Tx Delay Correction for Accurate NR Positioning Measurements
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Solution Overview
Problem
Existing positioning methods in 3GPP NR are hindered by transmission channel delays (Tx Delay) which cannot be accurately accounted for, leading to large positioning errors and inadequate accuracy.
Innovation Solution
A method and apparatus for correcting Tx Delay by utilizing a location management function (LMF) to receive and transmit Tx Delay parameter information, and correct positioning measurement values using downlink and uplink positioning reference signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If time related measurement values are used for positioning, then positioning functionality is achieved, but positioning accuracy deteriorates due to uncorrectable Tx Delay
Solution Approach 1:
The transmitting node performs preliminary measurement and calculation of its own Tx Delay value before actual positioning operation. This pre-calculated delay value is then provided to the receiving node, enabling the receiver to compensate for the delay in advance rather than dealing with its effects after measurement, thus resolving the accuracy problem while maintaining functionality
Solution Approach 2:
The Tx Delay value acts as an intermediary parameter that bridges the gap between transmitter and receiver timing. By introducing this intermediate delay compensation value, the system enables accurate positioning measurement despite the inherent transmission channel delay that would otherwise make precise measurement impossible
2Device complexity
If Tx Delay is not corrected, then system complexity remains low, but positioning error increases significantly
Solution Approach 1:
The transmitting node performs self-measurement and self-calculation of its Tx Delay value using its own internal clocks and signal generation timing. This self-service approach eliminates the need for complex external synchronization systems or additional hardware, keeping system complexity low while achieving the necessary delay compensation to reduce positioning errors
Data Source
AI summary
Embodiments of the present disclosure provide a method and apparatus for correcting a Tx delay, and a storage medium. The method includes receiving Tx delay (Tx Delay) parameter information transmitted by a transmitting node, and transmitting positioning reference signal configuration information to a receiving node; and correcting a positioning measurement value on the basis of the Tx Delay parameter information, the positioning measurement value being obtained by means of the receiving node measuring, according to the positioning reference signal configuration information, a positioning reference signal transmitted by the transmitting node. In the embodiments of the present disclosure, by using Tx Delay parameter information, the effect of a Tx delay on a time-related positioning measurement value can be eliminated, and the positioning precision is effectively improved.