CEL-FI QUATRA Planning: The difference between off-air and Supercell


In Building Coverage

One of the many flexible features of CEL-FI QUATRA is the different signal source choices. When it comes to planning, a key decision is whether to implement it in off-air mode or tethered to a small cell (Supercell).

The decision is dependent on the size of area you’re covering, the density of users, and the availability and strength of the donor signal.

Here’s a quick look at those options:

Off-air mode: In this scenario the wireless provider’s macro donor signal is delivered over-the-air to the CEL-FI MIMO Panel Antenna that is connected to the CEL-FI QUATRA network unit (NU). The NU then distributes that signal to up to four coverage units (CU) located in areas needing better cellular coverage. This is mainly used for single QUATRA systems covering areas up to 50,000 sq. ft. – and requires a strong enough donor signal from the wireless service provider.

Supercell: This configuration is used in densely populated or larger venues (up to 200,000 sq. ft.) where greater signal capacity is needed and provided by one or more small cells. In a Supercell configuration, up to four CEL-FI QUATRA systems can be tethered to a small cell to provide uniform access to the capacity introduced by the small cell. Supercells are inherently uncomplicated from a planning and deployment point of view, and do not experience coverage interference or performance degradation, two common issues in many multi-small cell installations.


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