Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin October...
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Transcript of Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin October...
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
October 2009
Car Communication Based on Bluetooth Links
Michael HERVE
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Plan of the Presentation
Introduction
Bluetooth Link
Interest of Bluetooth for car communication
Different phases of Bluetooth Hands-Free connection
Improvements
Conclusion
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Origin of Bluetooth
Idea of universal compatibilityWireless LinkHands-Free systems Interest of using Bluetooth for car communication
Introduction
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Introduction
Bluetooth LinkInterest of Bluetooth for car communication
Different phases of Bluetooth Hands-Free connection
Improvements
Conclusion
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Bluetooth Link
Mobile Network Link
Mobile PhoneBluetooth Device
Bluetooth Link
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Bluetooth Link
Mobile Network Link
Mobile Phone
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Bluetooth Link
Mobile Network Link
Mobile PhoneBluetooth Device
Bluetooth Link
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Bluetooth Link
Mobile Network Link
Mobile PhoneBluetooth Device
Bluetooth Link
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Bluetooth Coding
sinus wave (440 Hz)
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Bluetooth Coding
sinus wave (440 Hz) encoded by bluetooth
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Bluetooth General Information
Wireless Connection (2.4 Ghz) Low Power (1mW for Hands Free) compare to 2W for GSM
Idea of universal compatibilityWireless LinkHands-Free systems Interest of using Bluetooth for car communication
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Bluetooth Radio
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Bluetooth profiles
What is a profile ?Interface specification for communication between devices
Large range of services for bluetooth devices (Hands-free, A2DP (audio streaming), File Transfert, Printer, IRMC, …)
Devices must be able to know which profiles are in commun with devices that want to be connected with.
Discovery Protocol
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Introduction
Bluetooth Link
Interest of Bluetooth for car communicationDifferent phases of Bluetooth Hands-Free connection
Improvements
Conclusion
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Interest of Bluetooth for car
Enable the connection with different phones (for the different users of the car)
No Harware/cable is needed
High compatibility between phone and the device
Phonebook synchronisation Ringtone Volume Accept/Refuse call Discret Mode DTMF
Software can be updated easily
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Interest of Bluetooth for car
Security Reasons
Goal : having all phone functionnalities with an easier HMI (Human to Machine Interface)
Hands must be substituted by the voice
Bluetooth allows universal links with most of the phones
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Introduction
Bluetooth Link
Interest of Bluetooth for car communication
Different phases of Bluetooth Hands-Free connectionImprovements
Conclusion
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Different phases of Bluetooth Hands free kit connection
Discovery
Pairing
Detection of Profiles
Connection
Data Synchronisation
Hello, I am looking for bluetooth devices
Hello, I am an available Bluetooth
device
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Different phases of Bluetooth Hands free kit connection
Discovery
Pairing
Detection of Profiles
Connection
Data Synchronisation
What is your authentification
Code ?
1234…This code has to be typed on your keyboard
Ok !Now we are
paired
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Different phases of Bluetooth Hands free kit connection
Discovery
Pairing
Detection of Profiles
Connection
Data Synchronisation
What type of profile do you
support ?
I can do headset and hands-free.
What about you ?
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Different phases of Bluetooth Hands free kit connection
Discovery
Pairing
Detection of Profiles
Connection
Data Synchronisation
Ok, we are now connected in Hands-free.
I can do hands-free.
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Different phases of Bluetooth Hands free kit connection
Discovery
Pairing
Detection of Profiles
Connection
Data Synchronisation
To complete my phonebook,
I have to synchronise
with your contacts
Ok, I transfer my 163
contacts.
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
The Hands Free synchronizes its phonebook with the contacts on the mobile phone.
The phonebook is vocally available at any time through Voice Recognition, Text To Speech & Voice Tags.
Synchronisation is done only once (at first connection)
Phonebook synchronisation
AutomaticAlessandro Del PieroGianluigi BuffonFabio CannavaroFabio GrossoTiagoDavid Trezeguet
Alessandro Del Piero
Gianluigi Buffon
Fabio Cannavaro
Fabio Grosso
Tiago
David Trezeguet
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Introduction
Bluetooth Link
Interest of Bluetooth for car communication
Different phases of Bluetooth Hands-Free connection
ImprovementsConclusion
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Disabling phone algorithms
Could you please disable
your signal processing
algorithms ?
Ok !
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Disabling phone algorithms
Could you please disable
your signal processing
algorithms ?
No !
???Ok
But in fact it’s a no !
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Initial noised signal
Disabling phone algorithms
No longer…
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Common gain on the audio chain
Bluetooth Device
Telephony Network
Mobile phone with Gain 1
Mobile phone with Gain 2
0 1 2 3 4 5 6
x 104
-1.5
-1
-0.5
0
0.5
1
1.5x 10
4
time
mag
nitu
de
0 1 2 3 4 5 6
x 104
-1.5
-1
-0.5
0
0.5
1
1.5x 10
4
time
mag
nitu
de
0 1 2 3 4 5 6
x 104
-1.5
-1
-0.5
0
0.5
1
1.5x 10
4
time
mag
nitu
de
I can hear you very well …
I CANNOT HEAR YOU
!
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Common gain on the audio chain
Bluetooth Device
Telephony Network
Mobile phone with Gain 1
Mobile phone with Gain 2
0 1 2 3 4 5 6
x 104
-1.5
-1
-0.5
0
0.5
1
1.5x 10
4
time
mag
nitu
de
0 1 2 3 4 5 6
x 104
-1.5
-1
-0.5
0
0.5
1
1.5x 10
4
time
mag
nitu
de
0 1 2 3 4 5 6
x 104
-1.5
-1
-0.5
0
0.5
1
1.5x 10
4
time
mag
nitu
de
I can hear you very well …
I CANNOT HEAR YOU
!
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Improvements: Bluetooth for wideband telephony… coming soon
NarrowBand WideBand
speech signal
Encoded via Bluetooth
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Introduction
Bluetooth Link
Interest of Bluetooth for car communication
Different phases of Bluetooth Hands-Free connection
Improvements
Conclusion
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Conclusion
Presentation of BluetoothIntegration of Bluetooth in car communicationLimits and exemple of problems encounteredThe future of Bluetooth
Car Communication based on Bluetooth Links ITN, 15-16 October 2009, Lingotto Fiere, Turin
Thank you !
QUESTIONS ?