Wireless technology –Definition
In wireless communication, the information is transmitted and received using the radio waves instead of using wired connections.
The first wireless technology came into existence in the 19th century. After that, the technology has been matured during the intervening years. There are different types of signals that are used for wireless communication, they include:
- Radio frequency transmission
- Infrared Transmission
- Lightwave Transmission
- Microwave transmission
Correspondingly, there are different types of devices using different wireless technologies that allow users to have their connection even in remote areas. Below describes some of these devices.
One of the first wireless communication devices that have been widely used since decades ago is the radio communication. This system is still very popular and provides a variety of services for different applications. Some of such applications include the followings
- Handy radios with multi-channel capabilities for short-range communication.
- Maritime radios and CB (Citizen’s Band) for sailors
- Ham radio communication is used to share the information and act as a communication aid during disasters.
It is another wireless device which modulates the radio links and allowing many users to communicate over a single frequency band. Using the modern 3-G system, the data transmission over cellular systems has become possible with speeds comparable to wired systems.
It is another wireless technology that has extensive applications. In this technology, a communication satellite receives the data coming from the earth station, amplifies via transponders and send them to their destination. Satellite communication also creates a communication link between two positions on the earth. Compared to cellular devices, portable satellite phones are more powerful in broadcasting and reception due to increase in range although they are quite expensive.
It refers to a variety of low-power wireless communication technologies which help users to connect their devices without using any cables.
The Wi-Fi connection is made possible through radio signals, antennas, and routers. In order that a device maintains a Wi-Fi connection, it should have a Wi-Fi card. This technology allows a person to access the web at any place and at any time.
In a Wi-Fi network, signals are transmitted from antenna and routers. When signals are received by Wi-Fi devices through routers, their Wi-Fi cards read the signal and create a web connection between the user and the network. Wi-Fi connections are sometimes free to connect or sometimes secured with passwords for the users. These Wi-Fi technologies are limited in range due to their low power transmission.
Advantages and Disadvantages of Wireless Technology
- Using wireless technology, a network can reach any location that could not be reached through any wired system
- Ease of installation. In wireless technology, we don’t need cables and wires. So users can configure the connection easily
- Users can access their needed information from any place and to any location which in turn results in their more productivity.
- There is a chance of high interference
- Wireless connections are less secured. Unauthorized people can capture signals which are transmitted by air. They can connect and penetrate into a network which is not secured by passwords. So there will be a possibility of hacking the information.
- The speed of the wireless networks is low compared to wired networks. Also, there is always a chance of losing connection when you move away from the router, and this is can pose a big problem in a large network.
- The wireless connection can be obstructed by structures such as walls, ceilings, household items, etc.
Wireless network system components
Basic components of a wireless network include a base station, computer devices and wireless infrastructures.
The common infrastructure that interface wireless communication signals traveling through air to a wired network is the base station. The user can access a wide range of network services through a base station such as web browsing, e-mail, and database application.
Depending upon the situation, a base station may have different names. For a wireless LAN, the access point is a generic base station. In users’ computers, Network Interfacing Controllers (NIC) connect them to their nearest access point which provides an interface to the system within the wireless infrastructure and other user associated with another access point. When a user moves to a location which is close to another access point, its NIC will automatically connect to the other access point for maintaining a reliable communication.
Similar to the Ethernet adapter used in wired networks, wireless networks use wireless adapters to connect the clients to the network. These adapters are available in the various interfaces like PCI, Card Bus, PCMCIA card adapters and USB adapters. These wireless adapters consist of low gain, omnidirectional and rubber duck antennas.
PCI Wireless Adapter
Card bus wireless adapters consist of an internal antenna which is low gain and omnidirectional in nature.
Card Bus Wireless Adapters
Based on various commercially driven equipment, different wireless standards have been developed across the world. Based on the specific application and transmission, these technologies can be classified into four categories.
Tomorrow’s wireless technology
The wireless technology has a foreseeable future for completely changing the means of communication. Without the wireless technology, there is no progress in business, industry, projects and other areas. Considering the progress in wireless technology over the past few decades, its future can be well predicted.
Demand for Increased Communication Speed
Nowadays, there are different ways of sending information from one network type to another. For example, the data can be sent from a satellite network and a free space network to fiber optic cabling with full duplex communication. However, the speed of the communication should also improve. Using the technology 5G Wi-Fi, the data can be sent and received to a wireless customer with a speed of up to 1GB per second.