LTE Explained with Optimization Steps
This article provides an overview of critical cellular metrics (RSSI, RSRP, RSRQ) and actionable steps to optimize a weak connection.
What Affects Cellular Signal?
- Base Station Capacity: High network congestion from too many simultaneous users.
- Proximity: Being too far from the nearest carrier base station.
- Competing Signals: Wireless interference from other networks or nearby electronics.
- Physical Obstructions: Heavy building materials (metal, concrete), trees, and even moving objects like trains.
- Weather Conditions: Rain, snow, and atmospheric changes can temporarily weaken stability.
Key LTE Metrics Explained
To accurately diagnose your signal health, looking past the signal bars from your phone may be neccessary to meet your device's specific quality connection needs. Below are wireless metrics
| Metric | Full Name | Purpose | What to Look For |
|---|---|---|---|
| RSSI | Received Signal Strength Indicator | Measures total received power, including noise and interference. | Higher is better. Above -60 dBm is strong; below -90 dBm is weak. |
| RSRP | Reference Signal Received Power | Measures the specific strength of the LTE reference signal from the tower. | Higher is better. Above -80 dBm is strong; below -110 dBm is weak. |
| RSRQ | Reference Signal Received Quality | Measures the clean, usable quality of the signal, factoring in congestion. | Lower is better. Below -10 dB is good; below -15 dB is poor. |
Signal Health Thresholds
| Health Status | RSSI (dBm) | RSRP (dBm) | RSRQ (dB) | Recommended Action |
|---|---|---|---|---|
| Excellent | > -60 | > -80 | > -5 | Strong, stable connection. No action required. |
| Good | -60 to -70 | -90 to -80 | -10 to -5 | Reliable; minor speed fluctuations may occur. |
| Weak | -70 to -80 | -100 to -90 | -15 to -10 | Unstable. Reposition the router or add an external antenna. |
| Poor | < -80 | < -100 | < -15 | High disconnection risk. Swap LTE bands or use a high-gain antenna. |
| Invalid | N/A | N/A | N/A | No LTE signal. Check your SIM card or WAN source. |
Step-by-Step Troubleshooting to Improve Signal
If your metrics fall into the Weak or Poor categories, implement the following steps to boost your connection:
1. Optimize Device Location
Cellular signals struggle to penetrate walls, especially in basements or deep interior rooms. Move your cellular router or device near a window or install it outdoors for the cleanest line of sight to the tower. There are free tools that can be
2. Clear Physical Obstructions
Ensure that your device antennas are not placed near large metal objects, mirrors, or trapped inside dense equipment enclosures or closets that block wireless radio waves.
3. Minimize Electronic Interference
Keep your cellular equipment isolated from other active electronic devices to reduce competing signal noise, which directly improves your RSRQ (Signal Quality).
4. Upgrade to a High-Gain Antenna
If proximity to the tower is your primary issue, attaching a high-gain external antenna will significantly increase your device's signal reception power (RSRP).