METHOD FOR TRANSMITTING AN URGENT MESSAGE FROM A TRANSMITTING VEHICLE TO AT LEAST ONE RECEIVING VEHICLE VIA A RADIO NETWORK, AND MOTOR VEHICLE, TRANSMITTING CIRCUIT AND RECEIVING CIRCUIT

Abstract

The present disclosure relates to a method for transmitting an urgent message from a transmitting vehicle to at least one receiving vehicle via a radio network, while a normal message is already output in a radio channel of the radio network by a subscriber of the radio network that is different from the transmitting vehicle. In the method a transmitting circuit of the transmitting vehicle transmits the urgent message in the radio channel with a transmission level which is lower than a transmission level (40) of the normal message, and an associated receiving circuit of the at least one receiving vehicle receives from the radio channel a superimposition signal containing the normal message and the urgent message and extracts the normal message from the superimposition signal, determines a residual signal describing a difference between the superimposition signal and the extracted normal message, and reconstructs the urgent message on the basis of the residual signal.

Description

Claims

1-8. (canceled)

9. A method comprising: emitting, by a transmitting circuit of a transmitting vehicle, an urgent message in a radio channel with a transmission level that is less than a transmission level of a normal message, wherein the transmission level of the urgent message is adjusted by controlling a modem of the transmitting circuit and/or by switching off an antenna compensation circuit;receiving, from the radio channel, by a respective receiving circuit of at least one receiving vehicle, a superimposition signal that includes a normal message and the urgent message;reconstructing the normal message from the superimposition signal;modeling a signal portion of the normal message in the superimposition signal based on the reconstructed normal message;ascertaining a residual signal based on the superimposition signal and the modeled signal portion of the normal message, wherein the residual signal describes a difference between the superimposition signal and the modeled signal portion; andreconstructing the urgent message based on the residual signal,wherein the normal message is emitted in the radio channel by a subscriber of the radio network that is different from the transmitting vehicle.

10. The method of claim 9, further comprising: reproducing a transmitting signal of the subscriber for modeling the signal portion from message data of the reconstructed normal message; andadapting the reproduced transmitting signal to a reception level of the superimposition signal at the receiving circuit to ascertain the signal portion.

11. The method of claim 9, wherein the normal message is transmitted in a preset time slot of a synchronous data transfer in the radio network, the method further comprising: transmitting, by the transmitting circuit, the urgent message with a predetermined time offset with respect to a start point of time of the preset time slot; anddetermining, by the receiving circuit, if the urgent message is included in the superposition signal by examining a signal section in the superposition signal for a presence of a predetermined header of a possible urgent message, wherein the signal section corresponds to the start point of time of the preset time slot plus the predetermined time offset.

12. The method of claim 9, wherein transmitting the normal message uses multiple modulation coding schemes or a numerology concept, and wherein transmitting the urgent message uses coding with a greatest redundancy scheme or a rateless coding scheme.

13. The method of claim 9, wherein the transmission level of the urgent message is adjusted lower than the transmission level of the normal message by a factor of 6 decibels to 10 decibels.

14. The method of claim 9, wherein the transmitting vehicle and the at least one receiving vehicle operate the radio network as an ad-hoc network for a cooperative driving operation, and wherein the urgent message indicates that the transmitting vehicle terminates the cooperative driving operation or leaves the ad-hoc network.

15. A transmitting circuit for a motor vehicle, wherein the transmitting circuit comprises a control device that is configured to: emit a message identified as urgent into a radio channel of a radio network;detect whether the radio channel is occupied by a transfer of a normal message of another subscriber;when the normal message of another subscriber is detected as occupying the radio channel, emit the message as an urgent message in the radio channel with a transmission level that is less than a transmission level of the normal message; andadjust the transmission level of the urgent message by controlling a modem of the transmitting circuit, and/or by switching off an antenna compensation circuit.

16. A motor vehicle comprising a transmitting circuit, wherein the transmitting circuit comprises a control device that is configured to: emit a message identified as urgent into a radio channel of a radio network;detect whether the radio channel is occupied by a transfer of a normal message of another subscriber;when the normal message of another subscriber is detected as occupying the radio channel, emit the message as an urgent message in the radio channel with a transmission level that is less than a transmission level of the normal message; andadjust the transmission level of the urgent message by controlling a modem of the transmitting circuit, and/or by switching off an antenna compensation circuit.