Presentation is loading. Please wait.

Presentation is loading. Please wait.

University of Eastern Finland School of Computing P.O. Box 111 FIN- 80101 Joensuu Tel. +358 13 251 7959 fax +358 13 251 7955 www.uef.fi/cs Bluetooth Mikko.

Similar presentations


Presentation on theme: "University of Eastern Finland School of Computing P.O. Box 111 FIN- 80101 Joensuu Tel. +358 13 251 7959 fax +358 13 251 7955 www.uef.fi/cs Bluetooth Mikko."— Presentation transcript:

1 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Bluetooth Mikko Malinen Location-aware mobile applications development course University of Eastern Finland 8th February, 2011

2 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Definition Bluetooth is an open wireless technology standard for exchanging data over short distances (using short wavelength radio transmissions) from fixed and mobile devices.

3 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Bluetooth is created by Ericsson in Today Bluetooth is managed by the Bluetooth Special Interest Group, with a membership of over companies worldwide.

4 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Logo comes from medieval King Harald’s initials: +

5 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Modulation Originally GFSK Bluetooth 2.0+EDR π/4-DQPSK 8DPSK

6 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax One master may communicate with 7 slaves. Master transmits in even slots and receives in odd slots. Slave receives in even slots and transmits in odd slots.

7 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax It is a secure way to transmit information between devices such as faxes, mobile phones, telephones, laptops, personal computers, printers, GPS receivers, digital cameras, and video game consoles. Mobile phone headset.

8 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Range

9 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Throughput

10 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Bluetooth vs. WiFi WiFi uses the same radio frequencies as Bluetooth, but with higher power, resulting in faster connection and a better range from a base station.

11 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Computer requirements Internal Bluetooth card or a dongle. Internal Bluetooth card. A dongle.

12 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Mobile phone requirements A Bluetooth-enabled mobile phone.

13 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Bluetooth versions v1.1 v1.2 v2.0+EDR v2.1+EDR v3.0+HS High speed. negotiation Bluetooth device data transfer link v4.0 Ultra-low power

14 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Layer protocol architecture TCP/IP/UDP included! Mandatory protocols: LMP, L2CAP, SDP Also almost universally supported: HCI, RFCOMM

15 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Error correction implemented •1/3 rate forward error correction (FEC) •2/3 rate FEC •Automatic repeat-request (ARQ)

16 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Pairing Legacy pairing, ->v2.0: Enter same pin code to both devices Secure simple pairing, v2.1: Uses a form of public key cryptography ”Just works” or key comparison

17 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Air interface GHz, divided to 79 channels, change channels up to 1600 times per second.

18 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Health concerns Class 2 and Class 3 Bluetooth devices are considered less of a potential hazard than mobile phones, and class 1 may be comparable to that of mobile phones.

19 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Bluetooth Sample Code apps for Android pplications/bluetooth%20sample%20c ode

20 University of Eastern Finland School of Computing P.O. Box 111 FIN Joensuu Tel fax Sources: Wikipedia


Download ppt "University of Eastern Finland School of Computing P.O. Box 111 FIN- 80101 Joensuu Tel. +358 13 251 7959 fax +358 13 251 7955 www.uef.fi/cs Bluetooth Mikko."

Similar presentations


Ads by Google