Zone-Based Frequency Allocation for In-Vehicle Wireless Networks
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Solution Overview
Problem
Wireless in-vehicle networks experience inter-vehicle interference due to shared frequency resources, leading to unreliable data reception and potential sub-optimal driving decisions, especially as vehicles with complex wiring infrastructures increase in number.
Innovation Solution
A scheduler allocates frequency resources to different zones within a vehicle based on their location, maximizing frequency spacing between zones on opposite sides or ends, and adaptively switches resources when vehicles change direction to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency resources are shared across all zones in a vehicle, then resource utilization is improved, but inter-vehicle interference increases
Solution Approach 1:
The patent divides the vehicle's frequency resources into zone-specific allocations, where different frequency portions are assigned to different spatial zones (e.g., front, rear, left, right). This segmentation allows simultaneous resource utilization across zones while reducing interference between adjacent vehicles, as each vehicle's zones use distinct frequency portions.
Solution Approach 2:
The patent implements location-dependent frequency allocation where each zone receives frequency resources optimized for its specific spatial characteristics and interference environment. This local quality approach ensures that frequency resources are tailored to local conditions rather than uniformly distributed, improving both utilization and interference management.
2Reliability
If wired connections are used for all components, then communication reliability is improved, but wiring infrastructure complexity increases
Solution Approach 1:
The patent replaces the mechanical wiring infrastructure with wireless communication systems for in-vehicle networking. By using wireless frequency resources allocated to different zones, the system eliminates complex physical wiring while maintaining communication reliability through structured frequency management and interference reduction techniques.
3Object-affected harmful factors
If maximum frequency spacing is allocated to opposite zones, then inter-vehicle interference is reduced, but frequency resource efficiency decreases
Solution Approach 1:
The patent implements dynamic frequency allocation where the frequency spacing between opposite zones is adjusted based on real-time interference conditions and vehicle density. When interference is detected or vehicles are in close proximity, maximum spacing is applied; otherwise, frequency resources are dynamically reallocated to improve efficiency while maintaining acceptable interference levels.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some systems, a vehicle may identify a set of zones of the vehicle, each zone including a number of components connected to a wireless in-vehicle network of the vehicle. A scheduler of the vehicle may associate a different set of frequency resources to each zone of the vehicle and may allocate frequency resources to each component of the vehicle from the set of frequency resources associated with the zone in which the component is located. The scheduler may associate the different sets of frequency resources with the different zones of the vehicle such that two zones that are located at opposite sides or ends of the vehicle may be associated with sets of frequency resources that are spaced in frequency from each other by a maximum frequency spacing.