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BlueTooth

BlueTooth. By: Trevor Parker, Minh-Tri Le. What is Bluetooth?. Bluetooth is a wireless technology that is a low-cost, low-power, short-range radio for ad-hoc wireless communication, were data or voice can be transmitted from a Master to slave module. http ://www.ni.com/white-paper/7104/en.

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BlueTooth

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  1. BlueTooth By: Trevor Parker, Minh-Tri Le

  2. What is Bluetooth? • Bluetooth is a wireless technology that is a low-cost, low-power, short-range radio for ad-hoc wireless communication, were data or voice can be transmitted from a Master to slave module. http://www.ni.com/white-paper/7104/en

  3. History of Bluetooth • Bluetooth is named after a 10th century Danish King HaraldBlatand, who unified Denmark and Norway. • In 1994 – Ericssons worked with the concept while studying wireless technology to link mobile phones • In 1998 Bluetooth Special Interest Group (SIG) was formed • Ericsson, Intel, IBM, Nokia, Toshiba • In 1999 the First Specifications were released • In 2001 the first retail products were sold

  4. http://www.slideworld.com/slideshow.aspx/An-Introduction-to-BLUETOOTH-TECHNOLOGY-ppt-754898#http://www.slideworld.com/slideshow.aspx/An-Introduction-to-BLUETOOTH-TECHNOLOGY-ppt-754898#

  5. Classes and versions of Bluetooth • 3 classes • Class 3 – range: 1-3m • Max power of 1mW • Class 2 – range: 10-30m • Max power of 2.5mW • Class 1 – range: 100-300m • Max power of 100mW • Versions • Version 1- Data rate: 1Mbit/s • Newest version 4 – Data rate: +24Mbit/s • Includes Bluetooth low energy(BLE) and highspeed

  6. Piconets/Scatternet • Several Bluetooth devices joined are called a piconet, normally up to a maximum of 8 devices. • The main device acts as the master and every other device turns into a slave to it. • Though in turn any of those devise could be the master to another set of slaves. This is called a scatternet.

  7. Net examples Piconet Scatternet http://www.developer.nokia.com/Community/Wiki/Bluetooth_Protocol http://www.slideworld.com/slideshow.aspx/An-Introduction-to-BLUETOOTH-TECHNOLOGY-ppt-754898#

  8. Security • Longer encryption keys (128 bit key) • Application encryptions • Link authentication • Personal Identification numbers • Frequency hopping

  9. Packet Structure

  10. Frequency Hopping • Bluetooth uses Frequency Hopping, which reduces interference from things like microwaves and baby monitors • The frequency hopping occurs 1600 times per sec • http://www.slideworld.com/slideshow.aspx/An-Introduction-to-BLUETOOTH-TECHNOLOGY-ppt-754898#

  11. Master-Slave Communication • Channel is divided into consecutive slots (each 625 us) • One packet can be transmitted per slot • Subsequent slots are alternatively used for transmitting and receiving • Master can send packets to a slave only in EVEN slots • Slave can send packets to the master only in the ODD slots

  12. Software Protocols • LMP: control the radio link between two devices • L2CAP: link the controller and allows interoperability between Bluetooth devices • SDP: allows automatic detection of Bluetooth devices without affecting the other service discovery protocols • RFCOMM: serial data transfer • TCS: set up and control speech and data calls between Bluetooth devices

  13. Question?

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