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3GPP Glossaries:  Interfaces / Reference Points
for letter 'N' (5 of 5)

 

Nq

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between  MME
and  RCAF

specified from  Rel-13  in
TS 23.401 – Clause 5.1.1.13
TS 29.405 

The Nq reference point enables the RCAF to retrieve the list of UEs (identified by the IMSIs) served by an eNB or E-UTRAN cell and the list of APNs of the active PDN connections of each IMSI.

 



Nq'

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between  SGSN
and  RCAF

specified from  Rel-13  in
TS 23.060 – Clause 5.6.3.12
TS 29.405 

The Nq' reference point enables the RCAF to retrieve the list of APNs of the active PDN connections of a given UE (identified by the IMSI).

 



Ns   (Diameter)

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between  RCAF
and  SCEF

specified from  Rel-13  in
TS 23.203, clause 5.2.13
TS 23.682, clause 4.3.3.10
TS 29.153 

The Nt reference point is used to report the network status from the RCAF to the SCEF.

Commands:
  • NSR/NSA:  Network-Status-Request/Answer
  • NCR/NCA:  Network-Status-Continuous-Report-Request/Answer
See also  RFC 6733  for Diameter Base Protocol, and  TS 29.230  for 3GPP-specific Diameter codes and identifiers.


5GS–Nsmf

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Service-based interface exhibited by  SMF

specified from  Rel-15  in
TS 23.501, clause 7.2.3
TS 23.502, clause 5.2.8
draft-TS 29.508 

Network Function Services provided by Nsmf:
  • Nsmf_PDUSession
    This service manages the PDU Sessions and uses the policy and charging rules received from the PCF. The service operations exposed by this NF service allows the consumer NFs to handle the PDU Sessions.
  • Nsmf_EventExposure
    This service exposes the events happening on the PDU Sessions to the consumer NFs.


5GS–Nsmsf

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Service-based interface exhibited by  SMSF

specified from  Rel-15  in
TS 23.501, clause 7.2.9
TS 23.502, clause 5.2.9
draft-TS 29.540 

Network Function Services provided by Nsmsf:
  • Nsmsf_SMService
    This service allows AMF to authorize SMS and activate SMS for the served user on SMSF.


Nt   (Diameter)

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between  PCRF
and  SCEF

see it   here

specified from  Rel-13  in
TS 23.203, clause 5.2.13
TS 29.154 

The Nt reference point is used to report the transfer policies from the PCRF to the SCEF.

Commands:
  • BTR/BTA:  Background-Data-Transfer-Request/Answer
See also  RFC 6733  for Diameter Base Protocol, and  TS 29.230  for 3GPP-specific Diameter codes and identifiers.


Nu   (HTTP/JSON)

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between  PFDF
and  SCEF

see it   here

specified from  Rel-14  in
TS 23.203, clause 5.2.15
TS 23.682, clause 4.3.3.11
TS 29.250 

The Nu reference point enables the 3rd party service provider to manage Packet Flow Descriptions (PFDs) in the PFDF.


5GS–Nudm

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Service-based interface exhibited by  UDM

specified from  Rel-15  in
TS 23.501, clause 7.2.5
TS 23.502, clause 5.2.3
draft-TS 29.503 

Network Function Services provided by Nudm:
  • Nudm_UEContextManagement
    • Provide the NF consumer of the information related to UE's transaction information, e.g. UE's serving NF identifier, UE status, etc.
    • Allow the NF consumer to register and deregister its information for the serving UE in the UDM.
    • Allow the NF consumer to update some UE context information in the UDM.
  • Nudm_SubscriberDataManagement
    • Allow NF consumer to retrieve user subscription data when necessary
    • Provide updated user subscriber data to the subscribed NF consumer;
  • Nudm_UEAuthentication
    • Provide updated authentication related subscriber data to the subscribed NF consumer.
  • Nudm_EventExposure
    • Allow NF consumer to subscribe to receive an event.
    • Provide monitoring indication of the event to the subscribed NF consumer.


5GS–Nudr

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Service-based interface exhibited by  UDR

see it   here

specified from  Rel-15  in
TS 23.501, clause 7.2.10
TS 23.502, clause 5.2.12
draft-TS 29.513 

Network Function Services provided by Nudr:
  • Nudr_UnifiedDataManagement
    This service allows NF service consumers to retrieve, create, update, subscribe for change notifications, unsubscribe for change notifications and delete data stored in the UDR, based on the set of data applicable to the consumer. This service may also be used to manage operator specific data.


5GS–Nudsf

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Service-based interface exhibited by  UDSF

see it   here

specified from  Rel-15  in
TS 23.501, clause 4.2.6 

3GPP will specify (possibly by referencing) the N18/Nudsf interface.


5GS–NWu

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between  UE
and  N3IWF

see it   here

specified from  Rel-15  in
TS 23.501, clause 4.2.8.3 

Reference point for establishing secure tunnel(s) between the UE and N3IWF so that control-plane and user-plane exchanged between the UE and the 5G Core Network is transferred securely over untrusted non-3GPP access.



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