Wireless services symbolizes a development of technology, and perhaps a new era of telecommunications, but these services have been used for over a century and remain identical with the "radio". The modest beginning of wireless services takes us back to the 19th century at time when Guglielmo Marconi, "the father of radio" made his mark in the world of wireless technology.
When Marconi started experimenting with radio waves (Hertzian Waves) in 1894 his idea was to produce and detect radio waves over long distances. In 1896, Marconi was successful and obtained a patent and established the Wireless Telegraph and Signal Company Limited, the first radio factory in the world. In 1901, signals were received across the Atlantic and in 1905 the first wireless distress signal was sent using Morse Code.
Wireless technology ultimately progressed as an invaluable tool used by the U.S. Military. The Military configured wireless signals to transmit data over a medium that had complex encryption, which makes unauthorized access to network traffic almost impossible. This type of technology was first introduced during World War II when the Army began sending battle plans over enemy lines and when Navy ships instructed their fleets from shore to shore.
Wireless proved so important as a secure communications medium many businesses and schools thought it could expand their computing arena by expanding their wired local area networks (LAN) using wireless LANs. The first wireless LAN came together in 1971 when networking technologies met radio communications at the University of Hawaii as a research project called ALOHNET. The bi-directional star topology of the system included seven computers deployed over four islands to communicate with the central computer on the Oahu Island without using phone lines. And so, wireless technology, as we know it, began its passage into every house, classroom, and business around the world.
Wireless network technology has been implemented for a number of things including cell phones, PDA's, and personal and business computers. There are three types of wireless networks, wide area networks (WAN), wireless local area networks (WLAN), and personal area networks (PAN). Wide area networks include the networks provided by the cell phone carriers. Wireless local area networks are networks set up to provide wireless connectivity within a certain coverage area. Personal area networks are networks that provide wireless connectivity over distances of up to 10m or so.
Wireless networks have many advantages, but also has many disadvantages to.
Wireless begins with a brief discussion of the 1995 centennial of the invention of radio by Marconi and a rebuttal by the British historians who oppose this claim. Using underused or previously overlooked or perhaps ignored resources the author disproves the claims against the originality and ingenuity of Marconi's 1897 patent on wireless telegraphy. While credit is given to several British scientists and engineers and their scientific discoveries and inventions, it was Marconi, a practitioner, who made the first significant breakthrough in practical wireless telegraphy when he "connected one end of the plate of the receiver, and one end of the transmitter, to the earth" (p. 20). Marconi transformed these scientific effects into wireless technologies and then exploited them for commercial purposes. The focus of British scientists and engineers on optical analogies, scientific experimentation and demonstration, and the fear of British national interests becoming monopolized (particularly by a foreigner) are the primary reasons for the dispute surrounding Marconi's patent. (By 1897 it was clear how wireless telegraphy would impact military interests.) The author shows in great detail how British scientists and engineers, namely physicist Oliver Lodge, J. J. Thomson, Minchin, Rollo Appleyard, and Campbell Swinton, deliberately constructed false scientific and social claims to discredit the originality of Marconi's patent.
at sea, in 1909, 1,700 lives were saved just because of a wireless call. Along side all the
Radio waves were first discovered in 1887, but radio itself was initially invented by Italian Guglielmo Marconi in 1895 (1). His biggest mentioned success was in 1901, when he managed to broadcast the letter “S” across the Atlantic Ocean (1). However, he focused primarily on point-to-point transmissions, not large scale broadcasts from one point (F). As such, three American inventors - Lee De Forest, Edwin Howard Armstrong, and David Sarnoff - took credit for making radio as it is today a success (F). De Forest was born and raised in Alabama and he thought of everything in terms of patents and eventually held more than 300, but many claimed that he simply stole the inventions of others (2). In 1900, he patented a device to enhance weak signals and in 1902, he formed the De Forest Wireless Telegraph Company (1). In the same year. Reginald Fessenden, a Canadian, invented the “electrolytic detector”, which later became the spade detector that brought De Forest so much fame (F). In 1904, John Fleming invented the oscillation valve, which later became De Forest’s audion, and De Forest won the gold medal at the St. Louis World’s Fair for his “spade detector” (F). De Forest gained quite a bit of fame by broadcasting music live from the Eiffel Tower and from the Metropolitan Opera; however, many believed that this was a scam and that he had actually had the device broadcasting the signal only a few blocks away (F). In 1906, he envisioned bringing music and voices to all American households, but as it turns out Canadian inventor Fessenden had already broadcasted a Christmas greeting and music to the crew of a ship off the coast of Canada on Christmas Eve a year earlier (F). In 1912, Armstrong became prominent by inventing regeneration, wh...
Wireless networks – While the term wireless network may technically be used to refer to any type of network that is wireless, the term is most commonly used to refer to a telecommunications network whose interconnection between nodes is implemented without the use of wires, such as a computer network. Wireless telecommunication networks are generally implemented with some type of remote information transmission system that uses electromagnetic waves, such as radio waves, for the carrier and this implementation usually takes place at the physical level or “layer” network.
first recorded human voice reciting faint verses of “Mary had a Little Lamb”, was heard by a select few inventors and would change the fabric of social culture worldwide. This seemingly frivolous technology would grow to become one of the most impactful means of communication. Radio was invented by Guglielmo Marconi in 1895 as "wireless telegraphy", or a means for sending Morse code through the air, but on December 24th, 1906, a few wireless operators on ships in the North Atlantic heard not the usual dots and dashes but a voice reading from St. Luke's Gospel. It was Reginald Fessenden, an American who had devised a means for radio waves to carry signals for
Although the radio gained popularity in the twenties, its initial presence on the forefront of technology was in the late 1800’s when an Italian inventor, Guglielmo Marconi, successfully sent and received the first radio signal in Italy. It was not until World War I that the United States began to utilize radios, and their main purpose was for communication betw...
Radio advertising would be impossible without the radio. Radio waves were discovered and studied by Heinrich Hertz in 1867 (Schoenherr, 2001). Guglielmo Marconi invented a transmitter in 1894 and formed the first wireless telegraph and signal company in 1897 (Schoenherr, 2001). Reginald Fessenden of Canada invented the continuous-wave voice transmitter and sold it to Westinghouse in 1910. Several amateurs began to broadcast information from music to news over the airwaves as soon as crystal radio receivers became available from 1912 to 1921 (Schoenherr, 2001). Because of the Titanic disaster, all ships were required to have radios and radio operators on board. RCA started in 1919 to mass produce radios (Schoenherr, 2001). NBC was founded in 1926 and produced a 47 station network by 1928.
Radio was invented in 1896 as a form of wireless telegraphy, which transmits the Morse code without the need for fixed stations and cables; this system was initially used at sea. Radio in the UK and US took a Eurocentric approach, which was the view from the west.
WLAN (Wireless Local Area network) and its components: The task of developing a WLAN on commercial front possesses a greater challenge. Developing initial design, purchasing and installing components, managing and providing maintenance to the systems are the main basic parts of the WLAN. When we use WLAN on a commercial front then we may face the security and privacy concerns. The total area of that particular commercial area should be accessible. This is only possible with installing huge number of access points. The various components of the WLAN are
Guliemo Marconi first created the radio. He invented it for navigational purposes. Marconi tried to mass-produce his idea but no bankers would lend him money because they thought there would be no money in it. After searching high and low for investors Marconi gave up. Later on in his life the U.S. government bought out his idea for navel and army uses. The government realized that they can do a lot more with it than use it as a navigational tool: They figured out that they can send voices and sounds through it and used it as a two-way communication device, then later found out that it can be used as more than a two-way. As this device was progressing, it became TV station waves (Later stated). The radio played a big part in world war I and II, not only on the battle field but on the home-front as well: People bought radios to use a listening devices to hear the news and there favorite broadcasting programs such as The Shadow, War of the Worlds, Suspense and Amos& Andy.
Every invention ever known to man had pioneers or people who contributed to the creation of the product. Radio had many pioneers that allowed for its creation and their names are Heinrich Hertz, Nikola Tesla, Ernst Alexander, Edwin Armstrong, Guglielmo Marconi, Lee DeForest, Frank Conrad, Reginald Fessenden, and Edward Armstrong. It all started with a German physicist named Heinrich Hertz who in 1884 proved that you could transmit and receive electric waves wirelessly. Hertz thought that the work he had done had no use whatsoever but little did he know that what he done is considered the fundamental building block of radio, and that is the reason why every frequency measurement is named after him (Short). In that same year a Serbian-American inventor named Nikola Tesla came to the U.S and sold patents to his inventions to a man named George Westinghouse. After that Tesla established his own lab which is where he built the tesla coil , an induction coil that is still used in radio today (Short). The next progression of radio focused on more than just the transmission of waves, the new focus was transmission of speech. The first to begin to add speech into the radio mix was Ernst Alexander, a Sweden born inventor who developed the first alternator to make speech transmission possible (Short). This was so new to the s...
Radio. At first there was the print, and then there was sound . . . In 1821 an English man named Wheatstone reproduced sound. However, the future of radio didn¡¦t really begin until 1890 when Branly transmitted the first radio waves in France. In 1901 the American Marconi Company, the forerunner of RCA, sent radio signals across the Atlantic. And five years later, ¡§a program of voice and music was broadcast in the United States.¡¨
Local Area Networks also called LANs have been a major player in industrialization of computers. In the past 20 or so years the worlds industry has be invaded with new computer technology. It has made such an impact on the way we do business that it has become essential with an ever-growing need for improvement. LANs give an employer the ability to share information between computers with a simple relatively inexpensive system of network cards and software. It also lets the user or users share hardware such as Printers and scanners. The speed of access between the computers is lighting fast because the data has a short distance to cover. In most cases a LAN only occupies one or a group of buildings located next to each other. For larger area need there are several other types of networks such as the Internet.
The propose research will address a problem confronting many two year institutions in the present-day (i.e. how to best plan, design, and implement WLAN technologies). While WLAN technologies offer the benefits of mobility, reduced installation time, and decreased cost, many challenges must be met by institutions deploying them (Geier, 2005). These issues are related to security, speed, interoperability, and equipment selection, ease of use, reliability, signal interference, installation, and health risks.
Wireless is everywhere today whether at home working from your WIFI network to work where you might be linked a wireless network or even through your phone through a 3G or 4G network to connecting to an open wireless networks. As you can see for the most part people are connecting to wireless from the moment they leave their home till they get to work and then back. While wireless comm...