Blue tooth
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Blue tooth






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    Blue tooth Blue tooth Presentation Transcript

    • Bluetooth
      By K.Gautam
    • What is BlueTooth?
      • Bluetooth is a proprietary open wireless technology standard for exchanging data over short distances
      • Targets ad-hoc piconets
    • The Name
      • It is named after Harald Gormsen, King of Denmark (10 th century AD)
      • It was so named because the designer at Erricson Liked vikings
    • Wireless Personal Area Networks(WPAN)
      • Criteria:
      • Market potential
      • Compatibility
      • Distinct identity
      • Technical feasibility
      • Economic feasibility
    • User scenarios
      • Connection of peripheral devices
      • Support of ad-hoc networking
      • Bridging of networks
    • Architecture
      • Networking
      • Bluetooth operates on 79 channels in the 2.4 GHz
      • 1 MHz carrier spacing
      • Piconet
      • One acts as master (M),
      • Other devices act as slave (S)
      • One Master and upto 7 slaves
    • Piconet
    • Protocol stack
      • Two types of specifications
      • Core specification
      • Describes physical layer to the data link control together with management functions
      • Profile specifications
      • Describes many protocols and functions needed to adapt the wireless Bluetooth technology to legacy and new applications
    • Protocol stack
    • Protocol stack
      • Radio: Specification of the air interface, i.e., frequencies, modulation, and transmit power
      • Baseband: Description of basic connection establishment, packet formats, timing, and basic QoS parameters
      • Link manager protocol: Link set-up and management between devices including security functions and parameter negotiation
      • Logical link control and adaptation protocol (L2CAP): Adaptation of higher layers to the baseband
    • Protocol stack
      • Service discovery protocol: Device discovery in close proximity plus querying of service characteristics
    • Radio layer
      • Factors :
      • Battery power
      • license-free frequency band at 2.4 GHz
      • A frequency-hopping/time-division duplex scheme
      • fast hopping rate of 1,600 hops per second
    • Radio layer
      • Power class 1: Maximum power is 100 mW and minimum is 1 mW (typ. 100 m range without obstacles). Power control is mandatory.
      • Power class 2: Maximum power is 2.5 mW, nominal power is 1 mW, and minimum power is 0.25 mW
      • (typ. 10 m range without obstacles). Power control is optional.
      • Power class 3: Maximum power is 1 mW.
    • Baseband layer
    • Packet Format
    • For Further reference
      • Wikipedia
      • Page 269 of Mobile Communications by Jochen Schiller