Terminal Measurement Time Determination for Positioning Accuracy
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Solution Overview
Problem
Existing positioning methods based on carrier phase measurements face ambiguity in integer cycles, leading to inaccuracies in positioning measurements.
Innovation Solution
A method and apparatus for determining a measurement time by receiving positioning configuration information and measurement time configuration parameters from a network-side device, allowing terminals to measure positioning signals on multiple carrier frequencies within specified time ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If carrier phase measurement is used for positioning, then positioning capability is provided, but ambiguity in integer cycles reduces measurement precision
Solution Approach 1:
The patent transitions from single-frequency carrier phase measurement to multi-frequency carrier phase measurement. By measuring carrier phases at multiple frequencies (e.g., 1st frequency and 2nd frequency), the system resolves the integer cycle ambiguity that plagues single-frequency measurements. The additional frequency dimension provides redundant information that enables disambiguation of the integer cycle component.
Solution Approach 2:
The patent changes the measurement parameter from single-frequency carrier phase to multi-frequency carrier phase. By configuring the terminal to measure carrier phases at different frequencies with different cycle lengths, the system can determine both fraction parts and integer cycles more accurately. The network device configures measurement time parameters specifically tailored for multi-frequency measurements to optimize the resolution of phase ambiguity.
2Measurement precision
If measurement time is extended to capture multiple carrier frequencies, then positioning accuracy improves, but time consumption increases
Solution Approach 1:
The network device performs preliminary configuration by providing measurement time configuration parameters to the terminal before the actual positioning measurement takes place. These parameters pre-define the measurement time window, frequency configurations, and other necessary parameters, allowing the terminal to efficiently execute the measurement without unnecessary delays or iterative adjustments.
Data Source
AI summary
A method for determining a measurement time is performed by a terminal. The method includes: receiving positioning configuration information from a network-side device, wherein the positioning configuration information indicates at least two pieces of carrier frequency information of a positioning signal; and receiving a measurement time configuration parameter from the network-side device, wherein the measurement time configuration parameter indicates a measurement time of the positioning signal.