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Car-to-X communication system, participant in such a system, and method for receiving radio signals in such a system

  • US 9,031,499 B2
  • Filed: 08/11/2012
  • Issued: 05/12/2015
  • Est. Priority Date: 10/20/2011
  • Status: Active Grant
First Claim
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1. A Car-2-X communications system, comprising:

  • at least first and second users, whereinthe first user comprises;

    a first communications unit to receive messages from the second user of the communications system and to send messages to the second user of the communications system;

    a first radio receiver to receive radio signals with a first reception quality; and

    a first control unit coupled to the first communications unit and to the first radio receiver,the first control unit is configured to monitor the first reception quality and generate a request message if the first reception quality is less than a predetermined first threshold value, the request message requesting receipt of radio signals via the first communications unit,the first communications unit sends the request message,the first communications unit receives from the second user an offer message, which specifies a second reception quality at which radio signals are received by the second user,the first control unit is configured to evaluate the second user as a potential communication partner based on the offer message,the first control unit is configured to generate a response message if the second user is selected as the communication partner, the response message notifying the second user regarding a connection to the second user for transmitting radio signals received by the second user,the first communication unit sends the response message to the second user,the first control unit is configured to establish the connection to the second user by way of the first communications unit, to receive forwarded radio signals from the second user,the first control unit is configured to route the forwarded radio signals to the first radio receiver and instruct the first radio receiver to substitute the forwarded radio signals for the radio signals having the first reception quality;

    the second user comprises;

    a second communications unit to receive messages from the first user and to send messages to the first user;

    a second radio receiver to receive radio signals with the second reception quality; and

    a second control unit coupled to the second communications unit and to the second radio receiver,the second communications unit receives the request message from the first user,the second control unit is configured to monitor the second reception quality, and if the second reception quality is greater than or equal to a predetermined second threshold value, to send the offer message to the first user by way of the second communications unit,the second control unit is configured to establish the connection with the first user by way of the second communications unit, if the second communications unit receives the response message, andthe second control unit is configured to transmit, as the forwarded radio signals, the radio signals received by the second radio receiver, the forwarded radio signals being transmitted to the first user.

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