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Transcript
BLUETOOTH A WAY TO WIRELESS COMMUNICATION 5/25/2017 1 Bluetooth Under Guidance: Prof. C.R.Mandal Presented By: Sourabh Gupta 05IT6016 Mtech (IT) School of Information Technology 5/25/2017 2 Outline • Introduction • Difference • Architecture • Communication • Problems • Conclusion 5/25/2017 3 Introduction • Bluetooth • Wireless communication • History 5/25/2017 4 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 5/25/2017 5 Difference • IEEE 802.11 • IrDA • Less range • Max speed 4Mb/s • Line of sight protocol 5/25/2017 6 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) 5/25/2017 7 Architecture Fig 1. Piconet [5] 5/25/2017 8 Fig 2 Scatternet [5] 5/25/2017 9 0 1 2 2.402 GHz 5/25/2017 78 f=2.402+nMHZ, n=0, 1…..., 78 Fig 3 Frequency Division [7] 2.480 GHz 10 5/25/2017 11 • 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 5/25/2017 12 Communication 5/25/2017 13 Problems • Bluejacking • Bluesnarfing • Bluespamming • Low data rate • Only point to point 5/25/2017 14 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. 5/25/2017 • Bluetooth supports both voice and data. • Bluetooth uses an unregulated frequency band 15 References • Computer Networks by A.S. Tanenbaum • www.sig.com • www.sig.org • www.techweb.com • Paper by Patricia McDermott-Wells 5/25/2017 16 References • www.ericcson.com • “Bluetooth” presentation by ZHE ZHU College of Technology, University of Houston • www.mobileinfo.com 5/25/2017 17
