Network-Coordinated Vehicle Radar Waveforms for Interference Control
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Solution Overview
Problem
Current techniques for managing interference between multiple vehicle radars in V2X communications systems are deficient, leading to issues such as ghost targets and false alarms due to varying radar capabilities and frequent entry/exit of vehicles with different capabilities.
Innovation Solution
A network entity, like a roadside unit or base station, coordinates radar waveforms by identifying a common configuration based on reported capabilities of UEs within its control area, ensuring all radars apply a common set of parameters to prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If each radar operates independently with its own configuration, then device complexity is reduced and ease of operation is improved, but interference between radars increases leading to ghost targets and false alarms
Solution Approach 1:
The network entity acts as an intermediary that collects capability information from multiple UEs, determines a common radar configuration, and distributes it to all participating UEs. This mediator approach coordinates radar operations across the network, reducing interference through centralized management while maintaining individual UE simplicity.
Solution Approach 2:
The system changes radar configuration parameters (frequency, bandwidth, waveform, power) from individual UE-specific settings to network-coordinated common settings. By standardizing these parameters across multiple UEs, the system reduces harmful interference while managing complexity through parameter harmonization.
2Object-affected harmful factors
If a common radar configuration is enforced across all UEs, then interference is reduced, but adaptability to different UE capabilities deteriorates
Solution Approach 1:
The network entity performs preliminary actions by collecting capability information from all UEs before determining the common configuration. This advance knowledge allows the network to select parameters that are compatible with the greatest number of UEs, balancing interference reduction with capability adaptability through informed decision-making.
Solution Approach 2:
The system implements feedback mechanisms where UEs report their capability information to the network entity. This feedback loop enables the network to adapt the common configuration based on actual UE capabilities, ensuring that the standardized parameters are feasible for all participating devices while still reducing interference.
3Measurement precision
If capability reporting is required from all UEs, then network coordination accuracy is improved, but signaling overhead and loss of time increase
Solution Approach 1:
UEs autonomously determine and report their own capability information without requiring complex network queries or negotiations. This self-service approach allows UEs to independently provide the necessary capability data, reducing the time and signaling overhead associated with capability collection while maintaining accurate configuration matching.
4Adaptability or versatility
If radar configuration is frequently updated to accommodate new vehicles, then adaptability is improved, but stability of the radar operation deteriorates
Solution Approach 1:
The network entity continuously monitors the UE population and capability distribution, using feedback to determine when configuration updates are necessary. This feedback-driven approach allows the system to adapt to new vehicles and capability changes while maintaining stability by avoiding unnecessary updates and only changing parameters when truly needed.
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may include a radar which is used for object detection, such as a vehicle UE detecting other vehicle UEs in a vehicle-to-everything (V2X) communications system. The UE may be configured for coordinated interference, where radars transmit a common waveform while applying different delays to prevent negative co-channel interference effects, such as false or ghost targets. The techniques described herein support configuring a common configuration for network-assisted coordinated interference by considering capabilities of UEs and radars within a geographic area controlled by a network entity. The network entity may identify and indicate a waveform configuration which is used by radars within the geographic control area of the network entity.