Why is the more developed the mobile communication technology, the worse the cell phone call signal?

Invited to answer questions in this industry.

With the evolution of communication technology, from 2G to the current 5G, the mobile standard is constantly upgrading, but in many places, compared with the original 2G, the current 4G signal and the current 5G signal are getting worse and worse, which is a relative problem, but the emergence of this problem is actually the result of many reasons.

With the development of mobile communication system, the used radio frequency is increasing. Any wireless technology, wireless frequency is the foundation. Wireless frequency is the root of wireless technology in any case. The higher the radio frequency, the worse the diffraction ability and the worse the coverage ability. For the same networking, the higher the wireless frequency, the higher the cost.

As far as operators are concerned, if they have enough bandwidth, they are very willing to use lower wireless frequencies. With the continuous evolution of mobile communication standards, different mobile standards will coexist. Because the low frequency is usually occupied by the early system, when the old system is not completely out of the network, the new system must also use a higher wireless frequency.

The mobile communication standard, 1G, is voice communication. 2G digitization not only meets voice communication, but also begins with narrowband data communication. 3G is the beginning of broadband wireless communication, and data services have become the mainstream, which makes the requirements of mobile communication standards for wireless frequency bandwidth higher and higher, and higher bandwidth also forces operators to use higher standards for networking.

Among the two major mobile systems of 2G, GSM first used 900Mhz radio frequency, and later introduced 1800Mhz, while CDMA used 800Mhz radio frequency in most countries. The coverage effect is better when the wireless frequency is low, which is why many people think that the 2G signal is the best.

In the 4G era, operators have cultivated the wireless frequencies used by 2/3G, but due to the lack of wireless bandwidth in the low-frequency part, the main capacity carrying capacity of operators is still medium and high wireless frequencies such as1800 m/1900 m/2100 m/2300 m/2600 m, and the priority of the low-frequency part is relatively low.

China's 5G, now China Mobile uses 2600Mhz, and China Unicom and China Telecom use 3500Mhz, which is even weaker. However, because operators use NSA networking, 5G users often reflect the signal strength of anchor stations at 1800Mhz, which is relatively stronger than the real signal strength of NR.

The good news is that in the future, 700Mhz of radio and television will be deployed and used by 5G, and the coverage of 700Mhz is very strong, which is the key to breaking the 5G signal.

When the mobile phone enters the smart phone, the communication ability is actually declining. In the 2G era, mobile phones only need to meet the functions of making calls and sending text messages. At that time, mobile phones existed completely in the form of communication terminals, which is now called functional mobile phones.

Smart phones are loaded with a large number of other spare parts because of their many functions, which also makes the communication performance of the terminal partially decline. In fact, even with the same 2G signal, the signal strength of smart phones will be much worse than the original 2G mobile phones, especially in some places where the base station signal is not so strong.

High-rise buildings and urban construction in the city also make the signal in some areas worse. At present, the coverage of most areas, including the indoor part, mainly depends on the outdoor Hong Jizhan.

Hong Jizhan's signal is transmitted through the base station antenna, which involves the problem of antenna hanging high. The height of an ordinary iron tower is between 25 and 55 meters. At present, this 30-meter iron tower is the main tower of the city. Now we have to say that there are more and more high-rise buildings in the city, many buildings are much higher than the hanging height of base station antennas, and the wireless signal congestion in the city is becoming more and more serious.

It turns out that many antennas of urban base stations are on the roofs of state-owned units below the fifth floor. With the continuous advancement of urban construction, demolition has also forced many base stations to relocate. It is much more difficult for operators to choose new stations now than in the 2G era. Many residents think that base station radiation is harmful to health, and some properties are fanning the flames inside. Many residential base stations were forced to move and power off, and a large number of urban base stations had to install beautification antennas with poor coverage, which also led to poor coverage of base stations.

In short, the current 4/5G signal coverage is really not as good as the 2G era. Although the number of 4G base stations exceeds that of 2G base stations, for various reasons, the signal intensity displayed by mobile phones is not as good as the original 2G. 5G uses a higher wireless frequency. If 700Mhz national networking is completed in the future, the effect will be much better.

The communication network is updated quickly. We have experienced the era of 1G, 2G, 3G and 4G networks, and are currently in the primary stage of 5G networks. However, with the development of communication technology, many people find that the cell phone call signal is getting worse with each generation. What is the reason? Communication is no longer a single voice call function, even including pictures, voice, video and other content. Our demand is no longer single, but diversified and all-round combination. This is similar to the continuous improvement of home broadband bandwidth, but everyone always feels that slow network speed has a similar effect. Then, let's take a look at the specific factors that affect the mobile phone call signal!

Let's talk about this problem from a technical point of view. 1G communication network is only used for voice signal transmission, and mobile phone is the communication tool represented by that era. 2G communication network can transmit digital, voice, SMS and other content at the same time. Remember the scene where holiday greeting messages can be seen everywhere? 3G communication network has begun to transmit Internet resources, even including video calling function; With the emergence of 4G communication network, the call function is no longer prominent, but the data transmission service has become more prominent. The 5G communication network will maximize data transmission, and the era of Internet of Everything is about to open!

Although the speed of data transmission is getting faster and faster, it still cannot escape the basic theory of wireless technology. The higher the frequency, the more content can be transmitted per unit time, but the shorter the wireless wavelength, the weaker the penetration performance. This means that covering the same distance, the more developed the communication technology, the more base stations are needed. The increase in the number of required base stations is a great pressure for operators. Although it has entered the communication construction stage of the 5G network, it still cannot guarantee the comprehensive coverage of the 4G network in China.

On the one hand, the construction of 5G base stations has not been rolled out; on the other hand, the retirement of old 2G and 3G base stations leads to the overload of the main 4G base stations in the operator's current network, which affects the quality of mobile phone calls to some extent. Before the 4G base station is connected to VoLTE, voice calls and data services are separated from each other and will not affect each other. Voice calls will use 2G and 3G base stations, and data communication will use 4G base stations. Now both voice and data communication will use 4G base stations. Of course, upgrading technology is always a good thing, but if the traffic carried exceeds the load of 4G base stations, problems will inevitably occur (operators need to constantly optimize and adjust for each network).

The last and more important reason is the increase in user demand. Whether it is voice call or data transmission, the frequency and capacity of users using the network are constantly improving. If the expansion speed of the base station in the communication network can not meet the needs of users, the problem of poor signal or slow communication will inevitably occur.

For the simplest example, let's talk about the clarity of the video transmission picture first! From the original VCD and DVD, it has been upgraded to 1080P, even with Blu-ray quality. The mobile network can't be separated from us, so we can scan the code at any time, take the bus and subway and so on. , will bring some pressure to the communication network resources. China is a vast country, so it is not an easy task to achieve full network coverage.

How to treat the more developed communication technology, the worse the cell phone call signal? Welcome to leave a message to discuss, like a little attention.

There is no denying that communication technology is getting more and more developed, but the cell phone signal is getting worse and worse. There are many reasons for this situation, here is a comprehensive analysis.

Frequency penetration is getting worse. From the early 2G network to the present 5G network, communication technology has undergone many technical upgrades. After upgrading to the 5G network, the Internet access speed of mobile phones is faster, but the communication frequency of mobile phones is higher.

As we all know, the higher the mobile phone frequency, the worse the signal penetration. For a simple example, the coverage radius of a 2G base station is usually around 10 km, while that of a 5G base station is only about 500 meters. Because the penetration of radio frequency is worse, the signal of mobile phone is worse.

The architectural situation in the city is more complicated. No matter which generation of network technology, wireless signals will be affected when they encounter some obstacles. In the early 2G era, the base station tower was higher and the signal coverage was wider. Nowadays, the mobile phone base stations and towers in urban areas are relatively short. The residential areas in many cities are basically 28-story buildings, about 100 meters.

In some economically developed cities, 50-storey office buildings can be seen everywhere. Because the tower height of mobile phone base station is limited, the high-density building area will seriously affect the coverage of mobile phone signals. So even if there is a base station every 1 km in the 4G era, the signal is still very poor, because the buildings in the city affect the signal coverage.

Generally speaking, after the upgrade of communication technology, the penetration of wireless frequency is worse, and buildings in urban areas are denser, which affects the transmission of wireless signals. On the other hand, the mobile phone uses a metal body, which also has a certain impact on signal reception. Many factors are mixed together, resulting in worse and worse cell phone signal.

With the rapid development of society, we have entered the Internet era, and now the 5G network is about to meet us. But now everyone is reacting, feeling that China Mobile's 4G signal is getting worse and worse, and the network is getting slower and slower, especially in toilets or some closed office buildings, so it has been strongly criticized by everyone. So what is the reason?

First of all, because the number of mobile users is the largest, one mobile base station corresponds to 385 users, one Unicom base station corresponds to 323.3 users and one telecom base station corresponds to 224.6 users, so the mobile base station is the most congested, so the signal of mobile 4G network is getting worse and worse, which is largely due to the large number of users and the small number of base stations.

In addition, most of them are unlimited traffic packages now, which means that everyone uses the Internet 24 hours a day. Users don't just browse the web, but watch videos and play games, so the more traffic they use, the more congested the network signal will be.

I'm Lao Jia, and I'm glad to answer your question.

Since the emergence of mobile phones in the 2G era, there has been a trend to replace telephones, and now it has become a reality.

With the continuous improvement of communication network signals, more remote areas have mobile phones.