Research On One Way Satellite Internet Providers Computer Science Essay

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As Internet continued to grow, the number of satellites in orbit continued to increase and researchers began working on ways to transmit data across wireless communication. These efforts came to succeed in 1973, when researchers successfully linked two European computers to an American network by way of satellite communication services. As the technology grew more and more data found its way across satellite connections until 1996, the first consumer satellite Internet service went into service. In 1996, a service known as DirecPC (now it's called as HughesNet) launched in an effort to expand the reach of Internet access. Technology has continued to advance since that time, with satellite connections now operating in both one-way and two-way communication modes providing service to almost every continent. Satellite Internet access is an eye-catching option for web users who live in remote locations or who otherwise have no direct connection to an Internet Service Provider.

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A satellite Internet connection is an arrangement in which the outgoing and the incoming data are sent from and arrive at a computer through a satellite. The service can be provided to subscriber's world-wide through LEO (Low Earth Orbit) satellites. Geostationary satellites can offer higher data speeds, but their signals cannot reach some polar regions of the world. Different types of satellite systems have a wide range of different features and technical limitations, which can greatly affect their usefulness and performance in specific applications. Each subscriber's hardware includes a satellite dish antenna and a transceiver that functions in the microwave portion of the radio spectrum. By beaming an Internet feed from an orbiting satellite directly to the subscriber, satellite Internet providers have been spreading the reach of the Internet for over a decade. Until recently, satellite Internet connection was one-way and required a dial-up modem and telephone line for sending requests and uploading files, which limited performance. But now the technology allows two-way access, eliminating the need for an additional dial-up modem. Here discussing more about the one-way satellite internet and the providers and compare their price and performance.

One-way Satellite Internet

Basic one-way satellite Internet connections operate on a very basic principle. The consumer sends a command to a server, the server processes the command and the resultant data is beamed via satellite back to the consumer. The paths taken by the uplinked and downlinked data are extremely different. However, the downloaded data is delivered via satellite at near broadband speeds. The uploaded data generally represent only a small fraction of the data exchanged in an Internet session. Since this data is relatively small, one-way satellite Internet users send their input and upload through a dial-up telephone connection to the service provider's servers.

How Does It Work?

Dial up connection should enable on computer through an Internet Service Provider to establish a normal Internet connection. When request a web page or a file is made via your dial up connection, all data is first gathered on the internet and then sent directly to the computer at high speed via the satellite link. We can use standard internet browser to browse. When computer connects and request to retrieve site, the initial request for service is started. The request then goes through the indoor modem and out to the internet satellite provider's satellite dish. The request is transmitted about 22, 000 miles above the Earth's surface to an orbiting satellite. The request is then beamed back to the closest satellite dish and send to the web server that you are trying to establish a connection with. The request goes back the same way that it came to deliver the request that you sent. All of this communications happens in less than 700 milliseconds.

Cost

Prices will vary from depending on the company and the type of plan that required. One-way satellite prices differ but are available from around £15 a month for downloads speeds of 512 Kbps and upload speeds of 128 Kbps. This speed is good enough for the average user that has basic internet needs like email and web browsing. For those that do a lot of music and video downloads there are faster packages available. Installation costs for one and two way satellite services are higher than other types of broadband connections. On the other hand, in certain areas will get grants to help small businesses choosing satellite where ADSL and cable modem access is not existing.

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System Requirements and Equipment

Need the equipment to be installed to start receiving a satellite connection. You need the indoor modem and a place to install your dish outside. A computer with anything less than Windows 2000 or less than the Mac OS 10.4 won't support satellite internet. Also require at least 128MB of RAM and 100 MB of space on your hard drive. Any computer will need an Ethernet card, as well.

Weaknesses

Even though satellite Internet is considered as a broadband Internet service and is capable of download speeds approaching 600 kilobits per second, the upload speed limitations make satellite the slowest broadband connection. With upload speeds of one way satellite service limited by the telephone company's switching equipment, upstream communications max out at about 56 kilobits per second. The users, who upload large amounts of data, play online games or frequently use chat rooms may cause an unexpected lack of functionality due to this limitation.

Benefits of One way Satellite Internet

Even though there are drawbacks for satellite Internet service, it offers a high speed data support to rural users who would otherwise be completely without Internet connectivity. Businesses in remote areas if not served by cable or DSL Internet services can use satellite service to create and maintain a web presence, linking them to mainstream information, suppliers and shoppers.