Vehicle Communication Control Using Doppler-Based Target Selection
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Solution Overview
Problem
Existing vehicle-to-vehicle communication systems struggle to effectively communicate with vehicles requiring attention when numerous vehicles are present around the host vehicle, potentially leading to missed information exchange.
Innovation Solution
An information processing device and method that utilizes a communication unit to perform data communication with designated moving bodies based on the amount of frequency transition due to Doppler shift, allowing for the extraction and initiation of data communication with specific vehicles using directional beam control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna unit controls directivity based on radar detection of other vehicles, then communication can be performed with vehicles in the vicinity of the host vehicle, but the host vehicle may be unable to communicate with another vehicle requiring attention when numerous vehicles are present
Solution Approach 1:
The patent changes the selection parameter from spatial proximity (distance-based) to velocity characteristics (Doppler shift-based). By extracting vehicles with relative speed equal to or greater than a threshold from the Doppler shift of received signals, the system identifies vehicles requiring attention regardless of their distance, thus preventing information loss while maintaining communication reliability
Solution Approach 2:
The patent segments the communication process into two distinct stages: (1) initial vehicle extraction using Doppler shift to identify vehicles requiring attention, and (2) subsequent directivity control using antenna beamforming. This segmentation allows the system to first identify target vehicles based on velocity characteristics, then optimize communication with those specific vehicles, resolving the contradiction between comprehensive detection and reliable communication
2Loss of information
If the host vehicle communicates with all detected vehicles, then no information is lost, but the system cannot prioritize vehicles requiring attention in congested environments
Solution Approach 1:
The patent performs preliminary action by extracting vehicles requiring attention using Doppler shift analysis before establishing communication. This pre-screening based on velocity characteristics (relative speed threshold) allows the system to prioritize vehicles that need attention, improving communication efficiency without losing critical information
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables reliable and timely acceptance of necessary information by filtering and prioritizing communication with vehicles that require attention, even in congested environments.
Implementation Method 1
Based on an amount of transition in frequency due to a Doppler shift that corresponds to a relative speed
Data Source
AI summary
An information processing device includes a communication unit and a controller. The communication unit performs data communication with another vehicle present in an area around a host vehicle. The controller controls the data communication performed by the communication unit. Based on an amount of transition in frequency due to a Doppler shift corresponding to a relative speed of the other vehicle in relation to the host vehicle, the controller extracts, from among a plurality of the other vehicles, a designated moving body with which the communication unit is to perform the data communication. The controller initiates the data communication with the designated moving body.