Information sending method, information receiving method, and communication apparatus
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Solution Overview
Problem
Existing UE-based carrier phase positioning methods suffer from non-ideal factors such as synchronization errors, random initial phase errors, clock shift frequency offsets, and engineering parameter errors, which degrade positioning accuracy.
Innovation Solution
Implementing a double-difference carrier phase positioning method using phase information obtained by a reference device, which eliminates errors caused by non-ideal factors through the use of phase differences and additional information like RSTD and AOD, enabling high-precision positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UE-based carrier phase positioning method is used, then positioning capability is provided, but positioning accuracy is degraded due to non-ideal factors such as synchronization errors, random initial phase errors, clock shift frequency offsets, and engineering parameter errors
Solution Approach 1:
The patent introduces a reference device as an intermediary between the network device and the terminal device. The reference device measures the reference signal and provides phase information to the terminal device, which then performs double-difference carrier phase positioning. This intermediary approach eliminates the direct dependency on network device parameters that cause measurement errors, thereby resolving the technical contradiction between providing positioning capability and maintaining positioning accuracy.
Solution Approach 2:
The patent changes the parameter measurement approach from direct terminal device measurement to reference device measurement. By having the reference device measure the phase information and providing it to the terminal device, the system transforms the measurement parameters into a form that can be used for double-difference positioning, eliminating the harmful effects of synchronization errors and other non-ideal factors.
2Measurement precision
If double-difference carrier phase positioning method is implemented, then positioning accuracy is improved by eliminating errors, but device complexity increases due to additional reference device and information processing
Solution Approach 1:
The patent segments the positioning function into distinct components: the reference device measures the reference signal phase, the network device provides reference signal information, and the terminal device performs the final positioning calculation using double-difference methodology. This segmentation allows each component to specialize in a specific task, improving overall accuracy while distributing the complexity across multiple devices rather than concentrating it in one device.
Data Source
AI summary
A communication apparatus and information sending method, the method including obtaining, by a first device, first information, where the first information comprises phase information obtained by a reference device by measuring a reference signal, and the first information is associated with positioning, and sending, by the first device, the first information to a positioning terminal device.