FBE Resource Configuration for Unified CCA Across LBT Bands

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Solution Overview

Problem

Existing wireless communication systems on unlicensed spectrum face inefficiencies in channel access and resource utilization due to independent CCA monitoring on each LBT band, leading to low frequency domain resource usage efficiency and increased transmission delays.

Innovation Solution

Configuring a frame-based equipment (FBE) parameter that includes frequency domain resources for clear channel assessment (CCA), allowing for simultaneous uplink and downlink transmissions on different frequency bands, thereby reducing conflicts and improving resource efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If independent CCA monitoring is performed on each LBT band, then channel access control is achieved, but frequency domain resource usage efficiency deteriorates

Engineering Contradiction:

Improvechannel access controlVSAvoidfrequency domain resource usage efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent merges multiple LBT bands into a unified resource pool and performs CCA monitoring on the aggregated resource rather than independently on each band. This combining approach allows more efficient utilization of frequency domain resources while maintaining reliable channel access control through the unified CCA process.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If independent CCA monitoring is performed on each LBT band, then channel access reliability is improved, but transmission delay increases

Engineering Contradiction:

Improvechannel access reliabilityVSAvoidtransmission delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

By aggregating multiple LBT bands into a unified resource pool for CCA monitoring, the system reduces the time required to find available resources. The merged approach allows faster channel access determination compared to sequential independent monitoring, thereby reducing transmission delay while maintaining access reliability.

Inventive Principle:

Principle #5Merging (Combining)

3Device complexity

If frequency domain resources are not configured for CCA, then device complexity is reduced, but resource usage efficiency deteriorates

Engineering Contradiction:

Improveconfiguration complexityVSAvoidresource usage efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent introduces frequency domain resource configuration parameters to define the CCA monitoring scope. By changing the parameter representation from individual band configurations to aggregated resource pool definitions, the system maintains low configuration complexity while achieving high resource usage efficiency through the unified CCA approach.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12477571B2Method for resource configuration, and communication device

Publication Date: 2025.11.18 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A method for resource configuration, applied to a base station, including: configuring a frame based equipment (FBE) parameter, where the FBE parameter includes: a frequency domain parameter indicating a frequency domain resource for performing clear channel assessment (CCA).