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Public Wi-Fi

Written By: admin on August 14, 2010 No Comment

Wireless hotspots are spreading across the world’s cities, with blanket wi-fi zones now being rolled out in many city centres. Operators are providing wireless surfing at the touch of a button from the park, the bus or the street corner.

How Does WI-FI Work?

Wi-fi is the acronym for Wireless Fidelity, essentially a set of standards for transmitting data over a wireless network. Wi-fi allows you to connect to the net at broadband speeds without cables, as long as you have the right equipment and, in most cases, a regular internet service provider and a wi-fi account. To understand the technology behind wi-fi, imagine using a walkie-talkie. Your voice is picked up by a microphone, encoded onto a radio frequency and transmitted with the antenna to another walkie-talkie, which decodes your voice. Wi-fi works in broadly in the same way, but using a better radio that is capable of handling a lot more data per second.

Wi-fi uses antennas around which wi-fi “hotspots” are created. The hotspots are outlets equipped to receive the radiowaves that power wireless networking. Until recently, wi-fi has been confined to more than 10,000 hot-spots in cafes, bars and airport lounges. But various projects are under way to set up city-wide zones, where a series of antennas are installed in the streets, on lampposts or street signs. The hotspots around them together create a much wider area of coverage. Norwich has a mesh network which links each lamppost antenna to the next creating a seamless wi-fi hotspot around the centre of the city.
The source internet connection is provided by a PC or server to which the antennas are connected either wirelessly or via a cable.
Some mobile phones and personal digital assistants (PDA) now have wi-fi chips installed. With mobile phones, this means conventional networks can be bypassed and inexpensive long-distance calls made over the web (using Voice over Internet Protocol, VoIP).
Many laptops and handheld computers now come with built-in wi-fi connectivity; it is also possible to add wi-fi to your computer with a special card that plugs into a port on your laptop.

How do I use a giant wi-fi zone?

In the UK, there are already more than 10,000 wi-fi hotspots in public places such as restaurants, hotels, cafes, libraries and airports. Wi-fi-enabled laptops and phones can be set up to connect to these hotspots automatically; usage is generally paid through a credit card at a login page on a web browser. Frequent users may even have accounts with service providers such as T-Mobile, BT Openzone, O2, SkypeZones and Nintendo wi-fi. Experts advise you to install security software and update it regularly.

Will it catch on?

So far, wi-fi has been a service that is most useful for business people who need to work on the move; but operators want to make it available to all. In Norwich the local authority and regional development agency are pioneering a free wi-fi service. This model could catch on, if successful. More than 3,000 connections are being made to the city’s wi-fi network each week.

Who stands to profit?

Users of the new city-wide wi-fi networks will be required to pay access charges to an account provider, such as BT Openzone or T-Mobile. The revenues will be shared between the owners of the street furniture on which the equipment is installed (usually local councils), wi-fi hotspot suppliers and the internet service providers.

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