Shared V2X Antenna Switching Between DSRC and C-V2X
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Solution Overview
Problem
Existing V2X communication technologies, such as DSRC and C-V2X, often require separate antennas when used simultaneously, leading to performance degradation due to mutual interference, and there is a need for a solution that can efficiently switch between these technologies to improve communication performance.
Innovation Solution
An electronic device mounted on a vehicle that supports both DSRC and C-V2X technologies using a shared antenna, with a processor controlling a switch to connect either the DSRC or C-V2X module to the antenna, allowing for efficient switching between the two technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate antennas are used for DSRC and C-V2X modules, then communication reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the antenna resources of DSRC and C-V2X modules by introducing a switch that dynamically allocates a shared antenna to different modules based on communication requirements. This combining approach reduces the total number of antennas from two to one, thereby reducing device complexity and cost while maintaining communication reliability through dynamic resource allocation.
Solution Approach 2:
The patent makes the antenna universal by enabling it to serve both DSRC and C-V2X communication functions through the switch mechanism. The same physical antenna can be dynamically assigned to different communication protocols based on real-time needs, achieving multi-functionality and eliminating the need for dedicated antennas for each module.
2Reliability
If separate antennas are used for DSRC and C-V2X modules, then communication performance is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines antenna resources to reduce the bill of materials and manufacturing cost. By using one shared antenna instead of two separate antennas and implementing a switch-based allocation system, the overall manufacturing cost is reduced while communication performance is maintained through dynamic resource assignment.
3Device complexity
If a shared antenna is used for DSRC and C-V2X modules, then device complexity is reduced, but communication reliability deteriorates due to mutual interference
Solution Approach 1:
The patent introduces dynamic switching between DSRC and C-V2X modules based on real-time communication requirements. The switch dynamically allocates the shared antenna to the active module, preventing simultaneous operation that would cause interference. This dynamic resource allocation maintains communication reliability while reducing device complexity.
Solution Approach 2:
The switch acts as an intermediary between the shared antenna and the communication modules. It mediates access to the antenna by selectively connecting it to either the DSRC or C-V2X module based on current communication needs, thereby preventing mutual interference while enabling resource sharing.
4Ease of manufacture
If a shared antenna is used for DSRC and C-V2X modules, then manufacturing cost is reduced, but communication performance deteriorates due to interference
Solution Approach 1:
The patent implements dynamic switching to prevent simultaneous transmission and reception on the shared antenna. By actively managing antenna allocation based on real-time communication demands, the system avoids interference-related performance degradation while benefiting from the reduced manufacturing cost of using fewer antennas.
Data Source
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Figure 3A~3B
AI summary
Provided are an electronic device for supporting vehicle-to-everything (V2X) communication on which an autonomous driving vehicle technology, a cooperative-intelligent transport systems (C-ITS) technology, etc. are based and an operation method of the electric device. The electronic device mounted to a vehicle to support wireless mobile communication for the vehicle includes: a dedicated short range communication (DSRC) module configured to perform wireless communication by using DSRC technology; a cellular V2X (C-V2X) module configured to perform wireless communication by using C-V2X technology; an antenna; and a processor configured to control a switch to connect one of the DSRC module and the C-V2X module to the antenna.