Introduction

Awais Alam

Topic

Wireless Communication

Wireless communication

Wireless communication is the transfer of information between two or more points that are not connected by an electrical conductor.

Wireless Communication Types

The different types of wireless communication technologies include :• Infrared (IR) wireless communication

• Bluetooth

•Wi-fi

• Radio

• Cell Phone

Infrared (IR) wireless communication

IR wireless communication communicates data or information in devices or systems through infrared (IR) radiation.  Infrared is electromagnetic energy at a wavelength that is longer than that of red light. 

Bluetooth Communication

Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength radio waves in the ISM band from 2.4 to 2.485 GHz) from fixed and mobile devices, building personal area networks (PANs). Invented by telecom vendor Ericsson in 1994, it was originally conceived as a wireless alternative to RS-232 data cables. It can connect several devices, overcoming problems of synchronization.

Wi-fi CommunicationWi-Fi, also spelled Wifi or WiFi, is a popular technology

that allows an electronic device to exchange data or connect to the internet wirelessly using radio waves. The name is a trademark name, and was stated to be a play on the audiophile term Hi-Fi. The Wi-Fi Alliance defines Wi-Fi as any "wireless local area network (WLAN) products that are based on the Institute of Electrical and Electronics Engineers' (IEEE) 802.11 standards".However, since most modern WLANs are based on these standards, the term "Wi-Fi" is used in general English as a synonym for "WLAN". Only Wi-Fi products that complete Wi-Fi Alliance interoperability certification testing successfully may use the "Wi-Fi CERTIFIED" trademark.

Wi-Fi Communication

Radio Communication• Radio is the wireless transmission of signals through free

space by electromagnetic radiation of a frequency significantly below that of visible light, in the radio frequency range, from about 3 kHz to 300 GHz. These waves are called radio waves. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space.

Cell Phone Communication A mobile phone (also known as a cellular phone, cell

phone, and a hand phone) is a device that can make and receive telephone calls over a radio link while moving around a wide geographic area. It does so by connecting to a cellular network provided by a mobile phone operator, allowing access to the public telephone network. By contrast, a cordless telephone is used only within the short range of a single, private base station.

Advantage Of Wireless Communication

Wireless communication has the following advantages:

i.      Communication has enhanced to convey the information quickly to the consumers.

ii.        Working professionals can work and access Internet anywhere and anytime without carrying cables or wires wherever they go. This also helps to complete the work anywhere on time and improves the productivity.

iii.       Doctors, workers and other professionals working in remote areas can be in touch with medical centres through wireless communication.

iv.       Urgent situation can be alerted through wireless communication. The affected regions can be provided help and support with the help of these alerts through wireless communication.

v.         Wireless networks are cheaper to install and maintain.

Disadvantage Of Wireless Communication

The growth of wireless network has enabled us to use personal devices anywhere and anytime. This has helped mankind to improve in every field of life but this has led many threats as well.

 

Wireless network has led to many security threats to mankind. It is very easy for the hackers to grab the wireless signals that are spread in the air. It is very important to secure the wireless network so that the information cannot be exploited by the unauthorized users. This also increases the risk to lose information. Strong security protocols must be created to secure the wireless signals like WPA and WPA2. Another way to secure the wireless network is to have wireless intrusion prevention system.