-
RSSI is the Received Signal Strength Indicator: The carrier RSSI measures the average total received power observed only in OFDM symbols containing reference symbols for antenna port 0 (i.e. OFDM symbol 0 and 4 in a slot) in the measurement bandwidth over n resource blocks. The total received power of the carrier RSSI includes the power from co-channel serving and non-serving cells, adjacent channel interference, thermal noise, etc. Total measured over 12-subcarriers including RS from Serving Cell, Traffic in the Serving Cell.
-
RSRQ is the Reference Signal Received Quality: Quality considering also RSSI and the number of used Resource Blocks n, RSRQ = (n × RSRP) ÷ RSSI measured over the same bandwidth. RSRQ is a C/I type of measurement and it indicates the quality of the received reference signal. The RSRQ measurement provides additional information when RSRP is not sufficient to make a reliable handover or cell reselection decision.
-
RSRP is the Reference Signal Received Power: RSRP is a RSSI type of measurement. It is the power of the LTE Reference Signals spread over the full bandwidth and narrow band. A minimum of -20 dB SINR (of the S-Synch channel) is needed to detect RSRP/RSRQ.
-
CINR is the Carrier to Interference and Noise Ratio between the power of the Radio Frequency carrier bearing the useful signal and the total power of interfering signals and thermal noise.
-
SINR is the Signal to Interference plus Noise Ratio. It is commonly used to measure the quality of wireless connections. Typically, the energy of a signal fades with distance. In wireless networks, this is known as path loss. SINR is calculated as SINR = P ÷ (I + N) where P is signal power, I is interference power and N is noise power.