Relay Device Signal Sequence Differentiation for Positioning Accuracy
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Solution Overview
Problem
In wireless communication systems using relay devices, positioning accuracy is compromised due to delays in radio wave propagation, leading to large positioning errors when terminal devices rely on signals relayed through these devices.
Innovation Solution
The implementation of a relay device that generates and relays signals with distinct sequences, allowing terminal devices to differentiate between direct and relayed signals, enabling correction of signal arrival times to account for processing delays, thereby improving positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a relay device is used to amplify and relay radio waves, then the communicable area is increased, but the positioning error becomes very large due to relay processing delay
Solution Approach 1:
The patent introduces a specific signaling mechanism where the relay device transmits a relay indication signal to the terminal device. This intermediary signal allows the terminal device to identify that it is receiving a relayed signal rather than a direct signal from the base station, enabling it to correct the positioning calculation by compensating for the relay processing delay.
2Ease of operation
If the terminal device uses signal arrival time for position estimation, then the positioning method is simple, but the position estimation accuracy is compromised when signals are relayed
Solution Approach 1:
The patent segments the signal transmission path into direct paths (base station to terminal) and relayed paths (base station to relay device to terminal). By using distinct sequences for direct and relayed signals, the terminal device can separately identify and process these different path types, applying appropriate timing corrections only to relayed signals while maintaining simple processing for direct signals.
Data Source
AI summary
A relay device that relays a wireless signal received from a base station device to a terminal device performs control so that, when a predetermined signal generated using a first sequence is received from the base station device, the predetermined signal corresponding to a signal generated using a second sequence corresponding to the first sequence and not to be used by the base station device to generate the predetermined signal is relayed to the terminal device.