Indoor Localization via Advertisement Message Exchange
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Solution Overview
Problem
Indoor localization methods face challenges in accurately determining the position of assets within environments, particularly due to the limitations of existing technologies like GNSS, which are not suitable for indoor use and often require complex synchronization and infrastructure setups.
Innovation Solution
A hybrid localization approach involving nodes that transmit advertisement messages indicating their localization capabilities, with responders providing known positions and signal information to enable distance and angle calculations, allowing assets to determine their position using multilateration without the need for extensive infrastructure computation or synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GNSS is used for localization, then positioning can be achieved, but it is not suitable for indoor environments and requires complex synchronization and infrastructure setups
Solution Approach 1:
The patent replaces complex mechanical synchronization systems with a simplified radio-based advertisement message exchange mechanism. Instead of requiring synchronized clocks and complex infrastructure setups, nodes simply transmit advertisement messages containing their known positions, enabling localization through basic radio communication protocols like Bluetooth and WiFi.
Solution Approach 2:
The patent extracts the essential localization function from complex GNSS systems by using only the core elements needed for indoor positioning: nodes with known positions transmitting advertisement messages and receivers calculating distances based on signal strength. This extraction eliminates the need for complex synchronization and infrastructure while maintaining localization capability.
2Measurement precision
If existing indoor localization methods are used, then positioning can be achieved, but they require complex synchronization and infrastructure setups
Solution Approach 1:
The patent implements self-service by having nodes autonomously transmit their known positions in advertisement messages without requiring centralized coordination or complex infrastructure setup. Each node independently provides localization information, and receivers independently calculate distances using signal strength, eliminating the need for complex synchronized infrastructure.
3Device complexity
If simplified localization messages are used, then system complexity is reduced, but the ability to determine position may be compromised
Solution Approach 1:
The patent makes advertisement messages universal by incorporating multiple types of information (node position, signal strength data) that serve multiple purposes: positioning, distance calculation, and accuracy assessment. This multi-functionality allows simplified messages to maintain high positioning accuracy without requiring complex dedicated infrastructure.
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
This method provides a cost-effective and scalable solution for indoor localization, enabling accurate positioning of assets with reduced system complexity and cost, suitable for various environments including underground spaces, by leveraging Bluetooth, WiFi, and cellular technologies.
Implementation Method 1
transmitting, by a first node, an advertisement message indicating a localization capability of the first node
Implementation Method 2
receiving, by the first node, a response message transmitted by a second node indicative of at least a known position of the second node
Implementation Method 3
The first node may be configured to determine a distance of the first node with respect to the second node based, at least in part, on a received signal strength associated with the response message and the known position of the second node in the response message
Implementation Method 4
The first node may be configured to determine an angle of arrival or angle of departure of a signal comprising the response message transmitted by the second node
Data Source
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AI summary
Example embodiments describe an apparatus, method and computer program relating to localization. For example, the method may comprise transmitting, by a first node, an advertisement message indicating a localization capability of the first node. The method may also comprise receiving, by the first node, a response message transmitted by a second node indicative of at least a known position of the second node. The method may also comprise determining, by the first node, a position of the first node with respect to the second node using the at least known position.