Bandwidth Part Segmentation for NR Clear Channel Assessment

Solution Overview

Problem

In New Radio (NR) technologies, large bandwidths of Bandwidth Parts (BWPs) can affect the transmission success rate due to clear channel assessment (CCA) limitations, particularly when the BWP bandwidth exceeds 20 MHz.

Innovation Solution

The proposed solution involves dividing the BWP into multiple resource subsets, each with a bandwidth less than 20 MHz, and allocating these subsets to physical uplink shared channels (PUSCH) or physical uplink control channels (PUCCH). The method includes generating indication information with an interleave index for resource interleaving and transmitting UE-group common downlink control information to indicate remaining channel occupancy time and subcarrier spacing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If the bandwidth of BWP is increased to provide larger transmission capacity, then the data transmission capability is improved, but the transmission success rate deteriorates due to CCA limitations

Engineering Contradiction:

Improvetransmission capacityVSAvoidtransmission success rate

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The BWP is divided into multiple resource subsets, each with bandwidth less than 20 MHz. This segmentation allows independent CCA assessment for each subset, so that if one subset fails CCA, other subsets can still transmit data, thereby maintaining transmission success rate while preserving overall transmission capacity.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If the BWP bandwidth is larger than 20 MHz, then the resource allocation flexibility is improved, but the CCA result impact increases leading to transmission failures

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidtransmission success rate

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The BWP is divided into multiple resource subsets, each with bandwidth less than 20 MHz. This segmentation allows independent CCA assessment for each subset, so that if one subset fails CCA, other subsets can still transmit data, thereby maintaining transmission success rate while preserving overall transmission capacity.

Inventive Principle:

Principle #1Segmentation

3Productivity

If the BWP bandwidth is increased to exceed 20 MHz, then the channel utilization is improved, but the CCA failure impact spreads across the entire BWP

Engineering Contradiction:

Improvechannel utilizationVSAvoidtransmission success rate

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The BWP is divided into multiple resource subsets, each with bandwidth less than 20 MHz. This segmentation allows independent CCA assessment for each subset, so that if one subset fails CCA, other subsets can still transmit data, thereby maintaining transmission success rate while preserving overall transmission capacity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different resource subsets within the BWP can have different transmission characteristics and CCA outcomes. Each subset is independently assessed and transmitted based on its local channel conditions, allowing optimized resource utilization where available while isolating failures to specific subsets only.

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP3952528B1Transmission method and device

Publication Date: 2025.04.16 ZTE CORP

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Figure 5b~6a

AI summary

Provided are a transmission method and apparatus, a device, a system and a storage medium. The transmission method includes: allocating to-be-transmitted information to at least one resource subset of a target transmission resource, where the target transmission resource is divided into a plurality of resource subsets; and transmitting corresponding to-be-transmitted information on the allocated at least one resource subset.