Relay Reselection Using Dual Quality Thresholds
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Solution Overview
Problem
Conventional wireless communication systems face challenges in managing relay device reselection when the quality of sidelink connections drops below established thresholds, particularly in situations where no candidate relay devices meet the required quality thresholds, leading to link failures and disruptions in UE-to-Network (U2N) and UE-to-UE (U2U) relay connections.
Innovation Solution
Implementing a method where remote UE devices use multiple quality thresholds to evaluate and manage relay reselection, selecting a new relay device only when the candidate device provides a sidelink PC5 link quality above the preferred threshold, while maintaining the current connection if the quality remains above the minimum threshold, thereby minimizing disruptions and ensuring continuous communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay reselection is triggered when sidelink PC5 link quality drops below a single threshold, then connection reliability is improved, but unnecessary reselection and network disruptions increase
Solution Approach 1:
The patent segments the single quality threshold into two distinct thresholds: a preferred quality threshold and a minimum quality threshold. This segmentation allows the system to differentiate between optimal connection conditions and acceptable operational conditions, enabling selective relay reselection behavior that maintains both reliability and stability.
Solution Approach 2:
The patent applies different quality standards to different scenarios: the preferred quality threshold is used to identify optimal relay connections, while the minimum quality threshold determines when reselection is necessary. This local differentiation of quality criteria resolves the contradiction by allowing the system to maintain current connections even when quality deteriorates slightly, avoiding unnecessary reselection disruptions.
2Reliability
If relay reselection is performed frequently to maintain optimal quality, then connection quality is improved, but communication disruptions and latency increase
Solution Approach 1:
The patent introduces dynamic threshold-based decision making where the system adapts its reselection behavior based on current link quality conditions. When quality is above the minimum threshold, the system maintains the current connection dynamically, avoiding frequent reselection. Only when quality falls below the minimum threshold does the system activate reselection, thus reducing latency while maintaining quality.
Solution Approach 2:
The patent ensures continuous communication by maintaining the current relay connection as long as quality remains above the minimum threshold. This continuity principle prevents unnecessary interruptions and latency spikes that would result from frequent reselection, while still allowing quality optimization when conditions permit.
3Stability of the object's composition
If strict quality thresholds are enforced for relay selection, then connection stability is improved, but adaptability to changing network conditions decreases
Solution Approach 1:
The patent changes the parameter approach from a single fixed threshold to a two-level threshold system with distinct preferred and minimum quality levels. This parameter change enables the system to adapt to varying network conditions: it maintains stability when quality is sufficient (above minimum threshold) while allowing optimization when conditions improve (above preferred threshold), thus balancing stability and adaptability.
Data Source
AI summary
A remote user equipment (UE) device manages relay reselection using a plurality of quality thresholds. In one example, when a current communication route from the remote UE device to a communication device through a first relay UE device includes a first sidelink PCS link that has quality less than a preferred quality threshold, the remote UE device evaluates candidate relay UE devices. The remote UE device selects the second relay UE device where the candidate relay UE device provides a communication route with a second sidelink PCS link with a quality greater than the preferred quality threshold and where the quality of the first sidelink PCS link is below a minimum quality threshold and the second sidelink PCS link has a quality above the minimum quality threshold. Otherwise, the remote UE device continues to communicate over the first communication route through the first relay UE device.