Network Slice Selection Function
E123464
The Network Slice Selection Function (NSSF) is a 5G core network function that determines and assigns the appropriate network slice for user equipment based on subscription, service requirements, and network policies.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Network Slice Selection Function canonical | 4 |
| Allowed NSSAI | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1077538 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Network Slice Selection Function Context triple: [5G Core, hasComponent, Network Slice Selection Function]
-
A.
5G Core
5G Core is the cloud-native, service-based core network architecture that underpins 5G mobile systems, enabling advanced connectivity, slicing, and low-latency services.
-
B.
IEEE 802.1CM fronthaul standard
The IEEE 802.1CM fronthaul standard is a Time-Sensitive Networking (TSN) specification that defines Ethernet-based transport requirements and profiles for carrying mobile fronthaul traffic in 4G/5G radio access networks.
-
C.
Time-Sensitive Networking
Time-Sensitive Networking is a set of IEEE 802 Ethernet standards that enable deterministic, low-latency, and highly reliable communication for real-time applications such as industrial automation, automotive, and professional audio/video.
-
D.
IEEE 802.1Qdl TSN for fronthaul standard
The IEEE 802.1Qdl TSN for fronthaul standard is a Time-Sensitive Networking specification that defines mechanisms for deterministic, low-latency Ethernet transport in mobile network fronthaul applications.
-
E.
IEEE 802.1Qfi
IEEE 802.1Qfi is an Ethernet networking standard that defines per-stream filtering and policing mechanisms to provide deterministic, time-sensitive traffic handling in bridged networks.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Network Slice Selection Function Target entity description: The Network Slice Selection Function (NSSF) is a 5G core network function that determines and assigns the appropriate network slice for user equipment based on subscription, service requirements, and network policies.
-
A.
5G Core
5G Core is the cloud-native, service-based core network architecture that underpins 5G mobile systems, enabling advanced connectivity, slicing, and low-latency services.
-
B.
IEEE 802.1CM fronthaul standard
The IEEE 802.1CM fronthaul standard is a Time-Sensitive Networking (TSN) specification that defines Ethernet-based transport requirements and profiles for carrying mobile fronthaul traffic in 4G/5G radio access networks.
-
C.
Time-Sensitive Networking
Time-Sensitive Networking is a set of IEEE 802 Ethernet standards that enable deterministic, low-latency, and highly reliable communication for real-time applications such as industrial automation, automotive, and professional audio/video.
-
D.
IEEE 802.1Qdl TSN for fronthaul standard
The IEEE 802.1Qdl TSN for fronthaul standard is a Time-Sensitive Networking specification that defines mechanisms for deterministic, low-latency Ethernet transport in mobile network fronthaul applications.
-
E.
IEEE 802.1Qfi
IEEE 802.1Qfi is an Ethernet networking standard that defines per-stream filtering and policing mechanisms to provide deterministic, time-sensitive traffic handling in bridged networks.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf | 5G core network function ⓘ |
| abbreviation | NSSF ⓘ |
| basedOn |
UE subscription data
ⓘ
network operator configuration ⓘ network policies ⓘ service requirements ⓘ subscriber information ⓘ |
| contributesTo |
QoS assurance per slice
ⓘ
efficient resource utilization ⓘ isolation between network slices ⓘ |
| definedIn |
5G System
ⓘ
surface form:
3GPP 5G System architecture specifications
3GPP TS 23.501 ⓘ 3GPP TS 29-series ⓘ
surface form:
3GPP TS 29.531
|
| deployedBy | 5G network operators ⓘ |
| domain |
5G networks
ⓘ
mobile telecommunications ⓘ |
| ensures | UE is served by suitable network slice ⓘ |
| goal | assign appropriate network slice to user equipment ⓘ |
| hasRole |
network slice assignment
ⓘ
network slice selection ⓘ |
| implements |
operator slice selection policies
ⓘ
subscription-based slice access control ⓘ |
| input |
PLMN information
ⓘ
UE requested NSSAI ⓘ |
| interactsWith |
AMF
ⓘ
Access and Mobility Management Function ⓘ NRF ⓘ Network Repository Function ⓘ PCF ⓘ Policy Control Function ⓘ UDM ⓘ Unified Data Repository ⓘ
surface form:
Unified Data Management
|
| manages |
Network Slice Selection Function
self-linksurface differs
ⓘ
surface form:
Allowed NSSAI
Configured NSSAI ⓘ Rejected NSSAI ⓘ |
| operatesIn | 5G Core network ⓘ |
| output |
AMF set information
ⓘ
selected S-NSSAI list ⓘ |
| partOf | 5G System ⓘ |
| selects |
Network Slice Instance
ⓘ
Network Slice Selection Assistance Information ⓘ network slice ⓘ |
| supports |
home-routed roaming
ⓘ
local breakout roaming ⓘ multi-slice operation ⓘ network slicing ⓘ roaming scenarios ⓘ |
| technologyGeneration |
5G System
ⓘ
surface form:
5G
|
| usesInterface |
Nnssf service-based interface
ⓘ
Nnssf_NSSAIAvailability service ⓘ Nnssf_NSSelection service ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Network Slice Selection Function Description of subject: The Network Slice Selection Function (NSSF) is a 5G core network function that determines and assigns the appropriate network slice for user equipment based on subscription, service requirements, and network policies.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
Network Slice Selection Function
→
manages
→
Network Slice Selection Function
self-linksurface differs
ⓘ
this entity surface form:
Allowed NSSAI