Terminal Self-Positioning Through Inter-Terminal Measurement Signals
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Solution Overview
Problem
There is a lack of clear position estimation algorithms for device-to-device communication, particularly in scenarios such as inter-terminal direct communication, vehicle-to-everything (V2X), public safety, and industrial IoT, where accurate position information of devices is needed.
Innovation Solution
A terminal equipped with a transmission unit to send position measurement signals, a reception unit to receive signals from other terminals, and a control unit to calculate its own position using inter-terminal direct communication signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If position measurement signals are transmitted between terminals in inter-terminal direct communication, then position information can be acquired, but the device complexity increases due to the need for transmission unit, reception unit, and control unit
Solution Approach 1:
The terminal is designed with multi-functional units that can perform both communication and position measurement functions. The transmission unit transmits both communication signals and position measurement signals, the reception unit receives both types of signals, and the control unit handles both communication control and position calculation, allowing one device to serve multiple purposes without requiring separate dedicated hardware for each function.
Solution Approach 2:
The terminal performs position measurement autonomously using its own transmitted signals and received signals from other terminals. The control unit calculates the position information of the terminal itself by processing signals that the terminal itself transmits and receives, reducing the need for external positioning infrastructure and making the system self-sufficient.
2Adaptability or versatility
If position measurement is performed using inter-terminal direct communication signals, then positioning can be achieved without base station infrastructure, but the measurement precision may be insufficient compared to base station-based positioning
Solution Approach 1:
The position measurement process is divided into distinct functional segments: signal transmission by the terminal, signal reception by other terminals, and position calculation by the control unit. This segmentation allows each component to be optimized independently and enables flexible adaptation to different communication scenarios while maintaining systematic approach to position estimation.
Solution Approach 2:
The system utilizes changes in signal parameters (such as signal strength, time of arrival, or phase) between transmitted and received position measurement signals to determine position information. By monitoring and analyzing parameter variations in the direct communication signals, the terminal can estimate its position without requiring base station infrastructure, adapting the positioning method to work with available communication signal characteristics.
Data Source
AI summary
A terminal includes: a transmission unit that transmits, to one or a plurality of other terminals, a signal related to position measurement in inter-terminal direct communication; a reception unit that receives, from the one or the plurality of other terminals, a signal based on the signal related to the position measurement in the inter-terminal direct communication; and a control unit that calculates position information of the terminal itself by using the signal based on the signal related to the position measurement in the inter-terminal direct communication.