Embedding Timing Error Group Information in Reference Signals
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G networks, face challenges in accurately determining the location of mobile devices due to internal timing errors associated with the transmission and reception of reference signals, which can lead to significant positioning errors despite advancements in spectral efficiency and reduced latency.
Innovation Solution
The method involves embedding timing error group information in reference signals, allowing receiving stations to apply compensation values and improve the accuracy of time-of-flight based positioning techniques by transmitting this information through sidelinks, reducing messaging overhead and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If timing error group information is embedded in reference signals, then positioning accuracy is improved, but reference signal structure complexity increases
Solution Approach 1:
The timing error group information is nested within the existing reference signal structure by mapping it to resource elements that are already part of the reference signal transmission framework. This allows the additional timing information to be carried without requiring a completely separate transmission mechanism, thus improving positioning accuracy while limiting the increase in structural complexity to within the existing signal framework.
Solution Approach 2:
The patent changes parameters of the reference signal such as mapping timing error group information to specific resource elements, using different modulation schemes, or varying the signal characteristics based on the timing error values. This allows the reference signal to carry additional positioning information by modifying its parameters rather than adding fundamental structural complexity.
2Measurement precision
If timing error compensation is applied, then positioning precision is improved, but processing time increases
Solution Approach 1:
The timing error group information is transmitted along with the reference signal itself, allowing the receiving device to have the timing error compensation values ready before the actual positioning calculation is performed. This preliminary provision of timing information enables more efficient processing during the positioning calculation phase, reducing overall processing time while maintaining positioning precision.
3Measurement precision
If multiple reference signals are transmitted with timing information, then positioning accuracy is improved, but messaging overhead increases
Solution Approach 1:
The timing error group information is merged with the reference signal transmission, combining the positioning reference signal and timing information into a single transmission mechanism. This merging approach allows multiple reference signals to be transmitted with embedded timing information without requiring separate communication channels, thus improving positioning accuracy while minimizing the increase in messaging overhead.
Solution Approach 2:
The reference signal is designed to serve multiple functions: it provides positioning reference information and simultaneously carries timing error group information. This multi-functionality allows the same transmission mechanism to handle both positioning and timing compensation without requiring additional dedicated signals, thereby reducing overall messaging overhead while maintaining positioning accuracy.
Data Source
AI summary
Techniques are provided for embedding timing error group (TEG) information in reference signals. An example method for determining a timing error group associated with internal timing errors of a first station includes receiving the reference signal including embedded timing error group information from a first station, and determining a timing group error value based at least in part on the embedded timing error group information.