Definition of BluetoothBluetooth is a short range (10-100 m)and low-cost wirelessnetwork system to replace cables andgive RF connectionbetween consumer devices.
• What is Bluetooth? o Bluetooth is a short-range wireless communications technology.• Why this name? o It was taken from the 10th century Danish King Harald Blatand who unified Denmark and Norway.• When does it appear? o 1994 – Ericsson study on a wireless technology to link mobile phones & accessories. o 5 companies (Ericssn,Nokia,IBM,Toshiba & Intel)joined to form the Bluetooth Special Interest Group (SIG) in 1998 named. o First specification released in July 1999.
• Uses the radio range of 2.45 GHz• Theoretical maximum bandwidth is 1 Mb/s• Several Bluetooth devices can form an adhoc network called a “piconet”– In a piconet one device acts as a master (setsfrequency hopping behavior) and the others asslaves– Example: A conference room with manylaptops wishing to communicate with eachOther
• Laptops• Cellular phones• Personal Digital Assistants• Headsets• Printers• Keyboards/mice• GPS, etc…• Major use in consumer electronics
• Allows up to 8 devices to communicate in a localnetwork called a Piconet, also known as a PersonalArea Network or PAN • Because of its low power consumption, its range islimited to 10 m. • However, range can be increased to 100 m byemploying a scatternet topology or a higher poweredantenna • Three classes of Bluetooth devices-Class 3 radios – have a range of up to 1 meter or 3Feet.-Class 2 radios – most commonly found in mobiledevices – have a range of 10 meters or 30 feet-Class 1 radios – used primarily in industrial use
• The Bluetooth standard is maintained and publishedby the Bluetooth Special Interest Group (SIG) • Includes thousands of member companies • Covers topics such as interoperability, testing andqualification of bluetooth devices • Most important, outlines the specifications for:- Bluetooth Radio- Baseband- LMP – Link Manager Protocol
• Responsible for link set-up between devices,including security functions :– Authentication– Encryption
• Infrared IrDA (WPAN) : synchronization, linkbetween a phone and a laptop…– Less flexible than Bluetooth, need of a line of site– Comparable data rate• Wi-Fi (WLAN) : Wireless LAN access– Far higher bandwidth and data rate than Bluetooth– Higher power consumption than Bluetooth– Requires infrastructure investment
•Success of Bluetooth depends on how well it is integrated into consumer products -Consumers are more interested in applications than the technology -Bluetooth must be successfully integrated into consumer -- products -Must provide benefits for consumer -Must not destroy current product benefits•Key Success Factors -Interoperability -Mass Production at Low Cost -Ease of Use