Wireless Device Timing Error Feedback for 5G Positioning
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving high accuracy positioning due to timing errors in signal transmissions, which affect the estimated position of wireless devices, particularly in 5G NR systems where a timing error of 50 ns can degrade distance measurement accuracy by 15 meters.
Innovation Solution
A method where a first wireless device assists a network node by providing reference information to help determine the network node's properties, such as timing errors, allowing for compensation and improved positioning accuracy. This involves determining if the device meets certain conditions, transmitting an indication of capability, receiving a request for reference information, and providing timing error data to assist the network node in mitigating measurement errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If timing measurements are used for positioning in 5G NR, then positioning functionality is enabled, but timing errors cause degradation in positioning accuracy
Solution Approach 1:
The patent implements a feedback mechanism where wireless devices report measured timing errors back to the network node. The network node collects these feedback reports from multiple devices and uses them to determine and compensate for its own timing errors, thereby improving positioning accuracy while maintaining positioning functionality
Solution Approach 2:
The patent introduces wireless devices as intermediaries that measure and report timing errors to the network node. These devices act as mediators between the positioning system and the timing error source, enabling the network node to indirectly detect and compensate for its timing errors through device measurements
2Measurement precision
If reference information is collected from wireless devices to determine timing errors, then positioning accuracy is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent changes the parameter being measured from absolute timing values to timing error deviations. By having devices report only the error component rather than complete timing information, the signaling overhead is reduced while still enabling accurate timing error determination for positioning compensation
Data Source
AI summary
A method is disclosed, performed by a first wireless device (WD) for assisting a first network node in determining a network node property. The method comprises determining whether the first WD satisfies one or more conditions for providing reference information. The method comprises, upon determining that the first WD satisfies the condition for providing the reference information, transmitting, to the first network node, an indication indicative of the first WD being capable of providing the reference information. The method comprises receiving, from the first network node, a request to provide the reference information. The method comprises providing, to the first network node, reference information for assisting the first network node in determining a network node property.