Non-Standard QoS Flow CAPC Assignment for Sidelink LBT

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Solution Overview

Problem

In sidelink communication, user equipments (UEs) with non-standard QoS flows face challenges in determining channel access priority classes (CAPCs) due to network unawareness, leading to inadequate performance in tasks like LBT monitoring and packet assembly.

Innovation Solution

A method for determining CAPCs based on QoS parameters, network-configured information, or terminal implementation, allowing UEs to autonomously assign CAPCs for non-standard QoS flows.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If UEs use non-standard QoS flows in sidelink communication, then service flexibility and adaptability are improved, but the network cannot provide CAPC configuration leading to inadequate LBT monitoring and packet assembly performance

Engineering Contradiction:

Improveservice flexibilityVSAvoidLBT monitoring performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The UE autonomously determines the CAPC for non-standard QoS flows by evaluating QoS parameters (priority, delay budget, reliability requirement) according to predefined mapping rules, without requiring network configuration. This self-service mechanism enables the UE to independently resolve the CAPC determination problem for non-standard QoS flows, maintaining both service flexibility and reliable LBT monitoring performance

Inventive Principle:

Principle #25Self-service

2Device complexity

If UEs autonomously determine CAPC for non-standard QoS flows, then network configuration complexity is reduced, but determination accuracy may be compromised without network guidance

Engineering Contradiction:

Improvenetwork configuration complexityVSAvoidCAPC determination accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent transforms the CAPC determination from a network-configured parameter into a dynamically calculated parameter based on QoS parameters. The UE maps QoS parameters (priority, delay budget, reliability) to CAPC values using predefined rules, converting static network configuration into dynamic parameter-based determination that maintains accuracy while reducing network complexity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces QoS parameters as an intermediary between the non-standard QoS flow and the CAPC determination. Instead of direct network configuration, the QoS parameters serve as the basis for CAPC selection through predefined mapping relationships, enabling accurate determination without network involvement

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If UEs perform LBT monitoring and packet assembly for non-standard QoS flows, then communication functionality is improved, but performance is inadequate without proper CAPC assignment

Engineering Contradiction:

Improvecommunication functionalityVSAvoidcommunication efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent performs preliminary CAPC determination by evaluating QoS parameters before the actual LBT monitoring and packet assembly operations. The UE calculates the appropriate CAPC in advance based on priority, delay budget, and reliability requirements, ensuring that subsequent communication operations can proceed with optimal performance rather than inadequate default settings

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250317963A1Method for determining channel access priority classes, and device and non-transitory computer-readable storage medium

Publication Date: 2025.10.09 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

A method for determining channel access priority classes (CAPCs) is provided in the present disclosure. The method is applicable to a terminal, and the method includes: determining a CAPC of a first non-standard quality of service (QOS) flow. The first non-standard QoS flow is different from a standard QoS flow, that is, the first non-standard QoS flow is not defined by communication protocols.