Partitioned Vehicle Wireless Links With Redundant Power Failover
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Solution Overview
Problem
Conventional vehicular wireless communication systems face reliability issues due to exposure to high temperatures when installed near vehicle antennas and incur additional costs and signal interference from lengthy wiring harnesses, especially when installed in crash-safe areas.
Innovation Solution
A partitioned wireless communication system with redundant data links and power lines is implemented, where a communication gateway unit is placed in a crash-safe area and a remote wireless transceiver unit is located proximate to the antennas, using multiple data and power lines to ensure continuous data and power transfer in case of disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the wireless communication system is assembled in areas close to vehicle antennas to minimize signal interference, then signal quality is improved, but the system is exposed to high temperatures
Solution Approach 1:
The wireless communication system is divided into two separate units: a remote wireless transceiver unit (RWTU) placed near the antennas for optimal signal quality, and a communication gateway unit (CGU) placed in a crash-safe area for thermal protection and system management. This segmentation allows each unit to be positioned in its optimal location without compromising the other.
2Reliability
If the wireless communication system is assembled in crash-safe areas to protect against accidents, then system safety is improved, but lengthy wiring harnesses are needed connecting the system to antennas causing signal interference and additional costs
Solution Approach 1:
The system is segmented into RWTU and CGU units connected by redundant data links and power lines. The RWTU is placed near antennas to minimize wiring length and signal interference, while the CGU is placed in a crash-safe area for protection. This segmentation allows the system to benefit from both locations simultaneously.
Solution Approach 2:
Different parts of the system are placed in locations optimized for their specific functions: the RWTU is located where signal quality is critical (near antennas), while the CGU is located where safety is critical (crash-safe area). Each location provides the local quality needed for its specific operational requirements.
3Reliability
If redundant data links and power lines are implemented to ensure continuous operation during disruptions, then reliability is improved, but device complexity increases
Solution Approach 1:
The system incorporates redundant data links and power lines as preventive measures against potential failures. These redundant paths are prepared in advance to cushion against disruptions, ensuring continuous operation without requiring complex real-time decision-making during failures.
Solution Approach 2:
The communication processor-circuit acts as an intermediary that manages the redundant data links and power lines, detecting losses and switching between them automatically. This intermediary simplifies the management of redundancy by centralizing the control logic in a single component.
Data Source
AI summary
Embodiments are disclosed for a partitioned wireless communication system for a vehicle with redundant data links and power lines. In an embodiment, a system comprises: a communication gateway unit (CGU) located at a first location of the vehicle includes a communication processor, a first power supply, and a first data interface. A remote wireless transceiver unit (RWTU) located at a second location of the vehicle includes a second data interface coupled to the first data interface using redundant data links, a power interface coupled the first power supply to the RWTU using redundant power lines, and wireless transceiver(s) coupled to antenna(s) on the vehicle. The communication processor detects a loss of a first data link or a first power line, and in response to the detecting, selecting a second data link or second power line to transfer data or power, respectively, between the CGU and the RWTU.