Self-Synchronized Beacon Network for Tunnel Asset Tracking
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Solution Overview
Problem
Traditional fixed beacon Real Time Location Systems face accuracy issues when tracking fast-moving assets due to the need for entire beacon intervals to receive messages from multiple beacons, leading to errors in position calculations as distance measurements are spread out over time.
Innovation Solution
A self-synchronization sensor system where beacons communicate periodically and adjust their transmission timing to send messages close in time to neighboring beacons, allowing beacon gateways to hear all nearby beacons within a few milliseconds, using a synchronization interval with multiple time slots and an outward progression of time slot allocation from an origin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If beacons transmit messages at fixed intervals, then the system operation is simple, but the position calculation accuracy deteriorates for fast-moving assets
Solution Approach 1:
The beacon transmission system transitions from static fixed-interval transmissions to dynamic synchronized transmissions. Beacons adjust their transmission timing based on spatial relationships and collide-avoidance algorithms, allowing messages to be transmitted in close temporal proximity when multiple beacons are near the asset, thereby improving position calculation accuracy while maintaining system manageability through automated coordination.
2Adaptability or versatility
If beacons transmit independently at different times, then each beacon operates autonomously, but the position measurement accuracy deteriorates due to time-spread distance measurements
Solution Approach 1:
A synchronized beacon communication system implements feedback mechanisms where beacons exchange timing and position information. The first beacon establishes a reference time, and subsequent beacons adjust their transmissions based on received signals from neighboring beacons. This feedback loop enables coordinated transmissions that reduce temporal spreading of distance measurements, improving position accuracy while preserving individual beacon autonomy through distributed decision-making.
3Measurement precision
If beacons transmit simultaneously, then the position calculation uses simultaneous distance measurements, but signal collision and interference increase
Solution Approach 1:
The beacon transmission system segments the transmission process into coordinated time slots and spatial groups. Instead of all beacons transmitting simultaneously, the system divides beacons into groups that transmit in a synchronized sequence, with the first beacon establishing a reference time and subsequent beacons following in defined intervals. This segmentation reduces signal collisions while maintaining the benefit of closely-timed measurements for accurate position calculation.
4Ease of manufacture
If beacons use fixed transmission intervals, then the system is easy to implement, but tracking accuracy for fast-moving assets deteriorates
Solution Approach 1:
The beacon system implements self-service through automated synchronized communication protocols. Beacons autonomously adjust their transmission timing based on signals from neighboring beacons and collide-avoidance algorithms, eliminating the need for complex centralized coordination infrastructure. The first beacon establishes a reference time, and other beacons self-adjust their transmissions based on received signals, achieving improved tracking accuracy while maintaining implementation simplicity through distributed self-organization.
Data Source
AI summary
A self-synchronization sensor system is provided. A self-synchronization sensor system for tracking fast moving assets comprising a plurality of beacons with known coordinates in a tunnel communicating with said plurality of beacons periodically during a synchronization interval and adjusting a beacon interval for each of said plurality of beacons such that one or more beacon messages are transmitted in short time intervals to the plurality of beacons in close proximity. The synchronization interval comprising a plurality of time slots, a first beacon from the plurality of beacons assigned a first time slot from the plurality of time slots within the synchronization interval and launches an origin and a progression of time slot allocation of the plurality of time slots from the origin based on the communication between the plurality of beacons.