bluetooth

 

Introduction to Blue-Tooth Technology

          Well it isn't some strange form of tooth decay as you might initially imagine. Bluetooth is the name of a new technology, set to commercially come out in bulk around 2002. It promises to change significantly the way we use machines. This technology is basically an application of the “Wireless Connectivity”. Wireless  meant by connection without wires. Trough this technology we can feel “Out Of Loop” as this Wireless Connectivity supports conections of the laptop, mobiles & pagers without wires. “Connectivity” that is the word of the new millennium. People want total access at all times. Cell phones have web capabilities, allowing users to check there e-mail, do basic searches or check the weather forecast. Business travelers have to stay connected and have to stay organized. They have their laptops so they can do work on the road, their mobile phones so they can be reached at all times, and their PDAs (Personal Digital Assistant) to help them stay organized. There are many different technologies currently being researched to help with this new form of mobile communication, one of which is Bluetooth wireless technology. In phase with the IT-boom, the mobility among people has constantly grown and wireless technologies for voice and data have evolved rapidly during the past years.

                           Countless electronic devices for home, personal and business use have been presented to the market during recent years but no widespread technology has been presented to address the needs of connecting personal devices in Personal Area Networks (PANs). The demand for a system that could easily connect devices for transfer of data and voice over short distances--without cables--grows stronger, and unlike infrared devices, Bluetooth units are not limited to line-of-sight communication.

     

      What is Blue-Tooth :-

         DEFINATION :-

         “Blue-tooth is a low-cost, short-range radio link between laptops, mobile phones, network access points and other devices. It can replace cables and can be used to create ad hoc networks and provide a standard way to connect devices anywhere in the world.”
                     If information appliances do outsell PCs by 2002, as market studies project, a technology called Bluetooth will come into its own. Bluetooth will connect all kinds of devices wirelessly and (its backers hope) effortlessly. At 0.1W of power and a potential cost of $5 or less per device in mass-market volume, Bluetooth is both low-powered and relatively low-priced - qualities that make it ideal for mobile appliances.

With a single, small radio chip, Bluetooth technology can replace cumbersome cable connections in all sorts of devices, from laptops to headphones to printers. It's likely to turn up in the second half of this year in some high-priced cellular        phones and as an option on some laptops.

On your laptop, Bluetooth will provide a simple way to wirelessly send pages to a printer or to hook up to the Internet by connecting wirelessly with your Bluetooth-enabled cellular phone. Your cell phone itself could reside safely in your pocket as you have a conversation over a Bluetooth wireless headset such as the one recently demonstrated by Ericsson Datacom Inc. in Burlington, Mass.

But Bluetooth can do more than just replace point-to-point cables. Its supporters say a second wave of applications will follow next year. We could see Bluetooth used to join multiple devices into an instant, ad hoc network. Some envision executives in a meeting linking their handheld computers to compare agendas or to exchange virtual business cards. A speaker's laptop could wirelessly "squirt" its slides to an LCD projector.

Another advanced use would be Internet or LAN access points - by standing near the access point, your cell phone or handheld could log on at a quite respectable speed of 721K bit/sec.

Bluetooth was proposed two years ago by Ericsson, IBM, Intel Corp., Nokia Corp. and Toshiba Corp., which formed the Bluetooth Special Interest Group (SIG). They have since been joined by almost 2,000 companies. The blue logo that will identify Bluetooth-enabled devices is derived from the runes for his initials. When the technology was first announced in May 1998, there were optimistic predictions that Bluetooth products would flood the market by late 1999. But various factors have worked against that scenario, including the hesitance of Microsoft Corp. to commit to the Bluetooth protocol. The software maker finally joined the SIG in December, opening the door to Bluetooth support in Windows and on Pocket PCs.

HISTORY OF BLUE-TOOTH :-

Bluetooth, which could become one of the defining technologies of the 21st century, has its roots in a town that dates back to the 10th century. Lund, Sweden, a vibrant college town near the southern tip of the country, is where the Swedish cell phone giant Ericsson started the Bluetooth movement in 1994. Ericsson's primary research facility is closely tied to the town's university.

Bluetooth co-inventor Jaap Haartsen said the technology, like many great inventions, came about almost by accident.

            "The original intention was to make a wireless connection between something like an earphone and a cordless headset and the mobile phone," Haartsen said.        Realizing they could tap into a low radio frequency that required no licensing and was available to anyone in the world who wanted it, Haartsen and his colleagues began experimenting with computer chips. They eventually settled on small radio chips that make wireless connection between devices containing them. To encourage development and get as many companies as possible on the bandwagon, Ericsson did something a bit rare: It gave the technology away for free. "We saw (there were) more opportunities and benefits to us to give it for free because we created one standard instead of having very different standards," said Ericsson's Jan Ahrenbring.  And for their namesake, they chose a Viking king in Denmark who united Scandinavian countries in the Middle Ages.

The Blue Tooth was built in 1963 by Tom Storrs. King Harald I of Denmark (b.910-d.985), called Harold Bluetooth, was king of the fiercest Viking nation at  age for 45 years. He is reported to have united Denmark & Norway & also brought Cristinia to the Scandinavia. Blatand translate approximately to blue-tooth the king’s teeth had a bluosh hue owing to his foundness for the blue-barries. As this new technology originated in Scandinavia its propogators thought it approximately to name it after a Scandinavian king who united this countries. The Bluetooth SIG includes promoter companies 3Com, Ericsson, IBM, Intel, Lucent, Microsoft, Motorola, Nokia and Toshiba, and more than 2000 Adopter/Associate member companies. 

            SIG GROUP(THE DRIVING FORCR BEHIND BLUETOOTH)  :-

The Bluetooth Special Interest Group (SIG) is an organization of over 2,000 collaborating technology and telecommunications companies that focus on further developing Bluetooth-enabled products. The Bluetooth SIG is lead by a nine-company Promoter group, consisting of some of the biggest and most well-know organizations in their respective industries: 3COM Corporation, Ericsson, IBM Corporation, Intel Corporation, Lucent Technologies, Microsoft Corporation, Motorola Inc., Nokia, and Toshiba Corporation. It is the heavy involvement of the Promoter group that will ultimately drive this technology to the forefront of wireless communications.The Bluetooth SIG has strict guidelines when it comes to developing this wireless technology. The SIG created the Bluetooth Specification, a standards document that insures every piece of Bluetooth technology can work seamlessly with each other. The Specification is made up of two parts:

1.)                              The Core, which specifies the components used in Bluetooth technology and how its applications work with other wireless protocols, including infrared and other radio frequency-based technology, and

2.)                               The Profiles, which lays out the specific protocols and procedures needed for different types of Bluetooth applications.

The assignment of the SIG originally was to monitor the technical development of short-range radio and to create an open global standard, thus preventing the technology from becoming the property of a single company. This work resulted in the release of the first Bluetooth Specification in July 1999. The further development of the Specification still is one of the main tasks for the SIG, other important ones being interoperability requirements, frequency band harmonization and promotion of the technology.

Requirements for the blue-tooth:-

The Ericsson solution is a high performance full implementation of the Bluetooth Specification featuring:

·         Lowest CPU load on the market: our architecture allows for integrated applications. More than 80% of the ARM processor power is left for applications, which lowers the total system cost.

·         Full functionality: we are the first on the market with silicon that has full Bluetooth functionality: seven slaves, master/slave switch, point-to-point and multi-point, all power saving modes, and all packet types.

·         Maximum Bluetooth data rate according to the Bluetooth Specification.

·         High-performance of robust radio designed for the toughest of all environments--the mobile phone. It is the high level of integration that makes our design so robust.