UWB-Enabled Device Location Through Multiple Data-Phase Rounds
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Solution Overview
Problem
Conventional UWB communication methods limit data transfer and ranging processes to a single phase, compromising transaction time and security during fare transactions between transit gates and mobile devices.
Innovation Solution
Implementing multiple ranging processes or rounds during data transfer phases using double-sided two-way ranging (DS-TWR) with synchronized data transfer TX and RX slots, allowing flexible participation in ranging rounds without data transfer requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transfer and ranging processes are limited to a single phase, then the communication process is simple, but transaction time increases and security is compromised
Solution Approach 1:
The communication process is divided into multiple phases: a first phase for initial data transfer and a second phase for additional data transfer and ranging. This segmentation allows the system to perform multiple ranging processes during data transfer, improving transaction time and security without overwhelming complexity in a single phase.
Solution Approach 2:
The patent enables ranging processes to continue during data transfer phases rather than completing all ranging before data transfer. This continuous execution of useful actions (both data transfer and ranging) improves overall efficiency and reduces total transaction time while maintaining security through multiple ranging measurements.
2Reliability
If multiple ranging processes are performed during data transfer, then security and location precision are improved, but the communication protocol complexity increases
Solution Approach 1:
The patent merges data transfer operations with ranging operations by allowing ranging processes to execute during data transfer phases. This combining of operations enables multiple ranging measurements to be performed without separate dedicated time, improving security and location precision while managing protocol complexity through integrated processing.
Solution Approach 2:
The system performs preliminary ranging measurements during the data transfer process rather than after. By initiating ranging actions in advance and continuing them through the data transfer phase, the system ensures security and location accuracy are established before the transaction completes, improving reliability without requiring complex post-transfer processing.
3Measurement precision
If multiple ranging processes are executed during data transfer, then location precision is improved, but the transmission time increases
Solution Approach 1:
The patent implements continuous ranging measurements during the data transfer phase, eliminating idle time between data transfer and ranging operations. This continuity ensures location precision is maintained throughout the transaction while minimizing total transmission time by avoiding sequential bottlenecks.
Solution Approach 2:
The system performs ranging measurements in advance during the data transfer process rather than after the transfer completes. This preliminary action ensures location precision is established early in the transaction, reducing the overall time loss that would occur if all ranging were performed sequentially after data transfer.
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
Enhances security and precision in locating UWB-enabled devices during transactions by enabling precise allocation and reducing transaction time to approximately 300ms with a total transmission scheme of 400ms.
Implementation Method 1
performing multiple distance measurements between the transit gate and the UWB enabled device during the data transfer process
Data Source
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AI summary
A method of locating a UWB enabled mobile device (10) in a UWB based transit deployment (100) is disclosed. Performed is a data transfer process within a specified proximity between the UWB enabled device (10) and anchors of a transit gate (G1...Gn), wherein multiple distance measurements (RS1... RSn) are performed between the transit gate (G1... Gn) and the UWB enabled device (10) during the data transfer process. Multiple ranging processes or ranging rounds during the data transfer phase are carried out in this way. The multiple ranging processes support improved security as regards data transfer between UWB enabled mobile device and transit gate.