Relay Selection Procedure Based on Communication Link Quality Thresholds

Solution Overview

Problem

Conventional wireless communication systems face challenges in efficiently managing relay communication links, particularly when the communication link quality to a same-cell relay device is above a threshold, limiting the ability to select alternative relay devices from different cells, and restricting resource management based on multiple link quality thresholds.

Innovation Solution

Implementing a restricted and unrestricted relay selection procedure based on the quality of the communication link, where the source UE device evaluates relay devices within the same cell if the SL-RSRP level is above a threshold, and considers different-cell relay devices only when the link quality falls below the threshold, allowing for dynamic management of relay communication resources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the source UE device is restricted to same-cell relay UE device reselection when link quality is above threshold, then resource management efficiency is improved, but relay selection flexibility and communication reliability deteriorate

Engineering Contradiction:

Improveresource management efficiencyVSAvoidrelay selection flexibility

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic relay selection behavior that adapts to link quality conditions. When SL-RSRP is above threshold, the device restricts selection to same-cell relays for efficient resource management. When SL-RSRP falls below threshold, the device dynamically switches to unrestricted selection across multiple cells, ensuring communication reliability while maintaining resource efficiency under good conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the relay selection parameter (cell restriction) based on the SL-RSRP quality parameter. A threshold-based mechanism switches between two operational modes: restricted same-cell selection and unrestricted multi-cell selection, optimizing the balance between resource efficiency and selection flexibility according to real-time link quality.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the source UE device performs unrestricted relay reselection to evaluate relay devices in other cells, then relay selection flexibility is improved, but resource management efficiency and network overhead deteriorate

Engineering Contradiction:

Improverelay selection flexibilityVSAvoidresource management efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent implements dynamic relay selection behavior that adapts to link quality conditions. When SL-RSRP is above threshold, the device restricts selection to same-cell relays for efficient resource management. When SL-RSRP falls below threshold, the device dynamically switches to unrestricted selection across multiple cells, ensuring communication reliability while maintaining resource efficiency under good conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the relay selection parameter (cell restriction) based on the SL-RSRP quality parameter. A threshold-based mechanism switches between two operational modes: restricted same-cell selection and unrestricted multi-cell selection, optimizing the balance between resource efficiency and selection flexibility according to real-time link quality.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the source UE device always evaluates relay devices from multiple cells, then communication reliability is improved, but device complexity and evaluation overhead deteriorate

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidrelay evaluation complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the relay evaluation process into two distinct paths: same-cell relay evaluation and different-cell relay evaluation. The segmentation is controlled by link quality thresholds, creating a simplified same-cell path for good conditions and a more comprehensive multi-cell path for poor conditions, reducing overall complexity through conditional branching.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic relay selection behavior that adapts to link quality conditions. When SL-RSRP is above threshold, the device restricts selection to same-cell relays for efficient resource management. When SL-RSRP falls below threshold, the device dynamically switches to unrestricted selection across multiple cells, ensuring communication reliability while maintaining resource efficiency under good conditions.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20240171959A1Restricted relay selection procedure based on communication link quality thresholds

Publication Date: 2024.05.23 KYOCERA CORP

AI summary

A source user equipment (UE) device is restricted to same-cell relay UE device reselection if the communication link quality to the same-cell relay device is above a threshold and network access is available through a same-cell relay UE device. In some situations, relay selection is based multiple thresholds related to a communication link quality of the link to the serving base station of the source UE device.