Repeater-Assisted UE Positioning With Delay-Aware Signal Measurement
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Solution Overview
Problem
In 5G radio access systems, the use of smart repeaters for UE positioning results in inaccurate location calculation due to the connection between the UE and the base station via the repeater.
Innovation Solution
A communication system is designed with a core network-side apparatus, a base station, and a repeater that facilitates relay processing, where the repeater provides information on propagation delay, location, and processing delay to the core network, and the communication terminal measures positioning signals, enabling the core network to calculate the UE's location accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a smart repeater is used for relay processing between the base station and the communication terminal, then the communication coverage and signal quality are improved, but the location calculation accuracy becomes inaccurate
Solution Approach 1:
The patent introduces a location measurement signal as an intermediary to bridge the gap between the base station and the communication terminal through the repeater. This special signal is designed to carry location information that can be accurately measured and processed, allowing the network to determine the terminal's location despite the presence of the repeater in the signal path.
Solution Approach 2:
The patent changes the parameters of the location measurement signal to make it distinguishable from other signals. By using specific signal characteristics and parameters, the system can accurately measure location information even when the signal passes through the repeater, thus resolving the accuracy issue while maintaining the repeater's relay function.
2Adaptability or versatility
If the repeater performs relay processing for the communication terminal, then the communication capability in coverage areas is enhanced, but the positioning accuracy deteriorates
Solution Approach 1:
The patent segments the communication signals into different types: normal communication signals that pass through the repeater for relay processing, and location measurement signals that are specifically designed to bypass the repeater's signal processing or are processed in a controlled manner. This segmentation allows the system to maintain both communication capability and positioning accuracy.
Solution Approach 2:
The patent implements a feedback mechanism where the communication terminal measures the location measurement signal and reports the measurement results to the network. The network then uses this feedback information to calculate the terminal's location accurately, compensating for any distortions introduced by the repeater.
3Ease of operation
If the core network calculates location based on signals passing through the repeater, then the positioning function is maintained, but the location results become inaccurate
Solution Approach 1:
The patent introduces a location measurement signal as an intermediary that directly involves the communication terminal in the measurement process. The terminal measures this signal and provides the measurement results to the core network, which then calculates the location. This intermediary approach ensures accuracy by using direct measurement data rather than relying on signals that have been processed by the repeater.
Solution Approach 2:
The patent performs preliminary location measurement actions by having the communication terminal measure the location measurement signal before the core network performs the location calculation. This preliminary measurement ensures that the core network receives accurate location information, which it then uses to calculate the terminal's position with high precision.
Data Source
AI summary
A communication system includes a core network-side apparatus a base station and a repeater configured to perform relay processing between the base station and a communication terminal, the repeater being configured to notify the core network-side apparatus of at least one of information on propagation delay between the base station in connection and the repeater, information on a location of the repeater, and information on processing delay in the repeater, the communication terminal being configured to perform measurement of a positioning signal transmitted by the repeater, and notify the core network-side apparatus of measurement results of the positioning signal, and the core network-side apparatus being configured to calculate a location of the communication terminal, based on the information notified from the repeater and the measurement results notified from the communication terminal.