Many people are perplexed about “Why my cell phone signal is so poor!”
So, what exactly makes an impact on cell phone signal level? Upon the article, you’ll know the story inside.
How cell phone signals are generated
Before figuring out what the signal has to do with anything, it’s important to understand where our cell phone signal is coming from.
The network we are currently using is called a cellular mobile communications network, which is characterized by the division of a large area into a number of small areas, each with a base station that is responsible for the contact and control of user terminals in the area below.
Base stations are composed of many parts, such as antennas, feeders, equipment rooms, RRU, BBU, etc. The one that has the most direct connection with cell phone signals is the antenna.
This easily-ignored white board, contains a number of antenna arrays, and the signal is generated by these antenna arrays through invisible electromagnetic waves that are transmitted to our cell phones.
What does the signal intensity relate to?
After figuring out how cell phone signals are generated, we’ll talk about what does signal intensity relate to.
Signal intensity is mainly related to the following.
- The distance from base station
Once you know the relationship between the signal and the base station, it is easy to understand that the closer you are to the base station, the better the signal will be. However. it is not absolute, and you also need to consider the azimuth and downward slope of the antenna.
- Antenna Azimuth
As mentioned earlier, the closer the base station is, the better the signal will be, but you need to consider both the azimuth and the downward angle of the antenna.
The azimuth is the angle of the antenna, 0° means due north, 90° means due east, 180° means due south, 270° means due west.
A base station has three antennas, and each antenna can cover a 120° area, which is exactly 360° coverage. For example, if the azimuth of the antenna is 0°, the antenna covers an area of 300° to 60°, with 330° to 30° in the main valance direction and the rest in the collateral valance direction.
If you are located in the main direction, the signal is better, but if you are located in the para-essential direction, the signal is weaker.
- Antenna Downward Tilt Angle
The greater the downward angle, the closer the coverage of the base station, and the smaller the angle, the farther the coverage of the base station.
This is a problem due to the presence of the downward tilt angle
If the downward tilt angle is small, which means that the antenna is basically transmitting horizontally, then the signal will be poor when you are close to the base station, which is commonly called “black under the tower”.
- Power Issue
Power mainly includes both the transmitting power of the base station and the receiving power of the cell phone.
The base station’s transmitting power is also easy to understand: the higher the power, the better the coverage and the stronger the signal, and vice versa.
The phone’s reception power mainly indicates our phone’s ability to receive signals, the stronger the reception ability, the better the signal, and vice versa.
That’s why iPhones have been complaining about poor reception in the last two years, due to the poor reception of the baseband board it uses.
Well, after all this, I believe you have already had a deep understanding of cell phone signals, and finally, let’s go through the knowledge related to signals.
Cell Phone Signal Strength Indication
The intensity of a cell phone signal is indicated by a term called RSRP (Received Reference Signal Power), which ranges from -50dbm to -130dbm, with a smaller absolute value indicating a stronger signal.
Generally speaking, if the RSRP value received by the phone is higher than -95dbm, it means that the signal strength is good and can meet some of our usage requirements. If the RSRP is lower than -100dbm, it affects our perception of usage, especially if it is lower than -110dbm, which means that the coverage is very poor, and we call it “weak coverage”, which affects our normal usage, resulting in the inability to make and receive calls and slowing down the Internet.
Poor cell phone reception can have multiple effects
First of all, the worse the signal is, the more reception power the phone needs, just like when a person speaks in a lower voice, then we need to listen more carefully to know what he is saying.
Then the phone actually needs to provide more power for signal reception, which causes the phone to consume more power. So, your phone’s power consumption is faster, not necessarily because you play more, but also because of your poor signal.
At the same time, when the signal is poor, as a cell phone, it is necessary to increase the power of the signal sent in order to let the base station “hear”, at this time on the human body radiation will be greater, on the contrary, if the cell phone signal is good, the power sent out is smaller, the cell phone radiation will be smaller.
These are the stories of cell phone Signal did you get it?