Wireless Terminal Radio Link Recovery via Base Station Measurement
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Solution Overview
Problem
In wireless communication systems, there is a challenge in quickly recovering a disconnected link between terminals, such as vehicle-to-vehicle (V2V) links, due to external or internal factors like beam blocking or antenna damage, which affects data transmission and reception.
Innovation Solution
A method is proposed where a terminal determines a radio link failure by assessing received power or ACK/NACK responses, and then requests a measurement configuration from a base station to re-establish the link, including aperiodic channel or beam measurements to restore the connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a terminal determines radio link failure and requests measurement configuration from base station to re-establish link, then link recovery speed is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The base station pre-configures measurement resources and reference signals for potential link recovery scenarios. When link failure occurs, the terminal can immediately utilize these pre-prepared resources to perform measurements and report results, significantly reducing the time required for link recovery without requiring complex real-time configuration exchanges.
Solution Approach 2:
The terminal autonomously determines radio link failure based on predefined criteria (such as reference signal received power thresholds) and initiates the measurement request process without requiring continuous base station monitoring. The terminal also autonomously performs measurements and generates recovery reports, reducing the signaling overhead and complexity of the overall system.
2Measurement precision
If aperiodic channel and/or beam measurement is performed for link recovery, then measurement accuracy is improved, but energy consumption and processing load increase
Solution Approach 1:
Instead of continuous monitoring, the system employs aperiodic measurements that are triggered only when link failure is detected. The terminal performs measurements at specific intervals or events (such as upon receiving a measurement request from the base station), which maintains measurement accuracy while significantly reducing energy consumption compared to continuous monitoring approaches.
Solution Approach 2:
The measurement process focuses resources on specific channels and beams that are most critical for link recovery. The terminal configures measurement resources locally based on the specific failure scenario, allocating measurement energy only to the necessary channels and beams rather than performing comprehensive measurements across all possible channels, thus improving efficiency while maintaining precision.
Data Source
AI summary
The present invention provides a method for re-establishing a link between terminals in a wireless communication system, and a device therefor. Particularly, the method for a first terminal to re-establish a link with another terminal in a wireless communication system comprises: a step of determining a radio link failure with respect to a radio link with a second terminal; a step of transmitting a first message, requesting measurement for re-establishing the radio link with the second terminal, to a base station on the basis of the determined radio link failure; a step of receiving a second message, including information on the configuration of the measurement, from the base station in response to the transmitted first message; and a step of transmitting, to the base station, a third message including a report on the radio link with the second terminal which has been re-established by performing the measurement based on the information on the configuration.