Today, several proprietary radios enable
keyless entry and proximity sensor capabilities to unlock car doors or start
the ignition. But because these links are not based on standards, each
accessory must be compatible with the specific proprietary technology or it
will not work. Wireless SoCs that include Bluetooth Low Energy (LE)
capabilities, however, enable interoperability with all in-vehicle wireless
systems, allowing consumers to use any of their mobile accessories to open car
doors or start the ignition. The Bluetooth SIG has specified a standard
mechanism for streaming high-quality mono or stereo audio from a Bluetooth
master such as a smartphone to a slave device like an IVI system. The Advanced
Audio Distribution Profile (A2DP) encodes 2-channel audio in a
Bluetooth-friendly format, which is sent wirelessly and decoded at the
Bluetooth receiver. The SBC audio codec is a mandatory component of the A2DP
profile, but other industry standards and proprietary codecs can also be
accommodated. The dashboard so they can
answer calls and check text messages.
refer to: http://embedded-computing.com/articles/wireless-accelerate-next-wave-in-vehicle-innovation/