QoS Splitting for NR Sidelink Relay Reliability
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Solution Overview
Problem
In the context of NR sidelink relaying, remote UE and relay UE face challenges in guaranteeing Quality of Service (QoS) requirements, particularly in scenarios where communication status between channels varies, leading to inconsistent QoS across service data transmission paths.
Innovation Solution
A QoS splitting method is implemented by the relay UE to determine and split QoS requirements between a source side and a target side, based on communication status comparisons using indicators such as SL-RSRP, SD-RSRP, and CBR, ensuring that QoS is appropriately allocated and managed across channels to meet end-to-end requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If QoS requirements are split between source side and target side channels, then end-to-end QoS guarantee is improved, but QoS allocation complexity increases
Solution Approach 1:
The patent divides end-to-end QoS requirements into two separate segments: source side QoS (between remote UE and relay UE) and target side QoS (between relay UE and target end node). This segmentation allows independent optimization and management of each channel's QoS parameters, making the complex QoS guarantee problem manageable through modular approach.
Solution Approach 2:
The patent dynamically adjusts QoS parameters (such as priority levels, resource allocation) based on communication status comparison results. When source side channel status is superior to target side, source side QoS is set higher;反之亦然. This parameter adaptation resolves the contradiction by making QoS allocation flexible rather than fixed.
2Reliability
If QoS is allocated based on communication status comparison, then QoS fairness is improved, but signaling overhead increases
Solution Approach 1:
The patent performs communication status comparison and QoS determination in advance before actual data transmission. The relay UE evaluates channel indicators (SL-RSRP, SD-RSRP, CBR) and determines appropriate QoS parameters beforehand, reducing the need for continuous signaling during data transmission and thus lowering overall signaling overhead.
Solution Approach 2:
The patent implements a feedback mechanism where the relay UE continuously monitors communication status indicators and adjusts QoS allocation accordingly. This feedback loop ensures QoS fairness by responding to actual channel conditions while optimizing signaling efficiency through event-triggered updates rather than continuous signaling.
3Productivity
If channel indicators are directly compared, then QoS determination speed is improved, but measurement precision requirements increase
Solution Approach 1:
The patent transforms different types of channel indicators (SL-RSRP, SD-RSRP, CBR) into a unified comparable format by applying appropriate coefficients. This parameter transformation allows direct comparison while accommodating the different measurement scales and units of various indicators, maintaining both speed and precision.
Solution Approach 2:
The patent introduces channel indicator coefficients as intermediary factors that mediate between different measurement types. These coefficients act as conversion factors that harmonize the different measurement precisions and scales, enabling direct comparison without requiring all indicators to have identical precision characteristics.
Data Source
AI summary
Provided in the present invention are a QoS splitting method, a QoS carrying method, and an object side QoS determination method performed by user equipment to guarantee sidelink relay quality of service, and corresponding user equipment. The QoS splitting method is used to split QoS between a source side remote UE and a target end node into source side QoS and target side QoS, and includes: determining a communication status comparison result of a source side channel and a target side channel on the basis of a source side channel indicator and a target side channel indicator; when the communication status comparison result indicates that a communication status of the source side channel is superior to a communication status of the target side channel, causing the source side QoS to be higher than the target side QoS; and when the communication status comparison result indicates that the communication status of the source side channel is inferior to the communication status of the target side channel, causing the source side QoS to be lower than the target side QoS.