Noise is below -110dBm, INterference is above.
A signal is interfered if it is just 12dB above the interferer RxLev.
If it’s less than 12dB above, then interfered
If it’s more than 12dB, it’s clean.
(12dB is a value that works for TCH channels, on the BCCH frequency)
Use 9dB for non BCCH TRX
Use 15dB for GPRS (approx)
Use 20dB for EGPRS (approx)