What is Wireless Communication? Types of Wireless Communication.

What is Wireless Communication ?

You must have heard about this wireless communication at some point or the other. If you do not know about this, then it does not matter if you read this article completely, then you will get complete information about wireless communication. And if you know about wireless communication then this is a very good thing. So, in today's article, we will discuss information about wireless communication.

Introduction Of Wireless Communication :                       

Wireless communication is a method of transmitting information from one point to another, without using any connection like wires, cables, or any physical medium. In the communication system, information is transmitted from transmitter to receiver which is kept at a limited distance. Wireless communication allows the transmitter and receiver to be placed anywhere between a few meters such as a TV remote control to a few thousand kilometers.

Communication can be Wired or Wireless and the medium used for communication is Guided or Unguided. In wired communication, a medium is a physical path such as Co-axial Cables, Twisted Pair Cables Optical Fiber Links, etc., that guide a signal to propagate from one point to another. Such a medium is called a guided medium.

Wireless communication does not require any physical medium, but it propagates the signal through space. Since space only allows for signal transmission without any guidance, the medium used in wireless communication is called an unguided medium.                                             

The term wireless communication was introduced in the 19th century, and wireless communication technology has evolved over the years. It is the most important means of transmitting information from one device to another. In this technology, information can be transmitted through the air without the need for any cables or wires or other electronic conductors, by using electromagnetic waves such as IR, IRF, satellite, etc.                                                            

Wireless communication systems have become an essential part of a variety of wireless communication equipment, allowing the user to communicate even from remotely operated areas. Wireless communication like mobiles. Cordless telephones, Zigbee wireless technology, GPS, Wi-Fi, satellite television, and wireless computer parts| Current wireless phones include 3G and 4G networks, Bluetooth, and Wi-Fi technology.

History of Wireless Communication :

In the year 1897, Guglielmo Marconi successfully demonstrated wireless telegraphy by sending EM Webs (Electromagnetic Webs) for a short distance of 100 meters. This demonstration paved the way for radio communication, the term radio being derived from radiant energy. 

In the early 1900s, trans-Atlantic radio broadcasting was established, where Marconi successfully transmitted messages in Morse code form. Since then, technology related to wireless communication and wireless systems has advanced rapidly and thus enables transmission over greater distances at a lower cost with cheaper devices.             

During the development of wireless communication, many wireless systems and methods were developed, the best examples being telephone communication and television transmission. But the rapid growth of mobile communication began to replace the complex wired telephone system. In this scenario, wired technology became obsolete and was replaced by wireless communication.               

Types of Wireless Communication :             

Bluetooth :    

Bluetooth is another important low-category wireless communication system. It provides data, voice, and audio transmission with a transmission range of 10 meters. Almost all mobile phones, tablets, and laptops are equipped with Bluetooth devices. They can be connected to wireless Bluetooth receivers, audio equipment, cameras, etc.                                 

It is an industrial specification for a personal area network (PAN). This technology is used to exchange information between devices such as phones, laptops, personal computers, printers, digital cameras, mobile phones, etc. without establishing a wire connection.

Bluetooth is a radio standard and communication protocol that is initially implemented in every device. Based on a low-cost transfer microchip, are designed for blue power conjugation with short-range. Bluetooth devices can communicate with each other when they are in range. Bluetooth devices operate in the 2.6 Hz frequency band. This band is also called ISM (Industrial Scientific and Medical) band, this band is freely and globally available.                                                  

In this technology, special attention is also paid to the security of the data, a unique PIN has to be given before the connection is established, after that the holder of the other device gives his consent to join the connection, only then the connection is established.

WiFi :

Wi-Fi is such a network facility through which you can connect to the Internet through any device such as a computer, mobile. Wireless Local Area Network or WLAN (Wi-Fi) is a wireless service related to the Internet. Using WLAN, various devices such as laptops and mobile phones can connect to an access point and access the Internet.              

Wi-Fi is a device for accessing a network and the Internet with the help of radio waves. It works by providing wireless internet to mobile phones around the Wi-Fi access point. 

 The biggest feature of this technology is that its speeds are much faster than those offered by general service providers, which rely on its IEEE (Institute of Electrical and Electronics Engineers) standards which are called 802.11 protocols. Huh. The newest in the series of these protocols is 802.11ag which was released in 2018.              

WiMax :              

WiMAX is a telecommunications technology. Through this technology, one computer will be able to establish contact with another computer without the help of wires. Many countries are currently using this technology. Currently existing 2G and 3G phones cannot avail of this facility. 

This will require a phone that is WiMAX compatible. WiMAX works on both internet and cellular networks. Its speed is 2 Mbps and it remains the same till 10 KM. Its range is more than Wi-Fi. While its range will be 5 to 15 KM for laptops, it will be 50 KM in fixed computer stations.                         

Engineers from several companies such as AT&T, Nokia, and Verizon started working on WiMAX during the 1990s. All the companies wanted to make such technology, whose range was several KM. Intel Corporation advanced Wi-Fi, this technology was brought into existence in 2002. While Wi-Fi has a range of a few meters, WiMAX is a long-range system. 

With the help of this large area can be covered with the help of low towers. It has the facility of GPS, Gaming, and downloading on the Internet. This increases the efficiency of wireless coverage by ten to thirty times. The frequency bandwidth in the spectrum for this service has been auctioned by the government. 

Bharat Sanchar Nigam Limited has started this service for the first time in India from Jaipur. Here a small antenna will be installed in place of the telephone through Wi-Max technology, which will be in contact with the tower. In this way, the internet will be able to run within a radius of 25 km. After this many Indian telecom companies are trying to start this service in Mumbai. Tata Communications is the leader among them.                    

LiFi :                             

Light Fidelity or Li-Fi uses the visible region of the electromagnetic spectrum for communication. It can be easily used in places where Bluetooth, IR, and WiFi are banned, as it uses light instead of radio waves. It was invented in 2011 by Harald Haas, a professor/engineer at the University of Edinburgh.                                        

It is a wireless networking facility just like Wi-Fi. Who is also the CEO of Pure LiFi? One of the major advantages of Li-Fi technology is that it does not obstruct other radio signals like Wi-Fi. Therefore, it can be used in places such as airplanes, where there is a problem of interference with the radio signal.                                       

Mobile Technology :

Mobile technology is the technology used for cellular communication. Mobile computing is becoming more popular through tablet computers. The tablets are on 3G and 4G networks. Mobile technology has different meanings in different aspects, mainly mobile technology in information technology and mobile technology in basketball technology. 

 Integration of information technology-based primarily on wireless technology of wireless devices including laptops, tablets, mobile phones, etc.                                             

Services of mobile technology :                                       

2G (2nd Generation) :

2G refers to the second generation of mobile telephony, which used digital signals for the first time. It was launched in Finland in 1991 and used GSM technology. 2G network came in the form of Semi Global Roaming System, which enabled connectivity all over the world. 2G technology keeps enough security for both the sender and the receiver. 

This digital encryption allows data to be transferred in such a way that only the intended receiver can receive and read it.                    

3G (3rd Generation) :

The first pre-commercial 3G network was launched in Japan by NTT DoCoMo in 1998. The third-generation (3G) of mobile telephony started with the introduction of the new generation and is more advanced technology than the previous generations. 

3G technology adds multimedia features to 2G phones by allowing video, audio, and graphics data to be transmitted over the network. On a 3G phone, you can stream videos or make video calls. 3G is also known as IMT-2000.  

4G (4th Generation) :

The 4G generation of mobiles was launched in 2011. It provides Ultra-Broadband Internet access for mobile devices. High data transfer data rates and even make 4G networks suitable for use in USB wireless modems for Internet access. Its main features are 

5G (5th Generation ) :

5G is the fifth generation of mobile phone cordless (wireless) service. These were the previous 2G, 3G, and 4G generations. The speed of 5G will be at least 4-5 Gbps. After 5G technology, users of the Internet will start getting a high density of data. Better coverage will be available and the battery of mobile devices will also cost less. 

Work on this technology started in May 2013. According to the way 5G is being prepared, it will be able to work on the current LTE network. Most of its features will be able to work on LTE Advanced standards. It is estimated that by the year 2025, one-third of the world's population will get coverage from 5G networks.

IMEI :           

Its full name is International Mobile Equipment Identity. IMEI is a special numerical identification for each mobile device. This number helps to differentiate each device from the other. This is the unique number given to each phone, which is usually behind the mobile battery. 

The IMEI numbers of cellular phones connected to the GSM network are stored in a database (EIR-Equipment Identity Register). This database contains all valid mobile phone devices. A standard IMEI number is a 14 digit string, with an additional 15th test number to verify the entire string. 

There is also a 16-digit variation that contains information about the device's software version, known as the IMEISV.                  

IP Telephony :

Telephony is the technology that allows individuals to communicate with each other over a distance, and IP Telephony is the aspect of communication that allows individuals to communicate with each other over a distance via the Internet. IP Telephony is an increasingly popular form of communication, replacing traditional telephone systems. 

IP phones, sometimes called VOIP telephones, SIP phones, or softphones, are designed for VOIP and are connected to a data network (or broadband router in small businesses) rather than a phone network.

IP Telephony (Internet Protocol Telephony) is a technology that uses packet-switched connections of the Internet Protocol to transmit voice, fax, and other types of information traditionally through dedicated circuit-switches of the public switched telephone network (PSTN). on the connections made. Calls travel as packets of data over shared lines in a reliable flow to the user.                                                                              

Softphone :                                                              

A softphone is computer software that is used to make phone calls over the Internet from any device, including computers, tablets, and mobile devices. A softphone allows users to make telephone calls without a real, physical telephone. 

A softphone is sometimes called a soft client. Most softphone applications work in conjunction with a headset and microphone, using a special VoIP phone or a device called an analog telephone adapter that connects VoIP to a standard telephone handset. Provides calling facility.                                                                           

Voice Mail :           

Voice Mail is a system for sending messages over the phone. In this, the call is answered by a machine that connects to the person to whom a message is to be left. They can listen to their messages later. Voicemail stores voice messages in an electronic form that is then retrieved by recipients. Callers leave short messages which are stored in digital media.


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