Time Division Duplex
E522249
Time Division Duplex is a wireless communication method that uses a single frequency band for both uplink and downlink by separating them in time rather than frequency.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Time Division Duplex canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T5479743 — 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: Time Division Duplex Context triple: [FDD, contrastsWith, Time Division Duplex]
-
A.
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.
-
B.
OFDMA
OFDMA (Orthogonal Frequency Division Multiple Access) is a multi-user version of OFDM that divides subcarriers among multiple users to enable efficient, high-capacity wireless communication in systems like LTE and WiMAX.
-
C.
SC-FDMA
SC-FDMA (Single-Carrier Frequency Division Multiple Access) is a multi-carrier transmission scheme used primarily in LTE uplink that combines single-carrier characteristics with frequency-domain equalization to achieve lower peak-to-average power ratio than OFDM.
-
D.
OFDM
OFDM (Orthogonal Frequency-Division Multiplexing) is a digital multi-carrier modulation technique that splits data across many closely spaced orthogonal subcarriers to improve robustness against interference and multipath fading in wireless and wired communication systems.
-
E.
eXtended Data Rate
eXtended Data Rate (XDR) is a high-performance dynamic random-access memory (DRAM) technology designed to provide very high bandwidth for applications like game consoles, graphics systems, and networking equipment.
- 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: Time Division Duplex Target entity description: Time Division Duplex is a wireless communication method that uses a single frequency band for both uplink and downlink by separating them in time rather than frequency.
-
A.
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.
-
B.
OFDMA
OFDMA (Orthogonal Frequency Division Multiple Access) is a multi-user version of OFDM that divides subcarriers among multiple users to enable efficient, high-capacity wireless communication in systems like LTE and WiMAX.
-
C.
SC-FDMA
SC-FDMA (Single-Carrier Frequency Division Multiple Access) is a multi-carrier transmission scheme used primarily in LTE uplink that combines single-carrier characteristics with frequency-domain equalization to achieve lower peak-to-average power ratio than OFDM.
-
D.
OFDM
OFDM (Orthogonal Frequency-Division Multiplexing) is a digital multi-carrier modulation technique that splits data across many closely spaced orthogonal subcarriers to improve robustness against interference and multipath fading in wireless and wired communication systems.
-
E.
eXtended Data Rate
eXtended Data Rate (XDR) is a high-performance dynamic random-access memory (DRAM) technology designed to provide very high bandwidth for applications like game consoles, graphics systems, and networking equipment.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
duplexing method
ⓘ
wireless communication technique ⓘ |
| abbreviation |
FDD alternative
ⓘ
TDD ⓘ |
| advantage |
better suited for bursty and asymmetric traffic
ⓘ
flexible uplink-downlink ratio ⓘ no need for paired spectrum ⓘ |
| appliesTo |
circuit-switched wireless links
ⓘ
packet-switched networks ⓘ |
| belongsTo | radio resource management techniques ⓘ |
| canCause | cross-link interference if not coordinated ⓘ |
| contrastedWith |
Frequency Division Duplex
ⓘ
Full-duplex same-frequency simultaneous transmission ⓘ Half-duplex operation ⓘ |
| disadvantage |
requires precise timing control
ⓘ
sensitivity to interference between neighboring cells with different frame configurations ⓘ |
| doesNotSeparate | uplink and downlink in frequency ⓘ |
| enables | asymmetric uplink and downlink capacity ⓘ |
| hasComponent |
downlink subframe
ⓘ
special subframe or guard interval ⓘ uplink subframe ⓘ |
| implementedAs | time slots within a frame structure ⓘ |
| mitigates | self-interference by time separation ⓘ |
| optimizedFor |
traffic patterns with higher downlink demand
ⓘ
traffic patterns with higher uplink demand ⓘ |
| relatedConcept |
Time Division Multiple Access
ⓘ
duplexing ⓘ |
| requires |
frame configuration definition
ⓘ
guard period between uplink and downlink slots ⓘ time synchronization between transmitter and receiver ⓘ |
| requiresCoordinationWith | neighboring cells for frame alignment ⓘ |
| separates | uplink and downlink in time ⓘ |
| shares | same carrier frequency for uplink and downlink ⓘ |
| standardizedIn |
3GPP 5G NR specifications
ⓘ
linked to:
3GPP Technical Specifications
3GPP LTE specifications ⓘ
linked to:
3GPP Technical Specifications
|
| supports | dynamic time slot allocation ⓘ |
| usedFor |
backhaul links
ⓘ
fixed wireless access ⓘ mobile broadband services ⓘ |
| usedIn |
4G LTE TDD
ⓘ
5G NR TDD ⓘ WLAN systems ⓘ
linked to:
Wi‑Fi
WiMAX ⓘ
linked to:
IEEE 802.16
cellular networks ⓘ point-to-multipoint microwave systems ⓘ unpaired spectrum bands ⓘ |
| usesResource | single frequency band ⓘ |
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: Time Division Duplex Description of subject: Time Division Duplex is a wireless communication method that uses a single frequency band for both uplink and downlink by separating them in time rather than frequency.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.