NEXTIVITY CEL-FI QUATRA EVO - Donor Signal Quality

May 2023 45
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c. Donor Signal Quality
A good donor signal, arriving as cleanly as possible to the NU, is perhaps the most important
consideration in driving the best experiences and outcomes with QUATRA EVO.
With regard to 4G or 5G, there are two metrics of particular importance to monitor and
optimize:
1. RSRP: Reference Signal Receive Power. It is the power of the LTE Reference Signals
spread over the full bandwidth and narrowband. A minimum of -20 dB SINR (of the S-Synch
channel) is needed to detect RSRP/RSRQ.
In the context of CEL-FI QUATRA EVO, the following stratification of quality is recognized:
RSRP Signal Strength
> -90 dBm
Excellent
-90 dBm to -105 dBm
Good
-106 dBm to -120 dBm
Fair
< -120 dBm
Poor
2. SINR: Signal to Noise Ratio. The SINR is the ratio of the usable (desired) signal over the
noise. The following metrics should be used when assessing SINR in the context of CEL-FI
QUATRA EVO.
SINR Value Throughput
>10
Excellent
6 to 10
Good
0 to 5
Fair
< 0
Poor