CSMA
E201247
CSMA (Carrier Sense Multiple Access) is a network protocol that helps devices share a communication medium by listening before transmitting to reduce data collisions.
All labels observed (9)
| Label | Occurrences |
|---|---|
| CSMA/CD | 5 |
| CSMA/CA | 3 |
| ALOHA protocol | 1 |
| CSMA canonical | 1 |
| CSMA/CD (theoretical, but practically full-duplex only) | 1 |
| CSMA/CD is not used in full-duplex mode | 1 |
| CSMA/CR | 1 |
| Carrier Sense Multiple Access | 1 |
| Physical Layer Collision Avoidance (PLCA) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1796159 — 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: CSMA Context triple: [CSMA, abbreviation, CSMA]
-
A.
CSMA
CSMA is the Committee on the Status of Minorities in Astronomy, a group within the astronomical community dedicated to promoting equity, inclusion, and the advancement of underrepresented minorities in the field.
-
B.
Time Division Multiple Access
Time Division Multiple Access (TDMA) is a channel access method that divides a communication medium into time slots so multiple users can share the same frequency without interference.
-
C.
IEEE 802.3cd
IEEE 802.3cd is an Ethernet standard that defines higher-speed physical layer specifications, including 50, 100, and 200 Gigabit Ethernet over various media.
-
D.
IEEE 802.2
IEEE 802.2 is a legacy IEEE networking standard that defines the Logical Link Control (LLC) sublayer of the data link layer for local and metropolitan area networks.
-
E.
IEEE 802.5
IEEE 802.5 is a networking standard that defines the token ring local area network (LAN) protocol and its associated physical and data link layer specifications.
- 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: CSMA Target entity description: CSMA (Carrier Sense Multiple Access) is a network protocol that helps devices share a communication medium by listening before transmitting to reduce data collisions.
-
A.
CSMA
CSMA is the Committee on the Status of Minorities in Astronomy, a group within the astronomical community dedicated to promoting equity, inclusion, and the advancement of underrepresented minorities in the field.
-
B.
Time Division Multiple Access
Time Division Multiple Access (TDMA) is a channel access method that divides a communication medium into time slots so multiple users can share the same frequency without interference.
-
C.
IEEE 802.3cd
IEEE 802.3cd is an Ethernet standard that defines higher-speed physical layer specifications, including 50, 100, and 200 Gigabit Ethernet over various media.
-
D.
IEEE 802.2
IEEE 802.2 is a legacy IEEE networking standard that defines the Logical Link Control (LLC) sublayer of the data link layer for local and metropolitan area networks.
-
E.
IEEE 802.5
IEEE 802.5 is a networking standard that defines the token ring local area network (LAN) protocol and its associated physical and data link layer specifications.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
medium access control protocol
ⓘ
network protocol ⓘ |
| accessMethodType | contention-based ⓘ |
| appliesTo |
local area networks
ⓘ
wireless networks (via CSMA/CA) ⓘ |
| assumption |
propagation delay is non-zero
ⓘ
stations can sense carrier on the medium ⓘ |
| backoffBehavior | may wait random time before retransmission ⓘ |
| category | random access protocol ⓘ |
| collisionHandling | collisions may still occur due to propagation delay ⓘ |
| contrastedWith |
TDMA
ⓘ
linked to:
Time Division Multiple Access
token passing ⓘ |
| designGoal | improve channel utilization compared to ALOHA ⓘ |
| feature |
each station senses the channel before transmitting
ⓘ
probabilistic occurrence of collisions ⓘ transmission deferred if channel is busy ⓘ |
| fullName |
Carrier Sense Multiple Access
ⓘ
linked to:
CSMA
|
| hasExtension |
CSMA/CA
ⓘ
linked to:
CSMA
CSMA/CD ⓘ
linked to:
CSMA
|
| hasVariant |
1-persistent CSMA
ⓘ
non-persistent CSMA ⓘ p-persistent CSMA ⓘ |
| influencedBy |
ALOHA protocol
ⓘ
linked to:
CSMA
|
| keyMechanism |
carrier sensing
ⓘ
listen before transmit ⓘ |
| limitation |
cannot completely eliminate collisions
ⓘ
inefficient under very high load ⓘ performance affected by propagation delay ⓘ |
| mediumType | multiaccess channel ⓘ |
| operatesOn |
broadcast channel
ⓘ
shared communication medium ⓘ |
| originField | computer networking ⓘ |
| performanceDependsOn |
network load
ⓘ
propagation time relative to frame time ⓘ |
| predecessorTo |
CSMA/CA
ⓘ
linked to:
CSMA
CSMA/CD ⓘ
linked to:
CSMA
|
| primaryGoal |
coordinate access to a shared medium
ⓘ
reduce data collisions ⓘ |
| relatedTo |
Ethernet
ⓘ
Wi‑Fi ⓘ |
| sensingAction | detects whether the medium is idle or busy ⓘ |
| usedFor | sharing a common transmission channel among multiple stations ⓘ |
| usedInLayer | data link layer ⓘ |
| usedInStandard |
IEEE 802.11 (conceptually via CSMA/CA)
ⓘ
linked to:
IEEE 802.11
IEEE 802.3 ⓘ
linked to:
IEEE 802.3 Ethernet standard
|
| usedInSubLayer | MAC sublayer ⓘ |
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: CSMA Description of subject: CSMA (Carrier Sense Multiple Access) is a network protocol that helps devices share a communication medium by listening before transmitting to reduce data collisions.
Referenced by (15)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: CSMA
linked to: CSMA
linked to: CSMA
linked to: CSMA
linked to: CSMA
linked to: CSMA
linked to: CSMA
linked to: CSMA
linked to: CSMA
linked to: CSMA
linked to: CSMA
linked to: CSMA