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has enabled Chrysler engineers to design a hands-free phone
system that can bridge the gap between consumer electronics
and vehicle applications. Now, as long as the primary link to
the external system (Bluetooth) remains consistent, vehicle
implementation is not affected by developments in the cellular
carrier industry or even the brand and/or form factor of the
phone. There is no need for phone-specific cradles hanging on
the dashboard or even an embedded cell phone in the vehicle.
Bluetooth is a wireless communication protocol that operates in
the 2.4 GHz frequency range. It is a frequency hopping scheme with
1600 hops per second over 79 channels, so that the chance of other
signals interfering is very low. Current specifications deliver gross
data rates of 1Mb/s over distances of up to 10 meters. Connections
for 1-to-1 applications allow maximum data-transfer rates of 721 kb/s.
Several profiles have been established to standardize such applications
as Hands Free Profile and Personal Area Network.
Potential vehicle applications include being able to:
• Use the phone legally in the vehicle (in states where a
hands-free device is mandated by law);
• Store phone anywhere inside the vehicle (glove compartment,
handbag or briefcase);
• Download and play music files through the radio;
• Use real-time traffic information for the GPS navigation system
to intelligently route around traffic jams and road closures;
Fig. 7: The UConnect system comprises a microphone array; a Bluetooth
module, enabled with voice recognition technology; and a Bluetoothenabled
cell phone.
• Obtain local information on hotels, restaurants and
other services;
• Perform remote vehicle diagnostics for production line test
and dealer service;
• Deliver Internet content to a multi-function portal;
• Establish bridge among 2.5G/3G data services, enabling
audio and data over a wireless personal area networking
(WPAN), driving down overall system cost; and
• Eliminate obsolescence by no longer requiring a mobile
phone to be embedded in the vehicle.
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