Thursday, April 24, 2008

3 Mobile Network

3 is the UK 's leading mobile media company offering a convergence of communications, entertainment and information .

Setting the 3G agenda - the market leader in 3G

3 are at a significant moment in the history of communications and media. They have created a different type of business by defining a new category which fuses together information, communication and entertainment in to a single mobile device.

3 is the largest 3G network in the UK and Europe

The 3 network is available across eight countries and has over 11 million customers. In the UK alone, 3 acquired 3.5million 3G customers after 32 months of operations - that's more than the other UK mobile operators combined.

In 2003, 3 launched the UK 's first video mobile network to bring new and better services to the mobile media market. Given 3G was a new technology, 3 undertook one of the fastest network rollouts in UK history and met their license regulatory requirements three years ahead of schedule.

3 UK have a list of first to be proud of. They have created the mobile media world of Information, Communication and Entertainment and are the market leader in 3G.

* 3 launched the UK 's first live video mobile news and entertainment channel, "Today on 3".
* 3 was first to stream live TV over mobile in the UK (Grand National 2005).
* 3 launched the UK 's first "over-the-air" real-time multi-player gaming over mobile.
* 3 was the first to offer customers full-length music videos on mobile.
* 3 was first to launch Videomail (the video equivalent of voice mail).
* 3 was first to premiere music singles over mobile, ahead of traditional media(Robbie Williams' "Misunderstood" video and Natasha Bedingfield's "I Bruise Easily").
* 3 broadcast the world's first ever live streamed gig (artist: Rooster, Nov 2004)3 was the first network to sign music video agreements with the major labels.

3 was the first mobile operator to offer Barclays Football Premiership highlights on video mobile.

Wednesday, April 9, 2008

Impact of mobile phone usage

Like all high structures, cellular antenna masts creates a hazard to low flying aircraft. Towers over a certain height or towers that are closer to airports or heliports are normally required to have warning lights. There have been reports that warning lights on cellular masts, TV-towers and other high structures can attracting and also confusing the birds. US authorities estimate that millions of birds are killed near communication towers in the country …..

The Independent newspaper provided evidence for the theory that mobile phone masts are a major cause in the collapse of bee populations, with controlled experiments demonstrating a rapid and catastrophic effect on individual hives near masts.. The mobiles emittinig some kinds of radiation which are not god for human health and also not safe for our environment.. there are lot of problems are created by the this radiation… all these things want to be control immediately…

GSM cellular network

GSM is a cellular network, which means that mobile phones connect to it searching for cells. GSM networks can operate in four different frequency ranges. Most GSM networks are operates in the 900 MHz or 1800 MHz bands. Some countries in the Americas use the bands from 850 MHz and 1900 MHz because the 900 and 1800 MHz frequency bands were already allocated

The rarer 400 and 450 MHz frequency bands are assigned in some countries, where these frequencies were previously used for first-generation systems.

In the 900 MHz band there are two different frequency dand for both the uplink and the downlink,for the uplink frequency band is 890–915 MHz, and the downlink frequency band is 935–960 MHz.. Time division multiplexing is used in this to allow eight full-rate or sixteen half-rate speech channels per radio frequency channel. There are eight radio timeslots grouped that is called as TDMA frame. Half rate channels use alternate frames in the same timeslot.

The transmission power in the phone is limited to a maximum of 2 watts in GSM850/900 and 1 watt in GSM1800/1900. macro, micro, pico, femto and umbrella cells these are all the five different cell size in a GSM network. Indoor coverage is also effectively supported by GSM and may be achieved by using an indoor picocell base station,
Femtocells are cells are mainly designed for use in residential or small business environments and connect to the service provider’s network via a broadband internet connection.these are all the some of the points in the GSM