Bluetooth

Outline

This report is on how Bluetooth technology is changing the way we synchronize mobile devices and the technology that makes Bluetooth possible.

Introduction/Body

A. Bluetooth Technology

B. Uses of Bluetooth

Conclusion

C. The future of Bluetooth

B. Final thought

 Bluetooth takes small-area networking to the next level by removing the need for user intervention and keeping transmission power extremely low to save battery power. Picture this: You're on your Bluetooth-enabled cell phone, standing outside the door to your house. You tell the person on the other end of the line to call you back in five minutes so you can get in the house and put your stuff away. As soon as you walk in the house, the map you received on your cell phone from your car's Bluetooth-enabled GPS system is automatically sent to your Bluetooth-enabled computer, because your cell phone picked up a Bluetooth signal from your PC and automatically sent the data you designated for transfer. Five minutes later, when your friend calls you back, your Bluetooth-enabled home phone rings instead of your cell phone. The person called the same number, but your home phone picked up the Bluetooth signal from your cell phone and automatically re-routed the call because it realized you were home. And each transmission signal to and from your cell phone consumes just 1 milliwatt of power, so your cell phone charge is virtually unaffected by all of this activity. Recently a new technology was introduced to the electronics world. This technology is known as Bluetooth. Bluetooth is a wireless networking standard for your personal area that provides license-free operation in Europe, Japan, and the United States. What makes Bluetooth so special is its ability to create a wireless link between devices equipped with this new technology.

Bluetooth opens us up to a new level of data communications. By making it possible to communicate wirelessly to any device equipped with a Bluetooth chip. Mobile phones can communicate with lap top computers, digital daily planners can be linked to personal computers and have e-mail down loaded to them the moment it is sent a multitude of possibilities are born. Bluetooth works on a 2.4 GHz ISM "free band" which means that there is no restrictions for travelers using Bluetooth enabled equipment. For transmission of information between Bluetooth enabled devices there is no necessary "line of sight," which means that these devices do not work in the same fashion that television remote controls work. Devices that are equipped with Bluetooth can communicate room to room or from different floors in a office building instantaneously sharing and updating information.

The base band protocol for the Bluetooth chip is a combination of circuit and packet switching, which makes it possible to transmit both voice and data with the same device. The Bluetooth chip has two channels one channel capable of transmitting a 64 Kbit/s synchronous (voice) link, while channel two the asynchronous channel can support a 721Kbit/s asymmetric link in either direction. Both channel one and two are transmitted while allowing 57.6Kbit/s of information in the return direction. The actual link range is anywhere from 10cm to 10m between devices, however links

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