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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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.

4. BlueTooth- Some Specifications
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 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.

5. Potential Bluetooth Markets
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9. Bluetooth Market Forecast
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Nov’03: 100M Bluetooth compliant devices worldwide

11. 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
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13. 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.
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14. • 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.

16. Bluetooth Security
 3 Levels of Service Access
 Require Authorization and Authentication.
 Require Authentication Only.
 Default Security for Legacy Applications.
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18. But is this Wireless Link Secure?
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Newsflash: Jan 2001: Norwegian “hackers” crack a
Bluetooth transmission

19. Bluetooth vs. the Rest (cont’d)
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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