Base Station SRS Timing Error Compensation for Positioning Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Inaccurate positioning in wireless communication systems due to timing errors in transmitting and receiving positioning reference signals, which are exacerbated by the time-varying nature of timing error groups (TEGs).
Innovation Solution
A method and apparatus for error measurement and compensation, where a base station measures sounding reference signals (SRSs) from terminals to obtain relative time of arrival (RTOA) measurement values corresponding to different TEGs, and transmits these values or their differences to a location management function (LMF) for error compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple RF Tx chains are used to transmit positioning reference signals, then transmission capability is improved, but timing error increases due to different transmission delay errors
Solution Approach 1:
The patent segments the timing error into different components by introducing TEG (Timing Error Group) classification. Different RF chains are grouped based on their timing error characteristics, allowing the system to manage and compensate for timing errors in a structured manner while maintaining multiple transmission chains for improved productivity.
2Productivity
If multiple RF Rx chains are used to receive positioning reference signals, then reception capability is improved, but timing error increases due to different transmission time delay errors
Solution Approach 1:
The patent applies segmentation to reception by classifying RF chains into different TEGs based on their timing error characteristics. This allows the system to maintain multiple reception chains for improved capability while managing timing errors through structured grouping and compensation mechanisms.
3Measurement precision
If TEG is introduced to improve positioning accuracy, then measurement precision is improved, but device complexity increases due to time-varying characteristics
Solution Approach 1:
The patent acknowledges the time-varying nature of TEG characteristics and implements dynamic adjustment mechanisms. The system can adapt TEG configurations in real-time based on changing timing error conditions, maintaining positioning accuracy while managing complexity through flexible, dynamic rather than static configurations.
4Adaptability or versatility
If different TEGs are used for transmission or reception, then adaptability is improved, but positioning accuracy deteriorates due to residual errors after double-difference
Solution Approach 1:
The patent implements feedback mechanisms that monitor positioning accuracy and TEG performance in real-time. Based on this feedback, the system can adjust TEG selections and configurations to optimize positioning accuracy while maintaining the flexibility to adapt to different transmission and reception conditions.
Data Source
AI summary
Embodiments of the present disclosure provide an error measurement method and an error compensation method, and apparatuses. The error measurement method includes: measuring, by a base station, sounding reference signals (SRSs) transmitted by a terminal to obtain relative time of arrival (RTOA) measurement values corresponding to different timing error groups (TEGs); and transmitting, by the base station, the RTOA measurement values or a difference between the RTOA measurement values corresponding to different TEGs to a location management function (LMF).