The Wireless Internet Technology Computer Science Essay
Wireless Internet gives us a permission to access World Wide Web or Internet email via wireless network. Without using any telephone line or any cable network wireless internet can be used. Not only in a particular place we can use the Internet through wireless Internet even if we are out of the office or home. People have tended to use wireless Internet not only it don’t use wire but also it has easy using for their activities.
When we consider about the wireless technologies, Wi-Fi, Wi-max, Blootooth, 3G and Satellite are examples. When we use these technologies to access Internet these technologies will help us in different ways, and difference technologies embedded in different devices. Some technologies are available in devices in default. And some can be connected. With recent advances in wireless Internet technology , high speed wireless connection are now available on laptops, cell phones ,and other mobile computing devices.
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Wireless Internet is become most important in today. In education, business, exploration, and govern like all this field use the facility of wireless Internet. The world has been become global. Then the information not limited to a particular place, in this situation wireless internet is the tool to link this all things together. Therefore people should not limited for a place like home or office. They must be able to access the internet at any place where they want. Therefore wireless Internet is very important to today’s world. Internet is the most important and valuable topic in today. People use Internet to do their lots of activities.
section{History of Wireless Internet.}
begin{itemize}
item German physicist Heinrich Hertz in his lab designed the primary electromagnetic radio waves in the year 1888.
item In the year 1894 using radio waves in Oxford, England was sent by British physicist Sir Oliver Lodge as the first message.
item Italian inventor Guglielmo Marcon delivered radio waves diagonally the English Channel in the year 1899.
end{itemize}
section{New features of the Wireless ISPs}
However, modern wireless ISPs are able to provide connection speeds ranging anywhere from 384 Kbps to 2.0 Mbps. That is up to 35 times faster than dialup!
One new wireless technology in development as of early 2009 is poised to increase the download speeds of wireless even further. WiMax promises to deliver maximum speeds of up to 7 Mbps — to your laptop, your car, your cell phone, and your home. WiMax is only just now becoming available in some U.S. cities, but expect to see it in more locations by the end of the year and throughout 2010.
Internet is a wide range of subject. Through the internet what we can do is not limited to the send emails and message activities through your mobiles phones. There are number of operations we can do by using the internet. But the technologies we that we use to access the internet is limit the those activities. To download avideo, share a large file, download streaming media, upload some large amount of data, it is better to having a high speed wireless Internet service Provider.
In the present most mobile computers such as laptops comes with the facility to access the internet. It means the devices already have a wireless adapter installed in it. Not only that there are number of computer related devices which can be used to inernet remotely. Those devices have been set up to access the internet in any where the wireless ISP facility have been established. By today there are so many places they provide the facility to access the internet. And most of ISPs give the chance to their customers providing the internet access facility such as 3G, wi-fi in public areas.
section{Requirements for a Wireless Internet Connection:}
When we need to connect a device to the internet wirelessly, there are need some different equipments and facilities than when connecting using wired connection. To access the internet wirelessly it is good to have following things:
begin{itemize}
item Some type of mobile computing device, such as an iPhone, PDA, mini-computer, cell phone, or similar item or a laptop computer .
item An internal wireless adapter or a USB port for connecting an external adapter. the adapter that you use must be compatible with the specific wireless provider you sign up for and the protocols they use. For example, a Wi-Fi 802.11 adapter.
item A high speed, wireless Internet access plan from a provider in your area.
item Free “sniffer” software for locating access at various Hot Spot locations (this software is typically supplied by your wireless Internet service provider).
end{itemize}
It is important to note that wireless home networking and wireless Internet access outside the home or office are two rather different things. Setting up a wireless LAN in your home should not involve a separate service beyond your current DSL or cable provider. They will typically provide you with all the equipment that you need, such as a wireless router, to establish a wireless LAN in your home at no extra cost.
section{WISP – Wireless Internet Service Provider}
Wireless Internet Service Providers provide the public wireless services. There are number of WISPs available in today. In airports, hotels , computer schools and other public business places are covered with the networks using the wireless internet service providers. WISPs are mostly used to create the Local area networks(LAN).
When you use a WISP, you must have the permissions to access it. But some WISPs give the access free. When you use it you must have the clear idea about the security of that WISP. Because there can spread the viruses through that networks. Therefore it will be harmful to your computers. Some WISPs give their service having some contracts, and some time they charge for their service.
chapter{wireless Networks}
section{What is a Wreless Network?}
A wireless network is a kind of network which has interconnections between nodes without using a wire. In this methodology the network is established with the help of electromagnetic waves such as radio waves, LAN connections etc. wireless network is normal same as other network but use the wireless technology to transmit data through the network. There are some advantages uses the wireless network, because the devices within the network can be access within that area at any time anywhere.
section{Types of Wireless Networks}
subsection{Wireless Local Area Networks (WLAN)}
Wireless lan is a wireless local area network which uses radio waves for data transmission between computers of the same network. WLANS allow users in local area such as in a university library get the access to the internet.
subsection{Wireless Personal Area Networks (WPAN)}
Bluetooth and Infra Red technologies are used for wireless personal Network. These technologies will allow the connectivity of personal devices within an area of 30 feet. Infra Red requires a direct line and the range is less as compared to Bluetooth technology.
subsection{Wireless Metropolitan Area Networks (WMAN)}
Wireless man is a Metropolitan area network that connects the computerof various local area networks. It could be within a building in the company.
section{Wireless Wide Area Networks (WWAN)}
WWANs or Wireless Area Networks can be maintained over large areas such as in different cities or between different countries, via multiple satellite systems or antenna sites. The types of system are called 2G systems.
chapter{3G Internet}
Access the internet using the 3G mobile network is meant by 3G Internet. 3G mobile network can be accessed through a mobile device which can be a mobile phone or PDA. Third generation technology is used by 3G internet, which allows users to access larger amount of data with a higher speeds. When comparing the other technologies which are used to access the internet, 3G technology is in a higher position. There are number of devices which provide the facilities to use 3G technology.
section{3G internet vs. regular internet}
To access the 3G internet there are some specific devices that are smaller and more compact than regular desktop and laptop computers. Mostly 3G internet is accessed by the mobile phones. Therefore the accessing internet is depend on the mobile phones’ size and the model. Because the mobile phone has more facilities it is easy to access the web pages to see in their normal sizes. Otherwise the applications interfaces view in smaller size. Mobile networks handle those data, therefore the accessing the internet through the 3G internet is simpler than the regular internet. There are limited download in 3G internet and it depend on the mobile service provider which is selected by you. When we use the wired network to access the internet we can use it within a limited area, but when weuse the 3G internet there has facility to access the intrenet within a wide area which is coverd by the mobile service provider. To acess the 3G internet there only need a mobile phone and the facility to 3G by the service provider.
begin{itemize}
item Speed of 10Mbps at 10 kilometers with line-of-sight with high throughput.
item Easy installation and much faster installation compare to wired networks.
item Full support for WMAN services.
item Single station can serve hundreds of users.
item It is standardized, and same frequency equipments work together.
item Lower consumer premises equipment cost.
item WiMAX is enabling for number of applications in customer and business because of its quality of service.
end{itemize}
section{Is the 3G internet right for you?}
The main thing with the accessing internet through the mobile is the size of the viewing the web pages. Accessing 3G internet is some time not practical with the size of viewing to fulfil our needs through the 3G internet. There are some advantages as well as disadvantages. Some time the web pages which are viewed in the mobile phones or PDA are simple pages and they contain only the valuable details. At that time users don’t need the vaste their time and they can get the information about what they are searched directly and fast. But they can be only less detailed. To watch some video, upload pictures, design tasks they are difficult to do with the 3G internet. But the very important fact is use the 3G internet is available in anywhere the signals available on the selected service providers. Nowadays it is not difficult because the every place covered by the service providers.
section{So who will use 3G internet?}
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There are limited facilities have provided in 3G mobile internet. But it is easy way to access the internet than access the internet through the DSl or cable network. In business, students can use the 3G internet mostly. It would be useful to anyone who has the facility to access the internet anywhere.
chapter{WiMAX }
section{WiMAX: Broadband Wireless Access}
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WiMAX stands for Worldwide Interoperability for Microwave Access.
WiMAX is the IEEE 802.16 standards-based wireless technology that provides MAN (Metropolitan Area Network) broadband connectivity to access the internet. In a WiMAX is an Air Interface for Fixed Broadband Wireless Access Systems, also known as the IEEE WirelessMAN air interface. As far as 30 miles of area can be covered using the WiMAX-based system by transmitting data. So far, WiMAX can be used for homes’ and offices’ communication .
section{Wireless Standards}
There are some wireless standards have been established by the IEEE.
begin{itemize}
item IEEE 802.15, also known as Bluetooth, for the Personal Area Network (PAN);
item IEEE 802.11, also known as WiFi, for the Local Area Network (LAN);
item IEEE 802.16 for the Metropolitan Area Network (MAN),
item IEEE 802.20 for the Wide Area Network (WAN).
end{itemize}
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Normally miles are used to measure the WiMAX range and feet are used for the Wifi range. The main thing is that WiFi is focused on a local-area networking (LAN) technology and that WiMAX is a MAN technology.
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The 802.16d standard of extending 802.16 supports three physical layers . The mandatory PHY mode is 256-point FFT Orthogonal Frequency Division Multiplexing (OFDM). The other two PHY modes are Single Carrier (SC) and 2048 Orthogonal Frequency Division Multiple Access (OFDMA) modes. By the way, the corresponding European standard-the ETSI HiperMAN standard-defines a single PHY mode identical to the 256 OFDM modes in the 802.16d standard.
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A WiMAX system consists of two parts:
begin{itemize}
item A WiMAX tower, similar in concept to a cell-phone tower – A single WiMAX tower can provide coverage to a very large area — as big as 3,000 square miles (~8,000 square km).
item A WiMAX receiver – The receiver and antenna could be a small box or PCMCIA card, or they could be built into a laptop the way WiFi access is today.
end{itemize}
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There are namy advantages included in WiMAX-based solutions, robust security features, good Quality of Service, and mesh and smart antenna technology that will alow better utilization of the resources. WiMAX-based voice service can work on either traditional Time Division Multiplexed (TDM) voice or IP-based Voice, also known as Voice over IP (VoIP).
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WiMAX is similer to WiFi but the WiMAX have higher speed than Wi-Fi and would cover a large area by spreading in a long distance than covering from WI-Fi. Therefore using WiMAX large number of users can access the internet. Use the WiMAX than Wi-Fi is better to get more works.
chapter{Wi-Fi Wireless Internet}
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WiFi stands for “wireless fidelity” and is a popular technology being used by homes, workplaces, mobiles and computer systems world-wide.
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Using radio waves produce the high speed internet services and network connection can be described in the Wi-Fi internet. This technology mostly used in the business places, universities, and offices. Wi-Fi technology can be used in a limited area. Within that area any can access the internet through a device like laptop which has a wireless adapter.
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Wi-Fi works using radio frequency, without using any wired connection between sender and the receiver. When we use the Wi-Fi to a network, automatically create a wireless local area network (WLAN). Wi-Fi provide Fast data transfer rate. With transfer speeds up to 54mb.
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Within the Wi-Fi established area users can move with their computers from one access point to another. The cost for the wired network is can be saved using wireless networks.
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begin{itemize}
item Normally “open” or un-encrypted as a default setting comes with the WiFi (wireless fidelity) networks.
item In order to secure a WiFi, network, connection must distribute with password protected and the device must be configured using a Graphical User Interface or GUI.
item Un-encrypted networks are freely accessible and any data can be accessed through these. Therefore the spreading of viruses can be happen.
end{itemize}
chapter{Other Technologies}
section{Bluetooth}
subsection{What is Bluetooth?}
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Bluetooth is one of wireless technology most used in today in the digital devices. That technology is used to access the internet too. Bluetooth technology is use o communicate between various electronics and that technology has been expanding every day. Mostly used in mobiles phones, personal computers, PDA, Laptops, digital camera, MP3 players and other Bluetooth enabled devices.
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The Bluetooth technology was invented by Ericson in 1994, and after in 1998 that the major mobile phone companies such as Nokia, Ericsson, Intel and Toshiba gathered to promote this technology. Using Bluetooth there can be connected eight devices at a time. Communication can be established hopping channels up to 1600 times per second. Bluetooth wireless technology works by allowing the transmission of signals over short distances between these devices and there by abridge communication and synchronization between these devices.
subsection{How it Works}
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The Bluetooth chip can operate between the frequency band of 2400-2483.5Mhz. Bluetooth is designed to use in area where the wireless communication such as infrared are not working. Between the devices which are use to connect to using the Bluetooth there doesn’t need to have a clear path between them for connecting the devices.
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Bluetooth wireless technology works by allowing the transmission of signals over short distances between these devices and there by abridge communication and synchronization between these devices.
section{GPRS}
GPRS stands for General Packet Radio Service, and is a protocol for passing data over a mobile phone network. And GPRS use to access the internet through the mobile phones. Even though there is no 3G facility, you can access the internet with having the GPRS facility in your phone. Here’s what you need to know about GPRS:
begin{itemize}
item GPRS replaced dial-up mobile phone Internet access, offering faster browsing of Internet content and email. It’s an “always on” service”.
item GPRS on a mobile phone doesn’t use a phone number to connect; it uses something called an APN (Access Point Name).
item For GPRS usage, have to pay for the amount of data you transferred, and not need to pay for your online time per minute.
item GPRS has now been largely superseded by faster data network services known as 3G
end{itemize}
chapter{Conclusion}
To access the internet it is easy to use the wireless technology because it can be used in everywhere the signal are available in internet service providers.
When we select the technology to access the internet we must consider about the speed, cost, availability of signals, suitability of the needs. According to the tasks we wants to fulfil the technology can be different.
When you use the 3G Internet through the mobile phones it is better to consider about the size of viewing.
Bluetooth is mostly use to connect phones with the computers than connecting computer to a computer.
There are various networks in wireless technology which are related to the different places.
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