System allowing hands free use of a mobile phone in conjunction with a vehicle transceiver

摘要

A communications system for a motor vehicle in which the hands-free device for a mobile phone is integrated into an audio or information system of the motor vehicle such as a car radio. The voice and/or data transmission between the mobile phone and the hands-free device takes place over an additional short-range radio link. A transceiver for this short-range radio link is contained both in the car radio and in the mobile phone. The need to install additional connection interfaces is thus eliminated. In addition, the need to couple the mobile phone to the hands-free device using a cable is eliminated. This has the advantage that the mobile phone can remain, for example, in the driver's pocket. The coupling between the mobile phone and car radio occurs automatically if the mobile phone moves into the range of the short-range radio link of the car radio.