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

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.

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.

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

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

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.

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.

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

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

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.

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.

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

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

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

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)

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

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.

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.

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

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