Post on 23-Feb-2016
description
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