In the context of this specification, an NF service is offering a capability to authorised consumers.
Network Functions may offer different capabilities and thus, different NF services to distinct consumers. Each of the NF services offered by a Network Function shall be self-contained, reusable and use management schemes independently of other NF services offered by the same Network Function (e.g. for scaling, healing, etc).
The discovery of the NF instance and NF service instance is specified in clause 6.3.1.
System procedures, as specified in TS 23.502 can be built by invocation of a number of NF services. The following Figure shows an illustrative example on how a procedure can be built; it is not expected that system procedures depict the details of the NF Services within each Network Function.
Enables an NF consumer to communicate with the UE and/or the AN through the AMF.
This service enables SMF to request EBI allocation to support interworking with EPS. This service also supports PWS functionality as described in TS 23.041.
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.
This PCF service authorises an AF request and creates policies as requested by the authorised AF for the PDU Session to which the AF session is bound to. This service allows the NF consumer to subscribe/unsubscribe to the notification of Access Type and RAT type, PLMN identifier, access network information, usage report etc.
Provides support for register, deregister and update service to NF, NF services.
Provides NF service consumers and SCP with notifications of newly registered/updated/deregistered NF along with its NF services, SCP.
Also Provides SCP with notifications of newly registered/updated/deregistered SCP.
Enables one NF service consumer or SCP to discover a set of NF instances with specific NF service or a target NF type. Also enables one NF service consumer or SCP to discover a specific NF service. Also enables a SCP to discover a next hop SCP.
Provides the ability to configure the UCMF with dictionary entries consisting of UE manufacturer-assigned UE Radio Capability IDs, the corresponding UE radio capabilities, the corresponding UE Radio Capability for Paging and the (list of) associated IMEI/TAC value(s) via the NEF. The UE radio capabilities the NEF provides for a UE radio Capability ID can be in TS 36.331 format, TS 38.331 format or both formats. Also used for deletion (e.g. as no longer used) or update (e.g. to add or remove a (list of) IMEI/TAC value(s) associated to an entry) of dictionary entries in the UCMF.
Allows NF 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.
There may be both PCF for a PDU Session and PCF for a UE. Each of them may separately and independently register itself at the BSF. Each of them may separately and independently be discovered by a consumer of the BSF.
This service enables an NF to request location determination for a target UE for the Immediate Location Request and to subscribe / get notified of the location determination for a Deferred Location Request. It allow NFs to request or subscribe the current geodetic and optionally civic location of a target UE.
Allows the NF consumer to provision a dictionary entry in the UCMF consisting of a Manufacturer-assigned UE Radio Capability ID, the corresponding UE Radio Capability for Paging and the corresponding UE radio capabilities and the (list of) associated IMEI/TAC value(s). The UE radio capabilities the NEF provides for a UE radio Capability ID can be in TS 36.331 format, TS 38.331 format or both formats. Also used for deletion (e.g. as no longer used) or update (e.g. to add or remove a (list of) IMEI/TAC value(s) associated to an entry) of dictionary entries in the UCMF.
Allows the NF consumer to resolve UE Radio Capability ID (either Manufacturer-assigned or PLMN-assigned) into the corresponding UE radio capabilities and the corresponding UE Radio Capability for Paging. The consumer shall indicate whether it requests a TS 36.331 format or a TS 38.331 format to be provided.
Allows the NF consumer to obtain a PLMN-assigned UE Radio Capability ID for a specific UE radio capabilities. The consumer shall indicate whether the UE radio capabilities sent to UCMF are in TS 36.331 format, TS 38.331, or both.
Allows the NF consumer to subscribe or unsubscribe for notifications of UCMF dictionary entries.
Allows the NF consumer to be notified about creation and deletion of UCMF dictionary entries.
The NSSAAF provides 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.
This service enables the consumer to create, update and delete DNS context in EASDF, or subscribe to DNS message reporting from EASDF.
DNS contexts in EASDF include rules on how EASDF is to handle DNS messages.
rovides support for time synchronization service based on (g)PTP or 5G access stratum time distribution method as described in clause 126.96.36.199. Allows the NF consumer to subscribe for the UE and 5GC capabilities for (g)PTP or 5G access stratum based time synchronization service. Allows the NF consumer to configure the UEs and the 5GC for the (g)PTP based time synchronization service.
Provides support for time synchronization service based on 5G access stratum time distribution method as described in clause 188.8.131.52. Allows the NF consumer to configure the 5GC and RAN for 5G access stratum based time synchronization service for the UEs.