PRS Positioning in NR Systems Using Subcarrier Interval
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Solution Overview
Problem
The LTE communication system's positioning method based on PRS is not suitable for the NR communication system due to differences in subcarrier intervals and the absence of CRS, leading to inaccurate positioning and high overhead in sequential scanning.
Innovation Solution
A method for determining the position of PRS in the NR communication system by acquiring the subcarrier interval of a resource block and determining the time-frequency position of the PRS, allowing for optimized positioning of user equipment through electronic devices and user equipment processing circuitry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the LTE PRS positioning method is used in the NR communication system, then the positioning can be performed using existing LTE protocols, but the positioning accuracy deteriorates due to differences in subcarrier intervals and absence of CRS
Solution Approach 1:
The patent changes the parameter of subcarrier interval from the fixed LTE value to multiple possible values (15kHz, 30kHz, 60kHz, 120kHz, 240kHz, 480kHz) that adapt to NR system requirements. This allows the PRS positioning method to maintain compatibility while achieving accurate positioning in the NR communication system by matching the subcarrier interval to the actual system configuration.
2Ease of manufacture
If sequential scanning in different directions is performed by a single network side device, then the positioning can be performed using existing LTE methods, but the overhead and delay increase significantly
Solution Approach 1:
The patent segments the positioning function by introducing multiple network side devices (gNBs) that can simultaneously perform positioning measurements. Instead of one device sequentially scanning different directions, multiple devices perform parallel measurements, thereby reducing positioning delay and overhead while maintaining implementation feasibility.
3Ease of manufacture
If sequential scanning in different directions is performed by a single network side device, then the positioning can be performed using existing LTE methods, but the system overhead increases greatly
Solution Approach 1:
The patent segments the positioning function across multiple network side devices, allowing simultaneous parallel measurements. This segmentation reduces the overhead required for sequential scanning by distributing the measurement burden across multiple devices, thereby reducing the total quantity of signaling and measurement resources needed.
4Adaptability or versatility
If multiple subcarrier intervals are supported in the NR communication system, then the system flexibility and adaptability improve, but the PRS design complexity increases
Solution Approach 1:
The patent manages PRS design complexity by systematically defining parameter relationships for multiple subcarrier intervals. Instead of creating entirely separate PRS designs for each interval, the patent establishes consistent parameter mapping rules and formulas that work across all supported intervals (15kHz, 30kHz, 60kHz, 120kHz, 240kHz, 480kHz), thereby maintaining flexibility while controlling design complexity through standardized parameter management.
Data Source
AI summary
The present invention relates to an electronic device, a User Equipment (UE), a method, and a computer readable storage medium. According to the present invention, a method for determining location of a positioning reference signal (PRS) comprises: obtaining a subcarrier interval of a resource block (RB); and determining a time-frequency location of the PRS in the RB according to the subcarrier interval. The electronic device, the UE, the method, and the computer readable storage medium according to the present invention can be used for designing the PRS with respect to an NR communication system more reasonably, so as to optimize the positioning of the UE.