6.1.5 Notifications

29.5183GPP5G SystemAccess and Mobility Management ServicesRelease 16Stage 3TS

6.1.5.1 General

The notifications provided by the Namf_Communication service are specified in this clause.

Table 6.1.5.1-1: Callback overview

Notification

Resource URI

HTTP method or custom operation

Description

(service operation)

AMF Status Change Notification

{amfStatusUri}

POST

Non UE N2 Information Notification

{n2NotifyCallbackUri}

POST

N1 Message Notification

{n1NotifyCallbackUri}

POST

UE Specific N2 Information Notification

{n2NotifyCallbackUri}

POST

N1N2 Transfer Failure Notification

{ n1n2FailureTxfNotifURI }

POST

6.1.5.2 AMF Status Change Notification

6.1.5.2.1 Description

If a NF service consumer (e.g. SMF) has subscribed to AMF Status Change on Namf_Communication Service, when AMF aware of a change of its own status, AMF shall create a notification including the current state, and shall deliver the notification to the call-back URI, following Subscribe/Notify mechanism defined in 3GPP TS 29.501 [5].

6.1.5.2.2 Notification Definition

Call-back URI: {amfStatusUri}

Call-back URI is provided by NF Service Consumer during creation of the subscription.

6.1.5.2.3 Notification Standard Methods
6.1.5.2.3.1 POST

This method shall support the request data structures specified in table 6.1.5.2.3.1-1 and the response data structures and response codes specified in table 6.1.5.2.3.1-2.

Table 6.1.5.2.3.1-1: Data structures supported by the POST Request Body

Data type

P

Cardinality

Description

AmfStatusChangeNotification

M

1

Representation of the AMF status change notification.

Table 6.1.5.2.3.1-2: Data structures supported by the POST Response Body

Data type

P

Cardinality

Response

codes

Description

n/a

204 No Content

This case represents a successful notification of the AMF status change.

RedirectResponse

O

0..1

307 Temporary Redirect

Temporary redirection. The NF service consumer shall generate a Location header field containing a URI pointing to the endpoint of another NF service consumer to which the notification should be sent.

If an SCP redirects the message to another SCP then the location header field shall contain the same URI or a different URI pointing to the endpoint of the NF service consumer to which the notification should be sent.

RedirectResponse

O

0..1

308 Permanent Redirect

Permanent redirection. The NF service consumer shall generate a Location header field containing a URI pointing to the endpoint of another NF service consumer to which the notification should be sent.

If an SCP redirects the message to another SCP then the location header field shall contain the same URI or a different URI pointing to the endpoint of the NF service consumer to which the notification should be sent.

ProblemDetails

O

0..1

404 Not Found

When context of the notification is not found,the "cause" attribute shall be set to:

– CONTEXT_NOT_FOUND

Table 6.1.5.2.3.1-3: Headers supported by the 307 Response Code on this resource

Name

Data type

P

Cardinality

Description

Location

string

M

1

A URI pointing to the endpoint of the NF service consumer to which the notification should be sent

3gpp-Sbi-Target-Nf-Id

string

O

0..1

Identifier of the target NF (service) instance ID towards which the request is redirected

Table 6.1.5.2.3.1-4: Headers supported by the 308 Response Code on this resource

Name

Data type

P

Cardinality

Description

Location

string

M

1

A URI pointing to the endpoint of the NF service consumer to which the notification should be sent

3gpp-Sbi-Target-Nf-Id

string

O

0..1

Identifier of the target NF (service) instance ID towards which the request is redirected

6.1.5.3 Non UE N2 Information Notification

6.1.5.3.1 Description

This resource represents the callback reference provided by the NF Service Consumer (e.g. LMF, CBCF/PWS-IWF) to receive notifications about N2 information that are not related to a UE.

6.1.5.3.2 Notification Definition

Callback URI: {n2NotifyCallbackUri}

This notification shall support the callback URI variables defined in table 6.1.5.2.2-1.

Table 6.1.5.3.2-1: Callback URI variables for this notification

Name

Definition

n2NotifyCallbackUri

Callback reference provided by the NF Service Consumer during the subscription to this notification.

6.1.5.3.3 Notification Standard Methods
6.1.5.3.3.1 POST

This method sends an N2 information notification to the NF Service Consumer (e.g. LMF, CBCF/PWS-IWF).

This method shall support the request data structures specified in table 6.1.5.3.3.1-2 and the response data structures and response codes specified in table 6.1.5.3.3.1-3.

Table 6.1.5.3.3.1-2: Data structures supported by the POST Request Body

Data type

P

Cardinality

Description

N2InformationNotification

M

1

Representation of the N2 information notification.

Table 6.1.5.3.3.1-3: Data structures supported by the POST Response Body

Data type

P

Cardinality

Response

codes

Description

n/a

204 No Content

This case represents a successful notification of the N2 information to the NF service consumer.

RedirectResponse

O

0..1

307 Temporary Redirect

Temporary redirection. The NF service consumer shall generate a Location header field containing a URI pointing to the endpoint of another NF service consumer to which the notification should be sent.

If an SCP redirects the message to another SCP then the location header field shall contain the same URI or a different URI pointing to the endpoint of the NF service consumer to which the notification should be sent.

RedirectResponse

O

0..1

308 Permanent Redirect

Permanent redirection. The NF service consumer shall generate a Location header field containing a URI pointing to the endpoint of another NF service consumer to which the notification should be sent.

If an SCP redirects the message to another SCP then the location header field shall contain the same URI or a different URI pointing to the endpoint of the NF service consumer to which the notification should be sent.

Table 6.1.5.3.3.1-4: Headers supported by the 307 Response Code on this resource

Name

Data type

P

Cardinality

Description

Location

string

M

1

A URI pointing to the endpoint of the NF service consumer to which the notification should be sent

3gpp-Sbi-Target-Nf-Id

string

O

0..1

Identifier of the target NF (service) instance ID towards which the request is redirected

Table 6.1.5.3.3.1-5: Headers supported by the 308 Response Code on this resource

Name

Data type

P

Cardinality

Description

Location

string

M

1

A URI pointing to the endpoint of the NF service consumer to which the notification should be sent

3gpp-Sbi-Target-Nf-Id

string

O

0..1

Identifier of the target NF (service) instance ID towards which the request is redirected

6.1.5.4 N1 Message Notification

6.1.5.4.1 Description

This resource represents the callback reference provided by the NF Service Consumer (e.g. LMF) to receive notifications about N1 message from the UE (e.g. LPP messages).

6.1.5.4.2 Notification Definition

Callback URI: { n1NotifyCallbackUri }

Callback URI is provided by the NF Service Consumer during the subscription to this notification. . The callback URI for N1 message notification may also be obtained from the NRF, if the NF Service Consumer has registered it in the NF Profile with the NRF.

6.1.5.4.3 Notification Standard Methods
6.1.5.4.3.1 POST

This method sends an N1 message notification to the NF Service Consumer (e.g. LMF).

This method shall support the request data structures specified in table 6.1.5.4.3.1-2 and the response data structures and response codes specified in table 6.1.5.4.3.1-3.

Table 6.1.5.4.3.1-2: Data structures supported by the POST Request Body

Data type

P

Cardinality

Description

N1MessageNotification

M

1

Representation of the N1 message notification.

Table 6.1.5.4.3.1-3: Data structures supported by the POST Response Body

Data type

P

Cardinality

Response

codes

Description

n/a

204 No Content

This case represents a successful notification of the N1 message to the NF service consumer.

RedirectResponse

O

0..1

307 Temporary Redirect

Temporary redirection. The NF service consumer shall generate a Location header field containing a URI pointing to the endpoint of another NF service consumer to which the notification should be sent.

If an SCP redirects the message to another SCP then the location header field shall contain the same URI or a different URI pointing to the endpoint of the NF service consumer to which the notification should be sent.

RedirectResponse

O

0..1

308 Permanent Redirect

Permanent redirection. The NF service consumer shall generate a Location header field containing a URI pointing to the endpoint of another NF service consumer to which the notification should be sent.

If an SCP redirects the message to another SCP then the location header field shall contain the same URI or a different URI pointing to the endpoint of the NF service consumer to which the notification should be sent.

ProblemDetails

O

0..1

403 Forbidden

This case represents, the NF service consumer failing to accept the processing of the notified N1 message. The detailed information shall be provided in the ProblemDetails structure.

Table 6.1.5.4.3.1-4: Headers supported by the 307 Response Code on this resource

Name

Data type

P

Cardinality

Description

Location

string

M

1

A URI pointing to the endpoint of the NF service consumer to which the notification should be sent

3gpp-Sbi-Target-Nf-Id

string

O

0..1

Identifier of the target NF (service) instance ID towards which the request is redirected

Table 6.1.5.4.3.1-5: Headers supported by the 308 Response Code on this resource

Name

Data type

P

Cardinality

Description

Location

string

M

1

A URI pointing to the endpoint of the NF service consumer to which the notification should be sent

3gpp-Sbi-Target-Nf-Id

string

O

0..1

Identifier of the target NF (service) instance ID towards which the request is redirected

6.1.5.5 UE Specific N2 Information Notification

6.1.5.5.1 Description

This resource represents the callback reference provided by the NF Service Consumer (e.g. LMF) to receive notifications about UE specific N2 information.

6.1.5.5.2 Notification Definition

Callback URI: {n2NotifyCallbackUri}

Callback URI is provided by the NF Service Consumer during the subscription to this notification.

6.1.5.5.3 Notification Standard Methods
6.1.5.5.3.1 POST

This method sends an N2 information notification to the NF Service Consumer (e.g. LMF).

This method shall support the request data structures specified in table 6.1.5.5.3.1-2 and the response data structures and response codes specified in table 6.1.5.5.3.1-3.

Table 6.1.5.5.3.1-2: Data structures supported by the POST Request Body

Data type

P

Cardinality

Description

N2InformationNotification

M

1

Representation of the N2 information notification.

Table 6.1.5.5.3.1-3: Data structures supported by the POST Response Body

Data type

P

Cardinality

Response

codes

Description

n/a

204 No Content

This case represents a successful notification of the N2 information to the NF service consumer.

N2InfoNotificationRspData

M

1

200 OK

This case represents a successful notification of the N2 information to the NF service consumer when information needs to be returned in the response.

RedirectResponse

O

0..1

307 Temporary Redirect

Temporary redirection. The NF service consumer shall generate a Location header field containing a URI pointing to the endpoint of another NF service consumer to which the notification should be sent.

If an SCP redirects the message to another SCP then the location header field shall contain the same URI or a different URI pointing to the endpoint of the NF service consumer to which the notification should be sent.

RedirectResponse

O

0..1

308 Permanent Redirect

Permanent redirection. The NF service consumer shall generate a Location header field containing a URI pointing to the endpoint of another NF service consumer to which the notification should be sent.

If an SCP redirects the message to another SCP then the location header field shall contain the same URI or a different URI pointing to the endpoint of the NF service consumer to which the notification should be sent.

Table 6.1.5.5.3.1-4: Headers supported by the 307 Response Code on this resource

Name

Data type

P

Cardinality

Description

Location

string

M

1

A URI pointing to the endpoint of the NF service consumer to which the notification should be sent

3gpp-Sbi-Target-Nf-Id

string

O

0..1

Identifier of the target NF (service) instance ID towards which the request is redirected

Table 6.1.5.5.3.1-5: Headers supported by the 308 Response Code on this resource

Name

Data type

P

Cardinality

Description

Location

string

M

1

A URI pointing to the endpoint of the NF service consumer to which the notification should be sent

3gpp-Sbi-Target-Nf-Id

string

O

0..1

Identifier of the target NF (service) instance ID towards which the request is redirected

6.1.5.6 N1N2 Transfer Failure Notification

6.1.5.6.1 Description

This resource represents the callback reference provided by the NF Service Consumer (e.g. SMF) to receive notifications about failure to deliver N1 / N2 message.

6.1.5.6.2 Notification Definition

Callback URI: {n1n2FailureTxfNotifURI}

Callback URI is provided by the NF Service Consumer during the UE specific N1N2MessageTransfer operation (see clause 6.1.3.5.3.1.

6.1.5.6.3 Notification Standard Methods
6.1.5.6.3.1 POST

This method sends an N1/N2 message transfer failure notification to the NF Service Consumer (e.g. SMF).

This method shall support the request data structures specified in table 6.1.5.6.3.1-1 and the response data structures and response codes specified in table 6.1.5.6.3.1-3.

Table 6.1.5.6.3.1-1: Data structures supported by the POST Request Body

Data type

P

Cardinality

Description

N1N2MsgTxfrFailureNotification

M

1

Representation of the N1/N2 message transfer failure notification.

The "cause" attribute shall be set to one of following cause value s (see clause 6.1.6.3.6):

– UE_NOT_RESPONDING

– UE_NOT_REACHABLE_FOR_SESSION

– TEMPORARY_REJECT_REGISTRATION_ONGOING

– TEMPORARY_REJECT_HANDOVER_ONGOING

Table 6.1.5.6.3.1-2: Data structures supported by the POST Response Body

Data type

P

Cardinality

Response

codes

Description

n/a

204 No Content

This case represents a successful notification of the N1 / N2 message transfer to the NF service consumer.

RedirectResponse

O

0..1

307 Temporary Redirect

Temporary redirection. The NF service consumer shall generate a Location header field containing a URI pointing to the endpoint of another NF service consumer to which the notification should be sent.

If an SCP redirects the message to another SCP then the location header field shall contain the same URI or a different URI pointing to the endpoint of the NF service consumer to which the notification should be sent.

RedirectResponse

O

0..1

308 Permanent Redirect

Permanent redirection. The NF service consumer shall generate a Location header field containing a URI pointing to the endpoint of another NF service consumer to which the notification should be sent.

If an SCP redirects the message to another SCP then the location header field shall contain the same URI or a different URI pointing to the endpoint of the NF service consumer to which the notification should be sent.

Table 6.1.5.6.3.1-3: Headers supported by the 307 Response Code on this resource

Name

Data type

P

Cardinality

Description

Location

string

M

1

A URI pointing to the endpoint of the NF service consumer to which the notification should be sent

3gpp-Sbi-Target-Nf-Id

string

O

0..1

Identifier of the target NF (service) instance ID towards which the request is redirected

Table 6.1.5.6.3.1-4: Headers supported by the 308 Response Code on this resource

Name

Data type

P

Cardinality

Description

Location

string

M

1

A URI pointing to the endpoint of the NF service consumer to which the notification should be sent

3gpp-Sbi-Target-Nf-Id

string

O

0..1

Identifier of the target NF (service) instance ID towards which the request is redirected

6.1.5.7 Void