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Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
Short blutooth present
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Short blutooth present

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This topic of Bluetooth presentation is very useful in many communications.it can be very helpfull in various kind,just check it out you can get an idea

This topic of Bluetooth presentation is very useful in many communications.it can be very helpfull in various kind,just check it out you can get an idea

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  1. 1
  2.  Bluetooth is a packet based protocol with a master slave structure . One master may communicate with up to 7 slaves. In Bluetooth technology ,the device which sends the data is called as MASTER. Where as the devices that receive the data is called as SLAVE.
  3. BlueTooth- Some Specifications 4  Uses unlicensed 2.402 - 2.480 GHz frequency range.  Frequency hopping spread spectrum 79 hops separated by 1 MHz.  Maximum frequency hopping rate: 1600 hops/sec.  Nominal range: 10 cm to 10 meters.  Nominal antenna power: 0 dBm.  One complete Bluetooth data packet can be transmitted within each 625 msec hop slot.
  4. Potential Bluetooth Markets 5
  5. Bluetooth Market Forecast 9 Nov’03: 100M Bluetooth compliant devices worldwide
  6. Bluetooth Protocol Stack  Adopted Protocols  PPP(Point-To-Point Protocol)  TCP/UDP/IP  OBEX-Session Protocol for IrDA(Infrared Data Association)  Contents Format(e.g. vCard, vCalendar)  WAP-Wireless Application Protocol 11
  7. Bluetooth Security  Supports Unidirectional or Mutual Encryption based on a Secret Link key Shared Between Two Devices.  Security Defined In 3 modes: Mode1- No Security. Mode 2 - Service Level Security: Not Established Before Channel is Established at L2CAP. Mode 3 - Link Level Security: Device Initiates Security Before LMP Link is Setup. 13
  8. • Devices and Services can be Set for Different Levels of Security Two Trust Levels are Set for Devices: Trusted Device : Fixed Relationship and Unrestricted Access to All Services. Untrusted : No Permanent relationship and Restricted Services.
  9. Bluetooth Security  3 Levels of Service Access  Require Authorization and Authentication.  Require Authentication Only.  Default Security for Legacy Applications. 16
  10. But is this Wireless Link Secure? 18 Newsflash: Jan 2001: Norwegian “hackers” crack a Bluetooth transmission
  11. Bluetooth vs. the Rest (cont’d) 19 802.11 2.4 GHz, DSSS 11 chips/bit 11Mbps +20 dBm 50m 128 devices CSMA/CA Optional WEP Optional HomeRF 2.4GHz, FHSS 50 hops/s 1 Mbps +20 dBm 50m 128 devices CSMA/CA Optional Optional Bluetooth 2.4 GHz, FHSS 1000+hops/s 1Mbps 0, +20dBm 1-10m, 50m 8 devices, Piconet Encryption Yes Parameter Technology Data Rate Power Range Topology Security Voice Channel ZigBee (proposed) 2.4 GHz,DSSS 15 chips/bit 40 kbits/s 0dBm 100m 100s devices, CSMA/CA Not yet No Bluetooth – aka IEEE 802.15.1 Zig Bee – aka IEEE 802.15.4

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