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Cell

One radio coverage area served by a base-station sector.

Unicom Americas – Mobile Business team

Definitions only — a term explained here is not a service we sell.

A cell is one radio coverage area served by a base station sector on a given frequency. A device attaches to one serving cell and measures its neighbors.

Why it matters

Coverage and capacity are counted per cell, not per site. One site can host several cells, and the cell a device uses changes as it moves or as the network balances load.

Cells and reuse

N = 1

  1. Cell f1
  2. Cell f1
  3. Cell f1
  4. Cell f1
  5. Cell f1
  6. Cell f1
  7. Cell f1
Cells reuse the same frequencies in a pattern; the pattern depends on the deployment, not on the definition of a cell.
Text description

The grid is a schematic. A real deployment mixes sector counts, bands and site heights, so no single reuse factor describes it. The cell remains the unit of coverage and measurement.

What to check

Ask which cell and band a device is on before judging a coverage complaint; the same site can serve a usable cell on one band and a weak one on another. Do not treat a cell ID as a location. The RAN term covers the layer.

FAQ

Is a cell the same as a base station?
No. One base station can serve several cells, for example three sectors on two bands.

Does every cell use a different frequency?
No. Cells reuse frequencies; the pattern is an engineering choice, and modern networks often reuse the same frequency in every cell.

What is a cell ID?
A local identifier for a cell. It is not globally unique and should not be used as a location key without the network context.

Learn more

Sources

  1. 3GPP TS 36.133: Requirements for support of radio resource management (cell measurements)