NR Terminal Positioning Across Multiple PRS Frequency Layers
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Solution Overview
Problem
Conventional positioning methods in NR systems face limitations in achieving high positioning accuracy due to restricted bandwidth of positioning reference signals (PRS), which cannot meet the demands of scenarios requiring enhanced precision, such as the industrial Internet of Things.
Innovation Solution
A method and apparatus that enable frequency layer aggregation and error compensation in PRSs, allowing terminals to report positioning measurement quantities across multiple frequency layers or per frequency layer, and positioning servers to compensate for errors, thereby improving positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the bandwidth of PRS is limited to one frequency layer, then the system complexity is reduced, but the positioning accuracy deteriorates
Solution Approach 1:
The patent divides the positioning measurement process into multiple frequency layers, where the terminal measures PRS on each frequency layer separately and reports measurements for multiple frequency layers of one TRP. This segmentation allows the system to achieve higher effective bandwidth through aggregation while maintaining manageable complexity at each individual frequency layer.
Solution Approach 2:
The patent combines positioning measurements from multiple frequency layers to achieve higher effective bandwidth and improved positioning accuracy. The terminal aggregates measurements across frequency layers, and the positioning server processes these combined measurements to determine terminal position with enhanced precision.
2Measurement precision
If frequency layer aggregation is implemented, then the positioning accuracy is improved, but the processing complexity increases
Solution Approach 1:
The patent performs preliminary error compensation on each frequency layer before aggregation. The terminal or positioning server compensates for frequency layer errors individually, and then the compensated measurements are aggregated. This preliminary processing simplifies the overall aggregation process and improves accuracy without excessive complexity.
Solution Approach 2:
The patent implements feedback mechanisms where the terminal reports positioning measurement quantities for multiple frequency layers, and the positioning server uses this feedback to calculate position information. The system continuously refines positioning accuracy through iterative measurement and calculation processes.
3Measurement precision
If error compensation is performed across multiple frequency layers, then the positioning precision is enhanced, but the computational load increases
Solution Approach 1:
The patent performs error compensation as a preliminary step before final positioning calculation. Frequency layer error parameters are obtained and used to compensate measurements in advance, reducing the computational burden on the final position calculation while enhancing precision.
Solution Approach 2:
The patent enables the terminal to self-compensate for frequency layer errors using received error parameters, or allows the positioning server to perform compensation centrally. This self-service approach distributes computational load efficiently and reduces overall system complexity.
Data Source
AI summary
Embodiments of this disclosure provide a positioning method and apparatus, and terminal and device. The method performed by a terminal includes: receiving positioning configuration information, wherein the positioning configuration information includes at least one of positioning reference signal configuration information or a first frequency layer error parameter; calculating a positioning measurement quantity according to the positioning configuration information; reporting the positioning measurement quantity to a positioning server; wherein the positioning measurement quantity is reported in the following manner: one positioning measurement quantity is reported for multiple frequency layers of one transmission and reception point (TRP), or one positioning measurement quantity is reported for each frequency layer of one TRP. With the disclosed solution, a more accurate positioning measurement quantity may be obtained, thus the positioning of the terminal is more accurate and positioning accuracy is improved.