Carrier Phase Positioning Method Selection for Ambiguity Resolution
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Solution Overview
Problem
The ambiguity resolution process in carrier phase positioning is unclear, as it is not specified which positioning method should be used for ambiguity resolution in existing systems.
Innovation Solution
A terminal and base station are equipped with a reception unit to receive configuration information for carrier phase positioning and a control unit to determine the appropriate positioning method based on assistance data or requests for assistance data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an existing positioning method is used for ambiguity resolution in carrier phase positioning, then the positioning process can be initiated, but it is unclear which positioning method should be used, leading to uncertainty and potential inefficiency
Solution Approach 1:
The patent applies preliminary action by having the base station pre-determine and notify the terminal of the positioning method to be used for ambiguity resolution before the actual carrier phase positioning occurs. This is achieved through configuration information or assistance data that specifies the positioning method (e.g., DL-TDOA, UL-TDOA, Multi-RTT) in advance, eliminating the uncertainty and decision-making time during the actual positioning process
Solution Approach 2:
The patent uses configuration information and assistance data as intermediaries to transmit the positioning method selection from the base station to the terminal. These intermediaries carry the necessary information about which positioning method should be used, acting as a bridge that resolves the uncertainty without requiring real-time negotiation or complex terminal-side decision-making
2Productivity
If the positioning method for ambiguity resolution is not specified, then the system maintains flexibility in method selection, but the terminal and base station lack clarity on which method to use, reducing operational efficiency
Solution Approach 1:
The patent extracts the positioning method selection information from the general positioning configuration and separates it into specific indication information within the configuration information or assistance data. This extracted information explicitly specifies which positioning method (DL-TDOA, UL-TDOA, Multi-RTT, etc.) should be used for ambiguity resolution, making it readily available to both terminal and base station without losing the overall flexibility of the system
Solution Approach 2:
The patent implements feedback by having the base station notify the terminal of the positioning method selection through configuration information or assistance data. This feedback loop ensures both parties have consistent understanding of which method to use, preventing information loss and improving coordination efficiency in the ambiguity resolution process
Data Source
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AI summary
A terminal includes: a reception unit configured to receive configuration information for carrier phase positioning from a network; and a control unit configured to determine, in carrier phase positioning, a positioning method to be used for wave number determination based on assistance data or a request for assistance data.