Content for TS 23.288 Word version: 18.4.0

1… 4… 5… 5A… 6… 6.1.3 6.1.4… 6.1.4.4… 6.1.5… 6.1A… 6.1B… 6.1B.2.3… 6.1C 6.2… 6.2.3… 6.2.6… 6.2.6.2 6.2.6.3… 6.2.6.3.3 6.2.6.3.4 6.2.6.3.5 6.2.6.3.6… 6.2.7… 6.2.8… 6.2.9… 6.2.13… 6.2A… 6.2B… 6.2B.3 6.2B.4… 6.2C… 6.2D… 6.2E… 6.2F… 6.3… 6.4… 6.5… 6.6… 6.7… 6.7.3… 6.7.4… 6.7.5… 6.8… 6.9… 6.10… 6.11… 6.12… 6.13… 6.14… 6.16… 6.17… 6.18… 6.19… 6.20… 6.21… 7… 7.4… 7.7… 7.9… 8… 9… 10…

7.1 General 7.2 Nnwdaf_AnalyticsSubscription Service 7.2.1 General 7.2.2 Nnwdaf_AnalyticsSubscription_Subscribe service operation 7.2.3 Nnwdaf_AnalyticsSubscription_Unsubscribe service operation 7.2.4 Nnwdaf_AnalyticsSubscription_Notify service operation 7.2.5 Nnwdaf_AnalyticsSubscription_Transfer service operation 7.3 Nnwdaf_AnalyticsInfo service 7.3.1 General 7.3.2 Nnwdaf_AnalyticsInfo_Request service operation 7.3.3 Nnwdaf_AnalyticsInfo_ContextTransfer service operation
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7 Nnwdaf Services Description p. 275

7.1 General p. 275

Table 7.1-1 illustrates the NWDAF Services.

Table 7.1-1: NF services provided by NWDAF

Service Name	Service Operations	Operation Semantics	Example Consumer(s)
Nnwdaf_AnalyticsSubscription	Subscribe	Subscribe / Notify	PCF, NSSF, AMF, SMF, NEF, AF, OAM, CEF, NWDAF, DCCF, LMF
	Unsubscribe		PCF, NSSF, AMF, SMF, NEF, AF, OAM, CEF, NWDAF, DCCF, LMF
	Notify		PCF, NSSF, AMF, SMF, NEF, AF, OAM, CEF, NWDAF, DCCF, MFAF, LMF
	Transfer	Request / Response	NWDAF
Nnwdaf_AnalyticsInfo	Request	Request / Response	PCF, NSSF, AMF, SMF, NEF, AF, OAM, CEF, NWDAF, DCCF, LMF
Nnwdaf_AnalyticsInfo	ContextTransfer	Request / Response	NWDAF
Nnwdaf_DataManagement	Subscribe	Subscribe / Notify	NWDAF, DCCF
	Notify	Subscribe / Notify	NWDAF, DCCF, MFAFF, ADRF
	Fetch	Request / Response	NWDAF, DCCF, MFAFF, ADRF
Nnwdaf_MLModelProvision	Subscribe	Subscribe / Notify	NWDAF
	Unsubscribe		NWDAF
	Notify		NWDAF
Nnwdaf_MLModelInfo	Request	Request / Response	NWDAF
Nnwdaf_MLModelMonitor	Subscribe	Subscribe / Notify	NWDAF
	Unsubscribe		NWDAF
	Notify		NWDAF
	Register	Request / Response	NWDAF
	Request	Request / Response	NWDAF
Nnwdaf_MLModelTraining	Subscribe	Subscribe / Notify	NWDAF
	Unsubscribe		NWDAF
	Notify		NWDAF
Nnwdaf_MLModelTrainingInfo	Request	Request / Response	NWDAF
Nnwdaf_RoamingAnalytics	Subscribe	Subscribe / Notify	H-RE-NWDAF, V-RE-NWDAF
	Unsubscribe		H-RE-NWDAF, V-RE-NWDAF
	Notify		H-RE-NWDAF, V-RE-NWDAF
	Request	Request / Response	H-RE-NWDAF, V-RE-NWDAF
Nnwdaf_RoamingData	Subscribe	Subscribe / Notify	H-RE-NWDAF, V-RE-NWDAF
	Unsubscribe		H-RE-NWDAF, V-RE-NWDAF
	Notify		H-RE-NWDAF, V-RE-NWDAF
NOTE 1: How OAM consumes Nnwdaf services and which Analytics information is relevant is defined in TS 28.550 Annex H and out of the scope of this TS. NOTE 2: How CEF consumes Nnwdaf services and which Analytics information is relevant is defined in TS 28.201 and out of the scope of this TS. NOTE 3: The Nnwdaf_MLModelProvision service and the Nnwdaf_MLModelInfo service are provided by an NWDAF containing MTLF and consumed by an NWDAF containing AnLF.

Table 7.1-2 shows the analytics information provided by NWDAF service.

Table 7.1-2: Analytics information provided by NWDAF

Analytics Information	Request Description	Response Description
Slice Load level information	Analytics ID: load level information	Load level provided as number of UE registrations and number of PDU sessions for a Network Slice and Network Slice instances as well as resource utilization for Network Slice instances.
Observed Service experience information	Analytics ID: Service Experience	Observed Service experience statistics or predictions may be provided for a Network Slice or an Application. They may be derived from an individual UE, a group of UEs or any UE. For slice service experience, they may be derived from an Application, a set of Applications or all Applications on the Network Slice.
NF Load information	Analytics ID: NF load information	Load statistics or predictions information for specific NF(s).
Network Performance information	Analytics ID: Network Performance	Statistics or predictions on the load in an Area of Interest; in addition, statistics or predictions on the number of UEs that are located in that Area of Interest.
UE mobility information	Analytics ID: UE Mobility	Statistics or predictions on UE mobility. When visited AOI(s) is included in the Analytics Filter information, only statistics on UE mobility can be provided.
UE Communication information	Analytics ID: UE Communication	Statistics or predictions on UE communication.
Expected UE behavioural parameters	Analytics ID: UE Mobility and/or UE Communication	Analytics on UE Mobility and/or UE Communication.
UE Abnormal behaviour information	Analytics ID: Abnormal behaviour	List of observed or expected exceptions, with Exception ID, Exception Level and other information, depending on the observed or expected exceptions.
End-to-end data volume transfer time	Analytics ID: E2E data volume transfer time	Analytics on E2E data volume transfer time.
User Data Congestion information	Analytics ID: User Data Congestion	Statistics or predictions on the user data congestion for transfer over the user plane, for transfer over the control plane, or for both.
QoS Sustainability	Analytics ID: QoS Sustainability	For statistics, the information on the location and the time for the QoS change and the threshold(s) that were crossed; or, for predictions, the information on the location and the time when a potential QoS change may occur and what threshold(s) may be crossed.
Session Management Congestion Control Experience	Analytics ID: Session Management Congestion Control Experience	Statistics on session management congestion control experience for specific DNN and/or S-NSSAI.
Redundant Transmission Experience	Analytics ID: Redundant Transmission Experience	Statistics or predictions aimed at supporting redundant transmission decisions for URLLC services.
WLAN performance	Analytics ID: WLAN performance	Statistics or predictions on WLAN performance of UE.
Dispersion	Analytics ID: UE Dispersion	Statistics or predictions that identify the location (i.e. areas of interest) or network slice(s) where a UE, or a group of UEs disperse their data volume, or disperse mobility or session management transactions or both.
DN Performance	Analytics ID: DN Performance	Statistics or predictions on user plane performance for a specific Edge Computing application.
PFD Determination	Analytics ID: PFD Determination	Statistics on PFD information for a known application identifier(s).
Movement Behaviour	Analytics ID: Movement Behaviour	Statistics or predictions on movement behaviour for an applicable area.
Location Accuracy	Analytics ID: Location Accuracy	Predictions on Location Accuracy.
Relative Proximity	Analytics ID: Relative Proximity	Statistics or predictions on Relative Proximity among UEs.

7.2 Nnwdaf_AnalyticsSubscription Service p. 279

7.2.1 General p. 279

Service Description:

This service enables the consumer to subscribe/unsubscribe for network data analytics and optionally its corresponding analytics accuracy information.

When the subscription for network data analytics and optionally analytics accuracy information is accepted by the NWDAF containing AnLF, the consumer receives from the NWDAF an identifier (Subscription Correlation ID) allowing to further manage (modify, delete) this subscription. The modification of Analytics and optionally analytics accuracy information subscription can be enforced by NWDAF based on operator policy and configuration

This service also enables the consumer to transfer analytics subscriptions to another NWDAF using the Nnwdaf_AnalyticsSubscription_Transfer service operation. Using this service operation, a consumer can request to the NWDAF to prepare for or take over analytics subscription(s), indicating also if and where analytics context is available.

7.2.2 Nnwdaf_AnalyticsSubscription_Subscribe service operation p. 279

Service operation name:

Nnwdaf_AnalyticsSubscription_Subscribe.

Description:

Subscribes to NWDAF analytics and optionally analytics accuracy information with specific parameters.

Inputs, Required:

(Set of) Analytics ID(s) as defined in Table 7.1-2;
Target of Analytics Reporting;
Notification Target Address (+ Notification Correlation ID);
Analytics Reporting Parameters (including Analytics target period, etc.).

Inputs, Optional:

Analytics Filter Information;
Time window for historical analytics;
Subscription Correlation ID (in the case of modification of the analytics subscription);
Preferred level of accuracy of the analytics;
Preferred level of accuracy per analytics subset;
Reporting Thresholds;
Maximum number of objects requested (max);
Preferred order of results;
Maximum number of SUPIs requested (SUPImax);
Time when analytics information is needed;
Analytics Metadata Request;
(Set of) NWDAF identifiers used by the NWDAF service consumer when aggregating multiple analytic subscriptions;
Dataset Statistical Properties;
Output strategy;
Data time window;
Consumer NF's serving area or NF ID;
Information of previous analytics subscription, i.e. NWDAF identifier (i.e. Instance ID or Set ID), Analytics ID(s) (including SUPIs and Analytics Filter Information for UE-related Analytics) and Subscription Correlation ID;
Use case context.
Analytics Accuracy Request information.
Analytics feedback information.

Outputs Required:

When the subscription is accepted: Subscription Correlation ID (required for management of this subscription). When the subscription is not accepted, an error response.

Outputs, Optional:

First corresponding Analytics report is included, if available and if analytics consumer requested immediate reporting (see clause 4.15.1 of TS 23.502)..

7.2.3 Nnwdaf_AnalyticsSubscription_Unsubscribe service operation p. 280

Service operation name:

Nnwdaf_AnalyticsSubscription_Unsubscribe.

Description:

Unsubscribe to NWDAF analytics.

Inputs, Required:

Subscription Correlation ID.

Inputs, Optional:

None.

Outputs, Required:

Operation execution result indication.

Outputs, Optional:

None.

7.2.4 Nnwdaf_AnalyticsSubscription_Notify service operation p. 280

Service operation name:

Nnwdaf_AnalyticsSubscription_Notify.

Description:

NWDAF notifies the consumer instance of the analytics and optionally analytics accuracy information that has subscribed to the specific NWDAF service. See also clause 6.1.3 for contents of the Analytics Exposure.

Inputs, Required:

Notification Correlation Information: this parameter indicates the Notification Correlation ID that has been assigned by the consumer during analytics subscription.

Inputs, Optional:

Set of the tuple (Analytics ID, Analytics specific parameters): this parameter shall be present if output analytics are reported.
Timestamp of analytics generation (required when ADRF is deployed).
Validity period.
Confidence
Revised waiting time.
Analytics Metadata Information.
Analytics Accuracy information.
Stop Analytics Output Consumption indication.
Stop Analytics Output Consumption time window.
Resume Analytics Output Consumption indication.
Termination Request: this parameter indicates that NWDAF requests to terminate the analytics subscription, i.e. NWDAF will not provide further notifications related to this subscription, with cause value (e.g. user consent revoked, NWDAF overload, UE moved out of NWDAF serving area, etc.).
Accuracy Information Termination.

NOTE 1:
Validity period can also be provided as part of Analytics specific parameters for some NWDAF output analytics.
Subscription Change Notification Correlation ID: this parameter shall be present if the notification is for informing the assignment of a new Subscription Correlation Id by the NWDAF. It is set to the old Subscription Correlation ID.
Subscription Correlation ID: this parameter shall be present if the notification is for informing the assignment of a new Subscription Correlation Id by the NWDAF. It is set to a new Subscription Correlation ID assigned by the NWDAF.

Outputs, Required:

Operation execution result indication.

Outputs, Optional:

None.

7.2.5 Nnwdaf_AnalyticsSubscription_Transfer service operation |R17| p. 281

Service operation name:

Nnwdaf_AnalyticsSubscription_Transfer.

Description:

Requests to NWDAF for transferring analytics subscription(s) from the consumer NWDAF.

Inputs, Required:

Transfer type: indicates the type of the transfer request. The following values are supported:
- Analytics subscription transfer preparation: requests the NWDAF to prepare for taking over the analytics subscription(s) and/or prepare for collecting Analytics Context(s).
- Analytics subscription transfer: requests the NWDAF to take over the analytics subscription(s).
- Analytics subscription transfer cancel: cancels a prepared analytics subscription request.

Inputs, Optional:

If this service operation is for "analytics subscription transfer preparation", the following parameter shall be provided:
- (Set of) analytics subscription information with the following parameters:
  - All input parameters for the analytics exposure as specified in clause 6.1.3.
  - [OPTIONAL] Active data source ID(s): Instance ID or Set ID of the active data source(s) the consumer NWDAF is currently using for the analytics of this analytics subscription.
  - [OPTIONAL] ML Model related information, i.e. information related to the ML model(s) that the NWDAF is currently using for the analytics:
    - ID(s) of NWDAF(s) containing MTLF: Instance ID(s) of the NWDAF(s) containing MTLF from which the consumer NWDAF currently subscribes to the ML model information used for the analytics.
    - [OPTIONAL] File address of the ML model(s).
  - ID of the analytics consumer, e.g. NF, AF or OAM, that is subscribed to receive analytics.
  - [OPTIONAL] (Set of) analytics context identifier(s): identifies analytics context available at the consumer NWDAF as defined in clause 6.1B.4.
If this service operation is to request analytics subscriptions transfer and if analytics subscription transfer preparation is not performed, the same parameters as those for transfer type "Analytics subscription transfer preparation" shall be provided.
If this service operation is to request analytics subscriptions transfer and if analytics subscription transfer preparation is performed, the same parameters as those for transfer type "Analytics subscription transfer preparation" can be provided with updated parameter values.
If this service operation is to request analytics subscriptions transfer cancel, the following parameter shall be provided:
- Subscription Correlation ID.

Outputs Required:

Operation execution result indication.

Outputs, Optional:

None.

7.3 Nnwdaf_AnalyticsInfo service p. 282

7.3.1 General p. 282

Service description:

this service enables the consumer to request and get from NWDAF network data analytics, analytics accuracy information or enables NWDAF to request transfer of analytics context from another NWDAF.

7.3.2 Nnwdaf_AnalyticsInfo_Request service operation p. 282

Service operation name:

Nnwdaf_AnalyticsInfo_Request.

Description:

The consumer requests NWDAF operator specific analytics and optionally analytics accuracy information.

Inputs, Required:

(Set of) Analytics ID(s) as defined in Table 7.1-2, Target of Analytics Reporting, Analytics Reporting Parameters (including Analytics target period, etc.

Inputs, Optional:

Analytics Filter Information, preferred level of accuracy of the analytics, preferred level of accuracy per analytics subset, time when analytics information is needed, maximum number of objects requested (max), preferred order of results, maximum number of SUPIs requested (SUPImax), Analytics Metadata Request, Dataset Statistical Properties, Output strategy, Data time window, Use case context, Time window for historical analytics and Analytics Accuracy Request information.

Outputs, Required:

If the request is accepted, then set of the tuple (Analytics ID, Analytics specific parameters). When the request is not accepted, an error response.

Outputs, Optional:

Timestamp of analytics generation (required when ADRF is deployed), validity period, confidence, revised waiting time, Analytics Metadata Information, Analytics Accuracy information. See clause 6.1.3.

7.3.3 Nnwdaf_AnalyticsInfo_ContextTransfer service operation |R17| p. 283

Service operation name:

Nnwdaf_AnalyticsInfo_ContextTransfer.

Description:

Requests to NWDAF to transfer context information related to analytics subscriptions.

Inputs, Required:

(Set of) Analytics context identifier(s).

Inputs, Optional:

Requested Analytics Context per analytics context identifier.

Outputs Required:

(Set of) Analytics Context as specified in clause 6.1B.4.

Outputs, Optional:

ADRF ID with Analytics Context Type stored in the ADRF (i.e. Historical output Analytics and/or Data related to Analytics).