Terminal Positioning with Timed Device-to-Device Signal Exchange
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Solution Overview
Problem
The measurement method and position estimation method for acquiring position information of a device itself in device-to-device direct communication scenarios, such as within coverage, partial coverage, and outside coverage, or in vehicle to everything (V2X), public safety, and industrial Internet of Things (IIOT), are not clear.
Innovation Solution
A terminal equipped with a reception unit to receive signals for positioning in device-to-device direct communication, a transmitter to transmit signals based on these communications, and a control unit to manage signal transmission by a certain time point, enabling position information acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If device-to-device direct communication is implemented for positioning, then positioning capability in coverage-limited scenarios is improved, but measurement and position estimation methods become unclear
Solution Approach 1:
The patent introduces base stations as intermediary nodes that assist in the positioning process. Base stations receive positioning signals from terminals, perform measurements, and facilitate position estimation even when terminals are in coverage-limited scenarios. This intermediary approach enables positioning functionality without requiring direct terminal-to-terminal measurement clarity.
2Loss of energy
If terminals perform direct communication for positioning, then traffic between terminal and base station is reduced, but measurement methodology becomes undefined
Solution Approach 1:
The patent enables terminals to perform self-positioning by utilizing direct device-to-device signal exchanges. Terminals transmit positioning signals to other terminals and perform measurements autonomously, reducing the need for extensive base station involvement and minimizing uplink/downlink traffic while maintaining positioning functionality.
3Loss of information
If positioning is implemented through device-to-device communication, then positioning information acquisition is enabled, but transmission timing control becomes complex
Solution Approach 1:
The patent implements preliminary synchronization and timing alignment procedures where terminals pre-establish timing relationships before positioning measurements. Base stations provide timing reference information in advance, and terminals perform preliminary signal exchange to establish synchronization, simplifying the actual positioning measurement process and reducing timing control complexity.
Data Source
AI summary
A terminal includes a reception unit configured to receive a signal related to positioning in device-to-device direct communication from another terminal; a transmitter configured to transmit a signal based on the signal related to positioning in the device-to-device direct communication to the other terminal; and a control unit configured to perform control to transmit the signal based on the signal related to positioning in the device-to-device direct communication to the other terminal by a certain time point.