Content for  TS 23.502  Word version:  17.6.0

Nucmf_Provisioning_Create

The consumer creates a UCMF dictionary entry (or more entries) for a Manufacturer-assigned UE Radio Capability ID(s). For each UE Radio Capability ID the following inputs are provided:

(list of) [UE Radio Capability ID(s), set(s) of UE radio access capability set and UE Radio Capability for Paging and respective Coding format(s), (list of) IMEI/TAC value(s)].

None.

None.

None.

Nucmf_Provisioning_Delete

The consumer deletes a UCMF dictionary entry(s) for a Manufacturer-assigned UE Radio Capability ID(s). The consumer provides a (list of) UE radio capability ID value(s) to be deleted or it may provide the IMEI/TAC values for which the associated UE radio capability ID entries shall be no longer used.

UE Radio Capability ID(s) of the UCMF dictionary entry(s) to be deleted or IMEI/TAC that no longer use associated UE radio Capability ID(s).

None.

None.

None.

Nucmf_Provisioning_Update

The consumer updates the list of IMEI/TAC values a UCMF dictionary entry (or a list of entries) applies to for a Manufacturer-assigned UE Radio Capability ID. For each UE Radio Capability ID provided, (a list of) UE model(s) IMEI/TAC value(s) to be added or removed to the related UCMF entry is provided.

Update Type (one of "Add IMEI/TAC Values" or "Remove IMEI/TAC Values") and:

• If Update Type is "Add IMEI/TAC Values", the (list of) UE Radio Capability ID(s) of the UCMF dictionary entry(ies) to be updated and the related additional (list of) IMEI/TAC(s); or
• If Update Type is "Remove IMEI/TAC Values", the (list of) UE Radio Capability ID(s) of the UCMF dictionary entry(ies) to be updated and the related (list of) IMEI/TAC(s) to be removed.

None.

None.

None.

Nucmf_UECapabilityManagement_Resolve

Consumer NF gets the UE Radio Access Capability and one or more UE Radio Capability for Paging corresponding to a specific UE Radio Capability ID (either Manufacturer-assigned or PLMN-assigned) and Coding Format.

UE Radio Capability ID, Coding format, one or more UE Radio Capability for Paging.

None.

UE Radio Access Capability, UE Radio Capability for Paging.

None.

Nucmf_UECapabilityManagement_Assign

The NF consumer sends to the UCMF:

• the UE Radio Access Capability (and its Coding Format); or
• the UE Radio Access Capability and UE Radio Capability for Paging in both TS 36.331 and TS 38.331 coding formats;

and obtains a PLMN-assigned UE Radio Capability ID in return.

E Radio Access Capability(s), UE Radio Capability for Paging(s), Coding format(s), IMEI/TAC.

One or more UE Radio Capability for Paging.

UE Radio Capability ID.

None.

Nucmf_UECapabilityManagement_Subscribe

The NF consumer subscribes for updates to UCMF dictionary entries and provides the coding format in which UE Radio Access Capability is expected by NF. The UCMF shall check the requested consumer is authorized to subscribe to requested updates.

Coding format.

None.

None.

None.

Nucmf_UECapabilityManagement_Unsubscribe

The NF consumer unsubscribes from updates to UCMF dictionary entries.

None.

None.

None.

None.

Nucmf_UECapabilityManagement_Notify

Producer NF provides notifications about changes in UCMF to subscribed consumer NF.

Notification Type ("creation", "deletion", "Added IMEI/TAC in Manufacturer Assigned operation requested list", "Removed IMEI/TAC from Manufacturer Assigned operation requested list", "Removed UE Radio Capability ID from Manufacturer Assigned operation requuested list").

If Notification Type is set to "creation": One or more UCMF dictionary entries, each UCMF dictionary entry consisting of a UE Radio Capability ID and the corresponding UE Radio Access Capability. If Notification Type is set to "deletion": One or more UE Radio Capability IDs. If Notification Type is set to "Added IMEI/TAC in Manufacturer Assigned operation requested list" or "Removed IMEI/TAC from Manufacturer Assigned operation requested list", one or more IMEI/TACs, if Notification type is "Removed UE Radio Capability ID from Manufacturer Assigned operation requested list", one or more PLMN assigned UE radio Capability IDs.

None.

None.

Naf_EventExposure_Subscribe

The consumer NF subscribes the event to collect AF data for UE(s), group of UEs, or any UE, or updates the subscription which is already defined in AF.

Target of Event Reporting (either UE ID(s), or UE IPv4 address(es), or UE IPv6 prefix(es), or Internal/External Group Identifier, or indication that any UE is targeted), (set of) Event ID(s), Notification Target Address (+ Notification Correlation ID) and Event Reporting Information as defined in Table 4.15.1-1.

NF ID, Event Filter(s) associated with each Event ID, (set of) External Application Identifier(s), Subscription Correlation ID (in the case of modification of the existing subscription), Expiry time.

Operation execution result indication. When the subscription is accepted: Subscription Correlation ID, Expiry time (required if the subscription can be expired based on the local policy).

First corresponding event report is included, if corresponding information is available (see clause 4.15.1).

Naf_EventExposure_Unsubscribe

The consumer NF unsubscribes for a specific event.

Subscription Correlation ID.

None.

Operation execution result indication.

None.

Naf_EventExposure_Notify

The AF provides the previously subscribed event information to the consumer NF which has subscribed to that event before.

Notification Correlation Information, Event ID, corresponding UE ID(s) (either external UE ID(s), or Internal/External Group Identifier, or UE IP v4 address(es) or UE IP v6 prefix(es), time stamp.

Event specific parameter list.

None.

None.

The NSSAAF provides Network Slice- Specific Authentication and Authorization (NSSAA) service to the requester NF by relaying EAP messages towards a AAA-S or AAA-P and performing related protocol conversion as needed. It also provides notification to the current AMF where the UE is of the need to re-authenticate and re-authorize the UE or to revoke the UE authorization. The AMF to receive the notification is implicitly subscribed and it is found in the UDM by providing the UE GPSI.

The NSSAAF provides Authentication and Authorization service to the requester NF by relaying EAP messages towards a AAA-S or AAA-P and performing related protocol conversion as needed.

The Nnsacf_NSAC services control the number of UEs registered with a network slice and the number of PDU Sessions associated with a network slice for the network slices subject to NSAC. The consumer NF (e.g. AMF) can request the NSACF to check whether the number of UEs registered with a network slice has reached the maximum number of UEs per network slice and the consumer NF can also request the NSACF to update the number of UEs registered with a network slice. The SMF can request the NSACF to check whether the number of PDU Sessions established on a network slice has reached the maximum number of PDU Sessions per network slice and the SMF can also request the NSACF to update the number of PDU Sessions established on a network slice.

Nnsacf_NSAC_NumOfUEsUpdate

Updates the number of UEs registered with a network slice (e.g. increase or decrease) when the UE registration status for a network slice subject to NSAC has changed. Also, if the number of the UEs registered with the network slice is to be increased and the Early Availability Check (EAC) mode in the NSACF is activated for that network slice (see Nnsacf_NSAC_EACNotify service operation), the NSACF first checks whether the number of UEs registered with the network slice has reached the maximum number of UEs per network slice threshold. If the maximum number of UEs registered with the network slice has already been reached, the UE registration for that network slice via the same Access Type configured in the NSACF is rejected. If the EAC is not activated, the NSACF increases or decreases the number of UEs per network slice as per the input parameters below.

S-NSSAI(s), UE ID (SUPI), NF ID, Access Type, update flag.

Notification endpoint for EAC Notification for the S-NSSAI. The S-NSSAI(s) parameter is a list of one or more network slices for which the number of UEs registered with a network slice is to be updated and checked if the maximum number of UEs per network slice threshold has already been reached. The UE ID parameter is used by the NSACF to maintain a list of UE IDs registered with the network slice. The NSACF also takes Access Type into account for increasing and decreasing the number of UEs per network slice as described in clause 5.15.11.1 of TS 23.501. The NF ID parameter is the NF instance ID of the NF (e.g. AMF or SMF + PGW-C) sending the request to the NSACF. The update flag input parameter indicates whether the number of UEs registered with a network slice is to be:

• increased when the UE registers to a new network slice subject to NSAC. If the UE ID is already in the list of UEs registered with the network slice, the number of UEs registered with the network slice is not increased as the UE has already been counted as registered with the network slice. If the UE ID is not in the list of UE IDs registered with the network slice and the maximum number of UEs registered with the network slice has not been reached yet, the NSACF adds the UE ID in the list of UEs registered with the network slice and increases the number of the UEs registered with the network slice. If the UE_ID is not in the list of UEs registered with that S-NSSAI and the maximum number of UEs per network slice for that S-NSSAI has already been reached, then the NSACF returns maximum number of UEs per network slice reached result;
• decreased when the UE deregisters for a network slice that is subject to NSAC. The NSACF decreases the number of the UEs registered with the network slice and removes the UE ID from the list of UEs registered with the network slice.

The NSACF may optionally return the current status of the network slice availability (e.g. a percentage out of the maximum number of UEs registered with a network slice) in the availability status parameter. This information may be used for NSACF signalling and load balancing in case multiple NSACFs are serving the same network slice.

Result indication. The Result indication parameter contains the outcome of the update and check operation in the NSACF and may indicate one of the values 'maximum number of UEs for the S-NSSAI not reached' or 'maximum number of UEs for the S-NSSAI reached'.

None.

Nnsacf_NSAC_EACNotify

The NSACF is configured with the information about which network slices are subject to NSAC. The NSACF may trigger notification to the consumer NF (e.g. AMF) to indicate the activation of the Early Availability Check (EAC) mode for a certain network slice which is subject to NSAC when the number of the UEs registered with the network slice is above certain operator defined threshold (e.g. a percentage of the maximum number of UEs allowed to register with the network slice) and the deactivation of the EAC mode when the number of the UEs registered with the network slice is below certain operator defined threshold which may be same or different from the activation threshold.

S-NSSAI(s), EAC flag(s). The S-NSSAI input parameter is the network slice for which the NSACF activates or deactivates the EAC mode. The EAC flag input parameter indicates whether the Slice EAC mode is activated or deactivated.

None.

None.

None.

Nnsacf_NSAC_NumOfPDUsUpdate

Updates the number of PDU Sessions established on a network slice (e.g. increase or decrease). Also, if the number of PDU Sessions on the network slice is to be increased, the NSACF first checks whether the number of the PDU Sessions on that network slice has reached the maximum number of PDU Sessions per network slice. If the maximum number of PDU Sessions on the network slice has already been reached, the PDU Session Establishment procedure is rejected.

S-NSSAI, UE ID, PDU Session ID, Access Type, update flag. The S-NSSAI parameter is the network slice for which the number of PDU Sessions established on a network slice is to be updated. The UE ID parameter is used by the NSACF to maintain a list of UE IDs that has established PDU sessions with the network slice. PDU Session ID parameter is used by the NSACF to maintain for each UE ID, the PDU Session ID(s) for established PDU Sessions. The Access Type parameter indicates over which access network type the PDU Session is established. In the case of MA-PDU Session, one or multiple Access Types may be included for a PDU Session ID. The update flag input parameter indicates 'increase', 'decrease' or 'update' as specified in clause 4.2.11.4.

None.

Result indication, Access Type. The Result indication parameter contains the outcome of the update and check operation in the NSACF and may indicate one of the values 'maximum number of PDU Sessions for the S-NSSAI not reached' or 'maximum number of PDU Sessions for the S-NSSAI reached'. The Access Type parameter is associated with the Result indication parameter.

None.

The Nnsacf_SliceEventExposure services provide event based notifications to the consumer NF related to the current number of UEs registered for a network slice or/and the current number of PDU Sessions established on a network slice.

Nnsacf_SliceEventExposureSubscribe

This service operation is used by the consumer NF to subscribe or modify a subscription with the NSACF for event based notifications of the current number of UEs registered for a network slice or the current number of PDU Sessions established on a network slice.

Event ID, Event Filter, Event Reporting information. The Event ID parameter defines whether to notify the number of UEs registered with a network slice or the number of PDU Sessions established on a network slice. The Event Filter parameter is the S-NSSAI for which the current number of UEs registered for a network slice or the current number of PDU Sessions established on a network slice or both are to be notified to the consumer NF. The Event Reporting information parameter defines whether the notification is threshold based (e.g. the notification is triggered when the current number of UEs or PDU Sessions with a network slice reaches a defined threshold value) or the notification is periodical (e.g. the notification is triggered at expiry of a periodic timer) and optionally the Immediate reporting flag.

Notification threshold, Notification periodicity. The Notification threshold parameter is optional. It is provided when the Notification is threshold base. The notification threshold parameter may be a numeric value or a percentage of the maximum number of the UEs or PDU Sessions per network slice. The Notification periodicity parameter is optional. It is provided when the Notification is periodical. The Notification periodicity parameter defines the time between the notification periodicity.

Operation execution result response, Subscription Correlation Id.

Nnsacf_SliceEventExposure_Unsubscribe

This service operation is used by the consumer NF to unsubscribe from the event notification.

Subscription Correlation Id.

Operation execution result response.

Nnsacf_SliceEventExposure_Notify

This service operation is used by the NSACF to report the current number of UEs registered with a network slice or the current number of PDU Sessions established on a network slice in numbers or in percentage from the maximum allowed numbers, based on threshold or at expiry of periodic timer.

Event ID, Event Filter, Event Reporting information, Notification Correlation Information. The Event ID parameter defines the type of the reported information, i.e. the number of UEs registered with a network slice or the number of PDUs Sessions established on a network slice. The Event Filter parameter is the S-NSSAI for which the Notification applies. The Event Reporting information parameter provides the network slice status information in terms of the current number of UEs registered with a network slice or the current number of PDU Sessions established on a network slice. If the Notification is threshold based where the threshold is a certain number of UEs registered with a network slice or PDU Sessions established on a network slice or the threshold is a percentage of the maximum number of UEs registered with a network slice or the maximum number of PDU Sessions established on a network slice, the Event Reporting information parameter contains confirmation for reaching this threshold value. If the Notification is periodical, the Event Reporting information parameter provides information for the current number of UEs registered with a network slice (e.g. represented in percentage of the maximum number of the UEs registered with the network slice) or information for the current number of PDU Sessions established on a network slice (e.g. represented in percentage of the maximum number of the PDU Sessions established on the network slice) with periodicity provided during the subscription.

None.

This service can expose UPF related information to other NFs. There is one operation for this service:

• Notifying events on the PDU Session to the NFs.

The following events can be notified to a NF consumer:

• QoS Monitoring for URLLC: the event notification may contain the QoS Monitoring report as described in clause 5.33.3.2 of TS 23.501.

The event notification may contain following information:

• QoS monitoring result e.g. end to end delay for specific QoS flow or for specific PDU session.

Nupf_EventExposure_Notify

This service operation reports the event and information to the consumer that has subscribed implicitly.

Event ID, UE address (i.e. IP address or MAC address).

Event specific parameter as described in clause 5.2.26.2.1.

Result Indication.

None.

This service provides:

• Request authorization of NF Service Consumer requests.
• NF Service Consumer request to create update and delete time synchronization configuration and to activate and deactivate the time synchronization service as described in clause 5.27.1.8 of TS 23.501.

Ntsctsf_TimeSynchronization_ConfigCreate

Authorize the request, create a time synchronization configuration and activate the time synchronization service with the configuration.

Reference to time synchronization capability set (i.e. the Subscription Correlation ID as in the response to Ntsctsf_TimeSynchronization_CapsSubscribe request), user plane node ID, mandatory service parameters as described in Table 4.15.9.3-1, Notification Target Address.

Optional service parameters as described in Table 4.15.9.3-1.

Operation execution result indication, in successful operation the PTP instance reference.

None.

Ntsctsf_TimeSynchronization_ConfigUpdate

Authorize the request and forward the request to update the time synchronization configuration.

PTP instance reference.

List of UE identities (SUPIs) to be added to the time synchronization configuration. List of UE identities (SUPIs) to be removed from the time synchronization configuration. (g)PTP grandmaster enabled, grandmaster priority, Time Domain, Temporary Validity Condition as described in Table 4.15.9.3-1.

Operation execution result indication.

None.

Ntsctsf_TimeSynchronization_ConfigDelete

Authorize the request, delete the time synchronization configuration and deactivate the corresponding time synchronization service.

PTP instance reference.

None.

Operation execution result indication.

None.

Ntsctsf_TimeSynchronization_ConfigUpdateNotify

Forward the notification for the time synchronization configuration. When the TSCTSF detects a change corresponding to a time synchronization configuration, it invokes Ntsctsf_TimeSynchronization_ConfigUpdateNotify service operation to the NF consumer(s) which has subscribed for the event. The following Table describes the parameters in the event.

PTP instance reference, current state of the time synchronization configuration (i.e. whether the time synchronization configuration is active or not for the PTP ports of the PTP instance).

None.

Operation execution result indication.

None.

Ntsctsf_TimeSynchronization_CapsSubscribe

The AF subscribes to receive notification about time synchronization capabilities for a list of UE(s) or a group of UEs or any UE using DNN/S-NSSAI combination. Event Filters are used to specify the conditions to match for notifying the event. If there are no conditions to match then the Event Filter is not provided. The following Table describes the Event Filters supported by the service:

Either a combination of (DNN, S-NSSAI) or an AF-Service-Identifier and Notification Target Address.

Event Filter(s) as described in Table 5.2.27.2.6-1, Report Type (can be either one-time reporting, periodic reporting or event based reporting).

Operation execution result indication. When the subscription is accepted: Subscription Correlation ID, Expiry time.

None.

Ntsctsf_TimeSynchronization_CapsUnsubscribe

The AF unsubscribes to receive notification about time synchronization for a UE or a group of UEs or any UE using a DNN/S-NSSAI combination.

Subscription Correlation ID.

None.

Operation execution result indication.

None.

Ntsctsf_TimeSynchronization_CapsNotify

Forward the notification for the time synchronization configuration. When the TSCTSF detects an event corresponding to a Subscription, it invokes Ntsctsf_TimeSynchronization_CapsNotify service operation to the NF consumer(s), e.g. a NEF or an AF within the operator's domain, that has subscribed for the event. The following Table describes the parameters in the event.

Subscription Correlation ID.

Time synchronization capabilities as described in Table 5.2.27.2.8-1.

Operation execution result indication.

None.

This service provides:

Ntsctsf_QoSandTSCAssistance_Create

The consumer requests the network to provide a specific QoS for an AF session.

AF Identifier, UE address, Flow description(s) or External Application Identifier, QoS Reference.

time period, traffic volume, Alternative Service Requirements (containing one or more QoS reference parameters in a prioritized order), QoS parameter(s) to be measured, Reporting frequency, Target of reporting as described in clause 6.1.3.21 of TS 23.503, individual QoS parameters as described in clause 6.1.3.22 of TS 23.503, DNN if available, S-NSSAI if available, Requested Alternative QoS Parameter Set(s) as described in clause 6.1.3.22 of TS 23.503.

Transaction Reference ID, result.

None.

Ntsctsf_QoSandTSCAssistance_Update

The consumer requests the network to update the QoS and/or additional Alternative QoS for an AF session.

Transaction Reference ID.

Flow description, QoS reference, time period, traffic volume, Alternative Service Requirements (containing one or more QoS reference parameters in a prioritized order), QoS parameter(s) to be measured, Reporting frequency, Target of reporting as described in clause 6.1.3.21 of TS 23.503, individual QoS parameters as described in clause 6.1.3.22 of TS 23.503, Requested Alternative QoS Parameter Set(s).

Result.

None.

Ntsctsf_QoSandTSCAssistance_Delete

The consumer requests the network to delete the AF session with requested QoS or the AF session with requested QoS including Alternative Service Requirements.

Transaction Reference ID.

None.

Transaction Reference ID, result.

None.

Ntsctsf_QoSandTSCAssistance_Notify

TSCTSF reports the QoS Flow level event(s) to the consumer.

Transaction Reference ID, Reports of the events as defined in clause 6.1.3.18 of TS 23.503.

When the event report is for QoS Monitoring for URLLC, includes Packet delay for UL, DL, or round trip of the single UP path or two UP paths in the case of redundant transmission, as defined in clause 5.33.3.2 of TS 23.501.

None.

None.

Ntsctsf_QoSandTSCAssistance_Subscribe

The consumer requests the network to subscribe to receive an event about the AF session with requested QoS or the AF session with requested QoS including Alternative Service Requirements.

Transaction Reference ID, (Set of) Event ID(s) as specified in clause 6.1.3.18 of TS 23.503.

None.

Transaction Reference ID, result.

None.

Ntsctsf_QoSandTSCAssistance_unsubscribe

The consumer requests the network to unsubscribe to receive an event about the AF session with requested QoS or the AF session with requested QoS including Alternative Service Requirements.

Transaction Reference ID, (Set of) Event ID(s) as specified in clause 6.1.3.18 of TS 23.503.

None.

Result.

None.

This service provides:

Ntsctsf_ASTI_Create

Authorize the request, activate the 5G access stratum time distribution.

Target for 5G access stratum time distribution (one UE identified by a SUPI or a GPSI, a group of UEs identified by an Internal Group Identifier or an External Group Identifier), AF identifier, mandatory service parameters as described in Table 4.15.9.4-1.

Optional service parameters as described in Table 4.15.9.4-1.

Operation execution result indication, in successful operation the time synchronization configuration id.

None.

Ntsctsf_ASTI_Update

Authorize the request and forward the request to update the 5G access stratum time distribution configuration.

Time synchronization configuration id.

service parameters as in Ntsctsf_ASTI_Create input.

Operation execution result indication.

None.

Ntsctsf_ASTI_Delete

Authorize the request, delete the 5G access stratum time distribution configuration, deactivate the corresponding 5G access stratum time distribution service.

Time synchronization configuration id.

None.

Operation execution result indication.

None.

Ntsctsf_ASTI_Get

Authorize the request and query the status of the access stratum time distribution.

List of UE identities (GPSI or SUPI).

None.

Operation execution result indication.

Status of the access stratum time distribution (active, optionally with requested time synchronization error budget or inactive).