Multi-Band Communication Device for Precise Spatial Sensing

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Solution Overview

Problem

Existing spatial sensing technologies using wireless signals in GHz bands struggle to balance accuracy and speed, as low-frequency bands are suitable for wide-range sensing but not for detecting small objects, while high-frequency bands provide high directivity but require sector scans, limiting rapid wide-range measurement.

Innovation Solution

A communication device that utilizes both a first frequency band below 10 GHz and a second frequency band at or above 10 GHz for transmitting and receiving measurement signals, with a control signal in the first band to manage both types of sensing, enhancing communication reliability and reducing sensing time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If low-frequency band (below 10 GHz) is used for spatial sensing, then wide-range sensing capability is improved, but detection accuracy for small objects deteriorates

Engineering Contradiction:

Improvesensing coverage areaVSAvoidsmall object detection accuracy

Core Design Contradiction:

Area of stationary objectVSMeasurement precision

Solution Approach 1:

The spatial sensing system is segmented into two frequency band components: low-frequency band (below 10 GHz) for wide-range sensing and high-frequency band (10 GHz or above) for precise small object detection. Each frequency band performs a specialized function, and their results are integrated to achieve both wide coverage and high precision simultaneously.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system transitions from single-frequency sensing to multi-frequency band sensing, adding a frequency dimension to the sensing capability. By operating in multiple frequency bands simultaneously, the system achieves both wide-area coverage (from low frequency) and high-resolution detection (from high frequency) that cannot be obtained with a single frequency band alone.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Measurement precision

If high-frequency band (10 GHz or above) is used for spatial sensing, then directivity and small object detection accuracy are improved, but sensing speed deteriorates due to required sector scans

Engineering Contradiction:

Improvesmall object detection accuracyVSAvoidsensing speed

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The sensing task is segmented between frequency bands: high-frequency band signals are used only for targeted small object detection when needed, rather than performing full-sector scans for general surveillance. This segmentation allows high-precision detection without sacrificing overall sensing speed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of performing complete sector scans with high-frequency signals for all sensing scenarios, the system applies high-frequency signals partially or selectively only when small object detection is required. This partial action approach maintains sensing speed while providing high-precision detection capability when needed.

Inventive Principle:

Principle #16Partial or excessive action

3Device complexity

If single frequency band is used for spatial sensing, then system complexity is reduced, but ability to balance accuracy and speed deteriorates

Engineering Contradiction:

Improvesystem complexityVSAvoidspatial sensing accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The communication device is designed with multi-functionality to operate in both low-frequency band (for wide-range sensing) and high-frequency band (for precise detection). This universal design allows a single device to perform multiple sensing functions that would otherwise require separate specialized systems, achieving both accuracy and speed without proportionally increasing complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250294506A1Communication device, communication method, and non-transitory storage medium

Publication Date: 2025.09.18 TOYOTA JIDOSHA KK

AI summary

A communication device functioning as a first communication device in a spatial sensing system includes a controller. The controller is configured to transmit a control signal for controlling both spatial sensing using a first measurement signal and spatial sensing using a second measurement signal to a second communication device in a first frequency band. The controller is configured to transmit to the second communication device or receive from the second communication device, the first measurement signal in the first frequency band. The controller is configured to transmit to the second communication device or receive from the second communication device, the second measurement signal in a second frequency band higher than the first frequency band.