Bluetooth Technology Todays Advanced Wireless Communication System

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ELECTRICAL PROJECTS
ELECTRICAL PROJECTS
Bluetooth Technology
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Bluetooth Technology
Introduction

• Bluetooth is a new technology standard using
  short-range radio links, intended to replace the
  cable connecting portable and fixed electronic
  devices.
• The standard defines as a uniform structure for a
  range of devices to communicate with each other.

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Bluetooth Technology
Bluetooth Architecture

• Bluetooth communication occurs between a master
  radio and a slave radio.
• Each radio has a 48-bit unique device address
  (BD_ADDR) that is fixed.
• Two or more radio devices together form ad-hoc
  networks called piconets.
• Each piconet has one master device and one or
  more slaves

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Bluetooth Technology

• Multiple piconets with overlapping coverage areas
  form a scatternet.
• Each piconet may have only one master, but slaves
  may participate in different piconets on a
  time-division multiplex basis.
• A device may be a master in one piconet and a
  slave in another or a slave in more than one
  piconet.

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Bluetooth Technology
Protocol Stack

• The Bluetooth Special Interest Group (SIG)has
  developed the Bluetooth Protocol Stack.
• The main objective of these specifications is to
  set down the protocols that must be followed by
  companies when manufacturing and developing both
  software and hardware to interoperate with each
  other.
• The main principle in mind when developing the
  Bluetooth Protocol Architecture has been the
  maximization and the re-use of existing protocols
  for different purposes at the higher layers.
• The Bluetooth Protocol Architecture also allows
  for the use of commonly used application
  protocols on top of the Bluetooth-Specific
  protocols.

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Bluetooth Technology
Protocol Stack
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Bluetooth Technology

• The Bluetooth Core protocols (plus the Bluetooth
  radio) are required by most of Bluetooth devices
  while the rest of the protocols are used only as
  needed.
• The combination of the Cable Replacement layer,
  the Telephony Control layer and the adopted
  protocol layer form the application-oriented
  protocols which enable applications to run over
  the Bluetooth Core protocols.
• Bluetooth Protocol Architecture has been
  developed by the Bluetooth Special Interest Group
  (SIG) are intended for rapidly developing
  applications using Bluetooth technology.

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Bluetooth Technology
Transmission types and rates

• The baseband (single channel per line) protocol
  combines circuit and packet switching.
• To assure that packets do not arrive out of
  order, slots (up to five) can be reserved for
  synchronous packets.
• Circuit switching can be either asynchronous or
  synchronous. Up to three synchronous (voice) data
  channels, or one synchronous and one asynchronous
  data channel, can be supported on one channel.
• Each synchronous channel can support a 64 Kb/s
  transfer rate, which is fully adequate for voice
  transmissions.

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Bluetooth Technology

Bluetooth connections techniques

• Standby
• Page/Inquiry
• Active
• Hold
• Sniff
• Park

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Bluetooth Technology
Bluetooth Usage Model

• Bluetooth Model is Used voice/data access points
  peripheral interconnects Personal Area Networking
  (PAN).

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Bluetooth Technology
Bluetooth Usage Model

• Peripheral Interconnects The second category of
  uses, peripheral interconnects , involves
  connecting other devices together

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Bluetooth Technology
Bluetooth Usage Model
Personal Area Networking The last usage model,
Personal Area Networking (PAN ), focuses on the
ad-hoc formation and breakdown of personal
networks
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Bluetooth Technology
Advantages

• No line of site restrictions as with IrDA.
• power consumption makes integrated in battery
  powered devices very practical.
• 2.4 GHz radio frequency ensures worldwide
  operability.
• Tremendous momentum not only within the computer
  industry but other industries like cellular
  telephones and transportation

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Bluetooth Technology
Applications

• The Internet Bridge
• An extension of this model could be a mobile
  computer that allows surfing the Internet
  irrespective of the location of the user, and
  regardless of whether the user is cordlessly
  connected through a mobile phone (cellular) or
  through a wire line connection (e.g. PSTN, ISDN,
  LAN, xDSL).
• To know more about Bluetooth applications
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