RSRQ value might be used for some scenarios such as cell selection, cell reselection and handover. But, how do we see the RSRQ value as negative in drive-test tools and why do we need RSRQ ? Here the “received signal” is reference signal (RSRP). Reliable data speeds may be attained, but marginal data with drop-outs is possible.Reference Signal Received Quality or with abbreviated version RSRQ is quality of the received signal.

When this value gets close to -100, performance will drop drastically

Reliable data speeds may be attained, but marginal data with drop-outs is possible. You can find more information on RSRP and RSRQ values in the 4G (LTE) section of the Mobile Signal Strength Recommendations page. The RSRQ measurement provides additional information when RSRP is not sufficient to make a reliable handover or cell reselection decision. RSRQ is a C/I type of measurement and it indicates the quality of the received reference signal. RSRQ – 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. A minimum of -20 dB SINR (of the S-Synch channel) is needed to detect RSRP/RSRQ. It is the power of the LTE Reference Signals spread over the full bandwidth and narrowband. RSRP – Reference Signal Received Power is an RSSI type of measurement. In the procedure of handover, the LTE specification provides the flexibility of using RSRP, RSRQ, or both. In cellular networks, when a mobile device moves from cell to cell and performs cell selection/reselection and handover, it has to measure the signal strength/quality of the neighbor cells.

Reference Signals Received Power (RSRP) and Reference Signal Received Quality (RSRQ) are key measures of signal level and quality for modern LTE networks.

Rsrp rsrq