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October 2009

October 2009. Car Communication Based on Bluetooth Links. Michael HERVE. Plan of the Presentation. Introduction Bluetooth Link Interest of Bluetooth for car communication Different phases of Bluetooth Hands-Free connection Improvements Conclusion. Introduction. Origin of Bluetooth

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October 2009

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  1. October 2009 Car Communication Based on Bluetooth Links Michael HERVE

  2. Plan of the Presentation • Introduction • Bluetooth Link • Interest of Bluetooth for car communication • Different phases of Bluetooth Hands-Free connection • Improvements • Conclusion

  3. Introduction • Origin of Bluetooth • Idea of universal compatibility • Wireless Link • Hands-Free systems • Interest of using Bluetooth for car communication

  4. Introduction • Bluetooth Link • Interest of Bluetooth for car communication • Different phases of Bluetooth Hands-Free connection • Improvements • Conclusion

  5. Bluetooth Link Mobile Network Link Bluetooth Link Bluetooth Device Mobile Phone

  6. Bluetooth Link Mobile Network Link Mobile Phone

  7. Bluetooth Link Mobile Network Link Bluetooth Link Bluetooth Device Mobile Phone

  8. Bluetooth Link Mobile Network Link Bluetooth Link Bluetooth Device Mobile Phone

  9. Bluetooth Coding sinus wave (440 Hz)

  10. Bluetooth Coding sinus wave (440 Hz) encoded by bluetooth

  11. Bluetooth General Information • Wireless Connection (2.4 Ghz) • Low Power (1mW for Hands Free) compare to 2W for GSM • Idea of universal compatibility • Wireless Link • Hands-Free systems • Interest of using Bluetooth for car communication

  12. Bluetooth Radio

  13. 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

  14. Introduction • Bluetooth Link • Interest of Bluetooth for car communication • Different phases of Bluetooth Hands-Free connection • Improvements • Conclusion

  15. 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

  16. 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

  17. Introduction • Bluetooth Link • Interest of Bluetooth for car communication • Different phases of Bluetooth Hands-Free connection • Improvements • Conclusion

  18. Different phases of Bluetooth Hands free kit connection Hello, I am looking for bluetooth devices Discovery Pairing Hello, I am an available Bluetooth device Detection of Profiles Connection Data Synchronisation

  19. Different phases of Bluetooth Hands free kit connection What is your authentification Code ? Discovery 1234… This code has to be typed on your keyboard Pairing Detection of Profiles Connection Ok ! Now we are paired Data Synchronisation

  20. Different phases of Bluetooth Hands free kit connection What type of profile do you support ? Discovery Pairing I can do headset and hands-free. What about you ? Detection of Profiles Connection Data Synchronisation

  21. Different phases of Bluetooth Hands free kit connection Discovery Pairing Ok, we are now connected in Hands-free. Detection of Profiles Connection I can do hands-free. Data Synchronisation

  22. Different phases of Bluetooth Hands free kit connection To complete my phonebook, I have to synchronise with your contacts Discovery Pairing Detection of Profiles Connection Ok, I transfer my 163 contacts. Data Synchronisation

  23. Alessandro Del Piero Gianluigi Buffon Fabio Cannavaro Fabio Grosso Tiago David Trezeguet Phonebook synchronisation • 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) Alessandro Del Piero Automatic Gianluigi Buffon Fabio Cannavaro Fabio Grosso Tiago David Trezeguet

  24. Introduction • Bluetooth Link • Interest of Bluetooth for car communication • Different phases of Bluetooth Hands-Free connection • Improvements • Conclusion

  25. Disabling phone algorithms Could you please disable your signal processing algorithms ? Ok !

  26. Disabling phone algorithms Could you please disable your signal processing algorithms ? No ! ??? Ok But in fact it’s a no !

  27. Disabling phone algorithms Initial noised signal No longer…

  28. Mobile phone with Gain 2 Common gain on the audio chain I can hear you very well … Telephony Network Mobile phone with Gain 1 Bluetooth Device I CANNOT HEAR YOU !

  29. Mobile phone with Gain 2 Common gain on the audio chain I can hear you very well … Telephony Network Mobile phone with Gain 1 Bluetooth Device I CANNOT HEAR YOU !

  30. Improvements: Bluetooth for wideband telephony… coming soon

  31. Introduction • Bluetooth Link • Interest of Bluetooth for car communication • Different phases of Bluetooth Hands-Free connection • Improvements • Conclusion

  32. Conclusion • Presentation of Bluetooth • Integration of Bluetooth in car communication • Limits and exemple of problems encountered • The future of Bluetooth

  33. Thank you ! QUESTIONS ?

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