IEEE 802.1AS timing and synchronization standard
E2824
The IEEE 802.1AS timing and synchronization standard defines precise time synchronization mechanisms for time-sensitive networking over Ethernet, enabling coordinated, low-latency communication in applications such as industrial automation and audio/video transport.
All labels observed (8)
How this entity was disambiguated
This entity first appeared as the object of triple T12956 — 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: IEEE 802.1AS timing and synchronization standard Context triple: [IEEE Standards Association, develops, IEEE 802.1AS timing and synchronization standard]
-
A.
IEEE 1588 Precision Time Protocol standard
The IEEE 1588 Precision Time Protocol standard defines a method for highly accurate time synchronization over packet-based networks, widely used in industrial automation, telecommunications, and power systems.
-
B.
IEEE 802.1Qbv time‑sensitive networking standard
The IEEE 802.1Qbv time‑sensitive networking standard defines enhancements to Ethernet scheduling that enable deterministic, low-latency communication for time-critical applications such as industrial automation and automotive networks.
-
C.
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.
-
D.
IEEE 802.1Q VLAN tagging standard
The IEEE 802.1Q VLAN tagging standard defines how virtual LANs are implemented and identified over Ethernet networks by inserting a VLAN tag into Ethernet frames.
-
E.
IEEE 802.3af Power over Ethernet standard
The IEEE 802.3af Power over Ethernet standard defines a method for delivering electrical power along with data over standard Ethernet cabling to devices such as IP phones, wireless access points, and network cameras.
- 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: IEEE 802.1AS timing and synchronization standard Target entity description: The IEEE 802.1AS timing and synchronization standard defines precise time synchronization mechanisms for time-sensitive networking over Ethernet, enabling coordinated, low-latency communication in applications such as industrial automation and audio/video transport.
-
A.
IEEE 1588 Precision Time Protocol standard
The IEEE 1588 Precision Time Protocol standard defines a method for highly accurate time synchronization over packet-based networks, widely used in industrial automation, telecommunications, and power systems.
-
B.
IEEE 802.1Qbv time‑sensitive networking standard
The IEEE 802.1Qbv time‑sensitive networking standard defines enhancements to Ethernet scheduling that enable deterministic, low-latency communication for time-critical applications such as industrial automation and automotive networks.
-
C.
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.
-
D.
IEEE 802.1Q VLAN tagging standard
The IEEE 802.1Q VLAN tagging standard defines how virtual LANs are implemented and identified over Ethernet networks by inserting a VLAN tag into Ethernet frames.
-
E.
IEEE 802.3af Power over Ethernet standard
The IEEE 802.3af Power over Ethernet standard defines a method for delivering electrical power along with data over standard Ethernet cabling to devices such as IP phones, wireless access points, and network cameras.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
IEEE standard
ⓘ
profile of IEEE 1588 ⓘ time synchronization protocol ⓘ |
| appliesTo |
Time-Sensitive Networking
ⓘ
surface form:
Time-Sensitive Networking (TSN)
bridged local area networks ⓘ |
| basedOn |
IEEE 1588 Precision Time Protocol standard
ⓘ
surface form:
IEEE 1588 Precision Time Protocol
|
| category | Time-Sensitive Networking standard ⓘ |
| defines |
clock state machines
ⓘ
IEEE 802.1AS timing and synchronization standard self-linksurface differs ⓘ
surface form:
generalized Precision Time Protocol (gPTP)
message formats for timing information ⓘ path delay measurement procedures ⓘ precise time synchronization mechanisms for Ethernet networks ⓘ requirements for frequency synchronization ⓘ requirements for phase synchronization ⓘ requirements for syntonization ⓘ synchronization accuracy objectives ⓘ time distribution over full-duplex Ethernet links ⓘ time-aware bridges ⓘ time-aware end stations ⓘ time-aware systems ⓘ |
| enables |
coordinated scheduling of time-sensitive traffic
ⓘ
synchronization of control loops ⓘ synchronization of media streams ⓘ |
| ensures | common notion of time across network nodes ⓘ |
| fullName |
IEEE 802.1AS timing and synchronization standard
self-linksurface differs
ⓘ
surface form:
IEEE Standard for Local and Metropolitan Area Networks – Timing and Synchronization for Time-Sensitive Applications in Bridged Local Area Networks
|
| goal | provide precise and reliable time synchronization over Ethernet ⓘ |
| improves |
end-to-end latency predictability
ⓘ
jitter performance for time-sensitive traffic ⓘ |
| layer | data link layer ⓘ |
| medium |
IEEE 802.3 Ethernet standard
ⓘ
surface form:
Ethernet
|
| organization | Institute of Electrical and Electronics Engineers ⓘ |
| partOf |
IEEE 802.1 standards family
ⓘ
surface form:
IEEE 802.1 family
Time-Sensitive Networking (TSN) standards ⓘ |
| relatedTo |
IEEE 802.1Q VLAN tagging standard
ⓘ
surface form:
IEEE 802.1Q
IEEE 802.1Qav forwarding and queuing for time‑sensitive streams standard ⓘ
surface form:
IEEE 802.1Qav
IEEE 802.1Qbu frame preemption standard ⓘ
surface form:
IEEE 802.1Qbu
IEEE 802.1Qbv time‑sensitive networking standard ⓘ
surface form:
IEEE 802.1Qbv
|
| scope |
local area networks
ⓘ
metropolitan area networks ⓘ |
| standardBody |
IEEE 802 LAN/MAN Standards Committee
ⓘ
surface form:
IEEE 802.1 Working Group
|
| supports |
automotive in-vehicle networks
ⓘ
deterministic communication ⓘ industrial automation ⓘ low-latency communication ⓘ professional audio/video transport ⓘ time-sensitive applications ⓘ |
| uses |
IEEE 1588 Precision Time Protocol standard
ⓘ
surface form:
Best Master Clock Algorithm
master-slave clock hierarchy ⓘ |
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: IEEE 802.1AS timing and synchronization standard Description of subject: The IEEE 802.1AS timing and synchronization standard defines precise time synchronization mechanisms for time-sensitive networking over Ethernet, enabling coordinated, low-latency communication in applications such as industrial automation and audio/video transport.
Referenced by (31)
Full triples — surface form annotated when it differs from this entity's canonical label.
IEEE 802.1Qbv time‑sensitive networking standard
→
typicallyUsedWith
→
IEEE 802.1AS timing and synchronization standard
ⓘ
subject surface form:
IEEE 802.1Qbv
this entity surface form:
IEEE 802.1AS time synchronization standard
IEEE 802.1AS timing and synchronization standard
→
fullName
→
IEEE 802.1AS timing and synchronization standard
self-linksurface differs
ⓘ
subject surface form:
IEEE 802.1AS
this entity surface form:
IEEE Standard for Local and Metropolitan Area Networks – Timing and Synchronization for Time-Sensitive Applications in Bridged Local Area Networks
IEEE 802.1AS timing and synchronization standard
→
defines
→
IEEE 802.1AS timing and synchronization standard
self-linksurface differs
ⓘ
subject surface form:
IEEE 802.1AS
this entity surface form:
generalized Precision Time Protocol (gPTP)
this entity surface form:
IEEE 802.1AS
IEEE 802.1Qat stream reservation protocol standard
→
relatedTo
→
IEEE 802.1AS timing and synchronization standard
ⓘ
subject surface form:
IEEE 802.1Qat
this entity surface form:
IEEE 802.1AS
this entity surface form:
IEEE 802.1AS
IEEE 802.1Qdo TSN for industrial automation standard
→
relatedTo
→
IEEE 802.1AS timing and synchronization standard
ⓘ
subject surface form:
IEEE 802.1Qdo
this entity surface form:
IEEE 802.1AS
IEEE 802.1Qdy TSN for industrial IoT standard
→
relatedTo
→
IEEE 802.1AS timing and synchronization standard
ⓘ
this entity surface form:
IEEE 802.1AS
this entity surface form:
IEEE 802.1AS
this entity surface form:
IEEE 802.1AS
IEEE 802.1CB Frame Replication and Elimination for Reliability
→
relatedTo
→
IEEE 802.1AS timing and synchronization standard
ⓘ
this entity surface form:
IEEE 802.1AS
this entity surface form:
IEEE 802.1AS
this entity surface form:
IEEE 802.1AS
this entity surface form:
IEEE 802.1AS time synchronization
subject surface form:
Stream Reservation Protocol
this entity surface form:
IEEE 802.1AS
this entity surface form:
IEEE 802.1AS
Time-Sensitive Networking (TSN) standards
→
standardIncludes
→
IEEE 802.1AS timing and synchronization standard
ⓘ
subject surface form:
Time-Sensitive Networking
this entity surface form:
IEEE 802.1AS
Time-Sensitive Networking (TSN) standards
→
standardIncludes
→
IEEE 802.1AS timing and synchronization standard
ⓘ
subject surface form:
Time-Sensitive Networking
this entity surface form:
IEEE 802.1AS-Rev
subject surface form:
IEEE 802.1 TSN Task Group
this entity surface form:
IEEE 802.1AS
subject surface form:
IEEE 802.1 TSN Task Group
this entity surface form:
IEEE 802.1AS-Rev
subject surface form:
IEEE 802.1 TSN Task Group
this entity surface form:
IEEE 802.1AS Timing and Synchronization for Time-Sensitive Applications
this entity surface form:
IEEE 802.1AS
this entity surface form:
IEEE 802.1AS
this entity surface form:
IEEE 802.1AS
this entity surface form:
IEEE 802.1AS
this entity surface form:
IEEE 802.1AS
this entity surface form:
IEEE 802.1AS
this entity surface form:
IEEE 802.1AS
this entity surface form:
IEEE 802.1AS
this entity surface form:
IEEE 802.1AS