V2X Communication Synchronization via Control Channel
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Solution Overview
Problem
Current vehicle-to-X (V2X) communication systems face challenges in simultaneous message reception due to unsynchronized sending across multiple channels, leading to prolonged periods of message failure.
Innovation Solution
A communication apparatus that utilizes one channel, such as the control channel, for synchronization of multiple V2X channels, allowing simultaneous message transmission across multiple channels without the need for external synchronization, thereby enhancing channel utilization and reducing message latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If unsynchronized sending is used across multiple V2X channels, then device complexity is reduced, but message reception reliability deteriorates due to prolonged periods when the transmitter cannot receive messages
Solution Approach 1:
The patent combines the synchronization function with the existing control channel (CCH) transmissions. Instead of implementing a separate synchronization mechanism, the system merges synchronization information into the regular control channel messages that are already being transmitted, thereby reducing device complexity while improving message reception reliability across multiple V2X channels.
Solution Approach 2:
The control channel serves multiple functions simultaneously: it transmits control messages and provides synchronization information for other V2X channels. This multi-functionality eliminates the need for dedicated synchronization channels or mechanisms, reducing system complexity while ensuring reliable message reception across all channels.
2Reliability
If external synchronization sources are used for multiple V2X channels, then message reception reliability is improved, but device complexity and cost increase
Solution Approach 1:
The system uses its own control channel transmissions to provide synchronization information, eliminating the need for external synchronization sources. Each transmitter serves its own synchronization needs by embedding timing information in its control channel messages, thereby improving reliability without increasing device complexity or cost.
3Measurement precision
If precise absolute time synchronization is implemented across all V2X channels, then message transmission accuracy is improved, but system complexity and requirements increase
Solution Approach 1:
Instead of requiring precise absolute time synchronization across all channels, the patent implements local relative synchronization where each channel synchronizes to the control channel transmissions. This local approach provides sufficient timing accuracy for message transmission without the complexity of system-wide precise absolute time synchronization.
Solution Approach 2:
The system implements partial synchronization by using control channel transmissions as synchronization references only when needed, rather than maintaining continuous precise synchronization across all channels. This reduces the overall synchronization requirements and system complexity while maintaining adequate transmission accuracy.
Data Source
AI summary
A communication apparatus for vehicle-to-X communication (V2X communication), including a first interface for V2X communication on a first communication channel, a second interface for V2X communication on a second communication channel and a computing device for processing V2X messages received and/or to be sent. The apparatus is configured, initiated by the transmission of a first V2X message by the first interface, to transmit a second V2X message by the second interface. A corresponding method as well as the use of the communication apparatus in a vehicle or a mobile apparatus is also provided.