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full Contents for  TS 23.502  Word version:   16.4.0

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1…   4.2.2.2.2   4.2.2.2.3…   4.2.3…   4.2.3.3   4.2.4…   4.2.6   4.2.7…   4.2.9…   4.3…   4.3.2.2…   4.3.2.2.2   4.3.2.2.3…   4.3.3   4.3.4   4.3.5…   4.3.5.2…   4.3.5.4…   4.3.5.6…   4.3.6…   4.4…   4.5…   4.9…   4.9.1.3…   4.9.2…   4.11…   4.11.1.2.2…   4.11.1.3…   4.11.1.4…   4.11.1.5…   4.11.2   4.11.3…   4.12…   4.12.6…   4.12a   4.12b   4.13…   4.13.4…   4.13.6…   4.14…   4.15…   4.15.4…   4.16…   4.16.4…   4.16.8…   4.17…   4.17.9…   4.18…   4.19…   4.23…   4.23.7…   4.23.9…   4.23.11…   4.24   4.25   4.26…   5…   5.2.3…   5.2.5…   5.2.6…   5.2.7…   5.2.8…   5.2.9…   5.2.12…   A…   E…   F…

 

5.2.5  PCF Services
5.2.5.1  General
The following table illustrates the PCF Services.
Service Name
Service Operations
Operation Semantics
Example Consumer (s)

Npcf_AMPolicyControl
Create
Request/Response
AMF
Update
Request/Response
AMF
UpdateNotify
Subscribe/Notify
AMF
Delete
Request/Response
AMF
Npcf_Policy Authorization
Create
Request/Response
AF, NEF
Update
Request/Response
AF, NEF
Delete
Request/Response
AF, NEF
Notify
Subscribe/Notify
AF, NEF, NWDAF
Subscribe
AF, NEF, NWDAF
Unsubscribe
AF, NEF, NWDAF
Npcf_SMPolicyControl
Create
Request/Response
SMF
UpdateNotify
Subscribe/Notify
SMF
Update
Request/Response
SMF
Delete
Request/Response
SMF
Npcf_BDTPolicyControl
Create
Request/Response
NEF
Update
Request/Response
NEF
Notify
NEF
Npcf_UEPolicyControl
Create
Request/Response
AMF, V-PCF
Update
Request/Response
AMF, V-PCF
UpdateNotify
Subscribe/Notify
AMF, V-PCF
Delete
Request/Response
AMF, V-PCF
Npcf_EventExposure
Subscribe
Subscribe/Notify
NEF, NWDAF
Unsubscribe
Notify

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5.2.5.2  Npcf_AMPolicyControl serviceWord-p. 473
5.2.5.2.1  General
Service description: NF Service Consumer, e.g. AMF, can create and manage a AM Policy Association in the PCF through which the NF Service Consumer receives AM policy control information for a UE identified by a SUPI.
As part of this service, the PCF may provide the NF Service Consumer, e.g. AMF, with AM policy information for a SUPI that may contain:
  • Access and mobility related policy information as defined in clause 6.5 of TS 23.503. In the case of roaming, this information is provided by V-PCF;
  • Policy Control Request Trigger of AM Policy Association. When such a Policy Control Request Trigger condition is met the NF Service Consumer, e.g. shall contact PCF and provide information on the Policy Request Trigger condition that has been met. In the case of roaming, the V-PCF may subscribe to AMF.
At Npcf_AMPolicyControl_Create, the NF Service Consumer, e.g. AMF requests the creation of a corresponding "AM Policy Association" with the PCF (Npcf_AMPolicyControl_Create) and provides relevant parameters about the UE context to the PCF. When the PCF has created the AM Policy Association, the PCF may provide policy information as defined above.
When a Policy Control Request Trigger condition is met the NF Service Consumer, e.g. AMF requests the update (Npcf_AMPolicyControl_Update) of the AM Policy Association by providing information on the condition(s) that have been met. The PCF may provide updated policy information to the NF Service Consumer.
The PCF may at any time provide updated policy information (Npcf_AMPolicyControl_UpdateNotify);
At UE deregistration the NF Service Consumer, e.g.AMF requests the deletion of the corresponding AM Policy Association.
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5.2.5.2.2  Npcf_AMPolicyControl_Create service operation
Service operation name:
Npcf_AMPolicyControl_Create
Description:
NF Service Consumer can request the creation of an AM Policy Association and by providing relevant parameters about the UE context to the PCF.
Inputs, Required:
SUPI.
Inputs, Optional:
Information provided by the AMF as defined in 6.2.1.2 of TS 23.503, such as Access Type, Permanent Equipment Identifier, GPSI, User Location Information, UE Time Zone, Serving Network (PLMN ID, or PLMN ID and NID, see clause 5.34 of TS 23.501), RAT type, List of subscribed Service Area Restrictions, subscribed RFSP Index, the Allowed NSSAI, GUAMI, backup AMF(s) (if NF Type is AMF). Backup AMF(s) are sent only once by the AMF to the PCF in its first interaction with the PCF.
Outputs, Required:
AM Policy Association ID.
Outputs, Optional:
The requested Access and mobility related policy information as defined in Clause 6.5 of TS 23.503, and Policy Control Request Trigger of AM Policy Association.
See clause 4.2.2.2.2 (step 16) for the detail usage of this service operation for AMF. In step 16, the AMF requests the PCF to apply operator policies for the UE.
See clause 4.16.1.2 (steps 2 and 3) for the detail usage of this service operation for AMF. In step 2, the AMF requests the PCF to apply operator policies for the UE; in step 3, the PCF acknowledges AMF with requested policy.
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5.2.5.2.3  Npcf_AMPolicyControl_UpdateNotify service operation
Service operation name:
Npcf_AMPolicyControl_UpdateNotify
Description:
Provides to the NF Service Consumer, e.g. AMF, updated AM related Policy information for the AM Policy Association as defined in clause 6.5 of TS 23.503.
NOTE:
This notification corresponds to an implicit subscription.
Inputs, Required:
AM Policy Association ID.
Inputs, Optional:
Access and Mobility related information or indication of AM Policy Association termination.
Outputs, Required:
Success or failure.
Outputs, Optional:
None.
See clause 4.16.2.2 for the usage of this service operation.
5.2.5.2.4  Npcf_AMPolicyControl_Delete service operationWord-p. 474
Service operation name:
Npcf_AMPolicyControl_Delete
Description:
Provides means for the NF Consumer to delete the AM Policy Association.
Inputs, Required:
AM Policy Association ID.
Inputs, Optional:
None.
Outputs, Required:
Success or Failure.
Outputs, Optional:
None.
See clause 4.16.3.2 (step 2 and 3) for the detail usage of this service operation for AMF. In step 2, the AMF initiates the AM Policy Association Termination procedure; in step 3 the PCF deletes the AM Policy Association for this AM Policy Association ID.
5.2.5.2.5  Npcf_AMPolicyControl_Update service operation
Service operation name:
Npcf_AMPolicyControl_Update.
Description:
NF Service Consumer, e.g. AMF can request the update of the AM Policy Association to receive updated Policy information for the UE context when the policy control request trigger is met or the AMF is relocated due to the UE mobility and the old PCF is selected.
Inputs, Required:
AM Policy Association ID.
Inputs, Optional:
Information on the Policy Control Request Trigger condition that has been met as defined in clause 6.1.2.5 of TS 23.503, GUAMI(s) (if NF Type is AMF).
Outputs, Required:
Success or not.
Outputs, Optional:
Policy information for the UE context as defined in clause 5.2.5.2.1.
See clause 4.16.2.1 for the usage of this service operation.
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5.2.5.3  Npcf_PolicyAuthorization Service
5.2.5.3.1  General
Service description: This service is to authorise an AF request and to create policies as requested by the authorized AF for the PDU Session to which the AF session is bound. Additionally this service allows an AF to exchange Ethernet port management information with DS-TT and NW-TT. This service allows the NF consumer to subscribe/unsubscribe the notification of events, which are defined in clause 6.1.3.18 of TS 23.503.
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5.2.5.3.2  Npcf_PolicyAuthorization_Create service operation
Service operation name:
Npcf_PolicyAuthorization_Create
Description:
Authorize the request, and optionally determines and installs SM Policy Control Data according to the information provided by the NF Consumer or provides Ethernet Port Management Information Container for Ethernet ports on DS-TT or NW-TT.
Inputs, Required:
UE (IP or MAC) address, identification of the application session context.
Inputs, Optional:
UE identity if available, DNN if available, S-NSSAI if available, Media type, Media format, bandwidth requirements, sponsored data connectivity if applicable, flow description, Application identifier, AF Communication Service Identifier, AF Record Identifier, Flow status, Priority indicator, emergency indicator, Application service provider, resource allocation outcome, AF Application Event Identifier, a list of DNAI(s) and corresponding routing profile ID(s) or N6 traffic routing information, AF Transaction Id, Early and/or late notifications about UP path management events, temporal validity condition and spatial validity condition as described in clause 5.6.7 of TS 23.501, Background Data Transfer Reference ID, priority sharing indicator as described in clause 6.1.3.15 of TS 23.503, pre-emption control information as described in clause 6.1.3.15 of TS 23.503, Port Management Information Container and related port number, TSN AF parameters provided by the TSN AF to the PCF as described in clause 6.1.3.23 of TS 23.503, QoS parameter(s) to be measured, Reporting frequency, Target of reporting as described in clause 6.1.3.21 of TS 23.503, Alternative Service Requirements (containing one or more QoS reference parameters in a prioritized order).
Outputs, Required:
Success or Failure (reason for failure, e.g. as defined in TS 23.503, clause 6.1.3.16, clause 6.1.3.10).
Outputs, Optional:
The service information that can be accepted by the PCF.
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5.2.5.3.3  Npcf_PolicyAuthorization_Update service operationWord-p. 475
Service operation name:
Npcf_PolicyAuthorization_Update
Description:
Provides updated information to the PCF.
Inputs, Required:
Identification of the application session context.
Inputs, Optional:
Media type, Media format, bandwidth requirements, sponsored data connectivity if applicable, flow description, Application identifier, AF Communication Service Identifier, AF Record Identifier, Flow status, Priority indicator, Application service provider, resource allocation outcome, AF Application Event Identifier, a list of DNAI(s) and corresponding routing profile ID(s) or N6 traffic routing information, AF Transaction Id, Early and/or late notifications about UP path management events, temporal validity condition and spatial validity condition as described in clause 5.6.7 of TS 23.501, Background Data Transfer Reference ID, priority sharing indicator as described in clause 6.1.3.15 of TS 23.503, pre-emption control information as described in clause 6.1.3.15 of TS 23.503, Port Management Information Container and related port number, TSN AF parameters provided by the TSN AF to the PCF as described in clause 6.1.3.23 of TS 23.503, QoS parameter(s) to be measured, Reporting frequency, Target of reporting as described in clause 6.1.3.21 of TS 23.503.
Outputs, Required:
Success or Failure (reason for failure, e.g. as defined in TS 23.503, clause 6.1.3.16).
Outputs, Optional:
The service information that can be accepted by the PCF.
Provides updated application level information and communicates with Npcf_SMPolicyControl service to determine and install the policy according to the information provided by the NF Consumer. Updates an application context in the PCF.
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5.2.5.3.4  Npcf_PolicyAuthorization_Delete service operation
Service operation name:
Npcf_PolicyAuthorization_Delete
Description:
Provides means for the NF Consumer to delete the context of application level session information.
Inputs, Required:
Identification of the application session context.
Inputs, Optional:
None.
Outputs, Required:
None.
Outputs, Optional:
None.
5.2.5.3.5  Npcf_PolicyAuthorization_Notify service operationWord-p. 476
Service operation name:
Npcf_PolicyAuthorization_Notify
Description:
provided by the PCF to notify NF consumers of the subscribed events.
Inputs, Required:
Event ID.
The events that can be subscribed are defined in clause 6.1.3.18 of TS 23.503.
Inputs, Optional:
Event information (defined on a per Event ID basis) are defined in clause 6.1.3.18 of TS 23.503, Notification Correlation Information (information to identify the application session).
Notification Correlation Information is mandatory except in the case of the Manageable Ethernet Port detected event if no AF session exists between the PCF and the AF.
Outputs, Required:
Operation execution result indication.
Outputs, Optional:
Port Management Information Container, MAC address and related port number.
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5.2.5.3.6  Npcf_PolicyAuthorization_Subscribe service operation
Service operation name:
Npcf_PolicyAuthorization_Subscribe
Description:
provided by the PCF for NF consumers to explicitly subscribe the notification of events.
Inputs, Required:
(Set of) Event ID(s) as specified in Npcf_PolicyAuthorization_Notify service operation, target of PCF event reporting (defined below), NF ID, Event Reporting Information defined in Table 4.15.1-1 (only the Event Reporting mode and the inmediate reporting flag when applicable), Notification Target Address (+ Notification Correlation ID).
The target of PCF event reporting the subscription for an individual AF session: An UE IP address (IPv4 address or IPv6 prefix) optionally together with a (DNN, S-NSSAI) or with a UE ID (SUPI or GPSI).
Inputs, Optional:
Event Filter, Subscription Correlation ID (in the case of modification of the event subscription).
Outputs, Required:
When the subscription is accepted: Subscription Correlation ID.
Outputs, Optional:
None.
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5.2.5.3.7  Npcf_PolicyAuthorization_Unsubscribe service operation
Service operation name:
Npcf_PolicyAuthorization_Unsubscribe
Description:
Enable NF consumers to explicitly unsubscribe the notification of PCF events related to Npcf_PolicyAuthorization_Subscribe operation.
Inputs, Required:
Subscription Correlation.
Inputs, Optional:
None.
Outputs, Required:
Success or Failure.
Outputs, Optional:
None.
5.2.5.4  Npcf_SMPolicyControl service
5.2.5.4.1  General
Service description: NF Service Consumer, e.g. SMF can create and manage a SM Policy Association in the PCF through which the NF Service Consumer receives policy information for a PDU Session.
As part of this service, the PCF may provide the NF Service Consumer, e.g. SMF with policy information about the PDU Session that may contain:
  • PDU Session related policy information as defined in clause 6.4 of TS 23.503.
  • PCC rule information as defined in clause 6.3 of TS 23.503.
  • Policy Control Request Trigger information i.e. a set of Policy Request Trigger(s) as defined in clause 6.1.3.5 of TS 23.503. When a Policy Control Request Trigger condition is met the NF Service Consumer, e.g. SMF shall contact the PCF and provide information on the Policy Control Request Trigger condition that has been met.
At PDU Session establishment the NF Service Consumer, e.g. SMF requests the creation of a corresponding SM Policy Association with the PCF (Npcf_SMPolicyControl_Create) and provides relevant parameters about the PDU Session to the PCF.
  • When the PCF has created the "SM Policy Association, the PCF may provide policy information as defined above.
When a Policy Control Request Trigger condition is met the NF Service Consumer, e.g. SMF requests the update(Npcf_SMPolicyControl_Update) of the SM Policy Association by providing information on the condition(s) that have been met. The PCF may provide updated policy information to the NF Service Consumer.
The PCF may at any time provide updated policy information (Npcf_SMPolicyControl_UpdateNotify).
At PDU Session Release the NF Service Consumer, e.g.SMF requests the deletion of the corresponding SM Policy Association.
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5.2.5.4.2  Npcf_SMPolicyControl_Create service operationWord-p. 477
Service operation name:
Npcf_SMPolicyControl_Create.
Description:
The NF Service Consumer can request the creation of a SM Policy Association and provide relevant parameters about the PDU Session to the PCF.
Inputs, Required:
SUPI (or PEI in the case of emergency PDU Session without SUPI), PDU Session id, DNN, S-NSSAI and RAT Type.
Inputs, Optional:
Information provided by the SMF as defined in clause 6.2.1.2 of TS 23.503, such as Access Type, the IPv4 address and/or IPv6 prefix, PEI, GPSI, User Location Information, UE Time Zone, Serving Network (PLMN ID, or PLMN ID and NID, see clause 5.34 of TS 23.501), Charging Characteristics information, Session AMBR, subscribed default QoS information, Trace Requirements and Internal Group Identifier (see TS 23.501, clause 5.9.7), NSI ID, DN Authorization Profile Index, Frame Routes. MA PDU Request indication, MA PDU Network-Upgrade Allowed indication, ATSSS capabilities of the the MA PDU Session.
Frame Routes are defined in Table 5.2.3.3.1-1.
NOTE:
If SMF receives the DN authorized Session AMBR from the DN-AAA at PDU session establishment, it includes the DN authorized Session AMBR within the Session-AMBR, instead of the subscribed Session AMBR received from the UDM, in the request.
W-5GAN specific PDU session information provided by the SMF is specified in TS 23.316.
Outputs, Required:
SM Policy Association ID defined in TS 29.512. Success or Failure.
Outputs, Optional:
Policy information for the PDU Session as defined in clause 5.2.5.4.1.
See clause 4.16.4 for the detail usage of this service operation.
See clauses 4.22.2.1 and 4.22.3 for detailed usage of this service operation for ATSSS.
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5.2.5.4.3  Npcf_SMPolicyControl_UpdateNotify service operation
Service operation name:
Npcf_SMPolicyControl_UpdateNotify
Description:
Provides to the NF Service Consumer, e.g. SMF updated Policy information for the PDU Session evaluated based on the information previously provided by the SMF, AF, CHF, UDR and NWDAF, as defined in clause 6.2.1.2 of TS 23.503,
Inputs, Required:
SM Policy Association ID.
Inputs, Optional:
Policy information for the PDU Session as defined in clause 5.2.5.4.1.
Outputs, Required:
Success or Failure.
Outputs, Optional:
None.
See clause 4.16.5.2 for the usage of this service operation.
5.2.5.4.4  Npcf_SMPolicyControl_Delete service operationWord-p. 478
Service operation name:
Npcf_SMPolicyControl_Delete
Description:
The NF Service Consumer can request the deletion of the SM Policy Association and of the associated resources.
Inputs, Required:
SM Policy Association ID.
Inputs, Optional:
5G SRVCC indication.
Outputs, Required:
Success or Failure.
Outputs, Optional:
None.
See clause 4.16.6 for the usage of this service operation.
When the PDU session for IMS is released due to PS to CS handover for 5G SRVCC, SMF indicate the 5G SRVCC indication received from AMF to PCF.
5.2.5.4.5  Npcf_SMPolicyControl_Update service operation
Service operation name:
Npcf_SMPolicyControl_Update.
Description:
The NF Service Consumer can request the update of the SM Policy Association to receive updated Policy information for the PDU Session.
Inputs, Required:
SM Policy Association ID.
Inputs, Optional:
Information on the Policy Control Request Trigger condition, as defined in clause 6.1.3.5 of TS 23.503, that has been met such as Access Type, (new or removed) IPv4 address and/or IPv6 network prefix, User Location Information, UE Time Zone, Serving Network, RAT type, Session AMBR, or subscribed default QoS information, DN Authorization Profile Index, 5GS bridge information [Bridge Address (unique MAC address that identifies the bridge used to derive the bridge ID), DS-TT MAC address, port number of DS-TT port, port numbers of NW-TT ports, UE-DS-TT Residence Time], Port Management Information Container and the related port number, MA PDU Request indication, MA PDU Network-Upgrade Allowed indication, ATSSS capabilities of the the MA PDU Session.
W-5GAN specific PDU session information provided by the SMF is specified in TS 23.316.
Outputs, Required:
Success or not.
Outputs, Optional:
Policy information for the PDU Session as defined in clause 5.2.5.4.1.
See clause 4.16.5.1 for the usage of this service operation.
NOTE:
When this service operation is invoked by SMF, race conditions apply, which are defined in TS 29.513.
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5.2.5.5  Npcf_BDTPolicyControl Service
5.2.5.5.1  General
Service description: This service provides background data transfer policy, which includes the following functionalities:
  • Get background data transfer policies based on the request via NEF from AF; and
  • Update background data transfer based on the selection provided by AF.
5.2.5.5.2  Npcf_BDTPolicyControl_Create service operationWord-p. 479
Service operation name:
Npcf_BDTPolicyControl_Create
Description:
This service is to create the background data transfer policy.
Inputs, Required:
ASP identifier, Volume per UE, Number of UEs, Desired time window.
Inputs, Optional:
Internal Group Identifier, Network Area Information, Request for notification.
Outputs, Required:
one or more background data transfer policies, Background Data Transfer Reference ID.
Outputs, Optional:
None.
5.2.5.5.3  Npcf_BDTPolicyControl_Update service operation
Service operation name:
Npcf_BDTPolicyControl_Update
Description:
This service is to update the background data transfer policy to the PCF.
Inputs, Required:
ASP identifier, background data transfer policy, Background Data Transfer Reference ID.
Inputs, Optional:
Reset for notification.
Outputs, Required:
None
Outputs, Optional:
None.
5.2.5.5.4  Npcf_BDTPolicyControl_Notify service operation [R16]
Service operation name:
Npcf_BDTPolicyControl_Notify
Description:
This service operation sends the BDT warning notification to the NF consumer.
Inputs (required): Background data transfer reference ID.
Inputs (optional): Network Area Information, Time window, list of candidate Background Data Transfer policies.
Outputs (required): None.
Outputs (optional): None.
5.2.5.6  Npcf_UEPolicyControl Service
5.2.5.6.1  General
Service description: NF Service Consumer, e.g. AMF, may create and manage a UE Policy Association in the PCF through which the NF Service Consumer receives Policy Control Request Trigger of UE Policy Association.
The association allows (V-)PCF to provide UE access selection and PDU Session selection related policy information to the UE transparently through the NF Service Consumer using NAS TRANSPORT message to carry:
  • UE access selection and PDU Session selection related policy information as defined in clause 6.6 of TS 23.503. In the case of roaming, the URSP rules are provided by H-PCF and the ANDSP rules may be provided by V-PCF or H-PCF or both.
As part of this service, the PCF may provide the NF Service Consumer, e.g. AMF, with policy information about the UE that may contain:
  • Policy Control Request Trigger of UE Policy Association. When such a Policy Control Request Trigger condition is met, the NF Service Consumer, e.g. AMF, shall contact PCF and provide information on the Policy Request Trigger condition that has been met. In the case of roaming, the V-PCF may subscribe to AMF or the H-PCF may subscribe to AMF via V-PCF.
At Npcf_UEPolicyControl_Create, the NF Service Consumer, e.g. AMF, requests the creation of a corresponding "UE Policy Association" with the PCF (Npcf_UEPolicyControl_Create) and provides relevant parameters about the UE context to the PCF. When the PCF has created the UE Policy Association, the PCF may provide policy information as defined above.
When a Policy Control Request Trigger condition is met, the NF Service Consumer, e.g. AMF, requests the update (Npcf_UEPolicyControl_Update) of the UE Policy Association by providing information on the condition(s) that have been met. The PCF may provide updated policy information to the NF Service Consumer.
During the AMF relocation, if the target AMF receives the PCF ID from source AMF and the target AMF decides to contact with the PCF identified by the PCF ID based on the local policies, the target AMF requests the update (Npcf_UEPolicyControl_Update) of the UE Policy Association. If a Policy Control Request Trigger condition is met, the information matching the trigger condition may also be provided by the target AMF. The PCF may provide updated policy information to the target AMF.
The PCF may at any time provide updated policy information (Npcf_UEPolicyControl_UpdateNotify).
At UE deregistration the NF Service Consumer, e.g.AMF, requests the deletion of the corresponding UE Policy Association.
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5.2.5.6.2  Npcf_UEPolicyControl_Create service operationWord-p. 480
Service operation name:
Npcf_UEPolicyControl_Create
Description:
NF Service Consumer can request the creation of a UE Policy Association by providing relevant parameters about the UE context to the PCF.
Inputs, Required:
Notification endpoint, SUPI.
Inputs, Optional:
H-PCF ID (if the NF service producer is V-PCF and AMF is NF service consumer), information provided by the AMF as define in 6.2.1.2 of TS 23.503, such as Access Type, Permanent Equipment Identifier, GPSI, User Location Information, UE Time Zone, Serving Network (PLMN ID, or PLMN ID and NID, see clause 5.34 of TS 23.501), RAT type, UE access selection and PDU session selection policy information including the list of PSIs, OS id and Internal Group (see TS 23.501
Outputs, Required:
Success or Failure, UE Policy Association ID.
Outputs, Optional:
Policy Control Request Trigger of UE Policy Association. In the case of H-PCF is producer, UE access selection and PDU Session selection related policy information (see clause 5.2.5.6.1).
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5.2.5.6.3  Npcf_UEPolicyControl_UpdateNotify service operation
Service operation name:
Npcf_UEPolicyControl_UpdateNotify
Description:
Provides to the NF Service Consumer updated Policy information for the UE context evaluated based on the information previously provided by the PCF.
NOTE:
This notification corresponds to an implicit subscription.
Inputs, Required:
Notification endpoint, UE Policy Association ID.
Inputs, Optional:
Policy Control Request Trigger of UE Policy Association. In the case of H-PCF is producer, UE Access and PDU session related information as defined in clause 5.2.5.1.
Outputs, Required:
Success or failure.
Outputs, Optional:
None.
5.2.5.6.4  Npcf_UEPolicyControl_Delete service operation
Service operation name:
Npcf_UEPolicyControl_Delete
Description:
Provides means for the NF Consumer to delete the UE policy control association.
Inputs, Required:
UE Policy Association ID.
Inputs, Optional:
None.
Outputs, Required:
Success or Failure.
Outputs, Optional:
None.
5.2.5.6.5  Npcf_UEPolicyControl_Update service operationWord-p. 481
Service operation name:
Npcf_UEPolicyControl_Update
Description:
NF Service Consumer, e.g. AMF can request the update of the UE Policy Association to receive updated Policy information for the UE context.
Inputs, Required:
UE Policy Association ID.
Inputs, Optional:
Information on the UE policy related Policy Control Request Trigger condition that has been met, as defined in Table 6.1.2.5-1 in TS 23.503.
Outputs, Required:
Success or Failure.
Outputs, Optional:
Policy Control Request Trigger of UE Policy Association. In the case of H-PCF is producer, UE access selection and PDU Session selection related policy information.
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5.2.5.7  Npcf_EventExposure service
5.2.5.7.1  General
Service description: This service enables an NF to subscribe and get notified about PCF events for a group of UE(s) or any UE accessing a combination of (DNN, S-NSSAI).
The events can be subscribed by a NF consumer are described in TS 23.503, clause 6.1.3.18.
The following service operations are defined for the Npcf_EventExposure service:
  • Npcf_EventExposure_Subscribe.
  • Npcf_EventExposure_UnSubscribe.
  • Npcf_EventExposure_Notify.
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5.2.5.7.2  Npcf_EventExposure_Subscribe service operation
Service operation name:
Npcf_EventExposure_Subscribe.
Description:
The consumer NF uses this service operation to subscribe to or modify event reporting for a group of UE(s) or any UE accessing a combination of (DNN, S-NSSAI).
NF Consumers: NEF.
Inputs (required): NF ID, Target of Event Reporting (Internal Group Identifier or indication that any UE accessing a combination of (DNN, S-NSSAI)is targeted, (set of) Event ID(s) defined in clause 5.2.5.7.1, Notification Target Address (+ Notification Correlation ID) and Event Reporting Information defined in Table 4.15.1-1.
Inputs (optional): Event Filter (s) associated with each Event ID.
Outputs (required): Operation execution result indication. When the subscription is accepted: Subscription Correlation ID.
Outputs (optional): First corresponding event report is included, if corresponding information is available (see clause 4.15.1).
The NF consumer subscribes to the event notification by invoking Npcf_EventExposure to the PCF. The PCF allocates a Subscription Correlation ID for the subscription and responds to the consumer NF with the Subscription Correlation ID. Event receiving NF ID identifies the NF that shall receive the event reporting.
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5.2.5.7.3  Npcf_EventExposure_Unsubscribe service operationWord-p. 482
Service operation name:
Npcf_EventExposure_Unsubscribe.
Description:
The NF consumer uses this service operation to unsubscribe for a specific event for a group of UE(s) or any UE accessing a combination of (DNN, S-NSSAI).
Inputs (required): Subscription Correlation ID.
Input, Optional:
None.
Outputs (required): Operation execution result indication.
Output, Optional:
None.
5.2.5.7.4  Npcf_EventExposure_Notify service operation
Service operation name:
Npcf_EventExposure_Notify.
Description:
This service operation reports the event to the consumer that has previously subscribed.
Inputs (required): Event ID, corresponding UE ID (GPSI), Notification Correlation Information, time stamp.
Inputs (optional): None.
Outputs (required): None.

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