Data-less Clock Compensation for Wireless Ranging
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Solution Overview
Problem
Existing wireless communication technologies face limitations in ranging sensitivity due to the need for data exchange, which bounds the accuracy of distance measurement between wireless devices.
Innovation Solution
A data-less ranging procedure is implemented, where pre-defined time intervals are used to calculate the time of flight between wireless stations without exchanging data, allowing for improved ranging sensitivity by using local clocks and pre-negotiated time periods to determine the range between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If data exchange is used for ranging measurement, then distance measurement can be performed between wireless devices, but ranging sensitivity is bounded and accuracy is limited
Solution Approach 1:
The patent extracts the essential timing information from the data exchange process. Instead of exchanging full data packets for ranging measurements, the system extracts only the necessary timing markers (transmission and reception times) while eliminating the need for complex data decoding and processing. This extraction of core timing data improves ranging sensitivity by removing the bounding effect of data decode sensitivity.
Solution Approach 2:
The patent implements preliminary clock synchronization and pre-negotiated time interval settings before the actual ranging measurement. By pre-configuring the timing parameters and synchronizing local clocks in advance, the system eliminates the need for complex real-time data exchange during measurement, thereby improving ranging sensitivity while reducing operational complexity.
2Measurement precision
If data exchange is performed for time of flight calculation, then distance measurement is enabled, but the process is bound by data decode sensitivity which limits accuracy
Solution Approach 1:
The patent extracts only the essential timing information (transmission timestamp and reception timestamp) from the communication process, eliminating the need for complete data packet processing. This extraction approach removes the data decode sensitivity bottleneck, allowing for more accurate time of flight calculations without being constrained by data processing limitations.
Solution Approach 2:
The patent skips the traditional data decode and verification steps in the ranging process. By rushing through to capture only the critical timing markers and ignoring the intermediate data processing steps, the system achieves faster and more accurate distance measurements that are not bound by data decode sensitivity.
Data Source
AI summary
Methods for a data-less ranging procedure may include initiating a ranging procedure via a polling message transmitted at a first time and receiving response messages at second and third times. The time intervals between the first and second time and the second and third times may be pre-defined. A time of flight may be calculated based on the pre-defined time intervals and the first, second, and third times.