Carrier Phase Positioning Correction With Multi-Device PRS
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Solution Overview
Problem
Carrier phase positioning technology based on OFDM signals in the NR system is affected by transmission and reception timing errors in user equipment (UE)/base station, leading to poor positioning accuracy.
Innovation Solution
A method and device for determining a correction parameter using positioning reference signals (PRS) and position information from multiple devices to correct carrier phase measurement values, which includes calculating timing error correction parameters and transmitting these parameters to a target UE or a location management function (LMF) entity for compensation processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If carrier phase positioning technology based on OFDM signals is used, then positioning precision can be improved, but transmission and reception timing errors cause measurement errors that worsen positioning accuracy
Solution Approach 1:
The patent introduces a correction parameter as an intermediary element that mediates between the timing errors and the carrier phase measurement. The correction parameter is calculated based on timing error information from multiple base stations and is used to correct the carrier phase measurement, thereby eliminating the harmful effect of timing errors on positioning accuracy
Solution Approach 2:
The patent implements a feedback mechanism where timing error information is collected from multiple base stations, processed to generate correction parameters, and then fed back to correct the carrier phase measurements. This closed-loop feedback system continuously improves measurement reliability by compensating for timing errors
2Measurement precision
If correction parameters are calculated and transmitted to correct carrier phase measurements, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent enables the user equipment to perform self-correction of carrier phase measurements using the received correction parameters. The UE autonomously calculates the corrected carrier phase measurement by combining the raw measurement with the correction parameter, eliminating the need for complex network-side processing and reducing overall system complexity
Solution Approach 2:
The patent divides the positioning system into independent functional modules: timing error collection at base stations, correction parameter calculation, and carrier phase correction at the UE. This segmentation allows each module to operate independently with well-defined interfaces, reducing overall system complexity while maintaining high positioning accuracy
Data Source
AI summary
The present disclosure relates to the technical field of communication technologies, and provided are an information transmission method and a carrier phase positioning method and device. The information transmission method includes: receiving, by a first device, PRS and position information of at least two second devices, sent by the at least two second devices; determining, by the first device, a correction parameter according to the PRS and position information of the at least two second devices, where the correction parameter is used to correct a carrier phase measurement value of a target user equipment (UE); transmitting, by the first device, first information to the target UE or a location management function (LMF) entity; wherein the first information includes the correction parameter.