Vehicle Relay Coverage Control for Inter-Vehicle Interference
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Solution Overview
Problem
Current vehicle communication systems face challenges in coexistence with other vehicles due to inter-vehicle interference and harsh channel conditions, such as high path loss and engine noise, which require high transmission power and can lead to interference issues.
Innovation Solution
A vehicle communications system with a vehicle controller and a set of relay devices that provide wireless coverage in multiple vehicle regions, with the ability to opportunistically activate or deactivate relay devices based on traffic conditions to reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high transmission power is used to overcome harsh channel conditions and high path loss, then communication reliability is improved, but inter-vehicle interference increases
Solution Approach 1:
The system segments the coverage area into multiple vehicle regions and divides the transmission task between the vehicle controller and multiple relay devices. Each relay device handles communication in its specific region, allowing the system to achieve reliable coverage throughout the vehicle without requiring the vehicle controller to transmit at high power across the entire area, thereby reducing inter-vehicle interference.
Solution Approach 2:
Relay devices are introduced as intermediary elements between the vehicle controller and wireless devices in various vehicle regions. These relays receive signals from the vehicle controller and retransmit them locally, enabling reliable communication in harsh channel conditions while keeping the vehicle controller's transmission power low and minimizing interference to other vehicles.
2Area of stationary object
If relay devices are activated to provide wireless coverage in multiple vehicle regions, then coverage area is improved, but device complexity increases
Solution Approach 1:
The system dynamically activates or deactivates relay devices based on traffic conditions and interference levels. When a neighboring interference source is detected or interference exceeds a threshold, the vehicle controller transitions to a first mode and activates relay devices to expand coverage. When interference is low, the system transitions to a second mode and deactivates relays, simplifying the system. This dynamic adaptation allows the system to achieve extended coverage only when necessary.
Solution Approach 2:
The system changes operational parameters by transitioning between different modes of operation. In the first mode, relay devices are activated to expand wireless coverage area. In the second mode, relay devices are deactivated to reduce system complexity. This parameter change approach allows the system to adapt its coverage area and complexity based on real-time traffic conditions.
3Device complexity
If the vehicle controller provides direct wireless coverage in all vehicle regions, then system complexity is reduced, but transmission power requirements increase
Solution Approach 1:
Instead of having the vehicle controller provide direct coverage to all vehicle regions, the system segments the coverage responsibility between the vehicle controller and multiple relay devices. Each relay device is responsible for a specific vehicle region, allowing the vehicle controller to operate at lower power levels while still achieving comprehensive coverage through the distributed relay network.
Solution Approach 2:
Relay devices serve as intermediaries that receive signals from the vehicle controller and retransmit them to wireless devices in specific vehicle regions. This intermediary approach allows the vehicle controller to maintain low transmission power while still providing coverage across all vehicle regions through the relay network.
Data Source
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AI summary
Disclosed are techniques for wireless communication. In an aspect, a vehicle communications system of a vehicle comprises a vehicle controller (500) with a wireless communications interface capable of providing wireless coverage in a plurality of vehicle regions, and a set of relay devices that are each communicatively coupled to the vehicle controller and are each capable of providing wireless coverage in at least one of the plurality of vehicle regions. In a further aspect, the vehicle controller transitions between first and second modes of communication (1020) based in part upon a traffic condition (1010)