Bluetooth Vishwas Sundaramurthy

Low-cost, short range, small form-factor radio linksAdhoc networks/links between information appliances

History

Usage Scenarios Automatic backup synchronization Connect peripherals to PC / LAN E-mail synchronization Hands-free phone Instant photos Interactive conference Ubiquitous internet access

Three in One Phone

Automatic Backup Synchronization

Connect Peripherals to PC / LAN

E-mail Synchronization

Hands-free Phone

Instant Photos and Video Clips

Interactive Conference

Ubiquitous Internet Access

Overview Allows replacement of proprietary cables Adhoc grouping (piconets) Combination of circuit and packet

switching Avoids interference using freq hopping

spread spectrum and FEC Asynchronous connectionless - data

channel (721/57.6kb/s) Synchronous connection oriented - voice

(432 kb/s)

Radio Interface 1mb/s raw throughput (actual 728 kb/s) 2.402 GHz to 2.480 GHz, frequency

hopping 79 hops displaced by 1 MHz

RF output signal power of 1 mw (0 dBm, class 3) up to 100 mw

10 meters in low-power standard (100 in high)

Time Division Duplex

Bluetooth Link Manager Link setup, authentication, link

configuration protocols Discover remote LMs Naming/authentication Connection setup Link modes (voice/data)

Bluetooth Topology

Bluetooth Baseband Each packet (0.635 s) in a different

hop freq (1600 hops/s). Link establishment Standby/sniff/park/hold mode Link types

Synchronous connection oriented (SCO) asynch connection-less (ACL)

Error correction 1/3 FEC, 2/3 FEC and ARQ

Form Factor

Ericsson Bluetooth Module Ericsson Bluetooth Radio

Sources www.bluetooth.net www.bluetooth.com bluetooth.ericsson.se www.nokia.com/phones/bluetooth