In-Vehicle Network Soft Mitigation for Wi-Fi and BLE Coexistence
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Solution Overview
Problem
Conventional vehicle networks cannot simultaneously operate multiple networks like Wi-Fi, Bluetooth Low Energy, and Ultra Wideband due to interference from operating in the same or nearby frequency bands, leading to the need for hard mitigation where one network is shut down to prevent interference.
Innovation Solution
A vehicle network system that employs soft mitigation techniques by using Integrated Circuits (ICs) to detect, characterize, and mitigate in-band noise across multiple networks. The Wi-Fi IC determines if in-band noise is generated by the Wi-Fi network and takes corrective actions such as switching bands or reducing transmission power, while the BLE and UWB ICs adjust their frequencies and bandwidths accordingly to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple networks (Wi-Fi, BLE, UWB) operate simultaneously in the same frequency band, then network coverage and connectivity options are improved, but interference between networks increases causing performance degradation
Solution Approach 1:
The system dynamically adjusts network parameters including frequency, bandwidth, and transmission power based on real-time interference conditions. The ICs continuously monitor the electromagnetic spectrum and adapt their operation to avoid interference, allowing multiple networks to coexist dynamically rather than statically
Solution Approach 2:
The patent changes operational parameters such as frequency band, channel width, and transmission power level to optimize network performance. When interference is detected, the system modifies these parameters to relocate networks to less congested frequency bands or adjust their power levels to reduce harmful interactions
2Reliability
If hard mitigation is performed by shutting down one network to prevent interference, then network performance is maintained, but functionality is lost due to complete shutdown
Solution Approach 1:
Instead of completely shutting down networks during interference events, the system maintains continuous operation by dynamically adjusting parameters. All networks remain active and functional, with their operations continuously adapted to avoid interference, ensuring uninterrupted service
Solution Approach 2:
The system applies partial mitigation by adjusting only the necessary parameters (frequency, bandwidth, power) rather than implementing complete network shutdown. This partial action is sufficient to resolve interference while preserving network functionality and service continuity
3Adaptability or versatility
If network parameters are continuously adjusted to avoid interference, then coexistence is improved, but system complexity increases
Solution Approach 1:
Each network's IC autonomously monitors interference conditions and independently adjusts its own parameters without requiring centralized control. The systems self-regulate by detecting interference and automatically modifying frequency, bandwidth, or power levels, reducing the need for complex external management
Solution Approach 2:
The system implements feedback mechanisms where ICs continuously monitor the electromagnetic spectrum and adjust network parameters based on real-time interference conditions. This closed-loop control enables adaptive coexistence while keeping the control logic distributed and manageable within each IC
Data Source
AI summary
A vehicle comprises a Wi-Fi network including at least one Wi-Fi antenna module including a Wi-Fi antenna in communication with a Wi-Fi Integrated Circuit (IC) and a Bluetooth Low Energy (BLE) network including at least one BLE antenna module including a BLE antenna and a BLE IC, the BLE IC configured to detect in-band noise, characterize the in-band noise, and transmit the characterization of the in-band noise to the Wi-Fi IC.