Wireless Localization Network Initialization
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Solution Overview
Problem
Existing wireless localization methods in industrial settings face challenges in efficiently initializing and maintaining network connectivity for accurate positioning of moving objects within limited spaces, especially during network restarts or changes in environmental conditions.
Innovation Solution
A method utilizing a network topology with self-sufficient reference nodes connected in daisy chain configurations, where administration nodes communicate setup information and UIDs/LIDs to form resilient communication structures, enabling trilateration-based localization using UWB signals and dynamic TDMA/CDMA time slot management for precise object positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional wireless localization networks are initialized during commissioning or restart, then the network can establish basic connectivity, but the network fails to maintain reliable connectivity when environmental conditions change or objects are added/removed
Solution Approach 1:
The network initialization method dynamically adapts to changing environmental conditions by continuously detecting new objects and reorganizing network segments. Instead of static initialization, the system performs dynamic object detection, determines spatial relationships, and reconfigures daisy-chain connections in real-time to maintain reliable connectivity as objects are added or removed from the monitored space.
Solution Approach 2:
The system enables self-service by allowing reference nodes to autonomously detect new objects, determine their positions through trilateration, and automatically reorganize network segments without external intervention. The reference nodes independently manage their own initialization and adaptation, eliminating the need for manual reconfiguration when environmental conditions change.
2Device complexity
If daisy chain topology is used for reference nodes, then network structure becomes simpler and more resilient, but initialization complexity increases due to need for object detection and spatial relationship determination
Solution Approach 1:
The system performs preliminary actions by having reference nodes continuously detect and catalog objects in the monitored space before final network configuration. Objects are pre-identified and their spatial relationships are determined in advance, allowing the daisy-chain topology to be efficiently established without complex real-time initialization procedures when objects are added or removed.
Solution Approach 2:
The initialization process incorporates feedback mechanisms where reference nodes continuously monitor the space, detect new objects, and use trilateration to determine spatial relationships. This feedback loop provides real-time information about object positions and network connectivity status, enabling automatic adjustment of the daisy-chain topology to maintain optimal network structure.
3Measurement precision
If time-of-flight measurements are used for localization, then positioning precision is improved, but the network requires complex synchronization and initialization procedures
Solution Approach 1:
The network is segmented into multiple independent daisy-chain segments, each managed by reference nodes that perform localized time-of-flight measurements. By dividing the overall localization task into smaller segment-specific measurements, the system achieves high positioning precision while reducing the complexity of global synchronization, as each segment can be initialized and synchronized independently.
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 approach allows for reliable and efficient object localization with minimal errors, autonomous registration, and adaptability to changing environmental conditions, reducing the need for external data connections and enabling quick reorganization of network segments.
Implementation Method 1
an administration node of the segment sends a plurality of initialization packets to the reference nodes of the segment via a broadcast channel
Implementation Method 2
Each of the at least two reference nodes of the segment determines spatial position information of a plurality of objects to be localized in the segment, in particular distance information, on the basis of time-of-flight measurements
Data Source
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AI summary
In a method for initializing at least one network segment of a network for wirelessly locating movable objects arranged in a limited space (115) by means of pulsed radio signals, wherein the at least one network segment in the limited space (115) has at least two spatially distributed reference nodes (135 - 180) forming a chain-like communication network and being communicationally self-sufficient, wherein a locating object (288) arranged in the limited space (115) can be located by means of a distance-based trilateration carried out by the at least three reference nodes (135 - 180), and wherein communication of general information takes place via broadcast channels, it is particularly provided that the reference nodes (135 - 180) are in a waiting state listening to broadcast channels until initial information about their active participation in the communication network is received.