UWB Anchor Frame Format for Dual Radar and DL-TDoA Ranging
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Solution Overview
Problem
There is no standard structure defined in the FiRa consortium's standards for the radar usage of UWB systems, leading to inefficiencies and lack of compatibility with other UWB modes of operation, which hinders the integration of UWB radar technology for real-time locating systems and enterprise applications.
Innovation Solution
The integration of FiRa standards with DL-TDoA and UWB radar technology, enabling dual radar and DL-TDoA ranging by defining new roles for anchors and signaling procedures, including mono-static, bistatic, and multi-static radar modes, with adaptive slot allocation and interference cancellation techniques to optimize resource usage and maintain real-time performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UWB radar detection is enabled on FiRa systems, then real-time locating and radar detection capabilities are improved, but system complexity increases due to lack of standardized structure
Solution Approach 1:
The patent enables UWB anchors to perform multiple functions including positioning, ranging, and radar detection by defining dual roles for anchors (positioning anchor and radar anchor). The ranging frame structure accommodates both DL-TDoA positioning messages and radar detection messages, allowing a single system to serve multiple purposes without requiring separate dedicated infrastructure for each function.
Solution Approach 2:
The patent segments the UWB communication frame into distinct portions: a first portion for DL-TDoA positioning messages and a second portion for radar detection messages. This segmentation allows the system to handle different functions independently within the same frame structure, reducing complexity by providing clear separation of responsibilities while maintaining overall system integration.
2Measurement precision
If radar usage is added to FiRa standards, then detection precision is improved, but compatibility with existing UWB modes deteriorates
Solution Approach 1:
The patent designs the ranging frame to universally accommodate both traditional DL-TDoA positioning operations and new radar detection operations. By defining dual roles for anchors and incorporating both message types into a single frame structure, the system maintains compatibility with existing UWB modes while adding enhanced radar detection capabilities, ensuring that legacy systems can coexist with the enhanced functionality.
3Productivity
If dual radar and DL-TDoA ranging is enabled, then productivity is improved, but resource allocation becomes more complex
Solution Approach 1:
The patent divides the ranging frame into distinct time slots and message portions dedicated to different functions. The first portion handles DL-TDoA positioning while the second portion handles radar detection, enabling simultaneous operations without resource conflicts. This temporal and functional segmentation allows the system to efficiently allocate resources to multiple tasks concurrently.
Solution Approach 2:
The patent introduces dynamic role assignment where UWB anchors can switch between positioning anchor and radar anchor roles based on operational needs. The system dynamically adjusts the frame structure and message formatting depending on whether positioning, radar detection, or both functions are required, optimizing resource utilization while maintaining system flexibility.
Data Source
AI summary
In one aspect, a method is disclosed. The method includes transmitting, from a first anchor in an Ultra-Wide Band (UWB) network, a poll message to a second anchor associated with the UWB network, wherein the poll message includes a first indication of radar usage by the first anchor. The method includes receiving, from the second anchor at the first anchor, a response message in response to the poll message. The response message includes a second indication of radar usage by the second anchor. The method includes determining, by the first anchor, a format of at least one ranging frame to enable dual radar and downlink time difference of arrival (DL-TDoA) ranging by one or more of the first anchor and the second anchor based on the poll message and the response message.