V2X Group Identifier Feedback for Spectral Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current V2X broadcasting technologies face challenges in efficiently transmitting data between vehicles without knowing the receiving equipment's identity, leading to reduced spectral efficiency and increased resource allocation for error detection, especially in dynamic platoon formations.
Innovation Solution
A method using a group identifier to facilitate data broadcasting and error acknowledgement between transmission and receiving equipment, leveraging a base station to manage time-frequency resources and implement a common mathematical sequence for error detection, allowing for flexible platoon changes and reduced data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a highly robust Modulation and Coding Scheme (MCS) is used to code and modulate the radio signal for data broadcasting, then the reception reliability of data by receiving equipments is improved, but the spectral efficiency of the radio signal is reduced
Solution Approach 1:
The patent implements a feedback mechanism where receiving equipments send acknowledgment messages back to the transmission equipment indicating whether data was received correctly. This feedback allows the transmission equipment to use less robust MCS initially and only increase robustness when negative acknowledgments are received, thus maintaining spectral efficiency while ensuring reception reliability.
Solution Approach 2:
The patent dynamically changes the MCS parameters based on reception feedback. Instead of using a fixed highly robust MCS, the system adjusts modulation and coding parameters according to actual reception conditions and feedback from receiving equipments, optimizing the balance between reliability and spectral efficiency.
2Reliability
If the transmission equipment uses a highly robust Modulation and Coding Scheme (MCS) to ensure data reception, then the data reception quality is improved, but the resource allocation for transmission increases
Solution Approach 1:
Through the feedback mechanism where receiving equipments send reception status messages, the transmission equipment can allocate resources efficiently. Instead of always using excessive resources for highly robust transmission, resources are allocated dynamically based on actual reception needs indicated by feedback messages.
Solution Approach 2:
The patent applies partial action by using just enough robustness in MCS to achieve reliable reception. Instead of always applying excessive robustness, the system uses the minimum necessary protection level based on feedback, reducing unnecessary resource consumption while maintaining reception quality.
3Adaptability or versatility
If the transmission equipment broadcasts data without knowing the receiving equipments' identity, then the broadcasting flexibility is improved, but the ability to optimize transmission for specific receivers is reduced
Solution Approach 1:
The patent introduces an intermediary mechanism through group identifiers and feedback messages. The transmission equipment broadcasts to all receiving equipments using a group identifier rather than individual addresses, maintaining flexibility. Meanwhile, feedback messages serve as intermediaries that carry reception status information back to the transmitter, enabling optimization without requiring the transmitter to know individual receiver identities in advance.
Data Source
AI summary
In a vehicle to anything environment, in order to achieve good data reception, receiving equipment and transmission equipment are preconfigured and thus include all the parameters needed for data transmission. In order to increase the probability of the data being received by the receiving equipment, the transmission equipment uses a highly robust modulation and coding scheme to code and modulate the radio signal used to broadcast the data. However, the more robust the implemented modulation and coding scheme, the lower the spectral efficiency of the radio signal used for transmission. User equipments belonging to the same broadcast group are identified by means of an identifier of the broadcast group, which allows for the implementation of a mechanism of acknowledgement by the receiving equipments making it possible to inform the transmission equipment that an error has occurred in the reception of the broadcast data.