transmission time interval concept
| Definition | The one-millisecond slot in which a 5G tower schedules a transmission, abbreviated TTI. Chapter 13. |
|---|---|
| Example | A coherence time of 20 milliseconds spans 20 slots. |
| Book | Data Mining as Observation, draft 0.2, commit f3914f0; entry id transmission-time-interval, kind concept. |
| Status | no ledger row names this entry. Corrections: none recorded. |
| Defining equation | Book equation 13.2. |
| Assumptions and scope |
|
| Prior art | none recorded |
| Evidence | lean/DataMiningAsObservation/TTI.lean |
| Reviewed | not yet reviewed; generated 2026-09-10 from records at the commits on the provenance page. |
Equation
Book equation 13.2.
\[\begin{gathered} T_{\mathrm{coh}}=\frac{0.423}{f_D}, \\ \text{refuted fit:}\ \ \phi\approx0.177\,T_{\mathrm{coh}}\ (R^{2}=0.915), \qquad \text{sealed:}\ \ \phi\le 6\ \text{TTI at }10\ \text{Hz},\ \ 1\ \text{TTI at}\ \ge50\ \text{Hz}. \end{gathered}\]
Conditions
- The one-millisecond slot in which a 5G tower schedules a transmission, abbreviated TTI. A duration of m milliseconds spans m slots, slots add over consecutive durations, and a longer duration spans more of them, which is the arithmetic the refresh floors are counted in.
- The sealed floors were 4, 1, and 1 slots at Doppler frequencies of 10, 50, and 400 hertz, and the earlier fit of the floor as a fixed fraction of the coherence time was refuted and is not to be cited.
Conditions are curated in entries.toml rather than read
from a record.
Ledger
none
First stated
Chapter 0 section 0.13 of Data Mining as Observation, with
the program’s sealed floors in
observation-theory-campaigns/experiments/RADIO-FRESHNESS-TRACK.md:20-35.
Measurements
none
Failures and corrections
none
Invariance envelope
none declared
Machine checked
lean/DataMiningAsObservation/TTI.lean,
theorems slots_of_ms, slots_add,
slots_mono, slots_coherence, at
observation-data-mining f3914f0; what the check covers is stated in the
book’s appendix
C.
Used in
Data Mining as Observation chapters 13.
Related
block error rate; coherence time; refresh floor; freshness.
See also
Book equations stated beside the entry’s terms, not defining it: 0.25.
Sources-table rows that share a record with the entry without naming it: chapter 13 section 13.3, chapter 13 section 13.4.
Status
Generated 2026-09-10 by encyclopedia/generate.py; book
at observation-data-mining f3914f0; the commit of every record is listed
in the encyclopedia’s provenance.