Transcript Bluetooth - School of Information Technology, IIT kharagpur

BLUETOOTH
A WAY TO WIRELESS COMMUNICATION
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Bluetooth
Under Guidance:
Prof. C.R.Mandal
Presented By:
Sourabh Gupta
05IT6016
Mtech (IT)
School of Information Technology
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Outline
• Introduction
• Difference
• Architecture
• Communication
• Problems
• Conclusion
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Introduction
• Bluetooth
• Wireless communication
• History
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Specification of Bluetooth
• Operates at 2.4 Ghz
• 79 Channels
• Uses FHSS, GFSK modulation
• 1600 hops/sec
• Can have 8 devices in a piconet
• Non line of sight
• Low cost, Short range
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Difference
• IEEE 802.11
• IrDA
• Less range
• Max speed 4Mb/s
• Line of sight protocol
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Comparison
Peak Data Rate
Range
Relative Cost
Voice network support
Data network
support
IEEE 802.11
2 Mbps
50m
Medium
Via IP
TCP / IP
IrDA
16 Mbps
< 2m
Low
Via IP
Via PPP
Bluetooth
1 Mbps
< 10m
Medium
Via IP and cellular
Via PPP
Home RF
1.6 Mbps
50m
Medium
Via IP and PSTN
TCP / IP
Table 1: (ref -> www.mobileinfo.com)
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Architecture
Fig 1. Piconet [5]
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Fig 2 Scatternet [5]
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0 1 2
2.402 GHz
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f=2.402+nMHZ, n=0, 1…..., 78
Fig 3 Frequency Division [7]
2.480 GHz
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• Radio Layer: Design of Bluetooth
transceivers.
• Baseband Layer:
• SCO
• ACL
Link Management Layer: manages the
properties of the air interface link between
device
L2CAP: provides the interface between the
higher- layer protocols
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Communication
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Problems
• Bluejacking
• Bluesnarfing
• Bluespamming
• Low data rate
• Only point to point
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Conclusion
Bluetooth technology encompasses several
key points that facilitate its widespread
adoption:
• Its specification is publicly available and
free .
• Its short-range wireless capability allows
peripheral devices to communicate
replacing cables that use connectors.
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Bluetooth supports both voice and data.
•
Bluetooth uses an unregulated frequency
band
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References
• Computer Networks by A.S. Tanenbaum
• www.sig.com
• www.sig.org
• www.techweb.com
• Paper by Patricia McDermott-Wells
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References
• www.ericcson.com
• “Bluetooth” presentation by ZHE
ZHU College of Technology,
University of Houston
• www.mobileinfo.com
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