When a technician aims an antenna at a remote site, a single bars-style signal reading is not enough to tell whether the link will actually be good, because a strong signal buried in interference can still perform poorly. LTE gives two more precise numbers for this: RSRP, which measures the strength of the reference signal, and RSRQ, which measures its quality relative to everything else on the channel. This guide defines both, explains how they differ from the coarser RSSI, and shows why reading them together is what lets a technician site an antenna for a link that holds up rather than one that merely shows signal.
RSRP and RSRQ in one line: RSRP and RSRQ are two LTE reference-signal metrics. RSRP, reference signal received power, measures the strength of the cell's reference signal in dBm, telling you how much of the specific signal you are receiving. RSRQ, reference signal received quality, measures that signal's quality relative to the total power on the channel, revealing how much interference and load it competes with. Read together they describe both how strong and how clean the link is.
RSRP isolates the strength of the LTE reference signal specifically, rather than lumping together everything the radio hears. LTE cells transmit known reference signals, and RSRP measures the received power of those, expressed in dBm, so it tells you how strongly you are receiving the actual cell you are trying to use. Because it targets the reference signal rather than total noise and signal combined, RSRP is a cleaner indicator of how far you are from the cell and how much of its useful signal is reaching your antenna. More negative dBm values mean a weaker received signal, and RSRP falling toward the cell edge is a warning that the link is stretching thin.
RSRQ answers a different question: not how strong the reference signal is, but how clean it is relative to everything else on the channel. It is a ratio that compares the reference signal power to the total received power on the channel, so it captures the effect of interference and how loaded the cell is. A signal can be reasonably strong yet have poor RSRQ if it is competing with heavy interference or a congested cell, and in that situation the link will perform worse than the raw strength suggests. RSRQ is what exposes that hidden problem.
The reason both exist is that strength and quality can disagree, and each alone can mislead. Good RSRP with poor RSRQ means you are receiving plenty of the signal but it is drowning in interference or contention, so throughput and stability suffer despite the strong reading. Good RSRQ with weak RSRP means the channel is clean but you are simply too far from the cell to get much signal. Only when both are acceptable, a strong enough reference signal that is also clean enough, can you expect a genuinely good link, which is why a technician reads them as a pair rather than trusting either on its own.
RSSI, the received signal strength indicator, is the coarser, older measure and it captures total received power across the channel, everything the radio hears lumped together. That total includes the signal you want, but also interference, noise, and power from other transmissions, so a high RSSI does not by itself tell you that the useful signal is strong; a lot of that power could be interference. RSSI is a blunt instrument: useful for a quick sense of whether there is any signal at all, but unable to separate the wanted signal from the mess around it.
RSRP and RSRQ were designed for LTE precisely to overcome that limitation by focusing on the reference signal. RSRP pulls out the strength of just the wanted reference signal, and RSRQ relates that to the total power, so between them they recover the two things RSSI cannot distinguish: how much of the signal you actually want you are getting, and how much of the total noise-and-interference it has to compete with. In effect, RSRP and RSRQ decompose the situation that RSSI reports as a single ambiguous number into strength and quality, which is far more actionable when diagnosing a link.
This is why antenna siting for LTE relies on the reference-signal metrics rather than RSSI alone. A site could show a respectable RSSI and still deliver a poor connection because much of that received power is interference, which RSRP and RSRQ would reveal immediately as low RSRP or, more tellingly, low RSRQ. Using the coarser measure, a technician might declare a position good and then be puzzled when the link underperforms; using RSRP and RSRQ, the same technician sees whether the position offers both enough of the wanted signal and a clean enough channel before committing the antenna to it.
For a remote SCADA site, the whole point of reading RSRP and RSRQ is to place the antenna where the link will actually be dependable, not just where a bars indicator looks acceptable. A technician moving and aiming an antenna watches both numbers, seeking a position where RSRP is strong enough that the site is comfortably within the cell's usable range and RSRQ is high enough that the signal is not being spoiled by interference or congestion. A spot that satisfies both is far more likely to hold a steady connection than one chosen on strength alone, which is what matters for continuous telemetry.
These metrics also explain and help diagnose problems after installation. A site whose data keeps dropping might show adequate RSRP but poor RSRQ, pointing to interference or a loaded cell rather than distance, which calls for a different remedy, perhaps a different band or a re-aim, than a weak-signal problem would. Distinguishing a strength problem from a quality problem is exactly what the two metrics enable, and it turns troubleshooting from guesswork into a directed response to what the radio is actually experiencing at that location.
For an operator feeding a cloud SCADA platform such as Merobix from many remote gateways, RSRP and RSRQ are the field-level measurements that underpin dependable connectivity site by site. Getting each antenna sited on both strong and clean signal at install time is what keeps telemetry arriving steadily, and having these values available helps interpret a site that is behaving badly: a link that flaps or runs slow can be understood in terms of whether it is short on reference-signal power, short on quality, or both. The platform sees the consequence in the data flow; RSRP and RSRQ explain the cause at the antenna, which is where the connectivity is actually won or lost.
RSRP, reference signal received power, measures the strength of the LTE cell's reference signal in dBm, telling you how much of the wanted signal you are receiving and roughly how far you are from the cell. RSRQ, reference signal received quality, is a ratio comparing that signal to the total power on the channel, revealing how much interference and congestion it competes with. RSRP is about strength; RSRQ is about cleanliness, and a good link needs both.
RSSI reports total received power across the channel, lumping the wanted signal together with interference and noise, so a high RSSI does not guarantee the useful signal is strong. RSRP and RSRQ were designed for LTE to separate those: RSRP isolates the strength of the reference signal, and RSRQ relates it to the total power. That decomposition tells a technician how much wanted signal there is and how clean the channel is, which RSSI alone cannot.
Broadly, a strong RSRP (a dBm value that is not too far toward the very negative end) means the site is comfortably within the cell's usable range, while a good RSRQ means the signal is not being spoiled by interference or congestion. A dependable link needs both to be acceptable together; strong RSRP with poor RSRQ signals interference or a loaded cell, and good RSRQ with weak RSRP signals you are simply too far from the cell.
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