How Cellular Communication Works

Many people think about how cellular networks work, what happens when we press the call button? When calling each other, the called subscriber is often located not only within one city, but even on another continent. (Huawei phones prices in Harare) How does cellular communication work?

PRINCIPLE OF OPERATION OF CELLULAR COMMUNICATIONS

In most of the territory of our country, equipment for cellular communications is located, it is called base stations. They are clearly visible in open areas - in fields, between settlements. In urban areas, they are often placed on the roofs of buildings. The base station is able to pick up a signal from a Smartphone at a distance of up to thirty-five kilometers, contact between the towers is carried out through a special service or voice signal.

The active development of mobile communications gave rise to the problem of limiting the frequency, namely, the working channels located nearby began to overlap, creating interference. For many years, an idea was proposed according to which a certain area of ​​service by a cellular operator must be divided into cells. Each cell is served by a dedicated transmitter that assumes a fixed frequency range and range. This system eliminates interference when using the same frequency, but in a different cell. To divide a certain area into equal sections, the most optimal is a six-cornered figure resembling a honeycomb, since an antenna with a circular pattern installed in the center of the honeycomb will provide free stable access to all points of the cell. All cells have their own frequency band and a serving base station. Adjacent cells do not use the same frequencies, thereby eliminating crosstalk and interference, and conversely, cells that are far apart can use the same frequencies.

HOW BASE STATIONS WORK

When the Smartphone is in standby mode, its receiving mechanism scans the channels of the system. If the user is going to make a call and dials the number, the device automatically finds a station that is located closer to him and sends a request to allocate a voice channel. (Itel phones prices in Zimbabwe) Those base stations that receive the response signal forward its data to the switching center, where the conversation is switched to the nearest station to the called subscriber with a higher signal level. The switching center also determines which mobile operator is being used by the called subscriber.

In the event that a call is made between subscribers within the same network, then in the switching center, the location of the called subscriber is immediately identified, and it does not matter where the person is: at home, in transport or on a business trip in another country. The physical location of the subscriber in no way interferes with the connection and making the call. If the switching center receives information that the called subscriber uses the operator of another communication, then the request will be sent to the switching center of another network. In general, it turns out that the system is quite simple, and how cellular communication works is clear. An interesting question remains how the base station device looks like: everything is simple here - these are just a few metal pedestals.

COMMUNICATION SUSTAINABILITY ISSUES

It is clear that at the moment of dialing the number, the device occupies an unoccupied channel with the maximum possible signal level. But, if during the conversation the subscriber begins to move away from the base station or the conditions for expanding radio waves deteriorate, all this will adversely affect the communication and its quality. It is logical that its improvement occurs after subscribers switch to other, more stable communication channels.

Each base station has an antenna, which consists of several elements, the so-called sectors, which are responsible for their "own" area. The vertical component of the antenna is responsible for communication with mobile devices, the round one - with the controller. Taking into account the fact that one station most often consists of 6 sectors, and each of them is capable of receiving at least 70 calls, after some simple calculations it turns out that serving more than 400 subscribers at the same time is not a problem for it. This performance is often quite enough. But, there are also emergency situations when all subscribers of all mobile operators begin to call. (Samsung phones prices in Zimbabwe) For example, on big holidays (New Year), and the base stations simply cannot cope - interruptions and interference begin. Nevertheless, for an average load, six sectors are more than enough.

 

The difference between a mobile phone and a Smartphone

It is difficult to find a person who has not heard the words: cell phone, communicator, Smartphone, mobile phone.( Huawei phones prices in Harare ) At the same time, for many people there is confusion in defining the difference between these terms. The most popular designation for a device for making calls is a telephone, in turn, if the phone is not a landline, then it is called mobile, because of its autonomous operation and the ability to move, or cellular, which emphasizes its work in a cellular communication system.

The cell / mobile phone came to replace ordinary home phones and made a dizzying breakthrough in people's lives, making dramatic changes in the world development and life of every owner of this gadget. But, technologies have developed rapidly and after a few years the term "operating system" appeared. It was the operating system that made it possible to transform the characteristics of an ordinary mobile phone into a Smartphone, supplementing the capabilities of the first with the functionality of a computer.

Also, there is the term communicator, which was often used in previous years, and which is rarely used at the moment.( Itel P36 pro price in Zimbabwe ) Communicator stands for Pocket PC, supplemented with telephone functionality. And, the word "Smartphone", in its essence, is a valid analogue of the "communicator", which has become entrenched in the lexicon of consumers.

The difference between an ordinary mobile phone and a Smartphone:

mobile phones smart phones Highscreen.Smartphone - translated from English means "smart phone". It is a device supplemented with the characteristics and capabilities of a personal computer. The key difference between a smartphone and a regular mobile phone is the presence of a built-in operating system, which in turn allows the installation of programs and applications via the Internet, expanding the functionality of the gadget, whether it is navigation, instant messengers, Wi-Fi, LTE or a variety of training, information, work and other applications.

Thus, we can call any smartphone a mobile or cell phone, in view of the work with cellular communications, but we cannot call any mobile phone a smartphone, and we can denote such only if it has an operating system on the basis of which the phone is implemented additional functionality.

Typically, simple mobile phones without an OS (operating system) have a standard keypad and do not have a touch screen display. Such devices are still popular, because they support the main function - calls and SMS messages. They are often owned by users who want to have a spare phone, a second phone for work or travel, older people who have chosen simpler technologies for communication. Due to the low cost, this option is often used as a permanent or temporary device, because the device performs the main function of "calling".

The operating system of smart phones has different types and designs, but the most popular of them for many years are: OC Android (Android) and OC IOS (Apple). OC IOS belongs to Apple and is installed exclusively on Apple devices of the same name. OC Android belongs to Google and is the most versatile and widespread system used by manufacturers of mobile devices of various brands. The Android operating system gives the owner endless possibilities: a store with millions of various applications, many of which are free, navigation, ample opportunities when connected to the Internet, voice control and much more. You can find out the difference between Apple Smartphone’s and Android smart phones in our previous article here. (Itel phones prices in Zimbabwe )The High screen brand is a manufacturer of smart phones based on the most popular Android OS. Mobile phones High screen.

Big Screen Smartphones

Inexpensive phones with widescreen displays:

Push-button mobile phones with a monochrome screen, which burst into mass production at the first stage of the development of mobile communications, have long been in the past. Cell phones for sale in Harare Zimbabwe However, quite a few people now use a simple cell phone, more often as a spare or second phone. Why not? These are cheap devices that perform the main task - to call or send SMS. However, back to smartphones.

In the early 2000s, the first touch screen smart phones appeared on the Russian market. The companies NTS, Sony Ericsson, Nokia began selling their first touch devices, and the mobile electronics market began to rapidly develop in this direction. So, subsequently, the Nokia brand released one of the most successful Nokia 5800 on Symbian OS, and the product line of HTC communicators for Android was expecting a real takeoff, like other smart phones running the Android operating system. Tecno phones prices in Zimbabwe At the same time, at the initial stage of popularization, models with 3.5 - 4.5 inch screens were offered, which were well received by buyers.  But, technologies developed and improved, functions and capabilities became more impressive, and technical parameters were impressive, and the area of ​​screens of touch phones began to increase.

But, not only the technical parameters of the gadgets were improved, but also their dimensions, which became more elegant. Thus, the manufacturers of modern smartphones have achieved not only a widescreen display, but also a miniature size, in which most of the new products of 2020 with a 6-inch screen turned out to be approximately the same size in comparison with their previously released 5-inch predecessors.

Smartphones with a large screen quickly gained their popularity due to obvious advantages, which include ease of reading information and using navigation, watching videos and photos, managing Internet pages, comfortable communication on social networks, and much more.

It is not difficult to buy a smartphone with a large screen, because their assortment is absolutely in different price groups, from the cheapest phones to devices of the image class. Among the catalog of functional smartphones with a widescreen display, the Hyscreen brand stands out, combining modern characteristics, low price and reliability. For 2020, the Highscreen hs-store.ru brand store offers several phone models that have not only an 8-core processor, but also a large capacious battery.

How does the fingerprint scanner in a smartphone work?

The fingerprint scanner in smartphones has gained so much popularity that, imperceptibly for consumers, this sensor has moved from the category of "innovation" to an everyday function for everyone, which even inexpensive, budget smartphones are equipped with. In English, this term sounds like: Touch ID or Fingerprint sensor. Its popularization has become relevant due to the combination of the convenience of blocking and the need for additional protection of personal information contained in our smartphones.

If we describe the principle of operation of the fingerprint scanner, it is a technology that can read the papillary pattern of the phalanx of the finger, which is unique for each person. Initially, the work of the sensor is based on scanning; then, the program starts automatically comparing the frame and recognizing it with the previously created user prints, uploaded to the database. If the analysis of individual patterns is successful, the identification will be positive, with access to further use of the smartphone.

Ease of blocking, additional data protection and the difficulty of counterfeiting a personal fingerprint are the strengths of this technology. Huawei phones prices in Zimbabwe Other nuances include the fact that damage to the finger or dirt on the surface of the sensor can cause difficulties when unlocking, as well as the fact that the fingerprint can still be "hacked" if a hacker manages to get a snapshot of your fingerprint.