Multi-Carrier Phase Positioning Capability Reporting for Integer Ambiguity
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Solution Overview
Problem
Existing carrier phase-based positioning methods suffer from integer ambiguity issues, limiting the accuracy of positioning measurements, and there is a lack of methods for reporting terminal capabilities in transmitting multi-carrier-frequency positioning signals.
Innovation Solution
A method and apparatus for determining multi-carrier-frequency carrier phase positioning capability by enabling terminals to send positioning capability information to network devices, indicating their ability to transmit and receive multi-carrier-frequency positioning signals, including details on supported carrier frequencies and combinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If carrier phase-based positioning is performed using fractional part and integer number of complete cycles, then positioning measurement can be conducted, but integer ambiguity problem occurs and positioning accuracy is limited
Solution Approach 1:
The patent segments the carrier wave into multiple carrier waves with different frequencies (first carrier wave and second carrier wave). By dividing the single-frequency measurement into multi-frequency measurements, the system can resolve integer ambiguity through frequency comparison while maintaining positioning measurement capability.
Solution Approach 2:
The patent changes the frequency parameter of the carrier wave by introducing multiple carrier waves with different frequencies. This parameter change enables the system to overcome the integer ambiguity limitation of single-frequency carrier phase measurements by utilizing the different wavelengths and phase relationships across frequencies.
2Measurement precision
If multi-carrier-frequency positioning signals are transmitted, then positioning accuracy and flexibility are improved, but terminal capability reporting mechanisms are lacking
Solution Approach 1:
The patent implements preliminary action by having the terminal report its multi-carrier-frequency positioning capability to the network device before actual positioning measurements are performed. This advance capability reporting allows the network to configure appropriate multi-carrier-frequency positioning signals based on the terminal's supported frequencies and combinations, avoiding the need for complex runtime capability negotiation.
3Device complexity
If single-frequency carrier phase positioning is used, then system complexity is low, but positioning accuracy is limited due to integer ambiguity
Solution Approach 1:
The patent adds another dimension to the positioning system by introducing multiple frequency dimensions. Instead of relying solely on phase measurements at a single frequency, the system performs measurements across multiple frequency dimensions, enabling integer ambiguity resolution through the additional measurement data while managing complexity through structured capability reporting.
Data Source
AI summary
Disclosed in embodiments of the present disclosure are a method for determining multi-carrier frequency carrier phase positioning capability and an apparatus. The method comprises: a terminal device sends positioning capability information to a network side device, wherein the positioning capability information is used for indicating capability information of multi-carrier frequency positioning signal transmission (S21). The terminal device is supported to report the positioning capability information, so as to improve the flexibility of the terminal device and improve the accuracy of positioning measurement.