Relay Terminal Path Switching for Radio Link Failure Reporting
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Solution Overview
Problem
Existing wireless communication systems face challenges in performing relay communication efficiently and accurately, particularly in scenarios requiring enhanced mobile broadband, massive Machine Type Communication, and Ultra-Reliable and Low Latency Communication, such as vehicle-to-everything (V2X) communication.
Innovation Solution
The implementation of a method for forming multiple paths, including a direct and indirect paths, and reporting measurement information related to the technical problem, and transmitting system information block requests through specific paths, with timers configured for radio link failure reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal forms multiple paths (direct and indirect) for communication, then communication reliability is improved through path diversity, but device complexity increases due to multiple path management
Solution Approach 1:
The terminal segments the communication path into multiple independent paths (direct path to first cell, indirect path through relay UE to second cell). This segmentation allows the system to maintain communication reliability by distributing traffic across multiple routes while managing complexity through modular path handling, where each path can be independently monitored and controlled.
Solution Approach 2:
The terminal dynamically switches between direct and indirect paths based on real-time conditions such as radio link failure detection. When the direct path experiences RLF, the system dynamically transitions to the indirect path through the relay UE, and vice versa. This dynamic adaptability maintains communication reliability while the automation of path switching reduces the perceived complexity for the user.
2Measurement precision
If measurement information is reported through the path without RLF, then measurement accuracy is improved, but transmission time increases due to potential relay hopping
Solution Approach 1:
The terminal continuously monitors the status of both direct and indirect paths for radio link failures and uses this feedback to dynamically select the optimal reporting path. When the direct path is healthy, measurement information is reported through it for low latency. When RLF is detected on the direct path, the system switches to the indirect path through the relay UE, ensuring measurement accuracy is maintained while minimizing transmission delays through intelligent path selection.
3Area of stationary object
If relay communication is implemented for enhanced coverage, then communication coverage is improved, but signal transmission loss increases through additional relay hops
Solution Approach 1:
The system dynamically selects between direct and indirect paths based on real-time radio conditions. When the direct path is available and strong, communication occurs directly to minimize signal loss. When coverage extension is needed or the direct path deteriorates, the system dynamically switches to the indirect path through the relay UE. This dynamic adaptation allows the system to extend coverage area while minimizing unnecessary signal transmission loss through relay hops.
Data Source
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AI summary
A method by which a terminal performs relay communication, and a device, according to various embodiments, are disclosed. Disclosed are the method and the device, the method comprising the steps of: forming a first path, which is a direct path directly connected to a first cell; forming a second path, which is an indirect path connected to a second cell through a first relay terminal; and, based on occurrence of a radio link failure (RLF) in one of the first path and the second path, reporting, through the path on which the RLF has not occurred, measurement information related to the one path.