V2X Unit Wireless Data Exchange with Control Devices
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Solution Overview
Problem
Current vehicle systems require expensive high-speed bus systems like Ethernet for data transmission between V2X units and control units, which is costly and inefficient, especially when different bandwidth requirements for V2X and WLAN communication are not met, and separate interfaces are needed for data distribution within the vehicle.
Innovation Solution
A vehicle system that uses a wireless communication module in the V2X unit to establish a direct wireless connection with the control unit for non-V2X relevant data transfer, eliminating the need for separate Ethernet interfaces and allowing the use of existing interfaces like CAN or CAN FD for V2X data, with the option to activate a data transmission mode based on vehicle status, using WLAN or Bluetooth for data exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a high-speed bus system like Ethernet is used for data transmission between V2X units and control units, then data transmission speed is improved, but system cost and complexity increase
Solution Approach 1:
The system dynamically switches between different communication modes (WLAN infrastructure mode for high-speed data transfer, WLAN ad-hoc mode for V2X communication, and Bluetooth Low Energy for low-bandwidth applications) based on real-time requirements, allowing the communication architecture to adapt its speed and complexity characteristics to match actual needs
2Productivity
If separate Ethernet interfaces are provided for data transmission to control units, then data transmission capability is improved, but system cost increases
Solution Approach 1:
The V2X unit is designed with multi-functional communication capabilities, using a single integrated unit that can perform V2X communication, infotainment data transfer, and general data exchange with control units through different wireless modes, eliminating the need for separate Ethernet interfaces and reducing overall system cost
3Productivity
If WLAN is used for data transfer instead of V2X communication, then bandwidth utilization is improved, but communication reliability for safety-critical data may deteriorate
Solution Approach 1:
The communication system segments traffic into different channels and protocols: V2X safety-critical communication uses the dedicated 802.11p protocol with 10MHz channel width for reliability, while infotainment and general data transfer use standard WLAN (802.11ac) with 40-80MHz channel width for high bandwidth utilization, and Bluetooth Low Energy for low-priority data
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a vehicle system (1) comprising a V2X unit (2) for operating a vehicle-to-X communication, having a communications module (3) for wireless data transfer, and a control device (5) for controlling a user application, having a communications module (50) for wireless data transfer which can be coupled with the communications module (3) of the V2X unit (2), wherein the V2X unit (2) and the control unit (5) can be activated into a data transfer mode in order to couple the communications modules (3, 50) of the V2X unit (2) and of the control device (5) with each other for a data exchange.