Whats is Uplink RSSI in LTE

Whats is Uplink RSSI in LTE?

Uplink RSSI is referred as the uplink Received Signal Strength Indicator of the totalwideband received power within the entire channel bandwidth. Having too low or toohigh UL RSSI will contribute to poor quality in the network. Too low RSSI could simplymean the cell is “deaf” and cannot “listen” to any UE. Possible reasons arecomponents failure, incorrect parameter settings, incorrect equipment installation, etc.On the other hand, too high RSSI is equally undesirable. This case is more often seen.Due to the high noise interference, it could likely lead to frequent drop calls, call setupfailure and poor voice quality. Cells with UL RSSI > -90 dBm can be considered ashaving high UL interference.

There are no strict thresholds which would differentiate between quality service and definite KPI degradation, but based on experience and cases that have been investigated it has been established that whenever the UL RSSI for any cell -114 dBm, it get prone to KPI degradation, primarily affects dropped calls.