Alarm system for use in vehicle, has communication device for transmitting alarm signal, and receiving unit for receiving interfering signal that affects performance of communication unit for transmitting alarm signal

摘要

The system has a communication device (1) for transmitting an alarm signal. A receiving unit (2) is provided for receiving interfering signal that affects the performance of the communication unit for transmitting the alarm signal. Another communication device (3) is different from the communication device (1) for transmitting the alarm signal during receiving the interfering signal. An independent claim is also included for an alarm procedure.