Urgent Message Transmission via Signal Superposition
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Solution Overview
Problem
In vehicle-to-vehicle communication networks, urgent messages are often delayed due to occupied radio channels, as existing systems require a free channel for transmission, leading to disruptions in coordinated driving maneuvers during critical situations.
Innovation Solution
The method involves transmitting urgent messages with a lower signal level than normal messages, allowing them to be superimposed on existing signals in the same radio channel, enabling their reconstruction by receiving vehicles despite channel occupancy, using a modem control and antenna compensation to adjust transmission levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radio channel is occupied by normal message transmission, then the channel is utilized for standard communication, but urgent messages experience transmission delays
Solution Approach 1:
The patent merges urgent message transmission with ongoing normal message transmission by allowing both signals to occupy the same radio channel simultaneously. The urgent message is superimposed on the normal message signal, enabling concurrent transmission without requiring channel release, thus eliminating delays while maintaining channel utilization.
Solution Approach 2:
The patent changes the transmission parameter (signal level/power) of the urgent message to be lower than that of normal messages. This parameter adjustment allows the urgent message to be transmitted during channel occupancy without completely overpowering the normal message, enabling receivers to distinguish and process both signals appropriately.
2Productivity
If urgent messages are transmitted with lower signal level, then they can be superimposed on existing signals without complete channel release, but the signal strength is reduced
Solution Approach 1:
The patent applies local quality by transmitting the urgent message with a locally reduced signal level specifically during channel occupancy periods, while normal messages maintain their standard signal level. This localized parameter adjustment allows urgent messages to coexist with normal traffic without requiring full power transmission, balancing communication efficiency with signal strength requirements.
3Reliability
If the system waits for the radio channel to become free before transmitting urgent messages, then normal communication protocols are maintained, but critical information delivery is delayed
Solution Approach 1:
The patent introduces dynamic transmission behavior where the system adapts its communication protocol based on message urgency. For urgent messages, the system dynamically overrides the standard wait-for-free-channel protocol, allowing transmission during occupied channels. This dynamic adjustment prioritizes critical information delivery while maintaining protocol compliance for normal communications.
Data Source
AI summary
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.