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.

Pure Android Smart Phones

"Pure Android" is a term used to describe the Android operating system, meaning the minimum number of applications preinstalled by default. Cell phones for sale in Harare Zimbabwe Smartphone manufacturers fill the memory of their gadgets with programs, some of which are necessary; the other part belongs to the brand owner and / or Google Corporation, or may be the result of some kind of marketing cooperation and, in fact, have every chance to remain unclaimed by the end consumer.

In the overwhelming majority of phones sold today, an impressive number of additional applications are installed that are not mandatory, respectively; do not take into account the individual needs of a particular user. This is not a problem when unnecessary programs can be simply deleted from the gadget's memory; however, the bulk of such applications cannot be deleted, which is the key point. Any mobile phone is equipped with built-in and RAM, and the more programs are stored, the less memory resource, respectively.

What is the advantage of smart phones with pure Android?

When we see the term "pure Android", we need to understand that in this case, the manufacturer deliberately does not overload its new smart phones with a huge number of applications, leaving only the necessary minimum of programs for the user. This approach allows the consumer to make his own choice and download the content he needs. Tecno phones prices in Zimbabwe And, among other things, the problem of load on the device's memory is eliminated, because applications that are not of interest will not load it, leaving free space for personal preferences. The comfort in using the device is evident.

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, are long gone. 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 smart phones.

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. 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 smart phones 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.

Smart phones 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 smart phones with a widescreen display, the Highscreen brand stands out, combining modern characteristics, low price and reliability. Huawei phones prices in Zimbabwe For 2020, the High screen hs-store.ru brand store offers several phone models that have not only an 8-core processor, but also a large capacious battery.

The history of the emergence and development of cellular communications

 A mobile phone is a portable communication device designed primarily for voice communication. Cell phones for sale in Harare Zimbabwe Currently, cellular communication is the most widespread of all types of mobile radio communications, therefore, the most common name for a mobile phone is a cell phone. At the same time, along with cellular telephones, satellite telephones and radiotelephones of trunk communication are also mobile. In 1946, leading experts from AT&T Bell Labs decided to create the world's first portable telephone. Through short scientific research, it was decided to combine an ordinary telephone with a radio transmitter, and use an ordinary radio station to transmit the signal.

At that time, such a telephone hybrid, which later received the name of a radiotelephone, was widely used in cars. The radio station itself was located in the trunk of the car, the tube was carried out into the salon, and the antenna was on the roof. Of course, it was impossible to call the ideal connection quality, constant noises and interference were present on the air. Nevertheless, thanks to their mobility, radiotelephones have gained sufficient popularity. In Russia, the Delta Telecom Company appeared in St. Petersburg on September 9, 1991. The first symbolic call on a cell phone connected to the network was made on September 9, 1991 by the then mayor of St. Petersburg, Anatoly Sobchak. Huawei phones prices in Zimbabwe The handset he called was called Mobira MD59-NB2; it was released by the Finnish company Nokia and weighed about 3 kg.

Mobile phone appearance:

1.      Graphics manipulator button

2.      Call receive button

3.      Phone book

4.      Keyboard

5.      Antenna

6.      Sound speaker

7.      LCD display

8.      On-off key and call rejection

9.      Cancel key

10.  Microphone (located at the bottom)

The benefits of a mobile phone in human life:

Today, the role of a mobile phone in a person's life can hardly be overestimated. With this compact device, we can quickly contact our relatives and friends, work colleagues at any time to find out the information we are interested in. At the same time, there is no need to strain your memory and remember the phone of an old acquaintance who has not been dialed for a long time, the notebook of a mobile phone is always at hand. In addition to contacts, many people store a lot of other information on the phone - they write down their ideas and thoughts, credit card numbers, memorable dates, various files, etc. That is, the phone immediately replaces our address book and flash drive. And all kinds of useful programs, functions, options with which modern cell phones are equipped make this small-sized device so multifunctional that you sometimes wonder.

A positive influence is all the functions of a cellular device that make a person's life easier:

·  Cellular communication allows people to communicate from virtually anywhere in the world. You can always contact the outside world, call your parents, friends.

·      One of the biggest reasons parents usually buy cell phones for their kids is safety. Nowadays and at this age, children very often like to visit friends after school, to play on the street, without thinking that worried parents are waiting for them at home.

We can also use additional functions of the phone:

·       calculator: calculate the solution of examples in mathematics;

·     Internet: in your free time you can go to your favorite sites, check your mail, watch the latest news;

·        music: enjoy your favorite songs;

·    organizer: you can work in a convector, which also helps with calculations in mathematics, physics, transferring one unit of measurement to another, you can also organize your work;

·        alarm clock: never oversleep by starting it; Huawei phones prices in Harare

·   Bluetooth: having such a function on your phone, you can transfer files, letters from a    distance, while absolutely free;

·  calendar: notifying in advance who has a birthday in the coming days, which is very convenient.

 

 

Essay on the topic Mobile phone

The mobile phone is an important invention in the life of mankind. Cell phones for sale in Harare Zimbabwe  Development does not stand still. Now it is hard to surprise someone with new technology, but a few years ago the average person could not even dream of such an invention as a mobile phone. A mobile phone allows you to be always in touch, share the latest news with friends and inform your parents that everything is fine with you. Mobile phones have made our lives easier. Now there is no need to be tied to a certain place if there is a desire to talk to another person. A mobile phone allows you to call anywhere in the world.

Now the mobile phone is not only a means of communication, but also a means of leisure. On a mobile phone, you can play games, watch movies, write a message, use the Internet and communicate on social networks. Now a mobile phone is not a luxury; both a schoolchild and a pensioner have such a device. Each person buys a mobile phone according to his desire, appearance, and the required set of functions. It gives me pleasure to have my own mobile phone, as I am always in touch, I can always have fun when I am bored.

Composition Mobile Phone:

Nowadays almost everyone has mobile phones. Huawei phones prices in Zimbabwe This is very convenient, because they make it possible to talk with relatives and friends at any time, regardless of distance. Earlier, when mobile phones did not exist, it was difficult to get through to a person if he was not at home, but for calls to other cities, people went to the post office and made long-distance calls. Now everything has changed. Mom can call her son and find out how he feels, if everything is all right. You can also always stay in touch with elderly relatives and help them in difficult times. If you are in a hurry and are late, you can always warn about it. With the help of a mobile connection, you can contact anyone in the world in a matter of seconds, and this is a huge advantage of a mobile phone.

But mobile is not devoid of negative features. If a person is driving a car and they call him, he can be distracted and provoke a traffic accident. If you do not pick up the phone in time and do not answer, the person calling you may be offended, saying that no one wants to communicate with him. Often people call out of boredom, as they say, just to chat. We are also so accustomed to our phones that not noticing the beauty around us, we look into it every free moment. Mobile phones also limit real communication between people, which is why people see each other less and prefer to communicate using the phone. People begin to give themselves completely to mobile phones, and life passes them by.

Option number 3

Already today, absolutely every person, both an adult and a child, has a modern cellular connection, since this is a necessary and irreplaceable connection that helps us stay in touch, regardless of the time of day, and location, even being far abroad can be contacted by mobile phone. In the absence of mobile phones, it was rather uncomfortable, since in order to contact your loved ones and relatives you had to walk several kilometers, or even travel by public transport, not a single stop in order to get to the post office and order a conversation with a certain person and city. Samsung phones prices in Zimbabwe Today everything has changed and it has become much easier. Since you can easily get through and find out how you are with your relatives, regardless of their location. And also thanks to the mobile phone, it became possible to inform at any time about the changed future plans.

And to this day, the mobile phone is of great relevance and demand, has become the most common in use and is available to everyone.