Dynamic Tag Polling for Accurate AOA Locationing
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Solution Overview
Problem
Conventional locationing devices suffer from inefficiencies in determining accurate angles-of-arrival (AOA) and asset locations due to an inverse relationship between tag sampling frequency and battery life, leading to inaccurate determinations and rapid battery depletion.
Innovation Solution
Implementing systems and methods that allow tags to transmit data packets at a higher transmission rate during priority instances, ensuring accurate AOA and asset location determination while preserving battery life by selectively adjusting transmission rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sampling rate of tags is increased to improve locationing accuracy, then the AOA determination accuracy is improved, but the battery life is depleted rapidly
Solution Approach 1:
The patent implements dynamic transmission rate adjustment where tags switch between a reduced transmission rate for normal operation and a priority transmission rate when locationing accuracy is critical. The anchor device requests tags to transmit at the priority rate only when higher accuracy AOA determination is needed, thereby dynamically adapting the sampling rate to actual needs and resolving the contradiction between measurement precision and energy consumption.
Solution Approach 2:
The system changes the transmission rate parameter based on operational requirements. Tags operate at a reduced transmission rate during normal conditions to conserve battery, and switch to a higher priority transmission rate when the anchor device requests improved locationing accuracy. This parameter change allows the system to optimize both battery life and measurement precision at different times.
2Duration of action of moving object
If the sampling rate is reduced to extend battery life, then the battery life is extended, but the AOA determination accuracy deteriorates
Solution Approach 1:
The system dynamically adjusts the transmission rate based on the locationing accuracy requirements. During normal operation, tags transmit at a reduced rate to extend battery life. When the anchor device determines that higher accuracy is needed, it requests the tag to switch to the priority transmission rate, ensuring accuracy is maintained when needed while extending battery life during normal conditions.
Solution Approach 2:
The transmission rate parameter is changed from a fixed value to a variable that can switch between reduced and priority rates. This allows the system to optimize battery life during normal operation and improve AOA determination accuracy when required by changing the transmission rate parameter in response to anchor device requests.
3Device complexity
If conventional peak search algorithms are used to determine AOA, then the system complexity is low, but the locationing accuracy deteriorates due to wrong peak detection
Solution Approach 1:
The patent implements a feedback mechanism where the anchor device receives AOA measurements from tags and can request re-transmission at priority rates if the initial measurements are insufficient or inaccurate. This feedback loop allows the system to correct wrong peak detections by requesting additional measurements under optimized conditions, thereby improving locationing accuracy without significantly increasing system complexity.
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
Accurately determines AOA and asset locations during priority instances while maintaining tag battery life, enhancing the efficiency and reliability of locationing systems.
Implementation Method 1
an anchor configured to poll the tag at a first transmission rate and determine an angle-of-arrival (AOA) based on signal data received from the tag
Data Source
AI summary
Systems and methods for system for tag polling are disclosed herein. An example system includes: a tag associated with an asset; an anchor configured to poll the tag at a first transmission rate and determine an angle-of-arrival (AOA) based on signal data received from the tag; and a server communicatively coupled with the anchor. The server may be configured to: receive first information corresponding to the tag, the first information being indicative of one or more first instances where the anchor polls the tag at a second transmission rate that is different from the first transmission rate. The server may further be configured to receive, from the anchor, a tag listing that includes the tag, determine a first instance occurrence for the tag based on the first information, and transmit a request to the anchor that causes the anchor to poll the tag at the second transmission rate.