWord-p. 28
8.2.4.1  General
The purpose of the PDU Session Resource Notify procedure is to notify that the already established QoS flow(s) or PDU session(s) for a given UE are released or not fulfilled anymore or fulfilled again by the NG-RAN node for which notification control is requested. The procedure uses UE-associated signalling.
8.2.4.2  Successful Operation
8.2.4.3  Abnormal ConditionsWord-p. 29
8.2.5  PDU Session Resource Modify Indication
8.2.5.1  General
The purpose of the PDU Session Resource Modify Indication procedure is for the NG-RAN node to request modification of the established PDU session(s). The procedure uses UE-associated signalling.
8.2.5.2  Successful Operation
8.2.5.3  Unsuccessful OperationWord-p. 30
8.2.5.4  Abnormal Conditions
8.3  UE Context Management Procedures
8.3.1  Initial Context SetupUp
8.3.1.1  General
The purpose of the Initial Context Setup procedure is to establish the necessary overall initial UE context at the NG-RAN node, when required, including PDU session context, the Security Key, Mobility Restriction List, UE Radio Capability and UE Security Capabilities, etc. The AMF may initiate the Initial Context Setup procedure if a UE-associated logical NG-connection exists for the UE or if the AMF has received the RAN UE NGAP ID IE in an INITIAL UE MESSAGE message or if the NG-RAN node has already initiated a UE-associated logical NG-connection by sending an INITIAL UE MESSAGE message via another NG interface instance. The procedure uses UE-associated signalling.
For signalling only connections and if the UE Context Request IE is not received in the Initial UE Message, the AMF may be configured to trigger the procedure for all NAS procedures or on a per NAS procedure basis depending on operator's configuration.
8.3.1.2  Successful OperationWord-p. 31
8.3.1.3  Unsuccessful OperationWord-p. 33
8.3.1.4  Abnormal Conditions
8.3.2  UE Context Release Request (NG-RAN node initiated)
8.3.2.1  General
The purpose of the UE Context Release Request procedure is to enable the NG-RAN node to request the AMF to release the UE-associated logical NG-connection due to NG-RAN node generated reasons. The procedure uses UEassociated signalling.
8.3.2.2  Successful OperationWord-p. 34
8.3.2.3  Abnormal Conditions
8.3.3  UE Context Release (AMF initiated)
8.3.3.1  GeneralUp
The purpose of the UE Context Release procedure is to enable the AMF to order the release of the UE-associated logical NG-connection due to various reasons, e.g., completion of a transaction between the UE and the 5GC, or release of the old UE-associated logical NG-connection when the UE has initiated the establishment of a new UE-associated logical NG-connection, etc. The procedure uses UE-associated signalling.
8.3.3.2  Successful Operation
8.3.3.3  Unsuccessful OperationWord-p. 35
8.3.3.4  Abnormal Conditions
8.3.4  UE Context Modification
8.3.4.1  General
The purpose of the UE Context Modification procedure is to partly modify the established UE context. The procedure uses UE-associated signalling.
8.3.4.2  Successful Operation
8.3.4.3  Unsuccessful OperationWord-p. 37
8.3.4.4  Abnormal Conditions
8.3.5  RRC Inactive Transition Report
8.3.5.1  GeneralUp
The purpose of the RRC Inactive Transition Report procedure is to notify the AMF when the UE enters or leaves RRC_INACTIVE state. The procedure uses UE-associated signalling.
8.3.5.2  Successful Operation
8.3.5.3  Abnormal Conditions

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