Roadside Differential Positioning Transmission for On-Demand Accuracy
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Solution Overview
Problem
Existing high-precision positioning systems waste energy and time due to continuous transmission of differential positioning information, even when it is not needed, leading to inefficiencies in satellite-based positioning systems.
Innovation Solution
A roadside device determines the necessity of sending differential positioning information based on environmental conditions and satellite signal quality, only transmitting it when required to improve positioning precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the RSU continuously sends differential positioning information to the OBU, then the terminal can perform high-precision positioning calculation, but it causes waste of energy consumption of the roadside device and the terminal
Solution Approach 1:
The patent implements periodic action by having the RSU send differential positioning information at specific intervals rather than continuously. The system determines sending moments based on time intervals and checks whether the terminal is currently performing positioning calculations, thereby reducing energy consumption while maintaining positioning precision when needed.
Solution Approach 2:
The patent applies feedback mechanism where the OBU sends positioning calculation requests to the RSU, and the RSU adjusts its information sending behavior based on whether the terminal needs the data. This feedback loop ensures differential positioning information is transmitted only when the terminal actually performs positioning calculations, avoiding unnecessary energy consumption.
2Measurement precision
If the terminal continuously performs high-precision positioning calculation, then positioning accuracy is maintained, but it extends calculation time and reduces efficiency of high-precision positioning of the system
Solution Approach 1:
The terminal performs positioning calculations periodically rather than continuously by sending positioning calculation requests at specific time intervals. The RSU sends differential positioning information only at these predetermined moments, reducing the terminal's calculation time while maintaining positioning accuracy when needed.
Solution Approach 2:
The terminal autonomously determines when it needs positioning information by monitoring its own positioning calculation requirements. It sends requests to the RSU only when it intends to perform positioning calculations, allowing the system to self-regulate information transmission timing and reduce unnecessary calculation time.
3Measurement precision
If the RSU sends differential positioning information continuously, then the terminal has always available positioning data, but it reduces efficiency of high-precision positioning of the system
Solution Approach 1:
The system adopts periodic action by establishing predetermined time intervals for the RSU to send differential positioning information. The OBU sends positioning calculation requests at these intervals, and the RSU transmits data only at these moments, improving system efficiency while ensuring positioning precision is maintained when calculations are performed.
Solution Approach 2:
The feedback mechanism allows the OBU to inform the RSU when it needs positioning information by sending calculation requests. The RSU responds by sending differential positioning information only at these requested moments, thereby improving overall system efficiency while maintaining positioning precision through on-demand data transmission.
Data Source
AI summary
An information sending method includes: obtaining first information for positioning a terminal device, the first information comprising differential positioning information, or the first information comprising at least one of environmental information or a satellite positioning signal, and differential positioning information; and when the first information satisfies a preset condition, sending the differential positioning information to the terminal device. The method can effectively reduce the sending of unnecessary differential positioning information, thereby avoiding unnecessary energy consumption waste of a roadside device and the terminal device, saving the time of the terminal device to calculate position information, and improving the high-precision positioning efficiency of the system.