SINR

Cellular modules often report RSSI, RSRP, RSRQ, and SINR. Field debugging too often collapses these into “signal bars,” but cellular link quality cannot be judged by one number.

A practical model is:

RSRP: how strong the reference signal is
RSRQ: how good the reference signal quality is
SINR: how clean useful signal is against interference and noise

They answer different questions.

RSRP Indicates Coverage Strength

RSRP is close to reference signal strength at the device. It helps judge weak coverage, antenna placement, enclosure loss, and installation effects.