Bluetooth research

• A short-range wireless technology designed to allow connection of portable devices in a wire-free manner. It offers short-range wireless communications between compatible devices for transferring data files such as photo or music files
• It is used to transfer multimedia content such as audio, video, text and animation to other devices that have Bluetooth capability. Examples of Bluetooth capable devices include phones, laptops, computers etc…
• There are different types of bluetooths. The exterior features of Bluetooths vary according to the manufacturers. These are visible differences but there are types of Bluetooth with different interior technical distinctions.
Firstly there are classified by their power levels. There are three basic power levels: Class1 devices which use 100mW (milliwatts) and have an operating range of up to 100 meters, Class2 devices which use 10mW (milliwatts) and have an operating range of up to 10 meters, and Class3 devices which use 1mW (milliwatts) and have an operating range of 0.1-10 meters.
Bluetooths are also classified according to their security levels: Mode1- Non-secure where No security is implemented, Mode2- Service-level security where Access is granted to individual services, and Mode3- Link-level security where Security is enforced at a common level for all applications at the beginning of the connection.
• The advantages and disadvantages of each type is pretty self explanatory. Obviously if you have a Class1 device with Mode3 link-level security, you are much better off than if you were to have a Class3 device with Mode1”non-secure”. But the advantages and disadvantages of Bluetooth as a whole are:
Advantages:
 Inexpensive
 Its range for transferring files even when you have walls, windows, or other physical obstructions.
 Automatic(unless you set it to manual)
 Wireless
 Bluetooth devices are capable of communicating with multiple other Bluetooth capable devices at any given time.
 Low energy consumption, which means longer sharing.
 Share voice and data
 It is upgradeable
Disadvantages:
 Minor interferences (however the new technology is rapidly fixing emerging problems like these ones in an instant)
 Bluetooth implementations normally limit the PIN number range. A PIN number is usually only four digits and the scalability for large environments is difficult.

• The YouTube video explains how Bluetooth works. But this is how it works: It comprises of a base band processor, a radio and an antenna. The base-band processor converts the data into signals, which radios can decipher. The antenna of another blue tooth device, within at least 30 feet distance, receives a transmitted signal in the air. The signals are processed in the reverse order. Bluetooth technology provides a 10-meter personal bubble that supports simultaneous transmission of both voice and data for multiple devices.
• Bluetooth was introduced by Toshiba for $199. Now it can range from $40 to $200 depending on the type of the device.
http://www.gartner.com/it/page.jsp?id=1328113
• This website states that there are going to be two new versions of Bluetooth available for the market in 2011. These include Bluetooth 3 which has 802.11 as a bearer-This bearer apparently makes data transmission faster. It is very suitable for consumer class lifestyle as consumers are demanding for a greater bandwidth in order to transfer large files such as images and videos. Bluetooth 4 will introduce a new low-energy (LE) mode that will enable communication with external peripherals and sensors. This will be used more in the industrial areas such as fitness, healthcare and environmental control. They can also use it enable new functions in handsets such as autolock when users move away from them. The improvements for Bluetooth always include better security levels and battery life.

- www.mobilefonereviews.co.uk/mobile-phone-glossary.aspx
- www.vodafone.com/start/investor_relations/shareholder_services/faq/glossary.html
- http://www.tech-faq.com/bluetooth.html
- http://www.bluetomorrow.com/about-bluetooth-technology/general-bluetooth-information/bluetooth-advantages.html
- http://www.bluetomorrow.com/bluetooth-reviews/phone-and-phone-system-reviews/vtech-ls6245-expandable-bluetooth-phone-system.html
- http://www.gartner.com/it/page.jsp?id=1328113