Another important metric is the RSRP, this one we actually use to do practical optimisation.
Reference Signal Received Power (RSRP)
The RSRP measures the average received signal power of the reference symbols. In simple terms this value measures how strong the specific signal of your provider for a given frequency band is. This value gives you an indication of how well your router can see the cell tower and a specific cell on a specific frequency. Try to optimize this value to the highest possible. Please note that the value changes completely if your 5G or 4G Band changes. Please note that the values are in decibels and that they are negative so a lower value means a better signal.
Based on our experiences you can categorise the values as below
| dBm | Quality |
| > -80dBm | Excellent |
| < -90dBm | Good |
| < -100dBm | Poor |
| < -120dBm | Critical |
From our experience it is still possible to get a stable connection with an
RSRP > - 110dBm, this however requires a very radio quiet environment and very good antennas.