Source Remote UE Relay Selection via Measurement Reporting
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Solution Overview
Problem
The challenge in wireless communication systems is efficiently configuring measurement reports and selecting/reselecting relay user equipment (UE) in UE-to-UE relays to maintain quality of service (QoS) in both direct and indirect paths.
Innovation Solution
A method and device for configuring measurement reports between a relay UE and a target remote UE, involving selecting a relay UE based on signal strength, establishing PC5 connections, and configuring SL measurement configurations to receive measurement results, with thresholds for relay reselection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If relay UE is selected based on signal strength only, then connection establishment is simple, but QoS cannot be maintained in indirect paths
Solution Approach 1:
The patent implements measurement reporting mechanisms where relay UEs continuously report measurement results (such as signal strength, QoS parameters) to source remote UEs. This feedback loop enables dynamic relay selection and reselection based on current network conditions, ensuring QoS maintenance while keeping the selection process manageable through automated reporting and threshold-based decisions.
Solution Approach 2:
The measurement configuration and relay evaluation process is automated through self-service mechanisms. The source remote UE automatically configures measurement parameters, and relay UEs autonomously perform measurements and generate reports without manual intervention. This self-service approach maintains operational simplicity while enabling sophisticated QoS-based relay selection through automated evaluation of multiple parameters.
2Measurement precision
If measurement configuration is detailed and comprehensive, then relay selection accuracy is improved, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring measurement parameters, thresholds, and reporting criteria before relay selection occurs. Source remote UEs and relay UEs are pre-provisioned with measurement configurations that define what to measure, how to measure it, and when to report. This preliminary setup enables accurate relay selection without requiring complex real-time configuration decisions, reducing system complexity while maintaining measurement precision.
Solution Approach 2:
The system dynamically adjusts measurement parameters such as thresholds, reporting intervals, and measurement types based on network conditions and service requirements. Instead of using a fixed complex configuration for all scenarios, the patent modifies parameters adaptively - for example, changing threshold values or reporting frequencies based on QoS requirements - thereby achieving high selection accuracy without permanent system complexity.
3Stability of the object's composition
If relay reselection threshold is set low, then connection stability is improved, but relay switching frequency increases
Solution Approach 1:
The patent implements dynamic threshold adjustment where reselection thresholds are not fixed but adapt based on network conditions, service type, and current connection quality. The system can raise thresholds during stable conditions to prevent unnecessary switching, and lower them when quality degrades to ensure timely reselection. This dynamic approach maintains connection stability without causing excessive relay switching, as thresholds respond adaptively rather than applying static rules.
Solution Approach 2:
The system employs periodic measurement and evaluation cycles with built-in hysteresis and timing mechanisms. Instead of immediate reselection upon threshold violation, the patent uses periodic reporting intervals and hysteresis buffers that require sustained threshold violations before triggering reselection. This periodic action with built-in delays prevents rapid oscillation between relays while maintaining stability, reducing switching frequency without sacrificing connection quality.
Data Source
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AI summary
An embodiment relates to a method of operating a source remote user equipment (UE) related to a measurement reporting configuration of a UE-to-UE relay in a wireless communication system, the method comprising: selecting a relay UE on the basis of a signal strength, by the source remote UE; establishing a PCS connection with the relay UE, by the source remote UE; establishing a PCS connection with a target remote UE through the relay UE, by the source remote UE; configuring, for the relay UE, an SL measurement configuration between the relay UE and the target remote UE, by the source remote UE; and receiving, from the relay UE, a result of measurement between the relay UE and the target remote UE, by the source remote UE.