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Copyright CSR plc 2008 Robin Heydon
Bluetooth low energyRobin Heydon, CSR plc
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Copyright CSR plc 2008 Robin Heydon
What is Bluetooth?
Bluetooth is:
worldwide registered / protected trademarkrecognised brand
a standard
Very successful
~2.5 billion devices
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Copyright CSR plc 2008 Robin Heydon
What is Bluetooth?
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thesis
all widely successful technologies will be usedin other unintended applications
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other applications for Bluetooth
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other applications for Bluetooth
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tip ?
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Bluetooth low energy
Kept
Adaptive Frequency HoppingL2CAP multiplexing layer
Profiles and Protocol concepts
Proven Qualification System
Profile Testing System
Unplugfests
Changed
Acknowledgement SchLower Power Connect
Faster Data Transaction
Star-Bus topology
Longer Range
More Devices in Picon
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Copyright CSR plc 2008 Robin Heydon
who is low energy ?
7 layersAnritsu
AT4 Wirelesss
Frontline
IVT
Rhode & Schwarz
AccelAtheros
Broadcom
CSR
Cypress
EM Micro
Infineon
ISSC
MarvellNordic
NXP
Qualcomm
SiRF
ST Micro
Texas Inst
Toshiba
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Copyright CSR plc 2008 Robin Heydon
Architecture
Bluetooth Chip
L2CAP (multiplexing)
Attribute Protocol
Attribute Profile
Sensor Profile
Meter Service Class
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Copyright CSR plc 2008 Robin Heydon
Some numbers...
Number of devices active within a network = 4000
Number of devices able to be connected within an area = unlimited
Max power draw = < 15 mA (suitable for coin cell battery)
Signal topology = Star
Real topology = Star Bus
Data rate (physical) = 1 Mb/sData rate (application) = ~200 kb/s
Range (raw) = ~50 meters
Range (LNA/PA) = ~500 meters
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Copyright CSR plc 2008 Robin Heydon
Students !!!
http://www-control.eng.cam.ac.uk/~pcr20/papers/PEMD2004.pdf
http://www-control.eng.cam.ac.uk/~pcr20/papers/PEMD2004.pdfhttp://www-control.eng.cam.ac.uk/~pcr20/papers/PEMD2004.pdf8/14/2019 ERA Local Comms Bluetooth low energy 0209
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Copyright CSR plc 2008 Robin Heydon
Bluetooth Robust?
Narrow Band Signals
Adaptive Frequency Hopping
Forward Error Correction
Fast Acknowledgment
Cyclic Redundancy Checks at Radio
Additional CRCs at L2CAP (optional)
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Bluetooth longevity
Bluetooth SIG : 1998
Working Specification : 2001
Automotive Industry require 10 year life for chips
Harsh Environment
Temperature / Vibrations
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Copyright CSR plc 2008 Robin Heydon
Cost ?
Bluetooth today:
2008 ASP = US$1.60 (0.89)
2012 ASP = US$1.20 (0.67)
Bluetooth low energy:
Expected to be 50% below price
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Volume ?
Bluetooth today:
1 Billion chips / year
Goal:
2 Billion chips / year
15 million chips a year...Bluetooth enabled portable media players
Bluetooth automation market
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Copyright CSR plc 2008 Robin Heydon
Summary
Bluetooth low energy can meet requirements for Metering
Robust / Low Power / Star-Bus
Industry support is extensive
Test / Silicon Vendors / Software / System Integration
Security issues need to be addressed
Cant rely on security of physical channel
Bluetooth does vertical solutions - can help you solve this
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Copyright CSR plc 2008 Robin Heydon
thank you
Robin Heydon
Global Standards - CTO Office
CSR plc
Churchill HouseCambridge Business ParkCowley RoadCambridge, CB4 0WZUnited Kingdom
www.csrsupport.com
Mobile: +44 (0)7795 035468Switchboard: +44 (0)1223 692000
Fax: +44 (0)1223 692001
http://www.csrsupport.com/http://www.csrsupport.com/http://www.csr.com/http://www.csr.com/mailto:[email protected]:[email protected]
