02-05-2011, 09:35 AM
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Bluetooth Technology
What Is Bluetooth?
Bluetooth wireless technology is a open specification for low-cost , low-power shorter range radio technology for ad-hoc wireless communication of voice and data anywhere in the world
OR
Bluetooth is a proprietary open wireless technology standard for exchanging data over short distances (using short wavelength radio transmissions) from fixed and mobile devices, creating personal area networks (PANs)
What is Bluetooth?
Bluetooth is a short-range wireless communications technology.
Why this name?
It was taken from the 10th century Danish King Harald Blatand who unified Denmark and Norway.
When does it appear?
1994 – Ericsson study on a wireless technology to page link mobile phones & accessories.
5 companies (Ericssn,Nokia,IBM,Toshiba & Intel)joined to form the Bluetooth Special Interest Group (SIG) in 1998 named.
First specification released in July 1999.
Allows up to 8 devices to communicate in a local network called a Piconet, also known as a Personal Area Network or PAN i.e Several Bluetooth devices can form an ad hoc network called a “piconet”
In a piconet one device acts as a master and the others as slaves
Because of its low power consumption, its range is limited to 10 m.
However, range can be increased to 100 m by employing a scatternet topology or a higher powered Antenna
A scatternet is a chain of piconets created by allowing one or more Bluetooth devices to each be a slave in one piconet and act as the master for another piconet simultaneously
Theoretical maximum bandwidth is 1 Mb/s
Uses the radio range of 2.45 GHz
Three classes of Bluetooth devices
Class 3 radios – have a range of up to 1 meter or 3 Feet.
Class 2 radios – most commonly found in mobile devices – have a range of 10 meters or 30 feet
Class 1 radios – used primarily in industrial use cases – have a range of 100 meters or 300 feet
Bluetooth Technology
What Is Bluetooth?
Bluetooth wireless technology is a open specification for low-cost , low-power shorter range radio technology for ad-hoc wireless communication of voice and data anywhere in the world
OR
Bluetooth is a proprietary open wireless technology standard for exchanging data over short distances (using short wavelength radio transmissions) from fixed and mobile devices, creating personal area networks (PANs)
What is Bluetooth?
Bluetooth is a short-range wireless communications technology.
Why this name?
It was taken from the 10th century Danish King Harald Blatand who unified Denmark and Norway.
When does it appear?
1994 – Ericsson study on a wireless technology to page link mobile phones & accessories.
5 companies (Ericssn,Nokia,IBM,Toshiba & Intel)joined to form the Bluetooth Special Interest Group (SIG) in 1998 named.
First specification released in July 1999.
Allows up to 8 devices to communicate in a local network called a Piconet, also known as a Personal Area Network or PAN i.e Several Bluetooth devices can form an ad hoc network called a “piconet”
In a piconet one device acts as a master and the others as slaves
Because of its low power consumption, its range is limited to 10 m.
However, range can be increased to 100 m by employing a scatternet topology or a higher powered Antenna
A scatternet is a chain of piconets created by allowing one or more Bluetooth devices to each be a slave in one piconet and act as the master for another piconet simultaneously
Theoretical maximum bandwidth is 1 Mb/s
Uses the radio range of 2.45 GHz
Three classes of Bluetooth devices
Class 3 radios – have a range of up to 1 meter or 3 Feet.
Class 2 radios – most commonly found in mobile devices – have a range of 10 meters or 30 feet
Class 1 radios – used primarily in industrial use cases – have a range of 100 meters or 300 feet
