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full Contents for  TS 23.288  Word version:   16.3.0

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7  Nnwdaf Services DescriptionWord-p. 56
7.1  General
The following table illustrates the NWDAF Services.
Service Name
Service Operations
Operation Semantics
Example Consumer(s)

Nnwdaf_AnalyticsSubscription
Subscribe
Subscribe / Notify
PCF, NSSF, AMF, SMF, NEF, AF
Unsubscribe
PCF, NSSF, AMF, SMF, NEF, AF
Notify
PCF, NSSF, AMF, SMF, NEF, AF
Nnwdaf_AnalyticsInfo
Request
Request / Response
PCF, NSSF, AMF, SMF, NEF, AF

The following table shows the analytics information provided by NWDAF service:
Analytics Information
Request Description
Response Description

Slice Load level information
Analytics ID: load level information
Load level of a Network Slice Instance reported either as notification of crossing of a given threshold or as periodic notification (if no threshold is provided).
Observed Service experience information
Analytics ID: Service Experience
Observed Service experience statistics or predictions may be provided for a Network Slice instance 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 instance.
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.
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.
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.

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7.2  Nnwdaf_AnalyticsSubscription ServiceWord-p. 57
7.2.1  General
Service Description:
This service enables the consumer to subscribe/unsubscribe for network data analytics.
When the subscription is accepted by the NWDAF, the consumer NF receives from the NWDAF an identifier (Subscription Correlation ID) allowing to further manage (modify, delete) this subscription. The modification of Analytics subscription can be enforced by NWDAF based on operator policy and configuration.
7.2.2  Nnwdaf_AnalyticsSubscription_Subscribe service operation
Service operation name:
Nnwdaf_AnalyticsSubscription_Subscribe.
Description:
Subscribes to NWDAF analytics with specific parameters.
Inputs, Required:
(Set of) Analytics ID(s) defined in Table 7.1-2, Target of Analytics Reporting, Notification Target Address (+ Notification Correlation ID), Analytics Reporting Parameters, Analytics target period.
NOTE 1:
Target of Analytics Reporting can be provided per individual Analytics ID in a set of Analytics IDs.
Inputs, Optional:
Analytics Filter Information, Subscription Correlation ID (in the case of modification of the analytics subscription), preferred level of accuracy of the analytics.
NOTE 2:
Analytics Filter Information can be provided per individual Analytics ID in a set of Analytics IDs.
Outputs Required:
When the subscription is accepted: Subscription Correlation ID (required for management of this subscription).
Outputs, Optional:
None.
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7.2.3  Nnwdaf_AnalyticsSubscription_Unsubscribe service operationWord-p. 58
Service operation name:
Nnwdaf_AnalyticsSubscription_Unsubscribe.
Description:
unsubscribe to NWDAF analytic.
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
Service operation name:
Nnwdaf_AnalyticsSubscription_Notify.
Description:
NWDAF notifies the consumer instance of the analytics that has subscribed to the specific NWDAF service.
Inputs, Required:
Set of the tuple (Analytics ID, Analytics specific parameters), Notification Correlation Information.
Inputs, Optional:
Timestamp for the analytics information, probability assertion.
NOTE:
Some NWDAF output analytics already include confidence of predictions, which provides the same information as probability assertion.
Outputs, Required:
Operation execution result indication.
Outputs, Optional:
None.
7.3  Nnwdaf_AnalyticsInfo service
7.3.1  General
Service description: this service enables the consumer to request and get from NWDAF network data analytics.
7.3.2  Nnwdaf_AnalyticsInfo_Request service operation
Service operation name:
Nnwdaf_AnalyticsInfo_Request.
Description:
the consumer requests NWDAF operator specific analytics.
Inputs, Required:
(Set of) Analytics ID(s) defined in Table 7.1-2, Target of Analytics Reporting, Analytics target period.
Inputs, Optional:
Analytics Filter Information, preferred level of accuracy of the analytics, time when analytics information is needed.
Outputs, Required:
Set of the tuple (Analytics ID, Analytics specific parameters).
Outputs, Optional:
Timestamp for the analytics information, probability assertion.
NOTE:
Some NWDAF output analytics already include confidence of predictions, which provides the same information as probability assertion.
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A  Change historyWord-p. 60

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