“ Things that think…don’t make sense unless they link.” Welcome to the World of Bluetooth -imagine the world without wires
:Overview of Bluetooth:• What is Bluetooth? – Bluetooth is a short-range wireless communication technology.• Why this name? – It was taken from the 10th century Danish King Harald Blatand who unified Denmark and Norway.• When does it appear? The Bluetooth specification was first developed in 1994 by Sven Mattison and Jaap Haartsen, who were working for Ericsson Mobile Platforms in Sweden. – 5 companies (Ericsson, Nokia, IBM, Intel & Toshiba) joined to form the Bluetooth Special Interest Group (SIG) in 1998. – First specification released in July 1999.
:Bluetooth technology:• Bluetooth stands for short-range transmission of digital voice and data that supports point-to-point and multipoint applications.• Frequency range : ISM (industrial, scientific, medical radio-bands) 2400-2480 MHz• Vanishes the need of cords & wires.• Range of connection : 50 meters or 164 feet.• One-to-one connections allow maximum data transfer rate of 723 kbit/s.• low power consumption, drawing only 0.3 ma in standby mode. This enables maximum performance longevity for battery powered devices.
:Different Versions of Bluetooth: Bluetooth v1.0 and v1.0B Bluetooth v2.0 + EDR ( with Bluetooth hardware device address ) ( enhanced data rate ) Bluetooth v3.0 Bluetooth v4.0 ( high speed data transfer ) ( low energy consumption recently used in apple iPhone 4S & iPad ) Bluetooth v2.1 ( secure simple pairing-SSP ) Bluetooth v1.2( faster connection and discovery ) Bluetooth v1.1 ( ratified as IEEE standard 802.15.1-2002 )
Bluetooth is a packet-based protocol with amaster-slave structure. One master maycommunicate with up to 7 slaves in a piconet. Point to Point Link – Master - slave relationship – Bluetooth devices can function as masters or slaves. Piconet – It is the network formed by a Master and one or more slaves (max 7). – Each piconet is defined by a different hopping channel to which users synchronize to. – Each piconet has max capacity (1 Mbps).
: Bluetooth Protocol Stack : • The heart of the Bluetooth specification is the Bluetooth protocol stack By providing well- defined layers of functionality, the Bluetooth specification ensures interoperability of Bluetooth devices and encourages adoption of Bluetooth technology.
: Bluetooth Profiles :• In order to use Bluetooth wireless technology, a device must be able to interpret certain Bluetooth profiles. The profiles define the possible applications.• To perform its task, each profile uses particular options and parameters at each layer of the stack .• Certain examples : Generic Access Profiles, Telephony Control Protocol Specification Generic Object Exchange Profiles Serial Port Profiles.
: Health Concerns :• Bluetooths transmitter uses the same frequency range as microwave Ovens (Bluetooth uses 2.402 GHz to 2.480 GHz).• The transmitting power is too weak to be noticeable for humans. When using a wireless phone or a Bluetooth device, some of the emitted RF energy is absorbed by the body. The penetration depth is about 1.5 cm at 2450 MHz which means that the absorption is very superficial resulting into low health risks.
Applications Hands free headsets In 2004 released cars like toyota prius & lexus ls 430 have hands free call system to ensure safe driving. In Gaming consoles like Sony Playstation3 , PSP Go
Applications Digital Pulse Oximetry SystemWireless connection of input/output devices like key-board, Monitor, mouse,Printer etc with PC. Wireless internet access using Bluetooth Dongle.
Applications Apple iPad, iPhone 4S Smart sunglasses
: Future of Bluetooth :• Success of Bluetooth depends on how well it is integrated into consumer products. Because, – Consumers are more interested in applications than the technology. – Must provide benefits for consumers. Key Success Factors : – Interoperability – Mass Production at Low Cost – Ease of Use – End User Experience