Portable Device Location Using Auxiliary Signal Monitoring Links

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Solution Overview

Problem

Conventional RTLS systems for determining the location of portable devices are often inaccurate due to interference and resource allocation issues, leading to measurement errors in signal strength-based location determination.

Innovation Solution

A communication system with a master device that directs monitor devices to monitor communications over a primary link, using an auxiliary communication link to sense signal characteristics and determine location information, thereby conserving resources on the portable device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If signal strength is used as a basis for determining location information, then location determination can be performed with simple technology, but measurement precision deteriorates due to interference and resource allocation issues

Engineering Contradiction:

Improvesimplicity of location determination technologyVSAvoidaccuracy of location information

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The system segments the communication link into multiple independent measurement paths: the primary communication link for data transmission and auxiliary communication links dedicated to signal characteristic monitoring. This segmentation allows location determination to be based on multiple signal characteristics (signal strength, timing, angles) rather than relying solely on signal strength, thereby improving measurement precision while maintaining technological simplicity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an intermediary monitoring mechanism where the master controller independently monitors signal characteristics through auxiliary communication links separate from the primary communication link. This intermediary approach allows accurate location determination without burdening the portable device's resources, as the monitoring occurs through dedicated measurement paths rather than competing for the same resources as data transmission

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If the portable device performs multiple concurrent Bluetooth operations, then functionality is improved, but resource allocation deteriorates affecting location determination accuracy

Engineering Contradiction:

Improveconcurrent Bluetooth operations capabilityVSAvoidlocation determination accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The system introduces an intermediary monitoring mechanism where the master controller independently monitors signal characteristics through auxiliary communication links. This allows location determination to proceed accurately even when the portable device is engaged in multiple concurrent Bluetooth operations, as the monitoring does not compete for the portable device's limited resources

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The master controller performs self-service by independently monitoring its own communication link and determining location information based on monitored signal characteristics. This eliminates the need for the portable device to allocate resources for location determination, allowing it to maintain multiple concurrent Bluetooth operations without affecting location accuracy

Inventive Principle:

Principle #25Self-service

3Measurement precision

If multiple communication links are established for monitoring, then measurement precision is improved, but device complexity increases

Engineering Contradiction:

Improvelocation determination accuracyVSAvoidcommunication link structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The auxiliary communication links serve multiple functions: they are used for monitoring signal characteristics (signal strength, timing, angles) and for communicating monitored data back to the master controller. This multi-functionality allows accurate location determination without proportionally increasing device complexity, as the same communication infrastructure serves both monitoring and data transmission purposes

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12464315B2System and method for establishing real-time location

Publication Date: 2025.11.04 DENSO CORP

AI summary

A communication system with a master device configured to determine location information in real-time with respect to a portable device. The master device may direct one or more monitor devices to monitor communications that occur over a primary communication link. The monitor devices may sense characteristic information about the signal from the portable device, and communicate this characteristic information to the master device via an auxiliary communication link. The communication system may determine location of the portable device, authenticate the portable device, determine whether the portable device is authorized to allow or initiate an action, and command or enable an action with respect to equipment.